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  1. T

    Cobra 148gtl Basket case!

    Definitely replace them before you do anything else. I checked all of them as I took them out and majority of them were pretty far out of tolerance if not completely bad.
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    Cobra 148gtl Basket case!

    Well, a whole 4 years later! I kust finished re-capping this radio and it fixed the issue! Now for an alignment and tune up!
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    Inside an old Pride DX-300

    I want to thank everyone in this thread for the pictures and info! I recently acquired a Pride DX300, nut it's missing all the boards!! It currently has a 4cx350a tube in it. Hopefully I can get that to work! Ive been after it for a while and I finally talked him into taking my lunch money for...
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    Mosfets and "power" claims

    So I have put mosfet finals in two radios so far, a cobra 148 and a Cobra 29. I see claims all over the internet of people getting 30-40watts out of them I've only been able to get about 18watts out of either of my radios, irf530 and 13n10. So where's everyone hiding all the magic juice! Hahaha
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    MOSFET conversions for upD858 and MB8719 boards

    Just finished doing this mod to an old school 148. 18watts am and ssb.
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    Cobra 148gtl Basket case!

    I'm having trouble aligning on ssb, and I think it is because of the squeal on the audio line. I've checked the mic wiring and mic jack backwards and forwards and it all appears right, and clean. I've checked the voltages of about every transisor on the board as well as ics and still no...
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    Cobra 148gtl Basket case!

    Thanks Andy! The radio has wear on the outside but the inside is clean! It was given to me for a "parts" radio for one I repaired that needed a mode switch so the price was right! It's too close to working for me to part out. Ive had it on for a few hours while I was diagnosing the 11mhz...
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    Cobra 148gtl Basket case!

    Ssb receive sounds okishbut I can not clarify in 100 percent. Tx I can not clarify in at all and has some pretty weird background noises in it. The radio has not been recapped yet, I'm gathering a list as I have about 5 radios to do!
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    Cobra 148gtl Basket case!

    So as a new tech I am still learning to repair radios. I am working on a 148gtl side mic that was not functioning when I got it. The pll was out of lock and I traced it back to the 11.325 crystal. I was getting no frequency from it all. Replaced it and pll locks! Moving on with the alignment I...
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    Centurion 40d meter

    I was recently given a beautiful centurion 40d. I noticed the wires to the s/rf meter were unhooked so I hooked them back up and of course the meter doesn't work! A test with the diode tester provided a very small flicker on the needle. Man, I know I'm never going to find another one of these...