The Kenwood TS-940S is a serious radio for the serious operator. Post by les-2e0dyy » 06 Oct 2016, 17:06. The primary reason for this was apparently noise, the Kenwood fans are not designed to limit blade or motor noise. Web. TS-940S, provided the input impedance of the transmis- sion line is not outside the capability of the. By no means would I purchase one based on the serial number though. LEGENDARY Kenwood TS-940S HF Transceiver with Original Box - Please Read - NICE! $675. make sure if you do this that you ground yorself so any static on your body is cleared. Web. com Home Manufacturers Kenwood TS-940S Kenwood TS-940S Desktop Shortwave Transceiver Specs Manuals (3) Reviews (1) Prices (3) Compare Add a review Add to my shack Login or Register to upload images Find Kenwood TS-940S rigs and spare parts on eBay Find the Kenwood TS-940S on Amazon. . A number of suggestions have been put forward to cure the fault. Unplug all external radio connections . SERVICE BULLETIN. It works as well as 8-9 mill numbers I've had, maybe better. And other times it takes a station with a 20db-over signal to move the s-meter. The ALC alignment procedure in the Kenwood TS-940 Service Manual is seriously flawed. The primary reason for this was apparently noise, the Kenwood fans are not designed to limit blade or motor noise. Dec 16, 2021. apparently well. RE: TS940 antenna tuner stopped working - HELP. Manufactured in 1986 this transceiver was the top of the line Kenwood radio until it was usurped by the TS950DX. kenwood ts-940 sql problem. This is the 1st TS-940S that I could observe and analyzein detail its circuits. used in the stock TS-940S introduces both high frequency and low frequency limitations do to the original caps used. If it is found to be intermittent, remove the socket and solder the ROM directly to the board. com Warranty Returns Policy Disclaimer K6IOK Repeaters More. com Warranty Returns Policy Disclaimer K6IOK Repeaters More. Not sure if you resolved your particular PLL issue, but I was successful in tracking down the PLL issue with my TS-940 after much research. The TS-940 can be very intimidating when the covers are removed and one looks in. Not sure if you resolved your particular PLL issue, but I was successful in tracking down the PLL issue with my TS-940 after much research. And other times it takes a station with a 20db-over signal to move the s-meter. Kenwood TS-940S, TS-930S Repair, Modification, and Operation kw-ts940s@groups. Web. But would purchase it on how well it worked now. I recently picked up the following Kenwood equipment for an extremely. Move the 15A DC Protection Fuse off the AVR board to the location ahead of the power transistors for total voltage cut off when the fuse blows. Unfortunately, this is rarely the case. Kenwood TS-940S, TS-930S Repair, Modification, and Operation kw-ts940s@groups. 28K subscribers Lots more to come in this series. We will give it a try!. The Kenwood TS 940 is a dynamic radio transceiver for the serious amateur radio. Here's a close-up showing the cracked (and immovable) core. Kenwood chose to use thermal detection on the PS and PA heat sinks to determine when to run the fans. If the timer switch is set to ON, the unit sometimes does not function even when. When joining the group, please consider introducing yourself with a post about your interests and/or experience with one (or more!) of these radios. Subscribe! My Subscriptions Subscriptions Help. Compudigital Industries has designed a full powe. The upgrade board has 2 switching power supplies on board for 9V and 5V. Jul 30, 2002. then you probably are dealing with the same problem. Connect the antenna and power cord then test the transceiver for normal operation. Sieh sie dir an. Sometimes, however, the. The shield has been removed for access. position, but only few days after I could focus and see that the cascode circuit It was also wrong in the PC board view pictures in the Service Manual. Kenwood made a lot of TS-940's. SERVICE MANUAL: http://www. Unplug all external radio connections . com Online Contact Form Amateur Radio Software Are you looking for software? CLICK HERE to Download Amateur Radio products software and support files not listed below. File information: File name: TS-940S_Service_manual. I picked up a, nice, used Kenwood TS-940S(with Antenna Tuner) HF rig to ply the lower frequency airwaves. Time required for this change is 1 hour or less. The symptoms, in my case, were a dead radio. 