[TenTec] Orion 2 100hz off

ronc at sonic.net ronc at sonic.net
Sun Jan 1 13:20:31 EST 2023


You have probably already done this, but please read my tutorial on tuning
TXCO calibration on the Orion II:


It might be helpful.  Also in the website is my fix for the frequency drift
that occurs during warm-up.


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-----Original Message-----
From: TenTec <tentec-bounces+ronc=sonic.net at contesting.com> On Behalf Of
Scott Sheppard
Sent: Sunday, January 1, 2023 9:53 AM
To: tentec at contesting.com
Subject: [TenTec] Orion 2 100hz off

Thanks Marcus

I should have mentioned that I have duplicated the results using a brand new
Siglent 1032x Sig Gen...it duplicates the results shown with the smaller Gen

It seems that to me, the issue is the actual adjustment ability
(range)  regardless of what it is being measured against. As I say, for a
given signal injected at a freq on 20m band, the lowest tone I can get on my
audio analyzer is about 697 hz...any adjustment whatsoever, and no matter
how careful, causes the tone to rise. You can turn the adjustment screw full
circle through its range and eventually come back to its 'closest setting'
of about 697hz again. I agree that nothing is broken per se, and the radio
works like a champ; if that tcxo began at around 597hz I'd have the range to
fix the issue.

Hope the above makes sense...and I love the reference. That was a great

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