[ARC5] My 10 meter BC-454...

[Kenneth G. Gordon]

On 24 Jan 2013 at 16:21, Leslie Smith wrote:

> Ken,
> Speaking generally, stability diminishes with the square of the
> frequency, so IF a 3 to 6 MHz receiver is stable within (say) 4 KHz at
> 3MHz,

Actually, it is much better than that. 

BTW, in this case, by stability I meant "mechanical" stability: i.e., if you tap 
on the case, it wobbles. The HFO winding is floating in this abomination.

I'll fix that tomorrow. What I will probably do is to completely rewind all three 
coils. When I finish with them, I'll glue them down so they won't move.

Also, according to the original article, the original tuning slugs are supposed 
to be put back in the coils after they are modified. That has never been done 
for this one. Therefore, it won't tune below 28.2 MHz, but will tune up to 40 
MHz., and the antenna trimmer is supposed to be about centered at the 
high-end of the band, but it is fully meshed instead. Obviously, the 
inductance of all the coils is too low.

Ken W7EKB