He lists 2 versions for the 425, one yields higher plate voltage that the
original..$350. plus shipping for either one.
----- Original Message -----
From: "Carlin Royal" <firstname.lastname@example.org>
Sent: Saturday, August 18, 2007 11:49 AM
Subject: [TenTec] Titan 425 Transformer needed
> Sorry for the long delay on the re-post. After replacing/upgrading the
> rectifier board, installing new filter capacitors the initial problem is
> still there. I carried the amp to a local repair shop and it has been
> determined for sure the secondary leads have shorted with the primary in
> the transformer. SOOOO I am in need of a new transformer for the Titan
> 425 at this time. Since I have already come this far money wise and time
> wise, I think it would be best to get a "really good" transformer this
> time. I have emailed Peter Dahl with no response, are they still doing
> this sort of thing for amateur use?
> _"I have a Ten Tec Titan 425 that I have only had myself for about 6
> months now.
> The amp when I received it had 1 bad HV capacitor in the power supply. Due
> lack of funds at the time I replaced the one known bad capacitor. A few
> later I was operating the amplifier during a cw pileup for about 30
> minutes, I
> set everything on standby and went to lunch. When I returned to the shack
> find the amp had blown one of the 20amp fuses in the supply.
> After checking in the PS, I found that R1 the 10ohm 25watt wire wound
> on the rectifier board had went open. I replaced the blown resistor and
> the amp back up, this time again blowing a 20ampfuse and the same
> resistor. Ten
> Tec advised to replace the original rectifer board with a new one, (82112
> rev E
> I beleive) since they thought some diodes were probably leaking and was
> cause of all my troubles. Now after replacing the old rectifier board with
> new one from Ten TEc, I power the amp on and it blows another 20amp fuse
> did not appear to fry the resistor this time. Here is the main question to
> list; Could I have another bad capacitor that is failing under high
> since they do not read any shorts on the VOM when individually beng
> tested. I
> have on order 8 new 400uf 450v caps from Newark Electronics and will be
> replacing them this week, but I am looking for more input as to the
> trouble. It
> just seems odd to me that when sitting idle for just 3
> 0 minutes the thing went south and now I have had all this trouble.
> I am on the right track and it will be one of the caps in the PS, but
> would be
> interested to hear any other areas that I might could check within reason
> on the very limited bench. Thanks for any advise/comments.
> 73 "_
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