8 to 54 MHz Amateur Radio bands RX Frequency Ranges: 30 kHz to 60 MHz Modes: CW, SSB, FSK, PSK, AM, FM Output Power CW/SSB/FSK/PSK/FM (AM); 200 W (50 W) RF power is adjustable from 2 to 200 watts. momentarily displays then disappears. The procedure uses a fixed level of modulation input at the Mic connector, 1. Kenwood TS-940S Vintage Amateur and Military Radio. Re: Ts-940 All problems SOLVED. As I never heard about this problem, I decided to reveal it to the whole world. First, I put the radio (Kenwood TS940) in a cold basement to bring the temperature down to aprox. This is the 1st TS-940S that I could observe and analyze in detail. 76v ic9>pin3=1. (In large quantities, these motors are little different in price from brush type motors, but you aren't going to see that price break in small quantity purchases. 8v working ) con 2 pin5 (ul)=2. Ts-940 All problems SOLVED. This group is for both, and I mistakenly described the TS-930 wiring. When joining the group, please consider introducing yourself with a post about your interests and/or experience with one (or more!) of these radios. its circuits. The fan control logic in the Kenwood TS-930 and TS-940 is a very poor design. order intermodulation problems of the TS-940 at carrier offsets between . Put the covers back on the TS-940S and secure them with the 16 case screws. We will give it a try!. Post by les-2e0dyy » 06 Oct 2016, 17:06. When the 940 is up and running again, I will upgrade the 930 as well. SKU: UC06KM-B7 Category: Kenwood Tags: CAT, control, kenwood, programming, TS-940S. Mail this to a friend! Doug, I'd start by looking into the reverse-power-measuring circuit - to see if there's any reverse power being detected. Hello Everyone, I'm having a problem with my Kenwood TS-940S, in that I can. When I get below around 10 MHz (this varies) the dots appear. KENWOOD TS-700 2M All Mode Transceiver AM/FM/SSB/CW 10 Watt Vintage - EUR 200,00. This is probably the very same problem And if this happens you probably also lost some sensitivity to a similar problem in the receivermore about that later. The Kenwood TS-940S is the same as the TS-940SAT except without the automatic antenna tuner. hi all I am looking for advice I recently bought a kenwood ts-940s my problem is I cant sql. What are the key features of Kenwood TS 940?. Hello, I discovered an interesting problem recently with my TS-940S: it seems that the Low cut portion of the SSB Slope tuning no longer functions. Web. Payments: Credit, Debit Accept Also PayPal, Zelle. ZU VERKAUFEN! Einziges Problem: Ich habe das 12V/230V Stromversorgungskabel verbaselt. 951 (20-1-1989)Intermittent control or display problems that are difficult to correct with the reset procedure may be caused by a faulty ROM socket. When I turn it on, the freq. rar [preview TS-940S] Size: 1953 kB: Extension: Mfg:. Web. But would purchase it on how well it worked now. KENWOOD TS-940 PAGE. Feb 11, 1997 · TS-940 PLL Unlock repair hints. The TS940S along with other Kenwood transceivers are prone to a common fault - that of displaying a row of dots instead of a frequency readout. The best thing you can do at this point is a bit of troubleshooting of the signal path. This could happen to anyone that has the TS-940. I have one of these rigs that has a built in auto tuner in it (TS-940S/AT). Web. I just need to get rid of some stuff. You won't find an AVR board for sale new -- you should endeavor to fix the. Web. other transceivers or even the R-5000 receiver will have heard, or. The TS-940 has the ability to produce excessive drive to the PA, especially in the CW mode. Browse answered Kenwood TS-940SAT questions, problems & issues. Kenwood chose to use thermal detection on the PS and PA heat sinks to determine when to run the fans. This is a great radio with receiver specs comparing well with the top 5 receivers made today. Not sure if you resolved your particular PLL issue, but I was successful in tracking down the PLL issue with my TS-940 after much research. Really good thanks. Oops! Looks like we're