President Washington. Low AM/SSB power. Help?!

[doffo]

Just got home a bit ago. Great to visit family.

So.. I desoldered the legs of the diode, and it checked out ok on the final side... To be sure, I desoldered the diode on the driver side, and it checked out exactly the same... :/ Both working and not letting anything through when you reverse the probes.

This guy.... on R180.... 56k resistor according to the thing... But man, its a big ugly guy!!!?? lol... compared to the rest of the resistors.. This one is reading a direct short, and no matter the ohms settings, its reading 0.00... I tested another resistor I had in the drawer to be sure my DMM wasnt messed up, and it was reading the ohms of the other resistor just fine... Is R180 the culprit?

 

[NZ8N]

56 Ohms?? Or .56 Ohms. It looks like an Omega after the 56, the K might be a temperature rating.

 

[doffo]

56 Ohms?? Or .56 Ohms. It looks like an Omega after the 56, the K might be a temperature rating.

Ooops, good catch.. Yea, an Omega after the 56. so should it of read 56 ohms?

 

[NZ8N]

This is a uPD858 chassis or MB8719 ?

Edit: I found a schematic for Cobra 138XLR, which is also a uPD858. R180 is listed as a 56 Ohm at 2w resistor.

 

[doffo]

This is a uPD858 chassis or MB8719 ?

Edit: I found a schematic for Cobra 138XLR, which is also a uPD858. R180 is listed as a 56 Ohm at 2w resistor.

858 chassis. You were right. Yea, the thing read 56 ohms.. its fine...

Coming to a loss on what is causing the havoc. Wish I woulda gave it a clean and a test prior to a recap to be sure it wasnt something I did. I will have to double check every capacitor I did. The whole radio receives at least, but transmit is a whole different ball park lol. Only other thing I havent done is swap the driver out.