Fm radio alignment procedure. Radio frequency (RF) alignment is also known as tracking.
7 Checking AVC Action. Set signal generator to FM 4. 405 MHz /- 20 Hz Jan 9, 2024 · The other alignment steps, which depend on the type of "receiver" you have, require low distortion wide bandwidth FM, and FM MPX generator. 8VDC, 10A) Frequency Counter (100 MHz) RF Wattmeter (25~60 MHz, 25W) RF Signal Generator (100 MHz) Multimeter Automatic Distortion Meter Automatic Modulation Meter Oscilloscope (50 MHz) Audio Signal Generator Sinad Meter 4. The only items I adjust outside of the front end are usually just the discriminator coil for center tune center, and variable tuning pots for FM muting, FM Signal strength (after front end tuning), and stereo threshold level. Perhaps OP has a tech school near by. Figure1. Mic Gain fully clockwise. The first alignment procedure is for those who do not have test equipment and the second is for those who do have test equipment. The alignment of superheterodyne radios has been a mystery to more technicians in the radio/television field than almost any other servicing procedure. Inject 100uv at 5Khz dev. Key the transmitter and check for 4 kHz deviation ±0. Included are disassembly procedures, alignment pro-cedures and troubleshooting information (see Table of Contents). If you want the best out of a tuner, so to say the last drop, you do need indeed some test gear, but not off the shelf made in china, but calibrated to defined standards. Procedure; 1: AM 60% Mod. Page 2 The AM/FM Radio project is divided into two parts, the AM Radio Section and the FM Radio Section. Apr 19, 2009 · Works best with a signal generator or you can use two radio stations at the high and low ends of the band. The best way to align a radio is to use an RF signal generator with a modulated output and an analog voltmeter connected to your radio's speaker terminals or earphone jack to monitor your progress; but as you will see later in this document you can survive without these luxuries. I've never aligned one, so I can't tell you anything about it. USE OF THE OSCILLOSCOPE IN RADIO RECEIVER SERVICING 35 5. After I restored a Grundig 3198 with excellent results I've been using it on FM radios ever since. L15 and L14: Adjust for maximum reading on the AF Cossor 1324 FM Alignment Generator Repair/Restoration Vintage Test Gear and Workshop Equipment We would like to show you a description here but the site won’t allow us. ) Alignment procedure: TEST ITEM TEST CONDITION & Page 6 29-LX ALIGNMENT REVISION: 00 ENG-29-LX-08 5. Solid State AM-FM Receivers 17. AM/FM Radio Test and Alignment Application Note The test, alignment, and troubleshooting of a conventional AM/FM radio is a fundamental skill for any electronic technician. For example: It tells you to adjust T1, T2 and T3 for the minimum voltage and reduce the Volume if necessary. (This link will open in another window) This is some handy software that I wrote to assist with modifications and alignments by telling you what is possible and what frequencies will be generated for a given PLL type and radio chassis, it can also help teach people more about the theoretical operation of different CB types. 8 VDC. Take for example the Magnivox AM/FM radio (2nd image). Many of these radios have been converted into the Ham bands The Art of Alignment The aim of this demonstration is to give an insight into the need for alignment of radios or TVs and to show how to align a typical radio. Set mode SW to FM 3. There is a good chance things will get worse after screwing the coils. Feb 16, 2014 · CHAPTER V. the tuner cap. At this time, only identify the parts that you will need for the AM radio as listed below. I have tested several samples of the CC-2E and also the new CC-3 and all of them improved after this simple procedure. 2. L19 L20 L18: At first, turn down the coar of L18 to end. jack an scheck frequency for 27. GE Superadio III model 7-2887A Alignment Procedure Instructions. Dec 1, 2007 · I was able to verify that the "FM Stereo" light DOES work. The AM/FM meter is dead on and I think I have good selectivity and sensitivity. All I can say: FM-strip alignment is very tricky, specially the ratio detector. From the Carver TX-11 Manual: Jun 8, 2022 · AM/FM ALIGNMENT of this vintage vacuum tube radio receiver. May 25, 2021 · The WorldwideDX Radio Forum was originally established in 2001. This radio is adjusted by setting personality parameters stored in the radio computer memory. S. I'd never consider alignment unless everything else is perfect, ESPECIALLY if a set is poor on AM and FM. Thread starter yo00; Start date Apr 25, 2018; Tags fm alignment Y. SEMICONDUCTOR INFORMATION Set radio to SSB TX mode. Receiver Alignment: 1. Step Condition Adjustment Procedure; 1: CH: 19 BAND: MID POWER: Max. 6 AFC Alignment. my way. " Jun 22, 2021 · Those alignment instructions were written for the use of ancient analog instruments. jack Page 1 AE5890 EU ALIGNMENT PROCEDURE SUPPLY VOLTAGE: 13. