Nice work Peter, most hams today wont or cant work on their own gear, whick is a great pity. That aspect of it to me is the most gratifying. TS940 and Kwm380 on the bench. 73!.
Hallo Peter, wieder eine tolle Arbeit bei deinen Reparaturarbeiten. Meine TS-50s schafften locker 180W-PEP. Um ein Überhitzen der Finals zu vermeiden, habe ich den Lüfter im Standby-Modus mit niedrigen Drehzahlen drehen lassen und mit steigender Temperatur während des Sendens mit höherer Geschwindigkeit betrieben. Diese Radios waren solide gebaut, um lange zu halten, aber viele von ihnen hatten Kühlkörperprobleme, selbst wenn sie vom Eigentümer nicht berührt / nicht modifiziert wurden. Schönen Sonntag & 73
On my TS-50 I had the very same problem - an oscillating audio amplifier. After replacing all the electrolytic caps, the fault persisted. Eventually I soldered a 100 nF cap parallel to C124, that cured that nasty sound. Since then, it works like a charm.
Nice exorcism of the evil crapacitors, causing the zombified victim to howl in pain. Really enjoyed the video Peter! The TS-50 is a brilliant radio and I wish I had not sold mine.
Seen a few of the videos of the TS-50 and really like how Kenwood designed them. That is one solid little radio, no wonder you like them. Cheers, VE3NAP
Hello Peter, again a great job on your repair work. My TS-50s did easily 180W-PEP. To prevent from overheating finals I made the Fan spinning on low rpms during standby mode and running higher speed with rising temperature while tx. Those radios were solid built to last but many of them had heatsink porblems even untouched / unmodified by the Owner. Happy sunday & 73 de Your Friend Uncle Guenter
Great job, as always, Peter. I don't think I've ever heard a radio crying out for help! Wow, first one! Can't believe all the 22 uF were bad. Must have been a bad batch. 73 from W Rusty Lane K9POW in eastern Tennessee
Thank you for the wonderful information. Very interesting. I have a TS 50 and I will now be able to identify what to replace if I have a similar problem. 73 N6PKT
Sunday morning, some time for myself: TRX Lab time. You know i like TS50, so it was a pleasure to watch another repair to save those oldies. I have a handy Sencore cap substitution station, it helps a lot for work like that, or tuning mic path for example. 73 de Olaf and stay healthy, Peter.
Ahh really had already a bit worries that all is fine...Yeah we both are ts50 fan boys..You was able to find a good working/condition substitution station? not easy these days.. 73 all the best
@@TRXLab Sorry Peter, hese days are quite busy, but be sure that i view all your vids, won´t miss a thing;-) You mentioned it: I bought 2 pcs from the states, one is working fine upt to 50µf, the rest is leaky. There are some odd tripple caps in it, it will have to spend a bunch of caps and time, but it is worth it. All caps are 450V rated, quite handy. I habe a small tester with ceramics for the audiopath. Perhabs i will send a pic from inside the sencor to you with E-Mail. 73!
ja kenne ich mit der Vollberschäftigung lol. Diese Sencore sind wirklich klasse von der Idee, nur leider sind die viel zu oft getoasted worden, oder wie du schon sagst diese komischen Elkos sind nicht mehr gut. Aber ich denke es ist eine gute Idee ein gut erhaltenes Exemplar zu kaufen und dann muss man halt neu machen. Auch die komische Aufteilung bei den Elkos hat mich immer gestört. Na ja, wenn genug Platz im Gehäuse ist, sollte man alles einzelne Elko aufbauen mit 450 Volt. Mir gefällt dieses konische parallelschalten nicht im Original. Auch die Drahtwiderstände sind kritisch wenn die verbranntt sind, da auch Sonderlösung. Komisch das wir so etwas hier nie gefunden haben. Auch König der ja ein wenig wie Sencore gearbeitet hat hatte soetwa nie im Programm. Da waen die Kollegen in den Staaten weit vorn damals...73 alles Gute
@@TRXLab Vollkommen richtig, die US Kleininstrumente und Werkzeuge waren viel zahlreicher. VTVM, S-Tracer, Cap Leakage Tester, R und C Dekaden...gabs bei uns so gut wie nicht, oder extrem schlecht...Wir konnten nur HighEnd gut. Eigentlich müsste man ,al wieder etwas entwickeln. Paul macht es ja, die kleinen Alltagshelfer. Bin schon neidisch auf Deinen C-Checker von Sencore (der neue). Aber Für 1000.- USD tausche ich lieber weiter auf Verdacht. Da müsste mal ein Schnäppchen kommen. LG an Dich,Peter. 73. Freue mich auf Part II der Restauration.
