[Amps] Power from Pair of Eimac 4 x 150 a / 7034?

[Don Allen]

As a Leading ET aboard a Sumner-class tin can back in the mid-'60s, I 
can assure you the Collins AN/URC-32 HF transceiver needed the 7580W 
tubes in the PA. Whenever the three twin-mount 5"/38 cal. guns, e.g. 6 
guns, would fire in unison, the shock was rather significant.  
Occasionally, when we'd fire a 6 gun salvo to port or starboard, it 
would take a number of pieces of gear off-line, but never the URC-32.  
We always used it for long-haul SSB links - ship to ship, or ship to 
shore.  We had a HF transmitter - a Westinghouse AN/WRT-2 - dedicated to 
the RTTY circuits using four 4CX300 tubes.

Our radiomen sometimes tuned the PA incorrectly , as well as the remote 
antenna tuner, and yet the 7580A tubes never needed replacement in my 2 
1/2 year tenure aboard ship.  Now, the 4X150A tubes in the UHF 
transmitters (known as TEDs) were changed rather often.

Don W9CW




On 12/28/2014 7:27 PM, Carl wrote:
> The 4CX250R was developed for high shock enviroments, military or 
> civilian. The military version was the 7580W and a dual labeled pair 
> was used in the Collins AN/URC-32 shipboard "transceiver" from the 
> early 60's.
>
> Carl
> KM1H
>