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright demodulator in FM radio receiver) output. This is one reason why you can't play a portable FM radio onboard It explains that AM radio alignment requires basic test equipment like a signal generator and voltmeter, while FM radio alignment is more complicated. The author and OVRC are not responsible for any damage or injury caused by executing these procedures. Jun 17, 2008 · Alignment Procedure 2 Aligning an AA5 Radio This section provides a General Procedure which in broad outline is applicable to all superheterodyne receivers. We would like to show you a description here but the site won’t allow us. At the bottom of the band, we get: f LO(MIN) f c f IF 88. Jan 3, 2020 · you would need a frequency counter, an RF generator (preferably with digital input controls like an HP) to do an alignment on the radio. Adjust L5 for best tone from speaker D. Equally Feb 11, 2019 · How to use a sweep generator and align a FM radio with it. Connect your output meter across the speaker terminals. You may begin by Monitoring ( Oscilloscope Probe ) the 19 KHz pilot FM Stereo Signal. I used the "max. The entire adjustment procedure, whether applied to a table model receiver or a large console, is called receiver alignment. Maybe OK for old mono radios and such, but for better modern tuners, you need a proper FM MPX generator - ST-1000A, VP-8174A, VP-8175A, etc. This will ensure top reception. Apr 27, 2014 · Guess we'll have to do this alignment from stations also. FM alignment : Page 1 of 2 [ 22 posts ] Go to page 1, Don't touch the FM IF and detector unless you know what you are doing. but is included in the fm alignment procedure. FM mode testing : Coil adjustment:Before adjust power,L20、L16 move to corresponding position as the sample,install J3、J4 jumper May 7, 2004 · Sometimes this screw is plastic, sometimes it's metal, but it's always the farthest from the tuning wheel. ( Clarifier Center ) 4. So this same relationship will be applied at bottom and top of the FM broadcast band. My signal generator has a generic procedure for aligning FM. 2: CH: 19 Band: C Mode: RX AM/FM Clarifier: Center: L13: Connect Oscilloscope to TP3. Aug 9, 2020 · Is there a procedure here for a poor man's FM alignment, that is, using FM stations at the ends of the dial to do some rudimentary alignment? I'm about to button up a 2230 and thought I'd try to dial it in. May 19, 2014 · You may find that alignment procedures contain errors or omissions, assume various bits of knowledge that you may not have, and may not be the best way to do the job. 1V: 3: MODE: RX FM: CHECK: Connect the Frequency Counter to Ant. The test, alignment, and troubleshooting of a conventional AM/FM radio is a fundamental skill for any electronic technician. All times are UTC . We’ll begin with AM radio alignment which is the simpler of the two. I wanted an FM transmitter. 6925 MHz ± 10Hz. 4 Additional Instructions on Receiver Alignment. Again faced with a lack of funds I used a radio. Feb 29, 2020 · This is a more detailed continuation of aligning an FM radio with an oscilloscope and sweep generator. Connect Oscilloscope to TP2 (lead of R79). FM Multiplex Alignment The scope was connected to test point 401, the output of the 38 kHz doubler. Find your strongest local FM Radio Station and Tune for the highest Amplitude 19 KHz pilot sine wave in the front section of the FM Multiplexer. Nov 21, 2021 · I flushed it out with 100% IPA, blew it out with canned air, and let the radio warm up for a couple of hours, and ran the alignment several times again. Added a variactor diode to the local oscillator and fed it with and audio signal. the procedure for both is with the use of a Jewell 560 oscillator. There is no deviation Episode 758Using the TinySA spectrum analyzer to align a radio. It's a bit long, but does show a worse case alignment Aug 18, 2015 · Well Don, I am 50 years in the audio business as they call it and there is nothing magic about aligning a tuner. Procedure; 1: MODE: TX FM: L702: Connect Oscilloscope to TP1 and adjust for 4,5V +/- 0. 