In article ,
Jaggy Taggy wrote:

On 10/21/05 11:04 PM, in article ,
"Bill" wrote:

Jaggy Taggy wrote:

There is an ARRL Frequency Measurement Test coming up in November and I'd
like to participate.
I'd like to verify my receiving frequency with a frequency counter and
wonder how to best attach that to my TS 830.

Who has done these kinds of measurements and could give advice???

Uwe


About 30 years ago I qualified with my HQ-180A and an LM freq meter.
Didn't need to hook anything together

The problem with a counter and a TS830 is that there are various
oscillators in the 830 that would all need to be summed together to get
into the gnat's hair range. I really don't know how that could be
easily done. I'm thinking old style using an oscillator like the
LM/BC-221 or any good signal generator to beat against the signal and
measuring THAT unit rather than trying to measure the 830.

-Bill


Bill, so you suggest to beat the signal the ARRL will transmit and then to
calculate the signal frequency by using the published transmission
frequency??

In that case I still would need to get the signal generators signal in my TS
830 to beat with the ARRL signal. I guess I could connect the signal
generator to the antenna input. Do I see this right??

Yes, but you certainly don't want a direct connection to the aerial.

Connect the signal generator output to your counter, preferably using a
"T-piece", so that you can plug a short length of wire into the 'T'
to act as an aerial when you want to do the measurement. Then, let
*everything* warm up for at least half an hour so that the temperatures
stabilise in the equipment to reduce drift. Keep the signal generator
a long way off the target frequency to begin with, then tune the receiver
as accurately to the ARRL signal as you can, lock the receiver dial, and
then tune the signal generator until you get a beat note followed by
zero beat against the ARRL signal. (Turn the receiver BFO off when
doing this, so you only have one beat note) . Read your counter at
that point, and it should give you the exact frequency.

The accuracy of your frequency measurement will depend on the accuracy
and stability of the frequency counter, of course.

Chris.

--
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'worst-case scenario'?"
"Isn't that what we call, "having a good day for a change"?"
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