[Milsurplus] R-174 & Antenna Sections

[Tom Norris]

On Jun 19, 2008, at 6:18 PM, Michael Tauson wrote:

The R-174/GRR-5 done did arrived ... Some dastardly
heathen split the case so the receiver and power supply sections are
no longer joined.


This is *almost* a Mil Approved mod as the manual suggests the thing  
can be
operated without the power supply and cabinet if need be.

As outlined in Chapter 4, (Theory of Operation) section II, (Receiver)
part 68 (Monitoring Operation) paragraph d of TM 11 - 295, August 1952,
(page 56) sez --

"It is possible to use Radio Receiver R-174/URR without Power Supply  
PP-308/URR.
For this purpose, A+, B+, B- and ground connections were brought out  
to J1.
1 - For such operation, the positive terminal of the 1.5 vold d-c (A 
+) source should
connect to pin H and the negative terminal (A_) to pin E (ground)   
The positive
terminal of the 90 v d-c source (B+) should connect to pin K and the  
negative terminal
(B-) should connect to pin J.  Also it is required to connect a 160  
ohm resistor across
pins 8 and 10 of J4.
2 - [suggestions that a suitable cabinet should be used, etc] "

Who knows if was a ham hack?  Probably *was*, though.  ;-)

Tom NU4G