[TowerTalk] Tuner SWR won't stay down

[W3YY]

The other tuner worked and your new MFJ didn't.  Sounds like whatever you
are trying to match is outside the range of the MFJ, but OK with the other
tuner you put in line.  Without further data, that's my initial impression.
GL.

73, Bob - W3YY


-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Tom
Osborne
Sent: Thursday, January 01, 2015 3:09 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Tuner SWR won't stay down

Hi

I picked up an MFJ-989C tuner that has a problem (don't want to hear about
'mitey fine junk).

The problem is that the SWR goes down and then slowly creeps back up.

I got a new roller inductor and installed it and the SWR still doesn't stay
low, even at low power.

I took the roller inductor out and put in a switch/coil combo to eliminate
the coil problem.  SWR still climbs up.

Bypassed the SWR circuitry and ran the input from the antenna directly to
the capacitor.  Still won't stay low.

I thought it might be the SWR circuitry but I put another tuner in front of
this one and when I tune the SWR down with the other tuner, it stays down,
so don't think it should be the SWR circuit.

This really has me puzzled.  Can't see anything left to check.  Any ideas?
Thanks and 73 Tom W7WHY

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