Just some quick tests on my configuration, Omni VII and Centurion:
80M 3500 1.7
80M 3900 1.8
40M 7000 1.5
40M 7300 2.2
20M 14.00 1.1
20M 14.30 1.1
15M 21.10 1.2
10M 28.35 1.3
Numbers are at 100 watts out of the Omni VII. Do note that the TUNE
adjustment on the amp does make and reflect changes to the SWR at seen at
the radio.
Numbers look about right to me. Doesn't give the radio any problems as I
see. Might change the length of the cable between the radio and the amp to
see if it improves anything. Collins requires some 11 ft between the
transmitter and the 30L-1 amp.
73
Bob, K4TAX
----- Original Message -----
From: "K0BX" <k0bx@arrl.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Tuesday, February 24, 2009 8:01 PM
Subject: [TenTec] 422 HF Amp Input Low Pass Filter Board question
I received a TT 422 HF Amp a few weeks ago. Everything seems to work
well but I found one problem that maybe someone can help me.
When I go to 40 meters the SWR between the rig and the amp is about 2.2
to 1 at 7.000 and down to 1.6 to 1 at 7300 KHZ.
All the other bands the SWR is flat.
The SWR is present even when I am on the dummy load. 40 meter antenna
is flat.
My Question is - Should I just order a new board from TT? It looks
pretty easy. But before I do, I just wanted to see if anyone else had the
problem and what was the solution. and yes the 15/10 meter input board
is installed.
TU
Joe K0BX
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