XForce 1KW supply voltage.

[AudioShockwav]

That is correct. But when it’s on the relay kicks in and no wattage passes through. All the drive watts disappear when it’s on.‍

Temporally jump across the relay contacts.
They may be closing but damaged and not making contact.

73
Jeff

 

[Monk]

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.

Transistors that run the fans...
Are you sure they are transistors and not voltage regulators to keep the fans running at a steady speed?
Can you read the part numbers? 7808 8volt 7812 12 volt these are positive regulators, the "79's- 7908 7912 are negative regulators.

 

[Monk]

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

No, just make them sound like a jet fighter taking off!

 

[Monk]

Transistors that run the fans...
Are you sure they are transistors and not voltage regulators to keep the fans running at a steady speed?
Can you read the part numbers? 7808 8volt 7812 12 volt these are positive regulators, the "79's- 7908 7912 are negative regulators.

Sorry, I didn't read through all the posts before posting.
There are to-3 can voltage regulators too that can run 3 amps and not have to use three 1 amp regulators.

 

[Jim5570091]

My gut feeling was the contacts bad. I’ll check when I can. Thanks for everybody’s input.

 

[linearone]

That is correct. But when it’s on the relay kicks in and no wattage passes through. All the drive watts disappear when it’s on.‍

So the way that I'm reading this, it sounds like the bypass works when the box is off. But when you put the on switch on the relay automatically comes on and you no longer have a bypass and it's going into the amplifier correct? If that's the case then your keying circuit is bad. The relay should not click on until it's keyed

 

[Jim5570091]

I’ll try to be as clear as I can. Radio on driver amp on and main amp off. I get 200 watts through the main amp. Turn on the main amp and key up the relay pulls in and 0 wats out of the main amp. The tuning capacitor is soldered directly to the relay. So jumping the pins on the relay is nearly impossible without removing the tuning capacitor.

 

[linearone]

I’ll try to be as clear as I can. Radio on driver amp on and main amp off. I get 200 watts through the main amp. Turn on the main amp and key up the relay pulls in and 0 wats out of the main amp. The tuning capacitor is soldered directly to the relay. So jumping the pins on the relay is nearly impossible without removing the tuning capacitor.

Bad relay or something disconnected

 

[linearone]

I’ll try to be as clear as I can. Radio on driver amp on and main amp off. I get 200 watts through the main amp. Turn on the main amp and key up the relay pulls in and 0 wats out of the main amp. The tuning capacitor is soldered directly to the relay. So jumping the pins on the relay is nearly impossible without removing the tuning capacitor.

The next step in diagnosis is going to be to remove connections on the relay except for the one to the jacks, and start using a meter to check for continuity in and out of the relay keyed and unkeyed to make sure the signal is getting through the relay