[Amps] AL-811 & 572's

[mitch cox]

With the air flow through an AL-811 I don't think I would push it any farther than the factory specs. You have only improved the tubes at this point, the puff of air that the factory fan is giving you is not enough to keep things cool above these figures and it is doubtful that even at these figures the plate transformer and caps would last very long with increased stress on the power supply running at a constant state. You would need to drastically improve the air flow, which wouldn't take much.
----- Original Message -----
From: "Thomas F. Giella NZ4O" <nz4o at tampabay.rr.com>
To: "amps @ COL" <amps at contesting.com>
Sent: Friday, January 21, 2011 12:50:06 PM
Subject: [Amps] AL-811 & 572's

I have an AL-811 running 572B's instead of 811's. The manual says for RTTY 
mode to use a maximum of 150 ma on the grid and 400 ma on the plate for the
811's.

What would be the maximum grid and plate current that I could use on the 
572B's on RTTY?

73 & GUD DX,
Thomas F. Giella, NZ4O
Lakeland, FL, USA
nz4o at tampabay.rr.com

NZ4O Solar Space Weather And Geomagnetic Data Archive: http://www.nz4o.org
NZ4O Daily LF/MF/HF/6M Radiowave Propagation Forecast:
http://www.solarcycle24.org


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