I hope you could answer this -2 questions 1. how did you terminate J6001 and J6007 to a 50-Ohm Resistor what cables where used? 2. For the Final Stage Idling current how did you connect a DC Ammeter between the Power Supply and the FTDX101MP?
Good Afternoon, do you know what rating the 50ohm resistor should be for J6001 and J6007? and is the connections to the rf board MHF4? I'm about to embark on this repair and need to order the parts for the alignment, any help much appreciated, this video is exactly what I've been looking for, Best 73 2E0IEN
I don't see how on a sofisticated radio like this, one final transistor could be demaged. Except if the bias potentiometers are faulty and jumping all over the place. Very risky that you didn't change them.
Thinking about FTDX101D for a while. Seems it has a fair share of failures. John Kruk (Yaesu USA Marketing) said FTDX101MP was flagship and pride of Yaesu. I suspect John is a "salesman" and full of beans. : ( No problems with many Yaesu radios I have, could be some user practices contributing to failures. Thank You
Well the issue is if you see some repairs on a particular radio one can think there is a problem with the product but be assured it is not. To correct those issues, that's what warranty is for. It is a very good radio, superb receiver and good working noise cancelation features.
@@TRXLab I have FTDX10 and FT-710 for over year without problems. I am considering FTDX101D (when price drops) but repair issues give me pause ; ) Thank You.
did same thing with an older ft101mp finals were over 200 dollars and within 10 seconds one of the new finals blew. dont know why but wasnt going to waste 200 more dollars on new finals again. it sat on the shelf and never worked on it again
Guter Tag. Ich habe eine Frage. Könnten Sie bitte ein Video von einem Netzteil machen? Überspannungsschutz. Es gibt etwas im Internet, aber ohne Erklärung und was sie verwenden. vielleicht eine Idee. Naar Nederlands goede dag. Ik heb een vraag. kunt u eens een filmpje maken van een voeding. overvolt beveiliging. Er is op internet wel wat te vinden maar niet met uitleg en wat ze gebruiken. mischien een idee.
Agree. Speed is out, but hey Peter still does an awesome job of showing and explaining the bench tech and procedures, so a little speed glitch is definitely forgiven. 🙂
Lieber Peter, saubere und analytische Arbeit wie immer. Es ist wirklich wichtig wiederholt darauf hinzuweisen, dass ohne entsprechendes Werkzeug und die erforderlichen Messgeräte solche Reparaturen nicht machbar sind. Wird durch unsachgemäße Arbeit, oder den tausch nur eines Final Transistor die Endstufe nach kurzer Zeit erneut defekt, so sind die Kosten noch höher. Das gleiche gilt für die Einstellung des Bias und deine wahren Worte zum Output Power. 73, DG3JA, Jörg
@@TRXLab but sorry, mine are broken now after 4 years, why? without any reason, while a friend of mine after 1 year must be a big game of defective endings, in my opinion there is something in the system that is not perfect
I had a PA transistor fail on the very first day of ownership with my FTDX101MP, although the rig had a warranty I do accept that I accidentally drove it too hard on FT8. (I had set levels but had done a reset afterwards). I changed the VRF150s without removing the board from the chassis. I bought the replacement transistors from Mouser, approximately £120 for the pair including tax. The radio has operated for over 4000 hours since without incident. 73
If you excuse me as I have a great respect for you and your knowledge, I’d give you a suggestion for those touchy trimmers. Use a screwdriver with a thicker handle or make your own (like a T for example). This will help you as you can control the angolar speed with your tangential speed of rotation. Thanks for running your channel, we all learn a lot from you. Best wishes, Diego
Shouldn't the heat spreader plate be made of copper? It looks aluminum. 100 watts is a lot to dissipate. Not sure about a bad batch of transistors but you can tell the original ones have been cooking hot. The glue is all brown and discolored. It is not age, these radios not out long enough. Good video as always.
Copper or aluminum is always a discussion. I prefer aluminum, as long the heat sink is calculated in the right way. The downside of copper is that it is oxidizing.
Peter your the best and love to learn from you and this time your voice was very fast I think you recorded this in 10x or double your normal voice. otherwise a great job as usual. This is one of the best and favorite channel. thanks Mike
When you first started the 101 after replacing the PA transistors it seems to me that.... displayed the "channel" frequency of digital emissions in the 10m band :-))) hence my exclusively.... conjecture ? . Warm greetings & Best 73 ! @@TRXLab
