Heathkit Apache TX-1

Larry Knapp kc8jx at YAHOO.COM
Tue Sep 4 13:52:57 EDT 2007

I'm confused...a TX-1 is an Apache.
".....putting the transmitter in the same cabinet as the TX-1".

Larry KC8JX
--- "L.G. Robertson" <digital-conjurers at ROADRUNNER.COM> wrote:

> Mike,
> If it DOES turn out to be a transformer...
>  From talking to other owners through the years, the Apache seems to have 
> had a proclivity for blowing the "big iron" transfomers in it.  Personally, 
> IMHO, this results from the not-so-brilliant Heath idea of putting the 
> transmitter in the same cabinet as the TX-1; one uses about 65W, the other 
> can draw up to 500W.  Not so good!
> In summary, once you find your "tick", you might try the following 
> life-prolonging TX-1 tricks others have:
> 1. Build a stepdown "bucking" transformer, and run the thing @ 110 VAC 
> (slows down, but does not eliminate the heating problem)
> 2. Replace that wimpy little fan inside the finals cage with a modern 
> muffin fan of greater ability mounted on the outside of the cage
> 3. Direct a fan (or fans) at the cabinet itself while it's in use.
> As an old (very) rule of thumb, no part (save the tubes) should get hotter 
> than 50C; use an IR probe (Radio Shack, $20) or a thermocouple (available 
> on many inexpensive Sears multimeters) to measure the temps on your 
> transformers.  Even 45-47C is a bit warm for an old part.
> You might also check with some of the guys at HEATH at LISTSERV.TEMPE.GOV .
> -Lin/KJ6EF

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