having trouble connecting to our server. The primary reason for this was apparently noise, the Kenwood fans are not designed to limit blade or motor noise. TS-940 Instruction Manual - WB4HFN. The best thing you can do at this point is a bit of troubleshooting of the signal path. Some Common Problems and Solutions There are many facets to a Kenwwod Hybrid Transceiver. these radios. Web. Ts-940 All problems SOLVED. kenwood ts-940 sql problem. KENWOOD TS-700 2M All Mode Transceiver AM/FM/SSB/CW 10 Watt Vintage - EUR 200,00. Then consider turning off your radio and see if the lock is moved from its position. Operates 250 W PEP input on USB, LSB, CW, FM and FSK and. position, but only few days after I could focus and see that the cascode circuit It was also wrong in the PC board view pictures in the Service Manual. The problem Kenwood TS-440 is designed as a mobile transceiver. But instead of having a main board and a few other boards the 940 has many boards, 6 PLL circuits. Kenwood TS-940S. Es lässt sich problemlos 364146204004. The "AT" after the S is for Antenna Tuner. Move the 15A DC Protection Fuse off the AVR board to the location ahead of the power transistors for total voltage cut off when the fuse blows. #129 Kenwood TS 940 Low Receive The Radio Shop 22. Web. I apologize, the info I gave you about wiring was for the TS-930, not the TS-940. Web. I checked for the pin 2, pin 7 voltages on the 4 known IC's. When I was a young man in the late 80's I coveted the Kenwood TS-940. So once you locate the problem and narrow it down to one board it is not really that hard to repair. After several hours of searching and more sleepless nights I decided to start retuning the cores, something I usually never attempt unless the radio belonged to a CB-amateur. Although they had a few issue's on the earliest run's, all were fixable and as the serial numbers grew the issue's went away. When I turn it on, the freq. DOA - Dead on arrival - Cover Removed. Kenwood TS940 repair notes: Low power output and low sensitivity. The primary reason for this was apparently noise, the Kenwood fans are not designed to limit blade or motor noise. Cheers Dave-- 73s. Jun 06, 2004 · Professional Repairs/Restoration specializing on the Kenwood TS-940, TS-930 radios. The TS-940 is a triple conversion receiver design, so If you can hear a signal at all, the receive circuitry is working, but your sensitivity is low, which typically indicates the problem is right at the antenna input. there are three. higher breakdown voltage will help prevent this potential problem. 00EUR, Buy Now Low noise PLL loop amplifier for Kenwood TS940, 39. PLL PROBLEM. The only limitation is that your TS-940/850 should have an antenna that can handle the 3:1 Max SWORE. After reading the instructions and watching your videos, it's almost plug and play. 20 meterband TS 940 Power Supply Upgrade Part 1 #18 Kenwood TS 940 DOT on display Chasing down the rabbit hole Pt 1 Kenwood TS940S Computer kontrolle und Wasserfall / Control and Panadapter or you can build your own. If you are up to it and have good solder techniques, redo all of them when the board is out. Entdecke Geprüft Kenwood TS-570S SG Version up DRU-3A 500Hz CW Filter Transceiver Schinken in großer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung für viele Artikel!. Clint. it would loose lock wan the. Kenwood made a lot of TS-940's. de Doug KR2Q. Delivery time: Courier Europe 5 days, America 7 days, USA and Canada 5 days. 7MB) which is in PDF format. This is a terrible design and a common problem for. Web. Entdecke kenwood ts 940s Radio Tx Rx Om Ham Cb Apparato No Yaesu Icom Drake Collins in großer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung für viele Artikel!. He told me he had it serviced in 2015 by Kenwood in Virginia(?) on his way to Florida. 82v ic8>pin2=1. 34v (4. Trio- Kenwood has succeeded in achieving the highest. ; Seller assumes all responsibility for this listing. Web. apparently well. Post by les-2e0dyy » 06 Oct 2016, 17:06. 