[Milsurplus] [Boatanchors] Hallicrafters and A-Bombs (Hello, NSA and HSA!)

[Mike Hanz]

Nope.  The radar altimeters were in the 400mHz range.  

Three AN/ARR-5 receivers were used in whatever Silverplate airplane was designated the instrumentation aircraft for each mission, with the task of dropping three parachuted pressure instruments to monitored the pressure wave created by the weapon.  With that data and knowing the altitudes and positions of the three canisters, it was possible to calculate the size of the over pressure pulse and thus the yield of the weapon.  The instrumentation aircraft preceded the weapon carrier, IIRC, to allow the canisters time to descend a bit from the high altitude the aircraft were flying. The canister frequencies were clustered around 50MHz or so...somewhere back home I have the specific freqs involved from a LASL report years after the fact.  So, the S-36 was probably in the rack to permit calibration of the pressure sensors for testing.

73,
- Mike  KC4TOS



> On Mar 30, 2014, at 11:01 AM, "David Stinson" <arc5 at ix.netcom.com> wrote:
> 
> I guess it would work better with the link:
> 
> http://www.alternatewars.com/Bomb_Loading/Bomb_Guide.htm
> 
> The receiver is an S-36, so likely to listen to the altimeter transmittters. 
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