[ARC5] hiroshima A bomb

[J. Forster]

Yup, but a minor correction.

The APS-13 is a pulse RADAR, not pulse modulated. Only a single pulse, not
anything more complicated, like a pulse train.

-John

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


> The wobulator was used in the CW FM APN-1 radio altimeter.  I have a
> Soviet
> copy of the system complete with wobulator.  The bombs used the pulse
> modulated APS-13 "Tai end Charlie" system.
>
> John  WA4WDL
>
> --------------------------------------------------
> From: <MillerKE6F at aol.com>
> Sent: Friday, April 09, 2010 3:16 PM
> To: <arc5 at mailman.qth.net>
> Subject: Re: [ARC5] hiroshima A bomb
>
>> I believe it was one of the radio altimeter units that showed up on the
>> surplus market in the late 40s to early 50s.  The prized part in the
>> unit
>> was
>> the "Wobulator" which was a nifty little split stator capacitor
>> deposited
>> on  a bowl shaped ceramic that was attached to a PM speaker scheme that
>> that
>> formed  the moving (pseudo rotor) part of the capacitor.  They formed
>> the
>> FM
>> part  of the altimeter transmitter.  Can't recall the nomenclature, but
>> they were  cheap items at Standard Surplus on San Francisco's Market
>> Street.
>> Usually less than 5 bucks with dynamotor, wobulator and toooobs.
>>
>>    Bob, KE6F
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