[ARC5] Drift in BC-453 - more

[Bill Cromwell]

Hi Mike,

With millihertz specs for JT and WSPR the drift in the frequency counter 
added to the drift in the BFO added to the drift in the HFO could fail 
to show any problem at all. Or show problems that aren't there. I am one 
of those archaic hams that still rely on WWV. From what I have read 
fairly recently (past few years) WWV is useless too. I have shrugged my 
shoulders and walked away from the millihertz modes.

Doing the best I can with only the Bureau of Standards to guide me.

73,

Bill  KU8H

On 12/12/2017 09:57 AM, MICHAEL ST ANGELO wrote:
> Folks,
>
>
> Instead of guessingabout the drift  why don't you hook up a frequency
> counter and measure the drift? If you don't have one there are lots of
> $15 dollar counters on Ebay.
>
> Use light coupling, a small capacitor to lightly load the circuit. Thus
> also blocks the DC from the counter.
>
> Mike N2MS
>
>
>
>> On December 11, 2017 at 5:23 PM "Kenneth G. Gordon" wrote:
>>
>>
>> On 11 Dec 2017 at 20:50, J Mcvey wrote:
>>> Are you really going to notice a 5 hertz/ minute drift?
>>
>> Hmmm....doubtful... Might....
>>> A WSPR session is two minutes. The drift is significant to that
>>> demodulation time.
>>
>> Yes.
>>> It doesn't affect SSB or CW that much. I'm not exactly tone deaf, myself.
>>
>> I was thinking more of short-term drift...not drift over 2 minutes or
>> more.
>>> Rather than speculate, try it .
>>> If yours works great, then I will know that I have an unusual
>>> situation. Both my
>>> R23 AND BC453 seem to have the same ailment.
>>
>> OK. Will do, and I'll report here.
>>
>> Ken W7EKB
>>
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-- 
bark less - wag more