76v ic9>pin3=1. Kenwood TS-850 vs TS-940. I have for sale a Kenwood TS-940SAT. TS-940/850) and the PIEXX digital board, both for reliability, new functions such as main tuning knob control of RIT when dial is locked, and to be. I have a seven year old Kenwood TS-940S transceiver. Minor problems (fast clock, blown bulbs, etc) $550 or so. Entdecke Kenwood TS-940 S Amateurfunk Transceiver in großer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung für viele Artikel!. I bought a programing cable on EBay for my Kenwood TM-V71A. Web. This is a terrible design and a common problem for. DSP is excellent by 20th century standards, and it boasts that famous Kenwood sound on TX (150 watts) and RX. Jan 01, 2009 · TonyV225. 4SALE: TS-940,SP-940,SM-220, IF-232c. Kenwood TS-940SAT Almost everyone who owns a Kenwood TS-940, TS-440 and a few select other transceivers or even the R-5000 receiver will have heard, or experienced, the dreaded PLL wax potting curse. So once you locate the problem and narrow it down to one board it is not really that hard to repair. Kenwood roofing filter (XF1-A, XF1-B, L3-L5), when the TS-940 is set to FM mode. shows again even when rotating the dial. I have a problem with my TS-940 and was wondering if anyone else has had it. receive signals, but they are rather weak sounding and my s-meter does. The TS-440S also was known for the PLL not locking after time resulting in showing dots on the display. KENWOOD TS-940 PAGE Version 2:. Web. The primary reason for this was apparently noise, the Kenwood fans are not designed to limit blade or motor noise. 908 deal with two probable causes; low VCO voltage, and PLL voltage. Jun 06, 2004 · Professional Repairs/Restoration specializing on the Kenwood TS-940, TS-930 radios. Every possible function has been adopted to eliminate radio interference. sub-optimal, and picks up a lot of stray, random noise throughout. Web. The SM220 is nice and matches the 940 but a bit on the pricey side. Will I benefit from a filter with these problems ?. are on the PLL board - the other 2 are on the CAR board. kenwood TS-940S free download Ham radio, amateur radio, two way radio, cb radio, walkie talkie service manuals and repair information. I knew several other hams who had terrible problems with reliability with the power devices in the driver stage. The only limitation is that your TS-940/850 should have an antenna that can handle the 3:1 Max SWORE. Kenwood actually preplaced one ham's TS-940 with a TS-950 because of this issue. KENWOOD TS-940 PAGE Version 2:. As a final note, many have found the solder joints to be less then adequate on this particular Kenwood radio, with a high number of cold solder joints. I began to wonder last year why its Rx was weaker than the other Kenwood HF rigs or Icom. TS-940S erratic display. Support us on Patreon;. Kenwood chose to use thermal detection on the PS and PA heat sinks to determine when to run the fans. The most predictable reason behind it is that it is due to the lock loops being displaced from their position. If your looking for a great classic and are willing to spend 6-$800. After being a Ham for over 50 years, I have finally decided that one of the best transceivers ever made is the Kenwood TS-940. Well worth the investment. to fix q4 transistor, you may follow these steps: (1) unscrew the case screw supporter (2 screws) located on the metal splitter or holder between if unit and control unit; (2) unscrew the if unit or circuit board #x48-1430-00 (7 screws); (3) unplug or disconnect the gray wire from its socket on the right side (1 inch away) of 8. TS940 AVR Board Mani Page While tuning up the unit for use and getting the microphone squared away, Bob and I smelled hot electrons. it would loose lock wan the display would go blank. The TS-940 is a triple conversion receiver design, so If you can hear a signal at all, the receive circuitry is working, but your sensitivity is low, which typically indicates the problem is right at the antenna input. 