OK, I bite: what is BDV?
73,
Gerald K5GW
In a message dated 10/31/2013 9:33:39 A.M. Pacific Daylight Time,
keepwalking188@yahoo.com writes:
What BDV does the GS35b typically show on "good" tubes?
73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie
-----Original Message-----
From: Bill Turner
Sent: Thursday, October 31, 2013 10:14 AM
To: Amps
Subject: Re: [Amps] GS23B Plate load resistance for HF
ORIGINAL MESSAGE: (may be snipped)
On Thu, 31 Oct 2013 09:02:26 -0000, GM3SEK wrote:
>There is a major difference between the Western high-mu triodes and the
>Russian family of low-mu triodes. High-mu triodes like the 8877 are
>designed to deliver good gain and efficiency at relatively low anode
>voltages, but the GS35b requires much higher voltages. Performance at
>anything below 3.0kV is sure to be disappointing, and the best overall
>performance is generally obtained at about 3.5kV on load, rising closer
>to 4.0kV off-load. Some specimens will tolerate higher voltages but with
>a rapidly increasing risk of arcing.
>
>
>73 from Ian GM3SEK
REPLY:
That's good to know Ian, but the spec sheet I have says the max DC is 3kV
and the max instantaneous peak is 6kV. I'm sure those values can be
exceeded
a certain amount but one would be getting into risky territory. On the
other
hand, the tubes are so cheap it might be worth the risk. I know some folks
are running them at 4kV with no apparent problems.
Thanks for the info.
73, Bill W6WRT
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