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I did as you suggested. I even decided to reinstall the original relay. The original relay has the rig acting just as it did with the replacement one. I made sure all the tubes were nicely set into their sockets. I looked as best as I could with the lights off to see if any tubes were not lit or close to being out. I know that's not a good way to decide if a tube is either good or not but I really don't have anything to lose at this point.

I just noticed something interesting that might help you figure out what could possibly be causing this receive to drop out an s unit and then immediately return upon keying then un keying the microphone.

I have been listening to the sonar for about an hour now. The receive stayed solid and did not drop out until about after 50 minutes of it being on. I did not key up from the time I turned it on until the recive dropped out.

I have the amplifier (300a) on but in standby.

The receive did not come back up after quickly tapping the microphone bar while the amplifier was in standby.

As soon as I flipped the switch from Stand by to operate then quickly keyed and un keyed the mic, the receive quickly came back up. Could it be the amp?

The only items I have inline after the amp is a Dawia 2 position switch Wich switches me between the sonar/palomar 300a and the uniden Madison/phantom, and an Autek wm1 meter.

The Madison's recive is not acting up as the Sonar's.

I'd think if the wm1 could/was causing the issue it would be happening to the Madison also.

Could it be the Dawia 2 position switch?

The fact is that the recive won't come back up with the Sonars 2 watt DK and only comes back with the 300a's 125 watt dead key. 

If I had hair I'd pull it all out.

I'm tempted to hook up the backup 2340 but this particular rig has special meaning and I enjoy operating it more than the other.

HELP ME!!!

I hope the amp HAVING to be in the operating position gives you the proverbial light bulb over the head idea. Thanks Nomad. I do appreciate your time. 73

PS. If you do come up with another idea for me to try I will follow it to the T.

If that doesn't work I guess I'm going to have no choice but to box it up and send it out. Or might I be having to box up the 300a? God only knows how much I hate having to ship this stuff. UPS has never fucked up anything but it's only a matter of time. The odds are moving against me with each shipment. Granted I haven't had to ship anything in quite a while but I know with each shipment my luck is running out. Help me through this and I'll buy you a case of whatever it is you drink. Thanks again nomad. Two case's!