Topband: RX antenna transformer winding

[Charlie Cunningham]

I've also had very good results using wire-wrap wire for winding small RF
transformers. Pretty easy to work with - and it's rugged.

Charlie, K4OTV

-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of
mstangelo at comcast.net
Sent: Wednesday, August 21, 2013 2:01 PM
To: topband at contesting.com
Subject: Re: Topband: RX antenna transformer winding

I use wire wrap wire when winding small cores. The Kynar insulation is tough
and resists nicking.

<http://www.jameco.com/webapp/wcs/stores/servlet/StoreCatalogDrillDownView?l
angId=-1&storeId=10001&catalogId=10001&search_type=jamecoall&freeText=wire+w
rap+wire>

OT: Wire wrapping was very popular in the 60's and the 70's before the
advent of multilayer printed circuit boards.

It was very reliable. The backplane of the Apollo Guidance Compluter was
connected via wire wrap. You can see an example at the Infor Age Museum in
Wall, NJ.

<http://w2dtc.com/2011-0522-infoage/2011-0522-0061.jpg>

Mike N2MS
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Topband Reflector