Not having the EXCELLENT test equipment that you have, not having your expertise, and a few other factors, if I had such a radio go bad on me I would have to send it to someone like you to repair for me. I appreciate your excellence, your videos, and of course you!
I have a similar problem, 2M reception is terrible. Sensitivity is really bad. I've been trying to find someone around me to repair it, but seems like I'm in the wrong century 🤔
Peter, I have learned so much from your diagnostic process. You amaze me with your talent. I am an old tube/valve guy and the repairs you do are so above my head, I guess that's why I can't wait for you to post new videos. Thank you for sharing your amazing talent with all of us.
FT 60 Radio is one my Favorite Ones Created by Yaesu, the receive is a Outstanding One !! I Really enjoy Watching a Master technician operating on Radios !! This was Really a good, Video, it made my afternoon!!
You lost a SOT23 transistor or diode off the board near the top left (Looking at the video) of the ceramic filter. Kapton type tape is very useful to stop the heat spreading to other components when you are using hot air and also stops the air blowing components off the board.
Great video on the FT-60 Yeasu radio. I have one of these and it works great. Now if I have the same problem I will know what went wrong. Thanks you your excellent talent.
Your videos are always full of information. Thanks for following up with your videos. People like you who share knowledge are increasingly rare. Once again THANK YOU and CONGRATULATIONS.
Superb job, Peter. i love those situations you wish to have a third or fourth hand..;-) I have to confess that i do not like alignment by software, but today we are forced to do so. It is really sad that those damn filters fail so often, and they fail in most cases because of vy bad quality. In a hanheld like this, sometimes a heavy dropdown can be the issue, but we all lnow the corrosion horror inside.. So sad. Under normal conditions no commercial tec could repair that for a price that meets the value of this used, non high-class radio. So it is good to see that you saved it from the waste. 73 de Olaf, Peter. Bleib gesund, hol dir den dritten Piks!
Thank you, yeah those filters are failing much to often but in this case it was no mechanical issue such as fall...You are right on those radios a repair would exceed the market price.. Bleib ebenfalls gesund Olaf. mein dritter pikser ist gebucht. Hoffe bei dir auch oder gar schon erhalten...73 Peter
excellent video! I had to replace a power transistor on my FT60 radio, which I accidentally destroyed during transmission. The repair was successful. The video setting of the station is very instructive, I just miss such quality measuring instruments :-). You have a wonderful laboratory !! Hi Marcel
Hello Peter, excellent job! was the blown away three legged transistor also replaced? i missed it until 34.44minutes (the last view of the PCB). its located above the resistors/capacitors above the diode with "JA" written on it, next to the filter you replaced. Kind regards and '73 Ed.
Excelent job Peter as always and an incredible teaching lesson, i love this kind of instructive videos. Im starting to play with a tinysa as starting toy for spectr analyzer and playing with an oscilloscope and self made active probe. Is there any other option in a budget? THX for sharing your knowledge peter, nowdays not too people works in this area repairing ham or CB radios, its nice to learn from you a bit.
Nice repair, Peter! From what I saw the TX frequency on 70cm was only 400Hz low, that would not matter much inside an FM channel with ca 15KHz bandwidth, IMHO. BTW, I ordered the "DMMcheck Plus" a while ago after having seen yours. Nice to be able to calibrate DMMs when you are in doubt..
Thank you! Yes the DMMcheck Puls is really a very useful device. Yes 400 Hz does not matter much but the legal limit is 300 Hz and the Yaesu specs are requiring the same. AND off course to get the best sensitivity we wanted to target filter centre...
Accurately measuring loss or shape over a 450kHz ceramic filter is always difficult, because they have relatively high input and output impedances (~1.5kohm). Using a simple probe connected to a 50 ohm input spectrum analyser is obviously not ideal matching, and may lead to misdiagnosis. I'm wondering how you deal with this, Peter?
That is correct it is here and there critical. Since I do not need an absolute power level but rather more the relative level we can perform an inline test. That helps to evaluate the filter.
The transistor at 25:48 - upper left side of filter (next to the 3 golden testpoints/vias)- got lost at 27:28. Later at 34:58 is it not replaced. What does it do?
I have noticed in several videos that you sometimes use the older R&S tester as source and the newer one as destination for the SINAD measurement. What is the reason for that ? Bad signal generator in the new one ?
A reason why these filters fail is (apart from DC on their inputs/outputs) the ingress of flux cleaning fluid during manufacture. I don't know if the industrially used fluids are different from the usual isopropyl alcohol used in the home lab, but I would be careful when cleaning the work and not use such abundant amounts of cleaner...
Have you tried Solder-Quik? It melts at very low temp. and stays molten so if you had used it on the pins of the 455 filter you could just lift it off after applying the Solder-Quik with no need to heat up the board.
Vielen Dank fur all Deine videos. I took my ft60r from storage after 2 years and noticed that the tx is now limited to 144 to 146 and 430 to 440. It had the MARS cap mod done. Why would the upper frequency now be limited? Is there an Epsom that may have reset itself to a different countries default? Would replacing the removed Mars resistor maybe revert it? Any clues appreciated. Danke
Very nice channel. You're very knowledgeable and informative. Sir. I could absorb a lot more of what you are demonstrating if you would try to eliminate at least some of the Um's and Uh's from your videos. I am, um, of uh course asking um because I'm uh am eager to um learn. Ja?
You didn't show the input signal of the IF-detector as you said. It would be nice to follow the signal path for once and see your setup how you measure. The values that is stated in the manual, how do they relate to the input signal? Is it input signal +10.4 dBu for 146MHz?
Yeah the video got to long I had to cut out a bit. But it was always in line testing with a signal over the antenna input.. The test figures in the manual were wrong no idea what they printed down...
IDENTICAL ISSUE FOR BOTH BANDS, INDICATES FILTERS HAVE GONE BAD. D.C BLOCKING CAPS ARE OFTEN LEFT OUT, CREATING A BIAS ACROSS THE FILTER, AND OXIDIZES THE PLATES. SENSITIVITY SLOWLY DEGRADES. THIS IS A CLEAR SIGN OF A FILTER ISSUE.
I learn so much from the videos it helps me here in the shack thanks for doing such a grate job just wish could email you to I do understand you must be so busy keep up the good work I feel ever think you do his tested and proven I built the 9 to 1 unum fist contact from UK to vk land was out portable amazing its up at home now top man fir teaching us
