Hi Eddy,
I had waited for someone else to jump in, I guess, but I'm not usually
that shy ;-)
I suspect you won't be able to pad it that much and still have it work
acceptably, if at all. Add some inductance as well.
And take a look at the 2-BQ ckt for ideas.
73,
Al, W8UT
New Bern, NC
www.boatanchors.org
www.hammarlund.info
"there is nothing -absolutely nothing- half as much worth doing as simply
messing about in boats."
Ratty, to Mole
----- Original Message -----
From: "Eddy Swynar" <[email protected]>
To: "Eddy Swynar" <[email protected]>; <[email protected]>
Sent: Thursday, January 15, 2009 3:01 PM
Subject: Re: [Drakelist] R-4 Receiver Enhancement
Good Day All,
I guess the lack of ANY response(!) whatsoever to my most recent posting
(below) would indicate that some classic "... tinkering and experimenting"
is in the offing at VE3CUI...!
I've "padded up" the "C" in Heathkit QF-1 Q-multipliers in order to raise
the resonant frequency above 455-KHz, but I've never actually padded one
down before, to lower the frequency...it should be most interesting to see
what it might take to get it down to the R-4's 50-KHz IF...
If interested, stay tuned...!
~73~ Eddy VE3CUI - VE3XZ
********************************************************
----- Original Message -----
From: Eddy Swynar
To: [email protected]
Sent: Tuesday, January 13, 2009 10:46 AM
Subject: R-4 Receiver Enhancement
Good Morning All,
I'm curious if anyone on this list has ever attempted to hook-up a
Q-multiplier to his/her Drake R-4 receiver, in order to enhance its
selectivity/sensitivity for weak signal CW reception...?
I have a spare Heathkit QF-1 here that I'm thinking of "padding" down to
the 50-KHz IF of my old R-4.
Any comments, or real-world experiences in this regard?
My hands-on realities with Q-multipliers have been limited to IFs of
455-KHz, and 725-KHz ONLY here --- in every application, however, the
inclusion of a Q-multiplier has proven to be well worth the effort
involved...
But I've never had occasion to try one on an IF frequency as low as
50-KHz...until now, of course! Hi Hi.
Thanks in advance, & my vy
~73!~ Eddy VE3CUI - VE3XZ
--------------------------------------------------------------------------------
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