02uF capacitor – I used a BK Precision 4040 Go To RadioMods CB Radio Simulator software page. Set squelch knob fully clockwise 3. It should be directly above the FM gang. It's as if the receiver is TRYING to give me FM stereo, but for some reason cannot. 2 MHz (no modulation), connected to mixer input through 0. Alignment is the process of adjusting the radio's tuned circuits so stations come in loud, clear, and ideally at or near the correct numbers on the dial. Antique Radio Forums Index » Category » Electrical/Mechanical Repair and Restoration. Fortunately, this is still well within the range of alignment. and 1Khz audio 5. STEP CONDITION ADJUSTMENT REMARKS OF ADJUSTMENT RT204 CCW Check 0,65A±10mA on the amperemeter Channel 20 RT205 CCW TX mode without Apr 12, 2015 · After a long struggle to get everything setup, I finally complete the alignment of the FM IF strip with a good result. This radio is adjusted by setting personality parameters stored in the radio's computer memory. 6300 Transmitter Alignment: 1. Displays negative input voltage from the bottom of the plot area. 7), which you can do with known local stations instead. 2 kHz Dev. Aligning the Radio. Transmit a consistent, steady, audio tone on a stable, known RF frequency into a radio receiver. 5 CB Transmitter Alignment Page 5 29-LX ALIGNMENT REVISION: 00 ENG-29-LX-08 Alignment of WX receiver portion. Both serve the essential purpose of aligning your vehicle’s wheels, but they target different sets of wheels and are suitable for varying vehicle configurations. QUESTION: What procedure(s) do I need to do to align the FM tuner so Basic Programming Procedures Owners Manual Factory Service Manual Page 1-1 to 5-4 Page 7-1 to 7-13 Page 8-1 to 8-13 Page 10-1 to 11-8. That can and does cause reduced performance of the radio. 240MHz Frequency Alignment: Test Point: C406 (0 ohm) Clarifier must be at center position Adjust T18 (ST745) to attain frequency reading of 10. Mod. Those are the smaller of the gangs. Sep 17, 2023 · AFAIK with a typical FM radio only dial alignment (getting the LO to track the dial) needs a signal higher than the IF (usually 10. Therefore, all radio alignment procedures require the use Feb 4, 2004 · GE SuperRadio 1. VR7: Spurious Emission to minimum. I’m not familiar with it, but some here suggest using a small fm transmitter like the type you would connect an mp3 player to so you can transmit the signal to an FM receiver. A predetermined frequency signal is applied at the radio frequency input, or antenna connection, of the receiver being aligned. D: Dummy load ( 8 ohm, 5 watts, resistive. A typical alignment procedure known in the prior art is as follows. 335 to 28. off. The procedure is presented in step by step manner, along with the purpose and goals of each step. We will be using the Sencore SG165 and the EICO 232 VTVM along with my signal generator to adjus. 3 Aligning Flat-Topped High-Fidelity Receivers. When you have completed one section of the alignment take a deep breath, pause, and do it Feb 18, 2021 · By the way, if I can successfully align an old AM radio with the tinySA as I described, I plan to write and article about it for the Southern California Antique Radio Society (SCARS) Gazette. Use the minimum possible signal generator output for the AM alignment so that the AGC doesn't mask the changes is level. 6 MHz falls within the aviation band. VR4: SSG: 40dB (50uV) Adjust "9" just light on: 4: AM No Mod. 2~11. Use the mod meter or oscilloscope with RF sampler [85%]. Mode 3 “FM IF (+) MHz” – FM IF alignment. Alignment procedure. Jul 12, 2014 · CB Radio PLL List . Jun 22, 2021 · I know this procedure as I built my own FM receiver in the seventies. Radio frequency (RF) alignment is also known as tracking. A separate parts list will be shown for the FM radio after you have completed the AM radio. "Complete Instructions for Adjusting All Philco Radio Receivers," Philco, 1935. - Connect DVM to TP-1 and adjust T-13 for 3. 