[Heathkit] Re: Audio filter on HR-10B

[Jim Brannigan]

Interesting, thanks for posting.
W0SR is correct in his review, the thumbwheels are stiff and a bit of a pain 
to use.
He is also correct on the use of an audio filter with narrow IF filters 
(OMNI-VI+ has cascaded 250Hz filters).  The audio filter cleans up spurious 
noise that adds to operator fatigue.

Jim


> Since I like to operate CW I found this thread very interesting so I went
> looking for the Super SCAF.  Based on a quick first search, it could be 
> very
> hard to find the original.  A review of the Super SCAF-1 on eHam.net by 
> W0SR
> in March '03, referred to the fact that Idiom Press is making a new 
> version.
> The reviewer checked it out and made direct box to box, signal to signal,
> etc., comparisons and found the new one easier to use and just as 
> effective,
> if not more so.  HMMM.   I checked it out on this site
> (http://www.idiompress.com/scaf-1.html) and will likely be ordering...
>
> I have no interest in this outfit except making listening to
> CW on my SB-301 even more pleasant.
> Chris
> W7JPG
>
> -----Original Message-----
> From: heathkit-bounces at mailman.qth.net
> [mailto:heathkit-bounces at mailman.qth.net] On Behalf Of Jim Brannigan
> Sent: Wednesday, July 05, 2006 6:40 AM
> To: Ken Kaplan; heathkit at mailman.qth.net
> Subject: Re: [Heathkit] Re: Audio filter on HR-10B
>
> If you can find one, the Super SCAF by Aftronics is a great audio filter.
>
> Thumbwheel switches allow you to adjust the HP and LP frequencies.
> Bandwidth is from AM to very narrow CW.
> A 2W audio amplifier is built in.
>
> Jim