[Amps] HB amps

[Will Matney]

My guess G-G for 600. I was thinking myself of building one of these with 813's since they're still making them. Shugang Tubes in China is making them and the 811 I believe. I have a design I had started on for using (4) 813's running grid driven or G-C that I never did finish.

Best,

Will

*********** REPLY SEPARATOR  ***********

On 3/3/06 at 9:36 PM Mike Bondarev wrote:

>Hi Gary!
>
>> A pair of 813's will easily produce 600 watts output and do it for years
>and
>> years. They are very rugged tubes. I have an amp with a pair of them
>that I
>> built in the mid 60's and it still has the same pair of tubes. At one
>time I
>> ran them with over 3000 volts on the plates for several years with the
>> plates regularly showing color and power out well above 600 watts.
>> The same tubes now run at around 2500 volts and still put out 600 watts
>and
>> no color.
>
>> Not the best tube in the world but for the price and as rugged as they
>are
>> they are hard to beat.
>> They will perform well on a wide range of voltages too. 2000 to 3000
>volts.
>
>> 73
>> Gary  K4FMX
>
>
>Is it GG or GC ?
>
>Regards, Mike RL3BM
>
>
>_______________________________________________
>Amps mailing list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps