[AMRadio] would like to build a little homebrew project


Michael Mertes fnerks1 at yahoo.com
Wed Aug 1 15:47:24 EDT 2007


I would like to have a copy of that article; for I
found an old homebrew transmitter recently that uses a
pair of 807s to modulate an 814. It needs a complete
rebuild, and I have not put power to it yet. The bad
news is that looks like it has been sitting in a barn
for the last 30+ years. The 814 has a rated plate
dissipation of 65 watts (is cheap and plentiful) and
will fit in an 811 socket... or so I hear. The
modulation transformer looks like it came out of an
ARC-5. I suspect that this transmitter may have been
built from a handbook article, but I don't have a HB
that old. 

Any thoughts?

Mike /kz5m


--- crawfish <crawfish at surfmore.net> wrote:

> I just received a copy of the 12th Radio
> handbook(1949). After WWII, 160m
> was given to LORAN for the most part, and you had to
> go to the pre-war Radio
> Handbooks to find amps for 160m.In recent days on
> this reflector, use of
> 4-65's were discussed. A 200 watt input amp using a
> 4-65 modulated by a pair
> of 807's is shown(it is actually a complete
> transmitter). Of course, this is
> 80-10m.Lots of good stuff in the old RADIO
> Handbooks. I have a pair of
> HK254's I want to use on 160m.I have an article for
> an 80-10m version in the
> 12th edition.
>                                                     
>                    Joe
> W4AAB
> 



       
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