[Collins] 399B-5 crystal osc adapter

[Dave Brown]

OK- Tks for comments Jerry. - And Dave, the CRA has no specific info 
on where it was mounted- just a pic of the unit-same as per WA3KEY.
It was fairly obviously a plugin replacement for the 312B-5, in so far 
as it must have used the VFO power connector.  But it would have to be 
mounted clear of the noise blanker on the lid and there's not a lot of 
room on there to put anything else with the 136B-2 in place. I have 
had a direct email that suggested it may have been mounted on the side 
of the PA cage - which seems likely-can anyone else confirm this? A 
photo of one in place would be great-I thought maybe the installation 
instructions may have had one.

73
Dave, ZL3FJ



----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at ispwest.com>
To: <collins at mailman.qth.net>
Sent: Monday, September 11, 2006 3:18 AM
Subject: Re: [Collins] 399B-5 crystal osc adapter


> On Mon, 2006-09-11 at 00:28 +1200, Dave Brown wrote:
>> Does anyone have the installation instructions for this unit? I'm
>> interested to see how/where it was intended to mount in the KWM-2.
>> 73
>>  Dave, ZL3FJ
>>
>>
> http://www.ipass.net/hockaday/radio.html offers instructions and 
> crystals for a price.
>
> http://www.surplussales.com/Manuals/man_col.html offers the manual 
> for a
> price.
>
> I didn't find mention in the military KWM-2 manual I have 
> downloaded.
>
> Digging in the KWM-2 schematic in my Yellow Book, there is an 
> external
> VFO connector. That applies power and has voltages available only in
> receive or transmit to allow switching. The pictures I found on line
> show separate RF cables with considerable length. With the crystal
> switch on the 399B-5 it has to be reachable with the lid lifted. It
> might well mount on the lid like the KWM-1 noise blanker.
> -- 
> 73, Jerry, K0CQ, Technical Advisor to the CRA
> All content copyright Dr. Gerald N. Johnson, electrical engineer
>
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