[ARC5] BC-455 IFT - selectivity solutions...

[Kenneth G. Gordon]

On 29 Oct 2014 at 18:47, J Mcvey wrote:

> So, to raise the Q, improving the L6-C12 combo with something better ( 
> higher Q components?) would be the way to do it. Otherwise, it's back to 
> "regen".

Actually, for a hacked-up piece-of-junque like those I am saddled with, 
Mike Murphy's WU2D, crystal-filter really appeals to me. Trouble is, 
finding 2830 KHz rocks... 

I checked with International Crystal Manufacturing and they need around 
$30 each for a one-off. I haven't contacted JAN yet, though.

Since 2830 KHz is actually some sort of marine radio frequency, there 
really ought to be a cheaper source...

In addition, there are several problems with the regenerative IF, amongst 
which is that as the signals you are working with get stronger, its 
effectiveness gets weaker, which is the opposite of what you really want.
 
> Does that make sense?

Yes. I've always liked "Q-Multipliers". I have several, but none on 2830 
Khz....yet.

vy 73,

Ken W7EKB