October 29th 07, 08:12 PM
posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Sep 2007
Posts: 52
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Cushcraft R5/R7 Matching Network (MN-7) Rebuild (more)
Jim-NN7K wrote:
Also, for repair of the traps them selfs, check out
http://www.telusplanet.net/public/te...craft_trap.htm
Might try this page (from EI7BA)- Lots easier to read!
http://www.iol.ie/~bravo/r7_vertical.htm
And think should act the same, electrically, Jim NN7K
gb wrote:
This article describes how to rebuild a matching unit of a Cushcraft
R5 vertical -- by --G0WCW
http://www.mrs.bt.co.uk/mrs/r5/
Nice work!
http://www.mrs.bt.co.uk/mrs/r5/DSCN2478.JPG
Enclosure
The box is from maplin, product number YM91Y and is one of their 'IP
enclosure' range. The box is 150 x 110 x 70mm in size (product codes
YM91Y - grey, YM93B - grey with clear lid). Cost is around six UK pounds.
It is physically the same size as the Cushcraft variant, but the PCB
has to be slightly 'nibbled' at the corners to get it to fit inside
the newer box. I'd say the original Cushcraft enclosure isn't that
good as they used steel screws into brass fixings. The screws rust
over and then shear off. In my view, the Maplin IP enclosure is a
better solution to outdoor use (IP56 rated).
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