[ARC5] Drift in BC-453 - more

[MICHAEL ST ANGELO]

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
> 
>     ---
>     This email has been checked for viruses by Avast antivirus software.
>     https://www.avast.com/antivirus
> 
>     ______________________________________________________________
>     ARC5 mailing list
>     Home: http://mailman.qth.net/mailman/listinfo/arc5
>     Help: http://mailman.qth.net/mmfaq.htm
>     Post: mailto:ARC5 at mailman.qth mailto:ARC5 at mailman.qth .net
> 
>     This list hosted by: http://www.qsl.net
>     Please help support this email list: http://www.qsl.net/donate.html
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20171212/d345ca24/attachment.html>