[Amps] Siemens' 3-1000z similar ?

[DF3KV at aol.com]

Felipe Ceglia <py1nb at terenet.com.br>wrote:


>I have in hands a triode, which resembles very much the 3-1000z.
>
>I plugged it into an GG amplifier which uses the 3-1000z and it seemed like 
>the plate capacitance was quite different from the 3-1000z.
>
>Would you have any information regarding this?

What type is it?
Probably a TB4/1250?

None of the Siemens triodes are for zerobias GG, you need
some negativ gridvoltage to reduce dissipation,
otherwise thes work very well in linears

73
Peter