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Re: Connectors for dish feeds



Hi Bruce:

BNC connectors are very poor above 70 cm.  If you need to use a smaller
connector than an "N", try using an SMA connector.

73,

Woody
KJ4SO

----- Original Message -----
From: "Bruce Nolte N3LSY" <brucenol@abs.net>
To: <amsat-bb@AMSAT.Org>
Sent: Tuesday, May 28, 2002 9:23 PM
Subject: [amsat-bb] Connectors for dish feeds


> I  have built a couple of feeds for my 3 foot offset fed dish, based on
> the designs of K5OE and K3TZ  helical and patch feeds. One variation
> from their design I made was to substitute BNC connectors in place of
> the N connectors in their design, primarily because I had plenty of BNC
> Chassis connectors, and no N connectors at hand.  From the connector at
> the feed, I made a short jumper of RG8X Flex to the downconverter. On
> the feed end, I use a BNC connector, and on the other end I use an N
> connector designed for use with RG-8X.
>
> I wonder if it would be worth my while to redesign my feeds to use
> N-connectors and a lower loss cable. Based on the information I could
> glean off of Google, I can expect only 0.1 dB of improvement in loss by
> upgrading the short (8 inch long) jumper between the feed and the
> downconverter from 8X to something like LMR 400. Can I expect any
> improvement in signal by upgrading the connectors?
>
>
>
> ----
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>

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