[HBR] 85 Kc Ifs at that watery place

[Martin Marris]

Relatively hard to do without a coil winder (because of the large number of
turns compared to, for instance, a typical ham plugin coil; and the
honeycomb winding style). I have a Morris coil winder or you can build your
own.  (I haven't yet used my coil winder, but I have a 1950s "IF transformer
kit" with dozens of forms, cans and slugs and I really should play with it
one day.)

If you want the best IF transformers though I think something like the ARC
cans are going to be better than anything you could make yourself.

One ham who's wound his own IF-style coils using a coil winder is:

http://www.bignick.net/TubeRadio.htm

(scroll down and you'll see pictures of his homebrew Gingery coil winder,
and some of the coils he made with it).

73 de Martin, KB1WSY




-----Original Message-----
From: HBR [mailto:hbr-bounces at mailman.qth.net] On Behalf Of Stan McIntosh
Sent: Friday, February 13, 2015 08:31
To: HBR Receiver List
Subject: Re: [HBR] 85 Kc Ifs at that watery place

Just how much trouble are we asking for if we try to custom-wind a can for a
given frequency?  Sure, I know how to use a dip-meter, but a friend years
ago gave me a baggie full of unassembled IF cans... including empty bobbins
for the wire.

Regards,
Stan
kd4bth
______________________________________________________________
HBR mailing list
Home: http://mailman.qth.net/mailman/listinfo/hbr
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:HBR at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html