[Collins] 399B-5 crystal sock adapter

[Dr. Gerald N. Johnson]

On Mon, 2006-09-11 at 11:12 -0400, Straugh wrote:
> Its get downright amusing.!
> Collins made the 312B-5 and then they made a cheaper version of that without
> the frills, bells and whistles compared to or with the standards of the day.
> No concern over interest in novice license needs; just to operate split.

Way before the S-line there was a novice crystal adapter for the KWM-1.
Sure it worked for working splits then as the 399B-4 and B-5 work for
splits in the S-line and KWM-2.
> 
> Collins then produce the 399B  as  Novice Adapters. The 399B-4 is the
> version to provide tall control in place of the VFO in the 32S-
> transmitters. Sockets were provided for four  tales which were selectable by
> a switch.  The 399B-5 was used in place of the VFO in place of the VFO to
> control the transmit frequency in the KWM-2 transceiver. The receiver
> remained PTO tuned. Tales were not provided with either adapter. They were
> mounted internally and, like the Vex controls you had to lift the lid to
> make your selection between VFO and or select either of the 4 tales.
> 
> Can't speak with regards to the 32S- transmitters but as far as the KWM-2A
> goes, the bloody thing is mounted in the 312B-5 socket. I elected to use the
> Waters  Manufacturing Inc "CHANNELATOR Model # 349" which seemingly is an
> improvement over the 399B-C and provides both transmit/receive tall control
> as well as separate.KWM-2A has been so modified so as to provide dual inputs
> for the 312B-5 which functions normally except that at the Noise Blanker
> ___NB____ slot the 349 is engaged. The 349 allows for either PTO or Tall
> control of the KWM-2A in transmit or receive or transmit tall control and
> PTO on receive or TX on PTO and Receive Tall. Have been using it for years;
> the 312B-5 is not controlled by it and works normally controlled by its
> switches when the #349 is not selected. 
> 
> 
> -----Original Message-----
> From: Dr. Gerald N. Johnson [mailto:geraldj at ispwest.com] 
> Sent: Monday, September 11, 2006 9:38 AM
> To: Straugh
> Subject: RE: [Collins] 399B-5 crystal sock adapter
> 
> On Mon, 2006-09-11 at 10:20 -0400, Straugh wrote:
> > An original manual would have had instructions for use of the unit with
> the
> > M-2. Bear in mind that it was a cheaper version of the 312B-5. 
> > 
> Much cheaper, not external, and required for novice transmissions until
> crystal control was no longer allowed. Still with its 4 or 5 crystals,
> it worked like the 312B-5 for split transceive. The question is where
> was it to be mounted IN the KWM-2. Could it and a noise blanker be
> mounted at the same time?
> 
> It might have been more than mentioned in a early KWM-2 manual, though I
> find no mention of the 399B-4 which fits 32S other than a listing in the
> accessories table in my 32S manuals from early 32S-1 to Rockwell 32S-3A.
-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer