[ARC5] You tube about using boatanchor on digital modes

[J Mcvey]

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 theinternal one which tested OK, Maybe that was a mistake?
Try wspr and JT  on your equipment and see if you get better results. Wspr is the more popular choice.

The LO appears to be stable.
 

    On Monday, December 11, 2017 12:00 PM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
 

 On 11 Dec 2017 at 14:54, J Mcvey via ARC5 wrote:

> https://www.youtube.com/watch?v=AUosY8SThDs
> 
> Can an antique radio be used to pick up digital 
> modes on HF - Part 1
> This started off as a simple photo that was posted to a group when I was 
> working with my National 173 boat ancho...
> 
> His National drifts a lot worse than my ARC and SCR radios.
> I may be golden if I can get the BFOs on them to stay put.

Mac: I don't understand this. How badly is your BFO drifting? In MY experience with the 
BC-453 and/or R-23/ARC-5, the drift is un-noticable. 

I did hear from another user of a BC-453 on 630 meters that the BFO does drift enough to 
make receiving WSPR signals problematic, but he also mentioned that the drift in HIS case 
was due to line-voltage variations causing changes in filament voltage, and when he used 
regulated DC filament voltage, or even batteries, that the extremely minor drift he noticed 
was reduced.

I haven't followed up on that story, and this was a few years ago.

Yet YOU seem to be telling us that the drift you are experiencing is far worse than that.

Would you please elaborate?

When I used my own BC-453 on 630 meters, connected to my computer and using Spectran 
software, I didn't notice enough drift to worry about. But at that time I wasn't trying to receive 
WSPR or JT-9 signals either.

So, what, exactly, is going on at your place?

Ken W7EKB



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