You fantastic Peter, you are a teacher with great regards to solving problems with common electronic sense , by your level which is very high by my understanding!!
I don’t have much of a clue about electronics but I love to see Peters detective work in repairing this stuff. Genius at work. Who is going to replace him when he can no longer doing this?👍☘️
Honestly this is my favorite you tube channel , Im always excited when I get a notification of a new video . I suspected the detector diodes from the start. If you ever got tired of working in your own lab you would be a fantastic teacher..... your repairs are always very detailed and your fault finding is beyond awesome. I really loved the series you did on balun's and unun's and I now always make my own because of your video's. Peter you are just awesome thanks for all your efforts.
A very thorough investigation once again, as someone that builds gear I tend to value the meters, so I like to protect them. I can fix circuitry but I cannot rewind a moving coil meter so I tend to almost automatically fit back to back diodes across them. It is a reasonable precaution you could add to this, just a air of 1N4001s across each one. I have fried the detector diodes in one of my meters, about time I fixed it! 73. Thank you for your excellent videos.
Thank you I just picked up HC-2000 after looking for one for 5 years I really enjoyed the video now I know how operate the SWR Cal and trouble shoot it in future Please people stop with any Neg comments you need to relax !!! Joe Naknek Alaska KA2ZSD
Very nice. I always use my cross needle SWR / Power meter between my tuner and my radio. I also use one between the amplifier and antenna. I like to know that everything is happy when running big power.
Nice repair. No burn marks or anything came apart, it has to be the bridge or the meter itself. You go to great lengths to explain it and that has to be a good thing.
Hi Peter and congratulations for the excellent job as always. I like your style. Could you tell me the title of the book where you looked for the 1N60 diode? Or maybe an equivalent book. I would like to have a guide to find equivalent components of obsolete ones. Thank you! 🙏
First thought when you said "It just stopped working at 1.2kW" .. "Did you hear arcing and/or did you see/smell smoke? No? Then the tuner section is probably fine." A diode dying due to too high reverse voltage due to too high reflected power is quite silent, of course.
My Keysight U1273A meter doesn't like germanium diodes either. I just checked a good 1N270 germanium diode and the meter claims "NGOOD". It must be that the meter is set up for silicon.
you would probably get similar false negatives with Schotky diodes which like Ge diodes have a lower Vfwd than the typical 0.6V for normal Si rectifier diodes. I was a little surprised Peter actually found some Ge diodes which are all but obsolete theses days. Perhaps it is a national pride thing :)
At first I thought maybe this was automatic antenna tuner but no, manual. About all that can go wrong then is diodes or meter as you thougt. Good job as always, 73s
Directly when RU-vid did let me know there is an update on my followed channels I was getting excited because it’s wekend and that means the last weeks an new TRXbench video! Peter thanks you 🙏
Nice, Peter! The diodes which were in the SWR bridge look to be silicon diodes (maybe schottky) Strange that the schematic called for 1N60's, which are germanium, as the substitution table said(Jaeger or Heninger? I have those as well!) Seems like germanium diodes are difficult to find new now
Hi. Thanks for all the interesting and informative videos. Would it be possible to do an item on how to connect a spectrum analyzer to a medium to high power rig? I saved up and brought a Rigol DSA815 analyzer but have been too nervous to do much with it. These have dropped a lot in price recently so I guess many more may have one but a pensioner like myself cannot afford to risk damaging it on the first project. Thanks.
Peter, Can you please tell me is there a way to adjust the SWR meters needle ? My needle is resting just under the 1:1 line and I would like to get it to rest right on the 1:1 line.Thank you !!
Nice. I went to sleep on Saturday night and woke up Sunday to a fresh TRX Lab video! I assume the three potentiometers on the SWR board were for calibration of power? Thanks for the video Peter.
the only diode that I know can take a large current is the IN4007 if not don't know what else as point contact diodes are not high power diodes, Why is there not a 16:1 UNUN in the tuner to allow the use of long wire antennas.
Hi Hasan, I have one of these and unfortunately, the decals on the faceplate are in teribble condition. Do you know where I can get a new/good looking face plate? 73, J88AZ - Winston.
I love your channel, but the whole process was unnecessarily belabored. It sure took you a long time to find the bad diodes. A good debug tech would find those diodes right away.
Hi Bruce, thanks for your feed back. Well this channel is for training and teaching purposes. We have viewers with different knowledge levels and we try is to reach everyone. Sure that means that for some it might be boring for others it is still to fast. Do you know the right level of teaching pace to a complete inhomogeneous audience? So it makes no sense to open a device right away and fix it. That is not what my channel is meant for. I'm sorry I'm not able to fulfil everyone needs.
@@TRXLab Understood. I'm really sorry for my comment and wish to apologize for making it. I'm new to your channel and enjoy it very much. Best regards, VE3OQ
