Re: [TenTec] Frequency accuracy...

["Jeff Griffin" <kb2m@comcast.net>]

 I tried this with my Orion. I seem to be  only 7 Hz off(high 15.000.07) at 
15.000.00. Is this possible? Orion has beem warming up for about 6 hours. 
One odd thing I can only tune to 10.0090.00 on 30m. I try to enter the freq 
via the keypad and I get a 'frequency not supported error' I haven't tried 
to tune WWV on 10 mc in quite awhile, I'm pretty sure I used to be able to 
go there.  Any ideas?
After typing this I just checked it again on 15 mc, I now get an 8 Hz 
error.  Shut Orion off, ate lunch, 40 minutes later turned on and let warm 
up for 5 minutes, I'm now zero beating the WWV carrier  at 15000.026. Not 
bad...

73 Jeff kb2m

----- Original Message ----- 
From: "Martin AA6E" <msembx-aa6e@yahoo.com>
To: <tentec@contesting.com>
Sent: Wednesday, December 29, 2004 10:06 AM
Subject: Re: [TenTec] Frequency accuracy...


> A different method.  Listen on 10 MHz in CW mode and
> press "spot".  You can easily hear the beat between
> your spot tone and the WWV carrier to +/- 1 Hz.  Right
> now, I get 9.999973 MHz, meaning that my TCXO must be
> 2.7 ppm high.
>
> I haven't bothered to dive in to tweak the TCXO.  Is
> that an easy adjustment to find?
>
> In an "SDR", you might think that the master
> oscillator frequency could be tuned from the menu.  In
> a more advanced world, the radio could adjust itself
> to a received standard.  Very little hardware
> required.
>
> 73, Martin AA6E

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