Re: LF: Anyone good with Elsie?

[DK7FC <selberdenken@posteo.de>]

Hi Chris,

Am 23.08.2018 14:38, schrieb Chris Wilson:
> My method of testing
> is a wide band commercial noise source and two series wide band amps
> to up the level to something useable by my SDR, then look at the BPF
> filter action on the display in HDSDR. I have a spectrum analyser but
> am not very good with it, given the comfort I have using HDSDR I am
> probably better keeping it simple! Sound OK?
Yes, sure. You see what you need to see. The perfect tool. I also use 
SpecLab to check filter curves...
For what do you need the BPF? Just for fun or do you have serious 
problems with DCF39 and HGA22? In the last case you may need to put some 
effort in the Q of the coils to get a sharper slope. Hand wound coils on 
pot cores, using RF litz wire seems to be best. I reached a Q of > 500 
if i remember correctly.
But somehow my results have never been really satisfying...

73, Stefan