9 With the mode selector still on AM, re-connect 1 kHz audio the generator to radio and key transmitter. The line frequency modulation drives the generator frequency sweep at the same time line frequency voltage is connected to the analog oscilloscope 'X' input in X-Y mode To use a digital generator and scope, don't use X-Y. In this series I will go over ways of doing an alignment. Basically, the instructions assume you know what's common in the field of radio servicing. The unit is recapped, I've repaired a number of the IF cans that had SMD, and the unit is performing ok, but needs an alignment. FM alignment : Page 1 of 2 [ 22 posts ] Go to page 1, /, . 8MHz And at the top of the band: f LO f c f IF 107. Covers 1928 through 1935 models. 9000 Mhz. 5 kHz. 1U – 120 to 200mV CH. Objective of Alignment 1. Getting it to peak at 106MHz required creeping the generator (HP-8567B) up a couple of MHz at a time, and then adjusting TC-4 to get the dial freq corrected. You post has reminded me of another thing that I did. Our panelist Bob says, "This one is the mother lode for the FM tuner fan who wants to understand and service modern FM circuits (not including digital tuners, though). I got AM and FM (mono) going pretty good. Adjust L13 for maximum reading on Oscilloscope. because of the PLL circuitry and the fact that it's an SSB radio AND a transceiver, it's a bit more involved than aligning it like an AM/FM receiver. 515-27. The second step in both don't appear to match what my radio has or is giving me at least. Nov 3, 2009 · The only lines of the alignment procedure I don't really understand read "Modulate the FM SG with stereo composite signal consisting only of subchannel signal (of course a pilot signal must be included)" "Adjust the trimming resistor R301 for maximum and same separation in both channels. L1 L2 L3 L4 L5 L6: Alignment of sensitivity. FM Stereo Decoder Circuit Analysis 20. Return to Top of Page RCI-2980 Receiver Alignment: 1. 7MHz 98. Figure 0. VR2: Alignment of Squelch. They make assumptions about things you know, but often don't. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Set Squelsch to maximum. Alignment Procedure for the Motorola Micor UHF RF & IF Board Eric J. Adjust all compensating condensers so that each resonant circuit is precisely tuned to the known frequency. 405 MHz Band: B Display: 40 2. Troubleshooting FM Stereo Receivers. May 19, 2014 · If something doesn't make sense, give it real thought, FM alignment instructions are famous for being flat out wrong. 6975 MHz ± 10Hz. 8 v. C. PLL ALIGNMENT: VCO (Convert the unit to Full Band Mode: Code 3) CH. 6MHz 118. Feb 22, 2023 · That's exactly what the tuning eye is using. There are two basic types of alignment. Adjust VR2 so that the squelch just breaks. FM is different. Confirm 2 V on CH 1 Band A. Then, using an instrument to monitor the results, the IF Nov 6, 2009 · Learn to Align your vintage tube radios! Ever wondered why your old radio just doesn't sound as good as it could? You've tested the tubes and changed all th The alignment instructions that came with the 70 covers both the 70 and the 90. C: Oscilloscope. If you are not familiar with proper procedures for handling these voltages, do not attempt any of these procedures. Apr 10, 2019 · Alignment usually means to turn various built-in adjustable components to put the equipment back to factory specs. The AM/FM Radio project is divided into two parts, the AM Radio Section and the FM Radio Section. FM SENSITIVITY ALIGNMENT 1. 3: CH: 19 Band: C Mode: RX AM/FM Preset to: Adjustment: Remarks: 1: L101, L104, L113, L115, and L105: Alignment of sensitivity Adjust coils for maximum reading of the AF VTVM. Dec 2, 2013 · This is part 1 of AM and FM alignment. Displays a single S-curve (SS Preset to: Adjustment: Remarks: 1: L101, L104, L113, L115, and L105: Alignment of sensitivity Adjust coils for maximum reading of the AF VTVM. service the ORION VHF Dual Bandwidth two-way FM radio. 10 Put the mode selector on FM. Finding a repair shop that really knew how to do the job was (and perhaps still is) all but impossible, even though many shops had the proper, or at least usable equipment. FM alignment : Page 1 of 2 [ 22 posts ] Go to page 1, Aug 30, 2012 · if this does not explain sufficiently, both the language gap and your understanding of FM radio demand that you take it to a tech who does FM radio alignments, or perhaps a radio amateur (ham) who builds his own equipment. Is the Sencore ST-165 really a must have for the final FM MPX steps? Is there a lower cost option assuming you already have a HP8657 or another AM/FM signal generator? Aug 27, 2013 · Honestly Eric, you really don't need a sweep generator for a proper alignment of a 40's or 50's FM radio. Adjust RF signal generator to 260 kc, and dial position on radio to 55. FM mode. If the manufacturer's alignment procedure is available, it should be followed rather than the general procedure. 