[HBR] IF transformers

[Peter Bertini]

I'm playing around with the R-23 80kHz transformers. Boy, they don't
appear to be very high Q, and use a high L to C ratio.  I assume this
was done to control the bandwidth for AM reception? Also, I have a
question about the button silver mica caps and the old dogbone style
ceramic caps that were used.  I know these were good caps back in the
late 30s and early 40s, but I wonder if it it would be good practice
to replace them with newer 180pF dipped micas since these components
are now 60 years old?

Pete

On Sun, Sep 28, 2008 at 9:11 PM, Bob <bob at atl.org> wrote:
>
> Harry Lythall - SM0VPO has some homebrew IF transformer
> info under
> reference: data technique: DIY IF cans
>
> http://web.telia.com/~u85920178/
>
> I should have photos of my HBR soon. It's got to go. No more room and if I
> do well enough this semester to get into nursing school, no time for the
> next few years.
>
> -Bob
> AH7I Atlanta/Honolulu
> ************************************
> Visit the HBR Receiver Web Site with over 100 pictures of receivers and
> construction notes...... via http://www.qsl.net/k5bcq/
> there is also a mirror (faster response)at http://k5bcq.edebris.com/
>
>
> Retrieve reflector archived data via http://mailman.qth.net/mailman/listinfo/hbr
>
>