[ARC5] 10-Meter 274N RX - The 20-27 RAT-1

[gordon white]

     I have five RAV receivers, 190-550, 520-1500, 1.5-3 and 13.5-20 
and20-27. The serial numbers, both stamped on the backs and written on 
the ID plates, are "B-1" and "B-2" These all came out of the morgue in 
Boonton and are stamped "M" in a circle.

If memory serves I found a few other production RAV receivers that I 
gave to the NASM.

The RAV receiver decks under the covers are unpainted.

    Also  I //have a preliminary set of instructions for the "XRAT" 
receivers that of course became the RAT series. These are dated 
December, 1939. My RAT receivers themselves have contract datesof June, 
1939, NOs-67258. I have never seen an XRAT-marked receiver.

     These instructions confirm what I wrote earlier that each set of 
two receivers included a switch panel (with SENS and CW/OFF/MCW 
controls) AND a switch panel adapter for each receiver. Each receiver 
also came with a crank-type and a knob-type localtuner.

     It is clearthat the XRAT receivers were the immediate follow-on to 
the Type K prototypes, furnished the Navy under contract NOs-64476..  
The gain control of the XRAT is described as differing fron the type 
K/"so that the AUTO-MANUAL swit//ches used in Type K are not required. 
This new type of gain control is essentially a manual gain control for 
signals of such magnitude as not to produce serious overload, and is a 
kind of automatic gain control, arranged to prevent blocking of the 
receiver, for stronger signals."/

  - Gordon White