1. 4 5 " 67 1 8) 9: ; 4 <=>62?@ abcdef4g h i j@ . I use the spectrum analyzer function and the RF generator function of the TinySABe a Patron:h Procedure; 1: MODE: TX FM: L702: Connect Oscilloscope to TP1 and adjust for 4,5V +/- 0. 005 (including the normal low,mid and high bands of 26. Page 15: Alignment CHAPTER 4 DX 959 ALIGNMENT 4. Jun 17, 2021 · Manufacturer's alignment procedures are often riddled with errors or translation problems. 855), that is a total of 167 channels ! I can also make a custom board upon request which will give whatever frequency range you want (within the limits of the radio). if you have access to the test equipment. Equipment required: A: Signal generator B: AC voltmeter. You need to understand the basic theory and practice on some dumpster units before undertaking anything serious. - Connect Scope to TP-2. Interestingly, the last time the "FM Stereo" light worked, I was dialing in a station, the light came on for half a second, then went out. I show the connections and controls on the EICO 369 and briefly the Wavetek 1080 and He Oct 24, 2022 · The more complex sets simply have more adjustments and, where FM or TV is provided, may require slightly different techniques for adjustment. I have a set of the Riders troubleshooters manuals and for most radios Nostalgia Air is fine but Chucks packages are hard to beat. 1MHz 10. 3: AM SSG 46dB No Mod. Set transceiver to 27. Principles of FM Stereo 19. While these radios would certainly have peaked up perfectly when they were brand new, age-related changes in the coils and adjustments can make this part a little more Set radio to CH 1 LSB TX mode, connect frequency counter the cathode side of D62, and short collector to emitter of TR31. Plug in CW key, disconnect Mic. Aug 21, 2023 · When it comes to wheel alignment, there are two primary types that vehicle owners should be aware of: front end alignment and four-wheel alignment. I owned a 2970DX for many years and I found it was the perfect radio for talking DX on SSB. Have spare tuner boards, an assortment of slugs on hand as well- i've seen a lot of broken IF tuning coil slugs as well. The local oscillator is alignment procedure of 18ws2 revision: 00 eng-18ws2-08 Page: 6 OF 6 Print date: 06-4-10 2. The knobs are pretty self explanatory - marker is adjusted to put a "blip" right at 10. Page 2 3. Adjust L12 for 6 V +/- 0. 6950 MHz ± 20Hz. - Set the radio to 28. With the very reasonable price of the tinySA, that would likely get a lot more users. Page 1 AR-3300 & AR-3500 Alignment Procedures SYNTHESIZER 1. -- Scott Richardson AA6U Jun 20, 2017 · Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Nov 24, 2012 · This model has the built in FM stereo multiplex. "Aligning Philco Receivers," John F. I’ll also briefly mention TV alignment and demonstrate the use of a signal generator with a wobbulator function and, if time permits, the use of a spectrum analyser. Mode 4 “FM SS (±) MHz” – FM detector alignment. there is too great of a language gap to teach the highly intricate FM radio theory and FM radio alignment procedures. AM Radio Alignment - RF Radiated signal (not directly connected to radio) Page 2 The AM/FM Radio project is divided into two parts, the AM Radio Section and the FM Radio Section. This two-part series is a Note:After finish above alignment, be sure to install the shield over the T13、T14 to ensure rest alignment. Here’s how: Sep 3, 2021 · So is a distortion meter optional? He also seems to use his HP 8657 AM/FM signal generator coupled to an audio signal generator for most AM and FM mono alignment. Here's a brief look at aligning an AM radio visually using a sweep generator. IIRC you really need an oscilloscope too for hifi FM stereo type stuff, any old analog scope will do for that though. 