[Milsurplus] Low B+ receiver operation

[WF2U]

Tom,

It's true that the R-808/GRC-14 uses low voltage tubes similar to the R-392,
but the actual weight of the R-808 is 71 pounds.
While we're on the weight subject, the T-631/GRC-14 transmitter weighs 157
pounds and the PP-1711/GRC-14 power supply (for the transmitter and both
R-808 receivers in the GRC-14 system  is 284 lbs. The system can be powered
up by either  nominal 26.7 VDC or 115 VAC. The down side is that when it's
operating from 115 VAC, the transmitter still runs on a 24 VDC input
dynamotor, but the 26 VDC is produced in the PP-1711  from a built-in 115
VAC to 24 VDC linear power supply... That's why the PP-1711 is so heavy - it
contains both the 26 VDC/ 50 A supply and a humongous dynamotor (the
transmitter, fully plate modulated is rated at 100 W carrier output - 4CX250
PA, modulated by a pair of 4CX250's), plus control circuitry.

73, Meir WF2U
Gowensville, SC

 -----Original Message-----
From: 	milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net]  On Behalf Of Tom Norris
Sent:	Monday, July 19, 2004 12:09 PM
To:	milsurplus at mailman.qth.net
Subject:	Re: [Milsurplus] Low B+ receiver operation


.......The Marine Corps R-808 used similar low voltage tubes, so
I've been told, though the radio is nearly as heavy as a T-195.
I shudder to think what the matching GRC-14 transmitter weighs
if the receiver is 130 pounds or so...

73

Not NU4G