Hi Ron
Thanks for the nice complements about my website :-) I had a look around
your website this morning, you have some very interesting projects there. I
sent an email to a fellow who I know is interested in panoramic adapters and
has been corresponding with me about my spectrum analyser (
)
If you are going to build one of the earlier designs, I have most of the
Huff Puff articles in my reference library for download, see
. In performance
terms, I think my 2-chip simplification should perform as well as the
original Huff Puff designs. For the ultimate performance, G7IXH's "fast"
stabiliser is slightly more complex but performs best.
I do know that people have used BITX20's for PSK31 very successfully. But
don't forget that your VFO for 17m is twice the BITX20 VFO's frequency,
therefore it is bound to be less stable (all other things being equal).
73 Hans G0UPL
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-----Original Message-----
From: pa2rf [mailto:pa2rf@...]
Sent: 03 February 2005 12:11
To: BITX20@...
Subject: [BITX20] Re: Stability?
Dear Hans,
Nice website with great designs Hans.
I intend to build a huff-and-puff circuit (design by om Spaargaren
PA0KSB) when i do not get sufficient stability from the circuit as
shown in the original bitx circuitry.
Do you know if succesful qso's have been made with digimodes (psk31,
rtty) using the bitx (without huff & puff circuit).
Regards es 73 de Ron
pa2rf
--- In BITX20@..., Hans Summers <Hans.Summers@t...> wrote:
Ron
In case you are not aware of my very simple Huff & Puff VFO
stabiliser
designs, you can read about them here:
<> .
The
2-chip design uses common and cheap IC's 74HC4060 and 74HC74, an
ordinary
32.768KHz watch crystal, and a 5mm red LED for tuning. This design
works
well and has been successfully replicated by at least 5 different
constructors.
73 Hans G0UPL
] Stability?
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