[AMRadio] Best Heathkit AM Transmitter


EP Swynar gswynar at durham.net
Tue Nov 13 13:39:09 EST 2007


Hi Guys,

I agree 101% with all of the positive sentiments re. the Viking II --- it
looks good, sounds great (with a minimum of fuss in the "mods" dept.), and
is really quite easy to work on, IF you don't mind the weight...!

Mine is the rather unique & rare Canadian version, built for the Royal
Canadian Air Force 'way back when: it covers the entire SW spectruum, so
there is no "band switch", as such --- just multiple frequency ranges, on
all of the different switches.

It is NOT the U.S. Civil Defence version, but a different animal in and of
itself...

...Best of all, I picked it up a coupla years ago for the king's ranson of
$60.00!

~73~ Eddy VE3CUI - VE3XZ


*************************************


----- Original Message ----- 
From: "Geoff/W5OMR" <ars.w5omr at gmail.com>
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Tuesday, November 13, 2007 1:30 PM
Subject: Re: [AMRadio] Best Heathkit AM Transmitter


> Donald Sanders wrote:
> > I have to agree that the dial was a nuisance but I got it working well
> > after a couple tries and over 5 years it worked well. The audio stage
> > was a bit hard to get into after it is built and I modified it as I went
to
> > have better bandpass. I also had the SB-10 SSB adapter and used it
> > with the Apache.
> > Without the SB-10 I would also chose the DX100B.
>
> The VFO may not be built-in, but Viking II's, when working proper, are
> kinda hard to beat.
>
> As with any rig, simply replace a few caps, make a couple of mods (PTT,
> audio) and you've got a solid 100w performer.
>
> One could even change out the 6AU6's for a pair of 12AX7's, using the
> first one as a Crystal Microphone equalizer, and inverse feed-back, the
> 2nd for amplification, into a phase-inverter that would then connect up,
> capacitively to the grids of the 807's to get around the weak link in
> the audio chain, the audio-driver transformer.
>
> Yeah, I know the thread is about 'Heathkit' rigs, but one 100w
> plate-modulated AM rig, is as good as the next 100w plate-modulated AM
rig.
>
> Apache, DX-100, Viking I/II, any of the 32V series, B&W 5100, etc...
>
> -- 
> Driving your AM Rig without a scope,
> is like driving your car at night, without headlights. (K4KYV)
>
> --
> 73 = Best Regards,
> -Geoff/W5OMR
>
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