[Milsurplus] Bomac JAN-CBNQ 6322

[J. Forster]

OK. Relatively low frequency. UHF RADAR.

I'm not so sure the adjustment is supposed to be tinkered with. I cannot
offhand think of a proceedure to adjust it in a RADAR without a boxfull of
mixer diodes to blow.

I think the 1285 MHz is the upper limit of frequency, not the operating
frequency. The screw is to adjust the breakdown voltage, not a frequency
adjustment, IMO.

-John

===================


> After reading John's reply as to purpose and function, I was
> still curious about the screw adjustment.
>
> Checked in Ludwell Sibley's Tube Lore and found:
>
> 6322   [AKA BL-25]; TR tube, 1285 MHz tunable, 450 kW (BL)
> (6-17-57).
>
>
>
> Brad  KD7GDT
>
>
>
> On 7/10/2013 12:45 PM, J. Forster wrote:
>> Almost certainly, a T/R switch used to protect the mixer diodes in a
>> RADAR
>> from the 'big bang' transmit pulse. They are generally gas filled and
>> may
>> contain a small radioactive source to stabilize the firing point and/or
>> a
>> keep-alive electrode.
>>
>> Best,
>>
>> -John
>>
>> ===============
>>
>>
>>> I have found a Bomac JAN-CBNQ 6322 in my junk box.  This is a small
>>> tube
>>> like component that resembles a vacuum cap but believe it is used in
>>> radar
>>> sets to isolate the receiver from damage.  Thee is a screw adjustment
>>> on
>>> one end that appears to change the gap between the two internal
>>> electrodes.
>>>
>>> Any information appreciated and where this is used.
>>>
>>> Thanks
>>> Dave  K5MWR
>>>
>>> Sent from my iPad
>>> ilsurplus at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>>
>>>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>