A kit I'd like to see.

[Edward Swynar VE3 CUI]

I had very good success with the 12AU7 circuit depicted in the first
edition of ARRL's "Understanding Amateur Radio"...

Sure, the thing drifted some when first built, but it taught me---among
other things!---the benefits of temperature compensating capacitors.
Contrary to time honoured belief at VE3CUI, those silver mica jobbies are
NOT the "...be all & end all" when it comes to stability.

I've built numerous rigs in my time, but I must say, tackling a good,
working VFO was a source of special pride to me...

~73~ Eddy VE3CUI - VE3XZ



----------
> From: Conrad Hoffman <crhoff at BESTNETPC.COM>
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: Re: A kit I'd like to see.
> Date: April 18, 1999 2:18 PM
>
> An Opinion,
>
> Building a really good VFO is not all that easy.  I have done them from
> scratch and have assembled a couple while doing a Heath Marauder and
Apache.
> The best of the bunch is one I made using a capacitor from one of the ARC
> units, which is really a beautiful variable.  Hate to have to buy one
new.
> It was also built like a tank.  All of these were tube circuits, but some
of
> the same mechanical and thermal problems still exit when you go solid
state.
> I have seen some designs that will do the job, but they all tend to get
sort
> of exotic in order to achieve real mechanical, electrical and thermal
> stability.  Would sure be interested in trying another VFO if someone has
a
> new up to date circuit that doesn't require parts that are overly hard to
> obtain.
>
> Conrad   W8MHH   crhoff at bestnetpc.com
>
>
>
> >Something I sure could use (and I bet some other boatanchor fans could,
> >too) would be a kit for a VFO (or even a VXO) that was capable of
> >driving a boatanchor xmtr.  Would be fairly simple, I expect.  Digital
> >readout not a necessity, maybe an option.  Could be a hybrid (Doug DeMaw
> >had some plans in QST in the early 70's for a two transistor followed by
> >a 6C4 circuit.
> >
> >Alternately, what about a retro-fit board for, say, the HG-10 or VF-1,
> >using the old L/C circuit but replacing the oscillator with something
> >stable enough to run on 15 meters without a lot of chirp?
> >
> >Differential keying? QSK?
> >
> >If it was feasible, reasonable, and relatively simple, like the Heathkit
> >VFO's of yore, is there any interest out there that might be able to get
> >a kit company interested?  Maybe the cake-pan outfit?
> >
> >Is this crazy?  I'd be interested in hearing any comments.
> >
> >Tnx es 73
> >Tom n0jmy
>
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