[BC] Lookin fer cheep Optimod HF 9105A, 9100A or B and 8000 for ham/hobby

[Dana Puopolo]

Back in the early '90's, I used a modified MBL-100 with the 7.5 kHz filter on
WHDH-850, Boston. It sounded a bit crunched with our talk format, but made a
BIG difference, particularly at night. The first thing I noticed after putting
it on was the immediate increase in RFI calls on people's telephones. I'm sure
it had to do with increased "talk power".

-D 

------ Original Message ------
Received: Mon, 15 Oct 2007 10:06:08 PM EDT
From: Kevin Tekel <amstereoexp at yahoo.com>
To: broadcast at radiolists.net
Subject: [BC] Lookin fer cheep Optimod HF 9105A,	9100A or B and  8000 for
ham/hobby

R.A. Meuser wrote:
> I would be very surprised if you could find a CRL equal to the 9105A or
> B on line.  There are not that many ever built.

CRL's processor for limited-bandwidth, aggressively-processed Shortwave
use was the MBL-100.  Used examples are uncommon.

I've heard of a number of hams who use an Inovonics 222 limiter with a
simple wideband AGC/compressor ahead of it.  Anything much more than that
is just going to burn up the modulation transformer of an average ham rig;
they were never designed for heavily processed audio.

My bargain buy on eBay a few years ago was a CRL APP-400 mono dual-band
AGC for $65.00.  It sounds good and works perfectly to spec; it didn't
even need a recapping.  CRL's stereo AGCs and Spectral Energy Processors
typically sell in the $150 to $250 range on eBay, depending on age and
functional condition.