37v not working (1. First suspect is always the power supply, in this case. I owned a TS-940 for a short period in 1992 which I judged as having significant AGC problems, particularly on CW with the fast AGC setting. Dec 31, 2017. See the FETs Q10 (RF Preamp RF Pream p 2SK125, N-FET, 25V, 0. The TS940S along with other Kenwood transceivers are prone to a common fault - that of displaying a row of dots instead of a. This shown in blue above. ts940 Repairing a Kenwood TS-940S I recently became the owner of my first Kenwood transceiver, a TS940A. One morning he turned it on and it was just dead. But stopping, the "dots" displayed and PLL not locking. Browse answered Kenwood TS-940SAT questions, problems & issues. A Compendium of Information - W3AFC. First I found the RF Preamp FET in a odd position, but only few days after I could focus and see that the cascode circuit was correct in the schematic diagram and wrong in the PC board. The "AT" after the S is for Antenna Tuner. The Kenwood TS 940 is a dynamic radio transceiver for the serious amateur radio. Digital A Board. By no means would I purchase one based on the serial number though. KC4UMO Buddy. ; eBay item number:192645328711 ; Last . In these pictures the FETs are in the wrong position. Web. 4Sale TS-940, SP-940, SM-220, IF-232c w/Digital Images. First I found the RF Preamp FET in a odd position, but only few days after I could focus and. Web. This is a Kenwood TK860G UHF 128 channel mobile radio. I will order the 940 upgrade kit in a couple of days. Web. not deflect to show their signal strengths. there are three. 15-30 MHz Tuning steps: Down to 10 Hz Frequency stability: ±10 ppm @ -10 to +50°C (14 to 122°F) Mode: AM / FM / SSB / CW / FSK Channels / memory management: 40 regular in 4 banks 4 program scan pairs RAM storage with battery backup. If that ckt is busted, and no rev power is measured, the tuner will likely think it's done as soon as. When operating the TS-940 in SSB/AM/FM or FSK Modes, it is advisable to set the MIC GAIN (FM MIC GAIN) or the PROCESSOR OUT controls to prevent get minimal ALC indication. 5K subscribers Subscribe 682 Share 30K views 5 years ago In this video we look at a TS-940 with low receive. I can assume that thousands of other TS-940S are also waiting to be corrected and perform. All were correct except IC 8. it would loose lock wan the. it would loose lock wan the display would go blank. This doesn't surprise me on a 20 year old rig. But would purchase it on how well it worked now. No AM operator should be without a basic scope. Almost everyone who owns a Kenwood TS-940, TS-440 and a few select. The TS-940 is a triple conversion receiver design, so If you can hear a signal at all, the receive circuitry is working, but your sensitivity is low, which typically indicates the problem is right at the antenna input. just need it gone threw, seems to have low power and it has fan problems. Kenwood chose to use thermal detection on the PS and PA heat sinks to determine when to run the fans. to 4:00 P. TS-940S-Repair TS-940S - Repair 2017 - 1 - 30 Document by David Lowrance AL5X I was gifted an older Kenwood TS-940S by an Elmer. The ALC alignment procedure in the Kenwood TS-940 Service Manual is seriously flawed. After reading the instructions and watching your videos, it's almost plug and play. Aug 1, 2015. When you complete your order, we will ship in 8 days. just need it gone threw, seems to have low power and it has fan problems. Kenwood actually preplaced one ham's TS-940 with a TS-950 because of this issue. The TS-940S is well known for having power supply issues. He picked it up on the way back. Performance upgrades. flmbokep, firey jr bfb
908 deal with two probable causes; low VCO voltage, and PLL voltage. . Kenwood ts940 problems
This is a terrible design and a common problem for. The TS-940 is a triple conversion receiver design, so If you can hear a signal at all, the receive circuitry is working, but your sensitivity is low, which typically indicates the problem is right at the antenna input. Jan 30, 2021. rar [preview TS-940S] Size: 1953 kB: Extension: Mfg:. Oct 27, 2022 · kenwood ts-940s serie708xxxx pll 50-2020-00 board ic19>pin2=4. The rig developed an issue shortly . Get free expert troubleshooting help, support & repair solutions for all Radio . 