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Ranch 55, your information and explaination is very helpful to me. I will take my time and double check everything very carefully as I proceed. Any parts I do not have I will purchase and make certain they are correct. When I get this done I will let you know how I make out. Much appreciated Sir!

Thank you for the great information. It is very helpful to a novice like myself. I will put a new battery connector on so I have more wire to get to the front of the PC board. When I get it soldered I will let you know how I make out. Thank you so very much for your help and patience.

loosecannon. Just to try and clarify this. I should solder the new battery connector to the back side of the PC board on the same pins that correspond to the front side. Positive wire to pin 8 and negative wire to pin 9 at their respective solder connections? Thanks

Also is pin 9 the negative solder point on the front side of the battery wire connection as well as the back side? Is it the same spot on both sides of the PC board?

Hi loosecannon. Bare with me here. Solder the battery negative lead wire to pin 9 on the back side of the PC board? The 5K adjustment pot you refer to. I do not recognize it. Does it have a screw type adjustment like many pots do? Just trying to learn here about this mic. Thanks

What is 5k adjustment pot?

I found no continuity from pin 9 from front to back of board for the negative. No sign of solder pads either. I think the trace to the pads may have pulled out. So very small! How can I repair the trace? Did get continuity on positive so I reattached red wire. Just need to deal with negative. Thanks

Sorry I did not see your message right away. My bad. The 5 watt wire wound resister gets too hot to touch in a few seconds. All resistors wqere replaced with ones of equal values. All 4 final power transistors were replaced with toshiba 2879s not fakes that you get from ebay. I do not have...

Thanks Ranch 55. I will test for voltage at those locations and let you know what I find. It might take a few days with my medical tests coming up.

What readings should I be getting from each of these components? Thanks

Hi Loose Cannon. I was able to resolder the positive battery lead after cleaning the old connection that was pulled out. I used a solder sucker to get the old solder and wire out of the hole. I got continuity and resoldered the positive lead. I did not have the same luck with the negative lead...

I do not speak Italian, but Thank You for responding!!

Thank you

Hi Ranch55. I am not well schooled in electronics. If you could show me on a diagram where to check the DC voltage on the outboard end of the transformer that would help. Also can I check the power transistors for power on the collectors without removing the transistors? And where to check the...

No voltage power. Not sure what the difference is. If you have no power, you have no voltage or RF power. Correct?

Will do. Thanks.

D 1,2 and 4 on diagram. Thanks

Are the diodes on a Texas Star DX500 through hole mount? Thanks

It is the wire wound resistor that is getting hot.. Any ideas as to why?

Thank you this information and drawing. Much appreciated. I will use this to try and pin the issue down. Any idea why the 25 ohm 5 watt wire wound resister on the left front side of the amp gets so hot? the one on the right side does not. Thanks.