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Post by husker on Feb 4, 2019 0:38:47 GMT -5
Hi all, I have been working on my Mark III for over a decade slowly doing work between other projects. I had the AM working awesome, but no SSB receive at all. I went to adjust the plate tuning, the screw was frozen, when it let go it moved way to much and pegged my swr/power meter. I re adjusted it but now I have no receive at all even in AM. SPOT doesn't work either (it did). So it seems the relay isnt fully resetting? Also the 8.5k sandbar resistor is getting extremely hot in the transmitter side.
There is a slight hiss (like static) but no receive. On the SSB side, it isn't working either. I can transmit but zero receive at all. No hiss no nothing. I have replaced all the caps, any burnt resistors etc.
HELP guys..I want my MarkIII to work!!!
Bob
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Post by 238 on Feb 4, 2019 21:47:38 GMT -5
Mine did that the other day. It ended up being the V3/ 12at7 tube. Tube was good, but the pins & socket needed cleaning. When i did that the receive came back. 238
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Post by husker on Feb 4, 2019 22:45:31 GMT -5
I am thinking part of the relay is stuck. The 8.5 K sandbar gets so dang hot, it would blister your finger. zthat's nt good lol
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Post by husker on Feb 4, 2019 23:02:10 GMT -5
Mine did that the other day. It ended up being the V3/ 12at7 tube. Tube was good, but the pins & socket needed cleaning. When i did that the receive came back. 238 Well, I tried what you said...son of a gun if AM didnt come back! Now on the SSB lol
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Post by 321 treeclimber on Feb 5, 2019 7:37:27 GMT -5
What is the spot switch ? Sorry,its an ignorant question but i have it on a hb111 that i want to get working. 321
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Post by 238 on Feb 6, 2019 1:47:47 GMT -5
You use it to line the receiver with the transmitter.
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Post by 321 treeclimber on Feb 6, 2019 6:09:23 GMT -5
Thank's
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