[ARC5] SCR-183 in an SNJ-4 OH date of 6-53 NASM

[David Stinson]

----- Original Message ----- 
From: "Jay Coward via ARC5" <arc5 at mailman.qth.net>
Subject: Re: [ARC5] SCR-183 in an SNJ-4 OH date of 6-53 NASM


>
> Hello Taigh,
> The "coffee grinder " looks to be for the ARB as it has 
> multiple scales.
>Usually there is a 0-100 scale and a tuning chart some where.

Respectfully, no.
This is definately an SCR-183 grinder
with the MC-282 scale.
The 0-100 scale was an option for earlier SCR-183
 but was seldom used after the -AD variant.
0-100 scale was standard for the RU throughout
 its deployment.

The transmitter has coil C-381 and  is tuned to approx.
3105 KC; the most commonly used
Air-to-Ground frequency in CONUS at that time.
The dual-range receiver coil is in the "LOW"
position and the tuning dial on the grinder suggest
the receiver is tuned to approx. 278 KC, the most
common CONUS Tower-to-Air frequency of the day.

73 Dave AB5S