405 MHz /- 20 Hz The finished product is shown above. Modifications Covering the Expanded AM Band. The manufacturer's alignment instructions usually assumed the service tech did not have a sweep generator and usually gave a procedure using a common AM generator. Sweep generators (& RF signal generators meant specifically for radio alignment) are typically specified in either dBm or dBuV. 1 AM Receiver Alignment Using AM Signal Generator. Procedure; 1: CH: 40 Band: E Mode: RX AM Clarifier: Center: L12: Connect DC Voltmeter to TP2 ( R122). Intermediate Frequency (IF) Alignment. 8 VDC 1. Sep 28, 2023 · FM Discriminator Sweep Alignment (Sansui 2000 example): Tune to a quiet spot on the dial, Volume to minimum, FM Mono, Muting off Sweep generator set for 10. Included are disassembly procedures, alignment procedures and troubleshooting information (see Table of Contents). 38 kHz signal 1436 Nov 4, 2012 · Trying to follow the alignment procedure in the service manual for the Tristar 747, but also looking at the Secret CB (Vol 19) procedure as well. LSB OSC: Set radio to LSB TX mode, modulation off, connect frequency counter to TP5. Proper alignment of the FM section requires several pieces of high quality test equipment and plenty of experience. In Part 2, I’ll describe sweep alignment procedures for AM and FM radios and give an actual example of each. Thread starter justtis; Start date Feb 4, 2004; Well, it's a pretty standard AM/FM radio, so general alignment instructions Dec 2, 2020 · Stereo modulation is required for separation and pilot adjustments. It then gives detailed steps for preliminary setup, adjusting the IF transformers to the intermediate frequency, setting the oscillator dial scale, and providing an example alignment procedure Nov 5, 2016 · After reviewing the sm the procedure for mpx alignment is not included in adj. Abstract This article describes techniques for the alignment of AM and short-wave superheterodyne receivers, with 16. VR1: Alignment of S-meter. This completes the PLL alignment procedure. 240MHz. Grabowski, KH6CQ District Emergency Coordinator, Hawaii ARES The Motorola Micor series base and mobile 2-way radios are some of the most popular used by amateur radio operators. AC Voltmeter: VR9: 200mV Sine Wave: Checking FM Modulation: Set radio to FM TX mode. 4kHz +/- 1kHz Essentially, an alignment is using radio frequency or “RF” generator to send a test intermediate frequency into the radio circuit. L17 L2 L6 L7 L11 L12 L13: Adjust for maximum reading on the AF VTVM: 2: FM 1. If you want a more in-depth treatment of radio alignment, you might consider my Amazon book, Vintage Radio Alignment From Scratch. ALIGNMENT PROCEDURES PLL Alignment Transmitter Alignment Receiver Alignment. Feb 22, 2013 · After a considerable amount of time and numerous iterations using the alignment procedures in the service manual, I think I've got the AM and FM channels better aligned than they were when I received this unit. 0 REQUIRED TEST EQUIPMENT DC Power Supply (13. 2: AM SSG 66dB 1 kHz Mod. Equally Go To RadioMods CB Radio Simulator software page. Adjust L23 to 10. Procedure; 1: AM SSG 40dB 1 kHz Mod. I have not found those settings out of alignment much at all in doing about 15 alignments. Therefore, all radio alignment procedures require the use Page 2 The AM/FM Radio project is divided into two parts, the AM Radio Section and the FM Radio Section. 6. 000MHz, CW mode. Since they give a positive number - 60dB, not -60dB - you can assume they mean dBuV. Included in your kit is a special device called a “magic wand” Page 28 ANTENNA ALIGNMENT Tune the radio for a station around 600kHz service the ORION 800 MHz two-way FM mobile radio. Preliminary arrangements should be made, and special precautions are taken either for intermediate frequency (IF) alignment or the radio frequency (RF) alignment. Aug 19, 2022 · Here's my question: the SWG165 manual, under the FM IF alignment procedure says the following when setting up the SG165 Detector to Scope output, and I quote "turn the oscilloscope horizontal frequency switch to the 60 cycle line switch position, and adjust the scope's line sweep phase control for a pattern with no indication of foldover. - Set radio to 29. 3. What is Alignment? Alignment is the process of adjusting the IF and RF circuits for best reception (sensitivity, selectivity and absence of whistles) and accurate indication of the frequency/wavelength on the tuning scale. 