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I do, but some only replace them if failed. They dont come in a recap kit so you will need to order them. As I understand, when tantalums were in their infancy, they were prone to failure due to manufacturing processes and electrolytic composition. I don't know what years that timeframe...
I check mating surfaces with a flat edge or razors edge (hey yo!). A thick pane of glass, some fine grit sandpaper assortment and elbow grease can get you a mirror finish, perfectly flat. That's how I deck processors and heatsinks. A small drop of thermal compound will cover a large area of...
Desire to learn, humility, modesty and some thick skin. These boys 'round here CAN be brutal, but that's usually the exception and not the rule. It's like a big family, assuming you can get invited to the reunion.
I don't seem to hear Columbia for some reason but Everytime I swing the beam around I stop on your azimuth and call out on the usual channels. I'm still trying.
I followed your link, saw it offered a $6 off coupon. I just bought one. (I'm a sucker for cheap anything) ((I need help)) I will let you know what I think of it.
I bought the PDF direct from Sam's some years ago.. looks like Brandon has you covered tho. If what you need isn't in there, I can upload the PDF for that radio.
edit: I had 2 copies, the first they sent was too dark so I asked them to rescan the document and they obliged. I've included both.
Thanks, I have that dual final upgrade printed out somewhere, I might try it. I guess whoever upgraded the modulator didn't get that far, as it only has 1 final in it. Yes, there are silkscreen designators for the supporting parts of the second final. I can start a new thread instead of...
Okay, it has the different transistors in those spots, but tr52 I can't make it out, and i havent located r295 yet. The face just says 148gtl and the rear plate is gone. I think it's a dx model, but the faceplate is wrong. It has to be, after doing some looking around the Internet. Not important...
I opened it up to verify, it does indeed have a large 2sb817 PNP pass regulator. HOWEVER, the schematic calls for a 2sa1012 PNP which is smaller. I suppose someone replaced it along the line, it is an old radio, but it IS a 148 with a PB010 board and, so far as I have gathered from that, the MK2...
I have only had the privilege of peeking inside one 148, and it's near (not exactly) identical to the exports I seen. It does have the large pass regulator. I assumed it would take the diode peak swing mod as it is so similar. Maybe the large transistor has been changed, but it's still a larger...
Guess not, I thought the mk2 148 was the original export model copied by others. Sorry. I have a 148 with the large pnp pass regulator. Maybe it was a mistake.
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