Topband
[Top] [All Lists]

Re: Topband: MFJ 1025

To: W2pm@aol.com, R.Gorski@Astronautics.com, topband@contesting.com
Subject: Re: Topband: MFJ 1025
From: Earl W Cunningham <k6se@juno.com>
Date: Mon, 8 Jan 2007 13:21:24 -0800
List-post: <mailto:topband@contesting.com>
W2PM wrote:

"I actually use a preamplifier on my noise antennas altho I don't always 
need to use it.  Whenever I cannot achieve a null, popping in some
amplification often solves it.  The preamp on the 1026 btw is NOT useful
for this purpose as it's hard wired to the internal whip on that model."
==========
The MFJ noise cancellers require the the signals from both antennas  are
equal level.  That means that with the 1025 that the "noise" antenna
needs a preamp because it is usually a smaller, non-resonant antenna. 
There are "gain" controls on both antenna inputs that allow you to
precisely adjust it so that the signals are equal on both inputs.

The 1026 has a built-in preamp for the "noise" antenna input that *is*
able to be used with the built-in whip antenna *or* an extenal 
"auxiliary" antenna.

I recommend the 1026.  The extra $10 or so that it costs is insignificant
and well worth it for the built-in preamp.

73, de Earl, K6SE
_______________________________________________
Topband mailing list
Topband@contesting.com
http://lists.contesting.com/mailman/listinfo/topband

<Prev in Thread] Current Thread [Next in Thread>