Hi Bob and Winston
Thanks so much for responding to my question, i think i have one of
those oriental counters somewhere! and i might just add that in with the
radio and let him do the work.
I have too much on my plate as it is, got to redo the PTO from the 515,
think i have made an error during reassembly, it is nice and smooth
after removing the hardened grease but the pointer hasn't lined up as
expected, i followed my strip down notes but still bopped a drollock
somewhere.
73
Snowy G0HZE
------ Original Message ------
From: "Winston" <jones_winston@bellsouth.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Saturday, 3 Apr, 21 At 21:46
Subject: Re: [TenTec] Argonaut 509
This one doesn’t have offset adjustment, but may have trimmer for
calibration. Parts so small, haven’t located it yet.
Sent from my iPhone
On Apr 3, 2021, at 1:26 PM, Bob McGraw K4TAX <rmcgraw@blomand.net>
wrote:
Usually those counters have provisions to set the IF offset such that
it reads correctly. Then one can calibrate it to the closest Hz or so.
The true accuracy depends on the counter time base accuracy and
stability.
Bob
Sent from my iPhone
On Apr 3, 2021, at 12:10 PM, Winston <jones_winston@bellsouth.net>
wrote:
I bought a cheap Chinese frequency counter bar from eBay. I wired the
counter input to the output terminal from the PTO box on my 509. It can
be reached by sliding open the bottom cover on the radio cabinet.
I knew the MHz readout would read wrong since it’s the injection
frequency, but I could use four lowest digits (for example, 330.5), plus
the known MHz from bandswitch, to determine my exact frequency, to
hundred hertz.
However, the readout was 300 hertz lower than the actual frequency. I
couldn’t find an adjustment on the counter to zero it, so later
disconnected it. It was only a temporary test setup. My plan was to
mount the counter in a box, and use cables with RCA phono plugs to get
12V operating power for counter, and rewire the 509 AUX phono jack to
bring out the VFO signal.
I haven’t done anymore work on it, but may get back to it sometime.
-de K4CWQ.
Sent from my iPhone
On Apr 2, 2021, at 2:41 PM, ROLAND HOWELL via TenTec
<tentec@contesting.com> wrote:
Good Evening Gents
Question for you, is it possible to fit a frequency counter to the above
radio, It would nice to know what the actual 'F' is in relation to the
scale.
If anybody has done this mod, please advise and if possible supply
connection details, although the radio is sold i would like to supply
the new owner with as much info as possible.
73
Snowy G0HZE
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