[R-390] VFO / BFO with no ballast.

[Bob Camp]

Hi

Actually if you want to check it out here's how to do it:

Fire up your GPS and take it's 10 MHz output or what ever frequency it 
comes out with into the front end of the radio. Tune it in with the BFO 
on and then feed the audio output into your PC. Run a spectrum analysis 
program on the PC. There are lots of free ones out there. If you get 
one with a waterfall display then you can watch it drift in real time.

	Take Care!

		Bob Camp
		KB8TQ


On Jul 7, 2004, at 9:58 PM, Tom Norris wrote:

> Now to get a decent freq counter that I can synch to my GPS standard
> and check the drift with and without. Not sure it is worth the trouble
> though, I doubt if I can find any difference. Be neat the lock the
> crystal oscillators in the thing to the 10 mhz standard though.. hmmm.
>
> But, Bob and group, I've notice no discernable differences with jumpers
> and 12BA6's or with a resistor. I think the main thing is that the 
> ballast
> was indeed designed to compensate for the variety of mains voltages
> the radio was likely to encounter in the field and with reasonably 
> stable
> home AC power, it is not likely to be of much use.
>
> T
>
>
>> Hi
>>
>> I have radios with both setups (ballast and no ballast). I can see 
>> absolutely no difference between the two as far as stability.
>>
>> 	Enjoy!
>>
>> 		Bob Camp
>> 		KB8TQ
>>
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