Just as an aside, I ran three R-4A/B - T-4X/B stations 24/7 for over
three years in autostart RTTY service. This often involved full power
RTTY operation in excess of 30 minutes. Small fans on the back of the
transmitter cages, but none on the receivers. The entire setup only
had ONE failure over that period, a 12BY7 that developed an open filament.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
GALE STEWARD wrote:
A couple of other things to consider. In the R4C - if you upgrade to the
Sherwood audio amp and product detector, you can unplug two tubes (less
filament current). My rcvr also has the blue LED dial lamps which saves a bit
more. I still run a small 12V fan that sits on top of the rcvr. a little air
movement makes a LOT of difference.
73, Stew K3ND
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