The AH-4 actually matches just about anything as long as it is longer than
7M, the longer the better, but not an even 1/4 wl. There is a spreadsheet
of "forbidden lengths" available in the Yahoo Groups files section.
I intend to run the Omni VI+ on a dummy load today, on every band, but I
saw nothing that made me think the match was a problem. I can imagine
seeing a bad load would "fold back" power but there was nothing to fold.
The 706 matched up just fine, same antenna, same feed line, same tuner,
same connector, etc.
I'll report back if anything develops.
73 de W6OGC Jim Allen
On Mon, Aug 18, 2014 at 9:17 AM, Rick - DJ0IP / NJ0IP <Rick@dj0ip.de> wrote:
> Start with a dummy load.
> Make sure the Omni VI is working OK on the dummy load.
>
> I'm surprised the AH-4 even found a match.
> It is only rated to cover 80 thru 10m.
> I used an AH-4 a lot in the past but I could never get it to load anything
> up on 160m.
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Jim Allen
> Sent: Monday, August 18, 2014 4:12 PM
> To: Discussion of Ten-Tec Equipment
> Subject: [TenTec] 160 Meter Problem
>
> I was sitting in the shack minding my own business last night when I
> noticed
> on the DX cluster that W1AW/5 was on 1821.5 in Oklahoma. I have not tried
> 160M here, but do have a 130' dipole and an AH-4 to match it with, which
> might work, so I thought, "what the hey?"
>
> I got it all set up and could hear W1AW/5 extraordinarily well. I moved up
> the band a bit to tune and ........ nothing. No output whatsoever. I
> checked... traced the coax, antenna connected to wattmeter, wattmeter
> connected to Omni VI+, AH-4 tune control getting power, etc. All seemed to
> be in order. I tried again... nothing. The radio went into tune no output
> no tone, nothing. I switched to 80M, found a clear spot, tuned normally.
> I went back to 160M, nothing. I advanced the power knob from nothing to as
> high as I dared... still nothing.
>
> I then moved to the 706MKIIG, got it going on 160 and made the contact, no
> problem, although I did have to use 100 watts instead of 5.
>
> This is the first time I have tried this Omni VI+ on 160M, but it seems to
> be working just fine on the other bands, very well, actually.
>
> What could this be? Where should I start?
>
> 73 de W6OGC Jim Allen
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