[Amps] GS23B Plate load resistance for HF

[TexasRF at aol.com]

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 at 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
_______________________________________________
Amps mailing  list
Amps at contesting.com
http://lists.contesting.com/mailman/listinfo/amps  

_______________________________________________
Amps mailing  list
Amps at contesting.com
http://lists.contesting.com/mailman/listinfo/amps