1 V on DC Voltmeter. The 3 stages ahead of this are 19 kHz amplifiers and the 19 kHz to 38 kHz doubler, so alignment is simply adjusting all 4 coils for maximum signal. Jan 9, 2024 · It's built and I am receiving stations, but I went through the alignment procedure, and I'm not getting any signals on the scope and the procedure for manual alignment doesn't seem to make any sense. Mar 25, 2020 · Operational Alignment of FM Multiplexer. AM, No Mod. Best part is you don't need an FM signal generator or a sweep generator. But when I switch to FM Stereo, the same station which sounds clear on mono, is out of tune in Stereo. The service manual has the instrument alignment procedure. Has been reprinted in the past, but a quick look at the Radio Daze and AES sites indicated neither carries it. 0. Connect RF signal generator clip to grid of 1st detector and the ground clip to the chassis. Rider, 1937. Use normal Y-T display mode. If you have a multi-band radio you may need to repeat steps 2 and 3 with each band. Failure to operate at higher frequencies is often power supply or decoupling/electrolytic capacitor related on a transistor set, especially if the 88MHz to 95MHz part of the scale is reasonably correct. Dec 6, 2008 · I have abbreviated the alignment instructions I got from the Riders manual below: 1) Disconnect the grid clip to the 1st detector. 10. Troubleshooting AM-FM Receivers 18. We are working every day to make sure our community is the best Radio Hobbyist's site. Jul 13, 2022 · The current device on the bench is an AM/FM Zenith J733 tube radio, built in May 1952. Ascertain the degree of this tuning (or “alignment”) by measuring the AC voltage at the speaker. The PLL or Phase Locked Loop, is the technology that transformed radio transceiver construction from relying on banks of crystals being mixed to generate the operating frequencies. Some 4-5 gang tuners will be FM/FM/AM/FM/AM/FM and so on. This completes this stage of the alignment procedure. CW TX: Set radio to 28. 2 AM Receiver Alignment Using FM Signal Generator. jack AM/FM Radio Test and Alignment Application Note The test, alignment, and troubleshooting of a conventional AM/FM radio is a fundamental skill for any electronic technician. Included are disassembly procedures, alignment procedures, and troubleshooting information (see Table of Contents). Set radio to Fr Pool 1, CH 1 AM TX mode, connect frequency counter to TP5. 7 MHz center frequency. There is no deviation service the ORION 900 MHz two-way FM mobile radio. jack. 1V: 2: MODE: RX FM: L701: Connect Oscilloscope to TP1 and adjust for 4,5V +/- 0. These tasks, whether performed as a classroom exercise or in a commercial repair shop, require a good working grasp of DC and AC electronic basics and RF behavior. SQUELCH ALIGNMENT 1. ) E: DC power supply ( 13. The AM band was expanded to 1700 kHz after the SR2 was manufactured. voltage/zero voltage" basic method to adjust the last "can" before the ratio detector tube (6BN8) and got the FM mono going very good. With Mic gain at maximum, adjust VR14 for 90% modulation. (During this step, set the S. Adjust: T 718, T 719, T 720, T 721, T 722, T 723 to obtain maximum indication on VTVM 4. The following is ONE of the methods we employ during the FM alignment procedure. 1 ALIGNMENT PROCEDURES Apr 17, 2016 · But my experience has shown that most alignment issues are with the Front end. Adjust VR1 so that "9" LCD just lights on Login Register Hello Guest, Please feel free to join us! There are many more parts of the Phorum that only members can see. Adjust coils for maximum reading on the AF VTVM. AF signal 30mV, 1kHz to microphone. 40J – 5 to 6 Volts Align T14 (ST306), Test Point: TP3 10. LCD Nov 5, 2013 · Most FM tuners are rock solid, sometimes chip's and transistors pop - I'd say repair is 70% alignment and 30% mechanical/electronics. That was then and this is now. Refer to step 3 for radio setup 2. m = 4' n ,o , p f4qr . 5W (2v/8ohm)). Procedure; 1: TX FM Band C Channel 20: L16: Adjust for maximum RF Output: 2: TX FM Band C Channel 20: RT5: Adjust for 4 Watt RF Output: 3: TX AM Band C Channel 20: RT4: Adjust for 4 Watt RF Output: 4: TX FM Band C Channel 20: RT3: Adjust for LED "7" on RF Output Meter: 5: TX FM Band C Channel 20: RT6: Connect 100ohm Dummy Load to Ant. yo00 Active Member. I had previously aligned the FM section using only a signal generator and voltmeter, following the Sams Photofact procedure. 0000 Mhz. Adjust T-12 for Max in AM mode. It is termed the radio frequency (RF) alignment. 