[Moon-net] Fw: Lifetime of GS35B, your experience? WA6PY comment..

[Nanko de Vries]

----- Original Message ----- 
From: "Bodo Heyl" <bodoheyl at gmx.de>
To: "moonbounceboard" <moon-net at list-serv.davidv.net>
Sent: Tuesday, May 08, 2007 10:49 PM
Subject: [Moon-net] Fw: Lifetime of GS35B, your experience? WA6PY comment..

Hi Bodo
Not mentioned yet is the fact that the tube needs an airflow through the filament/cathode
connections.
Connecting a non conducting tube on the smallest ring , which ends outside the RF box
and pressurizing the cathode compartment with air fom the anodeblower , will cause a low
velocity airflow , enough to keep temperature down.
Cooling the heater/cath. connections is not sufficient because they are connected with rather
long wires to the heater.

Nanko  PA0V