Hipot is good for a relative indication but not an absolute one. As the
tube gets hot the BDV can change and the tube can glitch.
Also the GI7BT is easier to cool than the GI7B due to the different
cooler structure & mount.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
On 10/25/19 12:41 PM, Jim Thomson wrote:
Date: Fri, 25 Oct 2019 14:09:48 +0100
From: Alan Ibbetson <alan@g3xaq.net>
To: amps@contesting.com
Subject: [Amps] What limits DC plate supply voltage for GI7B?
<Has anyone tried 3KV or more with a GI7B?
<73, Alan G3XAQ
## Perhaps....if possible.... hi-pot test each tube in question.
Temp bond the grid to the cathode.... then hi-pot between
anode to grid.
## problem is, your next batch down the road might hi-pot test
lower. Install a fast HV fuse in series with a 50 ohm glitch resistor.
Jim VE7RF
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