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a strange thing happened i clamped the neg to the volt meter to the chassis and noticed the rec increased. When i touched the pos probe from the volt meter to v302 pin2 it shocked the receive into working again it faded out after awhile again so i shocked it again into working i dont understand...

The Tram was working great for a few hours. then when i unkeyed the microphone the receive was gone. I turned it off for awhile and turned it back on and it was receiving again, for about 4 minutes, then it fades away. I read that if you spray air on the board it may cool the bad part to...

i think the two tubes may be compatible, i checked the tubes on my tube tester they checked to be okay im still not sure what caused the receive to be weak in the first place but i think the tube was weak. I cleaned the pins and contacts with electronics cleaner, right now im really happy to be...

i think i found the problem i bought a set of tubes for the tram when i purchased it the box for the v302 tube said 6bk7b. But the tube inside the box was a 6bq7a. so i put the right tube 6bk7b in the radio and now it receives much better.

The volyage should be around 110v at v303 pin 6, but it is about 432v it should be reduced to about 250v between r319 and r320,

I have no receive on am, in crystal, or manual the ssb has a little bit of gain in xtal ,and manual mode. transmit seems okay. I have swapped out r319, and r320, twice. Both times they did not reducing the voltage to pin 6. I am really confused.

Lowering the input from 3 watts to 2 1/2 watts made a big difference to the ssb delay. It is working much better now. The output is a little less but its handling the ssb much better.

I re-read this post the amp. bias is something i need to get a better understanding of. i have been doing alot of reading on radio stuff lately, so it sometimes gets to be a bit confusing when you get older. im propably not going to change the capacitance of the 470uf 16v. i do not want to do...

I am very intrigued by this external relay. but i have the replacment relay i ordered, and it is working great. Unfortunately the ssb is still clicking too soon at about 200watts. it swings about 250 on ssb. to increase capacitance, i found a 1000uf 16v cap. and a 2200uf 16v cap. im wondering...

Im looking at the varmint xl600 relay but i cannot read the info on the relay does anyone know the relay part number and description for the xl600 relay. Thanks

I found a replacement for the demon 250 relay part number ka4473 On ebay. it cost $23.53 . it is used but it has a 2 year warranty.

Thank You Dman I ll ditch the relay its been sanded and so much is worn off there is nothing left of the little round contacts.

i found a relay that is the same as the Demon one but its for ac current. if i buy this for about $14.00 and transplant the relay contacts would that work to repair the worn out contacts

i think i may have been miss read. the middle tune knob is the one that runs out of adjustment the load knob is peaking okay. there are 3 knobs on the front and three adjustments in side one is next to a tube and two are next to the coax hookups. The front knobs are left to right, load, tune and...

i fiddled with the relay and got it working again. the ssb still clicks off and on at about 200watts so ill have to keep the modulation up. i have 1 more of the can capacitor to replace. i wonder if this ssb delay is normal for the demon 250

The top relay is shot . Im looking for another one.

Now no output. i turned it on and let it warm up switched the standby off and back on then i keyed up and the demon has no power out. the relay works, the ssb delay works the pre amp receive works, but now its dead i do not know where to start. im really frustrated.

I Also noticed some of the adjustments do not seem to be working very well. I sprayed the tube and relay sockets and used emery cloth on both of the relays contacts and inside the nobs. the top relay is pitted really bad i was able to clean it with emery cloth. I noticed the middle tune nob does...

My demon 250, unkeys too soon on ssb with the ssb delay on. I replaced all but one of the blue can capacitors. It should be here by friday. Im wondering where is the ssb delay capacitor, and what should i change the value to. so i can increase the delay. Thanks.

Thats what im looking for. i will order one this weekend sometime. Thank You.