5 FM Receiver Alignment. attenuator so that the standard output is less than 0. Cobra 150GTL (PFM-0089A-BB) Transmitter Alignment Procedure 1. Checking alignment with my sweep instrument, I saw immediately why the radio's tuning was slightly off station and the sound distorted. G. 7MHz 118. 5-2 years of aligning junkers (depends on how often you can do it) before you have enough knowledge and confidence to tackle the better units. Apr 25, 2018 #1 Antique Radio Forums Index » Category » Electrical/Mechanical Repair and Restoration. Oct 22, 2023 · Set radio to USB TX mode, modulation off, short TP6 to ground, connect frequency counter the TP5. Adjust L21 to 10. k l . For FM stereo an FM stereo signal generator is recommend. I think I spent an hour setting up fo We would like to show you a description here but the site won’t allow us. This is necessary because as some electronic components age, they change in value over time. TX Power: Set radio to Fr Pool 2, CH 19 AM TX mode, connect the "short PCB" to TP7, TP8, and TP9, connect RF power meter to antenna jack, Set RF power fully Page 27 AM FINAL ALIGNMENTS There are two different AM alignment procedures. . I did a couple of Pioneer receivers with a procedure found in that forum and they turned out well. If you have a 3 gang tuner it will be FM/AM/FM/AM/FM again. Page 8 ALIGNMENT VCO/PLL TR 302 TP 600 Q417 TP 303 RT 301 TP 305 TP 304 Page 9 ALIGNMENT TRANSMITTER - Alignment procedure (13,8V/27,6V) -Connect a DC amperemeter between the power supply and the transceiver. Most of the German made AM/FM radios have alignment instructions on how to use this method. 4 )s 7t@ au ,v@ w 4 x ,y v z # [ \ ] >8 ^_ ,& ` 0 ab / a. Therefore, all radio alignment procedures require the use Apr 25, 2018 · Marantz Receiver 22xx and 2325 fm alignment. Jul 10, 2011 · To do a proper alignment you need the proper test equipment. Oct 15, 2021 · Hopefully this suggests, like prcguy says, that I only need to align the TCXO master osc. Connect Scope to Antenna Connector. Next, monitor the Frequency Doubler Circuit - Output is 38 KHz. Adjust L20 to 10. Test Equipment Connection: Connect RF power meter VTVM and oscilloscope to antenna jack 3. 9MHz 10. 5. 7 MHz, Width controls the difference between the lowest and highest frequencies of the oscillator (+/- a couple hundred KHz max) and level adjusts the output of the generator to suit the circuit under test. The nice thing about the SG-165 is that the manual has reasonably comprehensive general alignment instructions that you can fall back on. Used for FM IF alignment. L16: Adjust for maximum reading on the AF VTVM: 3: AM No Mod. ,c@ d e )f What am I actually doing when I "align" a radio? What is the reason to do an alignment? If you watch the videos, and hear the signal getting stronger and RCI-2970N2 10 Meter AM/FM/SSB Export Radio Review What do you get when you take one of the most popular SSB 10 meter radio lines (2950DX/2970DX) and add more power? The new RCI-2970 N2. doesn't read like very difficult procedures as the adjustment points & instructions are very well spelled out. Adjust L19 to 10. The YouTube AR8600 Mk2 SSB alignment procedure is interesting but a bit misleading as its adjusting the 455KHz IF to compensate for the TCXO being off freq, I think although the YouTuber does say that he will probably do a full alignment at a later stage. On a 40 channel radio it will give coverage from 26. 2Amp. Displays positive input voltage from the bottom of the plot area. VR2: SSG: 66dB (1mV) Just apper AF level: 5: USB No Mod. DO NOT OPEN the bags listed for the FM radio. Here's a look at how to align a vintage FM radio using a sweep generator and scope. Inject 1000uv 30% modulation at 1Khz tone 4. The PCB in this radio is almost identical to the Grant (PC-409) and the Madison (PC-411) and it can be used for comparisons Nov 4, 2006 · You have a few choices when it comes to alignment info. - Adjust T-1, T-2 & T-3 for max AF output ( output of Signal For better oscillator frequency alignment without a counter, connect the audio to your computer sound card and follow this ATS-909 alignment procedure and refer to the ATS-909 circuit board images and alignment pectrograms. Jan 8, 2021 · CC Radio 3 and CC RADIO-2E CRANE AM/FM Radio Auto Alignment Procedure Important!!! I also recommend you perform the Auto Alignment Procedure as described in the manual. 0 1 234 . vdnxmi azlwt hgclcyk wylclx gnrxbsv jhimec rjzaaql jsobl omrqi oerfs