[AMRadio] RE: Receiver update.

[Gary Schafer]

Hi Brett,

Here is a link to Kiwa filters. A friend of mine put one in a hamarlund
receiver. Said it worked great. Price is much less than some mechanical
filters.

http://www.kiwa.com/

If you are interested I have an old Wilcox model CW3 receiver. It is single
channel crystal controlled. Uses plug in coils to change bands. It is rack
panel about 3 1/2 inches high. Tubes and coils are mounted laying down. Uses
tubes like 6sn7, 6K8 etc. Has 3 large IF cans about 1 1/2 inches square by 4
inches tall. I think 455 kc but not sure. Also has power supply built in. I do
not have any of the plug in coils or crystal. (all octal sockets) All the rest
is there.  It is yours if you can use it.

73
Gary  K4FMX




WN3B wrote:

> Hey Russ, I beat you this time. I already mailed a 12SA7 out to Brett
> earlier today.
> Oops, Brett may have found one I don't know I just figured I would mail him
> one.
>
> Brett, you got a tube coming................73, Mike / WN3B
>
> ----- Original Message -----
> From: "russ dworakowski" <wb3fau at hotmail.com>
> To: <amradio at mailman.qth.net>
> Sent: Friday, February 08, 2002 2:17 PM
> Subject: Re: [AMRadio] RE: Receiver update.
>
> > Hey  Brett, consider looking at  a SP400 for  circuit ideas.  Did you
> find
> > a  12SA7?  If  not,  I  will send you  one,  email me.  Russ
> >
> >
> > >From: Brett Gazdzinski <brett.gazdzinski at wcom.com>
> > >Reply-To: amradio at mailman.qth.net
> > >To: amradio at mailman.qth.net
> > >Subject: [AMRadio] RE: Receiver update.
> > >Date: Tue, 05 Feb 2002 22:24:03 -0500
> > >
> > >Hello all AM'ers.
> > >My home brew receiver is coming along.
> > >I got the LO working well, the mixer works also,
> > >that surprised me!
> > >I built 3 stages of IF amplification, and did experiments
> > >with circuit values and component types.
> > >I had some sort of oscillation at times, caused by excessive
> > >plate voltage on the tubes and un-grounded IF transformer cans.
> > >
> > >I also tried the mechanical filter I have, and it seems to work
> > >well but is somewhat lossy...need to experiment a bit with that.
> > >
> > >A good spectrum analyzer has been incredibly helpful, and
> > >I am lucky to have a very good one through work.
> > >It enables me to see things, measure things, and makes a great
> > >frequency counter as well.
> > >
> > >I am working on the detector now, and may be able to actually
> > >listen to something soon.
> > >The RF amp is waiting for coil stock, so that will be a while,
> > >but the receiver picks up the signal generator
> > >turned all the way down and not hooked up to the receiver.
> > >
> > >I still have the agc, S meter, manual IF gain control,
> > >manual RF gain control, muting circuits, and the rf amp
> > >tuned circuits to do, but I am surprised its coming along
> > >as well as it is.
> > >
> > >Anyone got any good octal TUBE type detector circuits?
> > >I have one off the web, low distortion am detector,
> > >but it does not list the tube types.
> > >Its a diode (tube) followed by a triode amp, output
> > >taken off the cathode and the rf filtered out.
> > >
> > >Tonight, my Scott SLRM blew out its mixer tube filament
> > >while listening to 80 meters.
> > >Its been a long time since I blew a tube out in anything.
> > >
> > >Figures its one I don't have a spare for (12SA7)!
> > >
> > >
> > >Brett
> > >N2DTS
> > >
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