[ARC5] Drift in BC-453

[J Mcvey]

The LO stability was a  "best estimate" by tuning in a weak beacon and listening for a while. It didn't seem to move much , if at all.
I do have real equipment to measure the LO drift, but i haven't got around to doing anything formal yet.Once i do that, I will share my drift measurements with the group.
BTW the little white compensation cap is present in both.
 

    On Monday, December 11, 2017 1:34 PM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
 

 On 11 Dec 2017 at 18:19, J Mcvey wrote:

>
> Ken,
>
> using the BFO on CW is OK, once the set warms up of coarse.
> However the digital modes mentioned are VERY drift sensitive, so it's a problem.
> I can see the waterfall going sideways just like the guy in the video.
>
> Even after taking the can apart and cleaning the variable cap contactors, things
> did not improve.
> I changed the external blocking cap, but not the internal one which tested OK,
> Maybe that was a mistake?

I don't think so.

> Try wspr and JT  on your equipment and see if you get better results. Wspr is the
> more popular choice.

OK. I'll set it up here and give it a try. I'll report back here what the results are. My 630 meter
antenna is not the best, but since Rudy is not that far from me, I expect decent results.

> The LO appears to be stable.

How are you measuring that?

Later,

Ken W7EKB

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


   
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20171211/85399333/attachment.html>