Hi Paul,
-
> PLoret1648@aol.com writes:
> Do any of you fine gents know of a dedicated engineer
> out there whom might enjoy doing modifications as
> an aside?
-
Yes, but the ones who know much of anything don't work
cheap. It would be worth your while to search the amps
archives and consult some ARRL & Radio Handbooks
for the information you seek.
-
> I have a couple of paging amp modules of Motorola
> Micor decent that I would like to have one of, the one
> on 2M which produces 500w admirably,
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That would probably be the classic two tube 4cx250
unit.... Motorola tried to "make play" for a number of
years. If you had the 800/990 Mhz PA, it would use
a single tube, probably from the 3xc400a7 family
(from memory). The 800Mhz units can be moved
up to 906 with a rework...
-
.... or it would be the hybrid solid state units which are
also large heat generators... in their own right.
-
Motorola also made some odd sizes and style amps
throughout the spectrums. Most would not hold up
in high power applications without a maintenance
contract... my former line of work for the "big M".
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> transformed into something using two 8877's.
> Won't ever use all the power, but i'd be
> something to have to EME with a hairbrush as
> an antenna!
-
It's honestly not an easy or practical conversion,
you'd be starting from the ground up, tearing out
much more than you'd be using...
-
> There's info on the web about a couple of fella
> that tackled this project some time ago, but it
> seems to drop in mid-subject, and can't get but
> one pf the blokes to reply.
-
I would be surprised to read if the conversion
was completed without a lot of work... or completed
at all with much of the original circuits in place.
Motorola Engineers were always way overkill
and quirky in their tube amplifier circuits.
-
> I have marginal Material he sent me in the hard
> disk here, so I can forward it if I find a suitor. I'm not
> qualified.Contact > me directly.
> ploret1648@aol.com
> 73 de Paul
>
Email copies of what you have to me and
I'll give you an honest opinion of what your up
against.
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I've even got original documentation for many
Motorola Amplifier Product lines...
-
cheers
skipp
-
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