[Heathkit] HL-2200/SB-220 questions...

[jeremy-ca]

The chokes serve two purposes.

1. To slightly raise the grid above ground DC wise by virtue of the 26 Ohms 
resistance and to noticably improve IMD.
2. To act as a fuse in case of an internal tube arc or short.

Leave the circuit as is no matter what you may read otherwise.
The output difference with the grids grounded is negligible since the amp is 
PS limited anyway.

Carl
KM1H


----- Original Message ----- 
From: "Mike Lafferty W2TB" <mikelafferty at verizon.net>
To: <heathkit at mailman.qth.net>
Sent: Thursday, December 14, 2006 6:29 AM
Subject: [Heathkit] HL-2200/SB-220 questions...


> Does anyone have a good answer on why Heathkit does not directly ground 
> the grids on the 3-500Z's?
> Why do they float them with capacitors and RF chokes?
> Should I throw away my caps/chokes and ground the grids to the chassis?
> Thanks.
> Mike W2TB
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