KLH Model 21 found at Goodwill today!

[Captainclock]

Originally Posted by Ed in Tx

Post 9 jr tech mentioned the rectifiers. My thought too. You checked both of those?

No I didn't check the diodes yet, that was the next thing I was going to check, would I check them with the diode function on my DMM? Also when I go to check the diodes do I need to remove them from the circuit to check them or can they be in circuit yet to check them? Also would a couple 1N4007 diodes work in place of the original diodes if they do turn out to be bad?

Edit: I checked the diodes and here are my results:

Diode 1:
171
118 in reverse

Diode 2:
174
119 in reverse

I measured the diodes with the radio unplugged and turned off, I'm not sure what the numbers mean but maybe some of you guys on here might be able to interpret the results for me as to whether or not my measurements mean the diodes are good or bad, or whether or not I need to have the radio plugged in and powered on to test more accurately, also the diodes were tested using the diode function on my DMM.