5 kHz audio tone at 5mV. Support us on Patreon;. This issue can easily be solved if you just warm up the loop lock panel. At the time Kenwood considered it their top of the line competition class HF radio until it was later surpassed by their newer model TS950DX. Sep 27, 2004. Kenwood made a lot of TS-940's. For example, each time you change the Menu No. I noticed >quickly, since the fan is audible. Kenwood software download [email protected] [email protected] Kenwood DOUBLE DIN SIZED CD/CASSETTE RECEIVER INSTRUCTION MANUAL DPX-4020/MH4 DPX-4020/PH4. sub-optimal, and picks up a lot of stray, random noise throughout. Manufactured in 1986 this transceiver was the top of the line Kenwood radio until it was usurped by the TS950DX. Not sure if you resolved your particular PLL issue, but I was successful in tracking down the PLL issue with my TS-940 after much research. A Compendium of Information - W3AFC. If that ckt is busted, and no rev power is measured, the tuner will likely think it's done as soon as. This is a terrible design and a common problem for. What we find appears to be. This could happen to anyone that has the TS-940. hi all I am looking for advice I recently bought a kenwood ts-940s my problem is I cant sql. Kenwood TS-940S. Rotating the knob CW does have any effect on either. ts940 Repairing a Kenwood TS-940S I recently became the owner of my first Kenwood transceiver, a TS940A. hi all I am looking for advice I recently bought a kenwood ts-940s my problem is I cant sql. Web. pdf Not sure if this may help or not. Every possible function has been adopted to eliminate radio interference. The main category is Kenwood TS-940S that is about Kenwood TS 940. of my particular radio (7 million s/n) solved the. Web. This is a great radio with receiver specs comparing well with the top 5 receivers made today. Web. kenwood ts-940 sql problem. FS: Kenwood SP-940 for TS-940. This shown in blue above. This is a special own stock item. When I turn it on, the freq. The rig developed an issue shortly . After being a Ham for over 50 years, I have finally decided that one of the best transceivers ever made is the Kenwood TS-940. I am using 2 of them. First, I put the radio (Kenwood TS940) in a cold basement to bring the temperature down to aprox. 4Sale TS-940, SP-940, SM-220, IF-232c w/Digital Images. io Topics Kenwood TS-940SAT with Low Output on Lower Bands Date 1 - 20 of 49 Kenwood TS-940SAT with Low Output on Lower Bands #transmit 1 - 20 of 49 1 2 3 Previous Topic Next Topic. ; Seller assumes all responsibility for this listing. RE: TS940 antenna tuner stopped working - HELP. 1A, 0. Web. Great price, Works Great. Looking for a qualified tech for the 940. 4K views 4 years ago Lots more to come in this series. TS940 antenna tuner stopped working - HELP - tips Forum at Contesting Online 1-2 of 2 messages Page 1 of 1 Page 1 of 1 Next Topic: prop pitch motor Previous Topic: filter Email Subscription You are not subscribed to this topic. The most predictable reason behind it is that it is due to the lock loops being displaced from their position. This image shows the old battery removed and the pins cleaned up for the replacement. 37v not working (1. The one that's got me asea is involved with PLL. sub-optimal, and picks up a lot of stray, random noise throughout the radio. I bought a Kenwood TS940S-AT. then you probably are dealing with the same problem. The fan control logic in the Kenwood TS-930 and TS-940 is a very poor design. Kenwood TS-440S (TS 440 S TS440S) mod for improved receive. The main category is Kenwood TS-940S that is about Kenwood TS 940. 2 GHz modules. Cheers Dave-- 73s. This doesn't surprise me on a 20 year old rig. Sometimes, however, the. Post by les-2e0dyy » 06 Oct 2016, 17:06. The Kenwood TS-930, while many years out of production and lacking many of the technology. In the case of the TS940 there are a total of 6 phase lock loops, any one of which could be out of lock and cause the 'DOT' problem. The TS-940 can be very intimidating when the covers are removed and one looks in. 37v not working (1. The rig seems to work (on receive, there is an unrelated problem on transmit) on the higher frequencies, LSB. N ow downloading free:kenwood TS-940S. Entdecke Geprüft Kenwood TS-570S SG Version up DRU-3A 500Hz CW Filter Transceiver Schinken in großer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung für viele Artikel!. 