[Heathkit] Audio filter on HR-10B

[Jim Brannigan]

----- Original Message ----- 
From: "TJRachwal" <tjrachwal at comcast.net>
To: <heathkit at mailman.qth.net>
Sent: Tuesday, July 04, 2006 9:03 AM
Subject: [Heathkit] Audio filter on HR-10B


> Hello all,
> After posting about mods for improving CW selectivity and other mods 
> and receiving many responses I decided to follow the advice of adding 
> and audio filter rather than making mods to the HR-10B.  It was a 
> good move and a very good suggestion.  I opted for the SCAF filter 
> from Idiom Press rather than the MFJ much cheaper filter.  The filter 
> arrived within three days (Oregon->Mihigan) and in about 15 minutes 
> was hooked to the HR-10B.  Wow!  The performance difference is 
> amazing!  It wasn't "quite" the same as the 500 hz filter but leaps 
> and bounds over the "wide as a barn door" front end in the HR-10B.  I 
> could copy CW stations clearly that were down in the mud without the 
> filter and not workable.
> Since I didn't have an MFJ to compare it against I can't say the 
> SCAF by Idiom press is any better but it has made the use of the 
> HR-10B much more enjoyable and I look forward to many FB CW QSOs with 
> the DX-60B, HG-10B and HR-10B.  By the way, an xtal calibrator 
> (HRA-10-1) is on the way for the HR-10B; station complete!
> HR-10B $80.00; SCAF wired and tested $140.00; enjoyable QSOs, 
> memories of days gone by....priceless!  Thanks to all for their 
> advice and help.
> 73....Ted K8AQM
> 
> 
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