Excentent job Peter. Looks like you caught that one just in time. Everyone I get the pcb is already destroyed with makes the repair hard. Thanks for sharing my friend.
Another beautiful diagnose and repair , I knew it was capacitor problems from the beginning as I have owned 4 TS50's and all of them have leaky cap syndrome at some stage. What I didn't know was where to directly go as you did...... I would have just swapped out all caps as I have done before..... Thanks for a great start to the year Peter..... best regards from New Zealand
Nice work there Peter & love the explanations, camera angles & your reasoning why you carry out certain actions. Always a pleasure to watch and enjoy your videos & thanks heaps for sharing. Happy new year to you & all you family & loved ones
Great video as usual. I just wish I was close to you so you could re-cap my TS-50 before it has issues. Oh and fix my TS-930's vfo, and while your at it at least three other of my radio's that need some TLC! 73, N9XFX
Those electro SMD Caps do NOT hold up like the older caps back in the 70's , 80's and even the early 90's caps.... SMD's were getting really popular when I got out of the business in 1998........I buy Nichicon and Rubicon caps only , If I can use a old style cap and cut the leads short , then bend them sideways close to the board I will do that , MORE life from the cap like that .... GREAT video as always Mon Ami .....
Hi Peter fantastic video. You gave new life to the Kenwood T 50. As always you do an awesome job. Thank you for sharing the video it’s always a pleasure to watch you work, Most people were either leave it on the shelf in their closet or just get rid of the radio. Take care and stay safe. WD5ENH Steve
Hi Peter, after 33 secs of this vid I wanted to make this reaction. Whatever comes next, this one is epic already. You opening the vid with your enthusiasm with a look to you it being a kind schoolboy naughtyness, saying that this Kenwood having problems of getting turned on, well, EPIC!!! Have a great day :), enjoy winter over there in Austria. Greetings from the Netherlands!
Good morning. I enjoyed the whole video. I had this device which I unfortunately sold many years ago. I have wonderful memories, it is a wonderful radio. I love it!
As usual, nicely presented video from Peter. However I'm not sure that leaving the TX power about 50% higher than max is acceptable - I hope the owner was told about this in case he was unaware and later on cooked his finals because it was left set far too high. I feel there is a degree of responsibility with the technician to set important things to be as they should - if this rig had been mine I would have been grateful for it to be reset to the factory limit in case it ended up fried because I hadn't been told of its excess wattage.... I wonder what the TX signal was like for harmonics with the settings at 150% of design max... No ham known to me would run a rig set like this, we'd all be happier by far to have factory settings restored to a rig of unknown history - these are super little rigs when in fair order, but they're getting nearer the grave with every year that passes!
That's why it's good to know something about electronics because of something breaks you can probably more than likely fix it yourself and fix other people's electronics too I have a flat screen TV that I haven't gotten around to fixing yet because I've been so busy and haven't gotten around to buy a replacement parts from I tested and troubleshot the board and it's shorts all over that board to the point to where I said forget it I'll just order another motherboard but I haven't gotten around to doing it yet
Those SMD electrolytics are a real pain and cause all sorts of issues with older electronics. Very neat job Peter. It must have been difficult to get them out with all those plastic connectors so close. How did you remove them? All the best Graham
Yes fully agreed Graham it is a pain. You need a good hot tweezer like my Hakko and a good microscope . The procedure is always the same.. Take care and 73
@@TRXLab Wie kommst du an sowas wie den C229 auf dem RX/TX-Board ran, der sitzt verdammt eng an dem 10-pol. Steckverbinder zwischen dem dicken Transistor Q13 und dem bedrahteten Elko C201, würdest du den Steckverbinder ausbauen oder kommt man da mit deiner Hakko ran? Ansonsten: Klasse Video, hab auch gerade dieses Feedbackproblem gehabt, nu geht die Kiste wieder! Hab anno dazumals ('90 bis 2000) bei Conrad gearbeitet und etliche davon verkauft, nach gerade mal 30 Jahren hab ich nun endlich selber zwei davon und geb sie nicht wieder her! .... .. 73 DL5MHK
Years ago, troubleshooting the failures of AM broadcast receivers, this symptom was called "motorboating" - and the first suspect was the power supply filter capacitor...
