[TenTec] Argonaut 509

[ROLAND HOWELL]

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 at bellsouth.net>
To: "Discussion of Ten-Tec Equipment" <tentec at 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 at 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 at 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 at 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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