[Heathkit] HR-10B

[Tom NØJMY - AAR7FV]

If it were me, I'd pick up a cheapy audio filter like a MFJ CWF-2 at a 
hamfest and get my selectivity there.  I have one I could part with if 
you can't find one. 

I know a couple guys who replaced the half-lattice crystals in the 
HR-10B's I.F. with a pair that were closer together (around 400 Hz. 
apart) but in my opinion it wasn't worth the hassle.  The skirt 
selectivity was still as broad as a barn door - not even in the same 
ball-park as an audio filter.  Plus, if you like to listen to SSB, 
changing the I.F. xtals distorts the audio pretty badly.

I don't think Doug has seen your post yet.  He got the article from '73 
with the HR-10 mods from VE3HUR who was kind enough to scan them.  They 
are now posted at the following URLs:
http://www.hamnutz.com/w1eof/hr-10mods/  or
ftp://bama.sbc.edu/uploads/

Best of luck, Ted!
Tom


TJRachwal wrote:
> Hello all,
>     I just acquired an HR-10B to go along with my DX-60B.  I haven't 
> yet given it the once over but was just wondering where I could find 
> what mods others may have done especially with regard to CW 
> selectivity.  Is there any direction/web site someone could point me 
> too please?
> 73 es tnx,
> Ted K8AQM
>
>