Da hab ich wohl richtig Glück, dass mein 90-er TS50 (noch) funktioniert. Werde mich im Bedarfsfall natürlich an diese guten Reparaturvideos zurückerinnern. 73 de DL1LAJ
Nur ein Rat.. dieser Fehler ist schleichend. Wenn die ersten Ausfälle kommen kann es bereits zu spät sein. Leider geht es nicht immer so gut aus wie hier. Oft sind die PCB's unreparierbar defekt! Schaue dir dringend die Situation bei deinem Gerät an, mindestens den Cap im Bedienteil!
Danke für den Rat. Wie heißt es doch so trefflich: "Vorbeugen ist besser als heilen". Habe übrigens die Speicherbatterie auch schon wechseln müssen. Eignet sich nicht der Einbau von Tantal- Elkos statt SMD Becher- Elkos (zumindest die kleinen Kapazitäten) ? Tantal- Elkos haben ja die Eigenschaft, langlebiger zu sein und nicht auszulaufen.
Oscillation in the audio power amp? Haven't watched all yet, but this springs to mind immediately :) I changed more than 20 SMD lytics in a TS50 some days ago. Tracks around the one on the front panel had to be repaired also
It reminded me of a toy steering wheel with mechanical rolling road. There's a few vids of the "Tomy Racing Turbo" and someone has also put a Pi & LCD dashboard in to play Outrun. 🚘
Hopefully you told the owner that his rig is in jeopardy because of the high RF output is too high by 50%...he/she may not know that and may want you to see why it's power level is so high. Hate those darn caps in the TS-50! ;-)
cool video,and you even give people the room to diagnose in a way... very cool!! bought a ts 50 myself and when you switch in vfo a and activate the up button it jumps to vfo b,is this a known fault??? cool video love it..
Hi Peter. really enjoy watching and learning from your videos. Working on a TS50 myself and totally confused with it. Have no receive audio. Getting beeps through the speaker as buttons are pushed, and volume is working but RX not coming through. Any chance you have come across this before? I would love to know what the red led is at IC11 on the TXRX board! Cant find anything on it. Stay safe.
i would have turned the power down to spec. and tell the OP its the best for the radio and if you want higher power get a small external amp. hihi great video
Hi Peter, thanks for the video. A simple question: my lithium battery is gone (unfortunately here in Africa I had to order it). Do you think that the power output is related to the protection done by the lithium battery? The radio doesn't give any output power and it has been in standby for sometime hence the Li-on battery gone. Thanks
Hello Peter, missed some videos because lake of time but te gets up now. Always good, love it. I think using uv ligt is handy to see if there is an leaking capacitor. But your method is new for me but smart and simple! Thanks Ps. Do you use 10MHz reference on the cms? I just installed it but have to find out how to know if unit is using it or the internal one.
Wie immer perfekt ausgeführte Reparatur. Der Drang mir den Bereich um genau diese Kondensatoren anzusehen wird wird immer zwanghafter 😵 jetzt weiß ich wieder mal warum 🤓 73 de Bernd
The circuit diagram (12:19) doesn't make sense... Pin 7 is a bootstrap pin according to data sheet and appears to be decoupled to ground by C126 22uf. Surely a value this great would be shunting any audio from pin 6 by C125 47uf and have a very hard time??
Thanks for all your videos!! Great work!. I have a question about the outgoing lowpass filters. If you run the radio without them, What would happen? Are they just to protect for unwanted outgoing interference or do the protect the finals too?
Hi Peter, at 27:03 point in the video there is a perfboard in the bottom left corner with an IC that looks like add on or some kind of repair. Do you know what is this? Doesn't seem a factory element. 73, Pablo
yes, simply because all data sheets today are using 120 Hz for testing. I have several videos on electrolytics here on my channel such as video #83...you may have a look around..
Hello Peter, I have to change the leak capacitor on display unit and ask you for your cleaning procedure of the acid on the print. What do you use therfore? Liebe Grüße Mario 73 de OE6FFF
Hi Mario, very often you have to sand off the board clean it with isopropanol alcohol and than you need to put fresh green uv solder mask to the pcb,,, hope that helps.. 73
I have also fixed several TS-50S with same/similar problem. ALWAYS the capacitors have leaked badly. ALL TS-50S are a TIMEBOMB. They WILL fail. For sure