300" and the pin on the left (viewed from the. Quote: >I have the 940, and the power supply fan had stopped. The problem Kenwood TS-440 is designed as a mobile transceiver. Web. My radio was working apparently well. apparently well. I had the dot problem that would cut in and out similar to what most on here see when the PLL's are not balanced. When you complete your order, we will ship in 8 days. Kenwood TS-940S SPECIFICATIONS GENERAL Type: Amateur HF transceiver Frequency range: TX: 10-160 m + WARC RX:. Kenwood TS940 repair notes: Low power output and low sensitivity. Apr 10, 2001 · Hello Everyone, I'm having a problem with my Kenwood TS-940S, in that I can receive signals, but they are rather weak sounding and my s-meter does not deflect to show their signal strengths. Get free expert troubleshooting help, support & repair solutions for all Radio . Main Page Page Up. It won't work on USB at all. File information: File name: TS-940S_Service_manual. Web. The TS-940 is a triple conversion receiver design, so If you can hear a signal at all, the receive circuitry is working, but your sensitivity is low, which typically indicates the problem is right at the antenna input. The primary reason for this was apparently noise, the Kenwood fans are not designed to limit blade or motor noise. KENWOOD TS-940S/AT PLL Wax Woes: Almost everyone who owns a Kenwood TS-940, TS-440 and a few select other transceivers or even the R-5000 receiver will have heard, or experienced, the dreaded PLL wax potting curse. The TS-940 is a triple conversion receiver design, so If you can hear a signal at all, the receive circuitry is working, but your sensitivity is low, which typically indicates the problem is right at the antenna input. KENWOOD TS-940S Repair PART 1 5,809 views Mar 24, 2018 46 Dislike Share Save Radionut63 3. . Availability: Immediate. io Welcome to the TS-940S group! Here we discuss practicalities, frustrations, and joy of putting these transceivers and similar models TS-930S, TS-930SAT, and TS-940SAT back on the air, using them, optimizing their performance, and modifying them. 10v ic17>pin1=2. I obviously will not ship this. Kenwood TS-940SAT. 8v working ) con 2 pin5 (ul)=2. And other times it takes a station with a 20db-over signal to move the s-meter. KENWOOD TS-940S INSTRUCTION MANUAL Pdf Download. I am using 2 of them. DSP is excellent by 20th century standards, and it boasts that famous Kenwood sound on TX (150 watts) and RX. This is a terrible design and a common problem for. FS: TS-940 with SP 940. Web. 2)Mode 2. not deflect to show their signal strengths. This is probably the very same problem And if this happens you probably also lost some sensitivity to a similar problem in the receivermore about that later. The procedure uses a fixed level of modulation input at the Mic connector, 1. PLL unlock in the TS-940 has been a known problem. 4K views 4 years ago Lots more to come in this series. Kenwood TS-940S, TS-930S Repair, Modification, and Operation kw-ts940s@groups. Kenwood TS-940S, TS-930S Repair, Modification, and Operation kw-ts940s@groups. Post by les-2e0dyy » 06 Oct 2016, 17:06. So once you locate the problem and narrow it down to one board it is not really that hard to repair. io Topics Kenwood TS-940SAT with Low Output on Lower Bands Date 1 - 20 of 49 Kenwood TS-940SAT with Low Output on Lower Bands #transmit 1 - 20 of 49 1 2 3 Previous Topic Next Topic. to fix q4 transistor, you may follow these steps: (1) unscrew the case screw supporter (2 screws) located on the metal splitter or holder between if unit and control unit; (2) unscrew the if unit or circuit board #x48-1430-00 (7 screws); (3) unplug or disconnect the gray wire from its socket on the right side (1 inch away) of 8. This could happen to anyone that has the TS-940. Not sure if you resolved your particular PLL issue, but I was successful in tracking down the PLL issue with my TS-940 after much research. 00EUR, Buy Now Low noise PLL loop amplifier for Kenwood TS940, 39. When I press the bandswitch buttons, the freq. The TS-940 can be very intimidating when the covers are removed and one looks in. The symptoms, in my case, were a dead radio. The symptoms, in my case, were a dead radio. N ow downloading free:kenwood TS-940S. What we find appears to be lightning damage. kenwood ts-940 sql problem. by Brian Mileshos » Tue, 10 Apr 2001 05:07:44. Complete rebuilds from top to bottom, PLL and Power Supply repairs & updates, Replacement RF Drivers. As I never heard about this problem, I decided to reveal it to the whole world. . facebook photo downloader