I have a Tentec 422 Centurion that is blowing the main 20 Amp fuses... Looking for insights to this amp failure. It started spontaneously. I can turn on the main power OK and the filaments light up o
one of the tubes may be shorted take them out and check the pins for shorts 73 Rod I have a Tentec 422 Centurion that is blowing the main 20 Amp fuses... Looking for insights to this amp failure. It
I would pull the plate caps off first and see if ur still blowing fuses.Andy Talk is cheap, Action counts! _______________________________________________ TenTec mailing list TenTec@contesting.com ht
Thanks Rod and PC. I already tried disconnecting the plate transformer secondary and it still blew fuses. I think I have a bad transformer. I will check it further but looks like a serious expense to
A friend of mine has a Centurion he gave it to me for repairs and it would blow fuses, I took out the tubes and found one shorted.with the tubes out it did not blow fuses. Thanks Rod and PC. I alread
I'd check the HV power supply diodes. Bet one or more is shorted. Clayton N4EV On Thursday, January 30, 2014 5:41 PM, Bry Carling <bcarling@cfl.rr.com> wrote: Thanks Rod and PC. I already tried disc
When the power switch is ON there is the HV also applied. Thus I wouldn't expect shorted tubes or any HV component. Likely the bias diode shorted thus when switched to Operate the tubes fully conduct
The filaments, bias, control voltage and HV comes up when the power switch is ON. The Standby-Operate switch controls the QSK board and standby bias control. 73 Bob, K4TAX -- Original Message -- From
Thanks Bob, but the power transformer is shot. It spontaneously died for no apprent reason. Tubes are not shorted, and the rectoifoers amd cap are intact. One of the two primary windings has shorted
Sorry to learn of the bad news. There are companies around that can rewind/rebuild that transformer. Certainly worth checking into as opposed to engineering some other transformer in its place. Per c
Thanks so much Bob... The choices are rough - $500 plus shipping for a new transformer from Tentec or $385 plus shipping both ways for a rewind job! Yes, we get lightning, but this occurred when ther
For an amp that sells new today for over $3K, I'd say the $385 plus shipping is a good deal. I can't think of a company that would do it for less. I'd not think having an external transformer or HV s
Brian, Bob, and the group, Let me pop in here with a bit of wisdom and a question was the $385 rewind from ten-tec or from another company? If if remember correctly, ten tec had some issues with thei
I would keep it factory - the guys with the slide rules, pocket pens and letters after their names usually are qualified to design and/or the transformer. Mike W8TRN -- Original Message -- From: "Mik
Thanks - I really appreciate the sage advice from you guys... it's a pity that the primary fuses and inrush circuit didn't properly protect the transformer, but to be fair it is an old one. Serial nu
The Peter Dahl transformer company and rewinding was sold to another person, maybe the Hammond group? Dose anyone remember? Their prices would be you ship it to them and they rewind for materials and
Yes, Hammond Manufacturing took over last year. Their link is: http://www.hammondmfg.com/5cindex.htm Troy, W6HV The Peter Dahl transformer company and rewinding was sold to another person, maybe the
Thanks Stuart. I will probably go with Gary Brown, WZ1M. Hammond does not answer their phone message sor e-mails, and Tentec wants $565.50 plus crating and shipping. A bit prohibitive considering tha
My Centurion has a Peter Dahl replacement transformer that is over wound a bit to bump up the plate voltage. Does a nice job. It's a great amp. With the plate voltage and the RF parts graphite tubes
Hi Bry, Just thought that I would throw my 2 cents in as well. I purchased a used Centurion back in 2005, ran it for several years and then had the HV xfmr fail. Failure mode was an open secondary. I