My Argosy II / Model 225 power supply combo began acting oddly tonight. On 20 meters and above, the power supply's circuit breaker is tripping when the rig is keyed -- even when working into a dummy
Hi Craig, I'm not familiar with the Argosy. Can you turn the TX power output down on an Argosy? If so, see if turning it down makes a difference. If it makes a difference, for instance at some settin
Ken Brown wrote: "Can you turn the TX power output down....?" Yes -- and doing so will raise the threshold of circuit breaker tripping as the power output -- and current draw -- is decreased. The pro
Hi, Craig-- The finals in the Triton and black Omni radios can go into oscillation if the ALC sensing circuit is not working properly. This failure of the ALC sometimes comes from electrostatic disch
Thanks, Mike. I have increased the circuit breaker trip threshold temporarily ONLY as a test. It's back to its original setting now and I'l be consulting our friends at Ten Tec about this today. Good
can give TT a call, they will have a better 'history' of probable causes for a symptom. Might want to check the band switch just in case the connections are getting intermittant, Hope it's not the ra
Well, Ten Tec's official diagnosis is, "It could be anything" with a first reaction "sounds like the PA." Fair enough. Without the rig on TT's bench, it is impossible for them to pinpoint the problem
Didn't remember reading if you checked the SWR on the bands that trip? The TT manual says it will trip the breakers if excess current is caused by high SWR. 73, Don, NN8B ____________________________
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 07 Dec 2006 11:38:26 -0600
Makes me wonder if some RF is leaking out the power wires of the transceiver trip the electronic circuit breaker. A symptom of using rolled paper capacitors where disc ceramics with short leads are n
Dr.Johnson makes a good point about the possibility of stray RF tripping the magnetic circuit breaker in the power supply. I'll try a couple of shielding and bypass techniques. In answer to Don Kemp'
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 07 Dec 2006 13:26:51 -0600
Look where the power wires run inside the radio. If Tentec paid the same attention to that as in my 2m to 6m transverter (no care at all) the wires could be close to the PA output transformer or a lo
Sounds like the reply I expected from TT. You will find it without TT help. Check all the cheap stuff first before going to the finals. Check voltages etc. Just take your time what's broken can't be
Find out what the finals should draw. Look in your manual. It should tell you at such a 100w 18 amps. That is just an example. If finals are bad you get like a 20 amp+ draw at say half of rated outpu
Thanks for the good checklist, Dan. As Mike, N4NT, suggested at the outset, the problem may very well be ALC related. The problem is not as random as it first appeared. Here's what happens: as I adva
OK on the good SWR. I had a similar problem with my Century 21 tripping. I found the accessories attached to the external connectors had an influence on the current. When I reseated the connectors fo
If you can set the meter on the rig to show how much current the finals are pulling at the point that the supply trips you will know if it is your finals. I ill guess that the rig puts out 100 watts.