[Amps] Is after-powerdown cooling desirable?

[Peter Voelpel]

The Eimac data sheets of those tubes don´t say so.
All the Henry amps with that tube don´t do so and the Racal TA1800 with its
4CX10000D doesn´t do it either.

The data sheet of the 4CX15000A says air flow should be maintained for a
short period of time after all power is removed to allow for tube cool down.

73
Peter, DJ7WW


-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Jim Thomson

## the Eimac notes say to use "blower over run"  on all these big metal,
external anode tubes, at least those
with directly heated fils...and when done for the session, put amp into
standby, then shut off B+, then shut
off the fil.  The blower is to stay on for  10-15 mins.