[1000mp] Internal Tuner with Amp

[Bob Main]

Of course, by the time you got there the band had dropped out and all was
lost.  LOL

Bob

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of Dennis
Sent: Saturday, November 05, 2005 6:03 AM
To: 1000mp at mailman.qth.net
Subject: [1000mp] Internal Tuner with Amp

An added consideration if you use an internal tuner with an amp- 
definitely DON"T use it if you have a bandpass filter in line.
At the various multi-ops I've been at, we've popped several Dunestar 
bandpass filters that way.  The filters are set up using
50 ohms in and 50 ohms out- if you use the tuner and change that they 
don't like it.

As with any tuner, if it hasn't found a match in 20 seconds, turn it 
off.  For some loads, for some reasons, it won't find a
match.  Sometimes, if my tuner can't find a match, I put a dummy load on 
the output, find the match, and then try the tuner
again on the real antenna. 

On an 80M dipole cut for CW and I want to use it on SSB, my tuner hunted 
forever.  I went to the CW portion, matched the
antenna with the tuner, then worked my way up the band, matching the two 
every 50KHz or so.  I could then find a match
when I got to the SSB frequency I wanted.

Dennis NB1B
. 
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