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One of my resistors on the combiner gets hot on key up. And one of my 10 ohm resistors on that pill burned as well.

before I put the cover back on, I tested the fans with a12 volt power source. All 6 fans are toast. So it looks like it will be getting 115 ac fans. And that’s not all the collateral damage. I have 1 of the 2879 transistors that isn’t balanced. I’m sure they have been replaced already once with...

One last question. You can see it’s a straight 10 pill SC2879 Toshiba red dot. What is a good safe amount of wattage to drive it with?

Awesome. I thought about adding a 110vac relay and triggering it from the main power switch to turn them on. However I would like to keep all the components original. Again y’all have been super helpful. Thanks again.

I forgot to add on my last reply that they had the heat sinks on them I just removed the while I was working on them.

Roger that. Thanks. They are 12 volt fans. The 21 volts I have access to in the amp will over power the fans right?

So initially as soon as the power was turned on the transistors that turn on the fans would smoke. Once I lifted the leg of those transistors my short went away. And the amp powers up fine now. I think those transistors for the fans are just switching transistors. I’m going to try and order the...

I did continuity test across ground to buss bar while the wires were disconnected. Their common so I have a short somewhere. Going to start removing components one at a time until I find the short. Thanks for your advice.

I read 21 VDC. No load. So I guess that rules that out.

And I’ve been running it for several years. 110vac.

It is wired 110vac. I will have desolder the wires from the buss bar to test. I’m scared I’ll pop something else. Looks like it’s using two separate transformers on individual setup. I plan on removing the wires and testing the voltage on them later tonight. Just needed to know what I should be...

I have a gut feeling the transformers broken down and sent 110 vac to the main board.

Hope attaching the photos clears the photos. The 3 transistors that turn the fans on smoked as soon as it powered on. Just need to figure out what power is supposed to be on the the main power bar. I think it’s set up like a mobile amplifier with a power supply added. Thanks again.

George wouldn’t give me the length of the stub and stub wires. What I ended up doing is matching the combined stub and stub wires with a 1/8” stainless steel welding rod approximately 2.5 feet long and cutting the stub wire to match the original length. This gave me more room to move the...

I really appreciate the help. I attached a couple of pictures of pages in the manual I have questions on. I couldn’t find the answers in the manual. Question 1. Page 7 as long as the matching stubs end 4” from the 1st director should make over all length close to correct over all length? 2...