Batboard

Hi, I was trying to measure the output on my HT1000 when I saw a quick blip on the meter and then nothing. When I try to transmit, the lite first turns red, beeps and then turns green. I went back over my set up and found the dummy load was not completely secure. Is there anything I can do here. I have other parts radios and would really like to get this radio fixed due its cosmetic condition. Any suggestions out there? Grateful for any help.

Jim

I don't think you blew the output for a couple of reasons:
1) most HT style outputs don't hit high enough voltage to damage themselves if unloaded.
2) Most modern transmitters (i.e. not tube amps) that could generate such voltages will have fold-back circuits to prevent that.
3) If you'd blown the output I think the radio would still try to transmit - it wouldn't switch back to receive.

Were you on a system that could have stunned your radio, or were you on a simplex frequency? Could it be your TX button is iffy and not making full contact? Could your battery be low?

That doesn't sound like a bad PA, that sounds like a bad battery (not enough current to transmit). What you describe is the power cycling off then back on when you go to key up. Usually see this when a battery is old and has insufficient current available to transmit.

Guys, you were right on the money. I thought I was fairly knowledgeable about radios and batteries. I tried 2 different batteries on this radio. One measured over 8 volts and the other about 7.8. After reading your comments, I went back and tried a 3rd battery and voila, success.

Thank you for getting me thinking, but I am still stumped about the bad batteries.

Jim

FWIW measuring battery voltage without the load of the transmitter can really only tell you a battery is bad, and not good. 8 volts no load might be 4 volts with load