I agree with Carl.
This is stressing my memory a bit as I bought my Omni A in 1979... but as I
recall, on one of the early pages in the operating manual, Jack wrote that
the gain (or sensitivity) of the radio is intentionally reduced on the low
bands because it does not need to be as high as on the higher bands. If
kept at the same level, you would just amplify the noise along with the
signal. So it begins low and gets progressively higher as we go up the
spectrum.
As to the setting on the dial, I can't remember exactly. It may very well
be that it happens to be the same "indication" for 160 and 80. That is only
an indicator, it is not the same setting because the elevator had different
coils and the radio had different capacitors for different bands. I
wouldn't worry about that.
Being as old as it is, you might want to do a re-alignment of all the coils
anyway. I think the instructions on how to do that were in the manual.
Be careful when adjusting coils. After sitting for so long, they tend to
get stuck. Begin by gently rocking the tuning tool back and forth slightly
to break the adjustment loose. Then once it is turning freely, adjust it as
per the manual.
My buddy still has my old Omni A and has retired it.
I will retire from Spiderbeam in about 35 more days.
Once retired, resurrecting the old Omni-A is on my to-do list.
As is resurrecting my old Argonaut 515.
AS is designing an Interface-Box for the EAGLE to control Amp switching
timing for CW, external REC-ANT, etc.
...which all begins right after I have completed my XYL's Honey-Do List.
73
Rick, DJ0IP
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Carl
Moreschi
Sent: 26 November 2017 03:00
To: Shawn Upton <kb1ckt@yahoo.com>; Discussion of Ten-Tec Equipment
<tentec@contesting.com>
Subject: Re: [TenTec] Omni C on 160
When I had my Omni A years ago, 160 was always less sensitive than other
bands. I would say what you are hearing is normal. 160 has lots of band
noise so being a little less sensitive on that band hurts nothing.
Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com
On 11/25/2017 6:56 PM, Shawn Upton via TenTec wrote:
> Finally added a 135' wire to my Hustler 6BTV so as to see if I could get
onto 160m. Band seems more quiet than 80m--but that could be a number of
factors, I guess. One thing I've noticed though is that the RX preselector
(aka resonate control) uses the same setting as it does on 80m. Is this
normal?
> I also noticed that I have to use "lots" of RF gain, more than on 80m--but
that could be antenna related--but I noticed one eham review that said the
Omni C had low sensitivity on 160m. Is that normal? I don't think I mind,
with my setup I don't need extra gain.
> shawn kb1ckt
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> TenTec@contesting.com
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