[Amps] Re: GU-84b: Drive power required for full power output ?

[DF3KV at aol.com]

In einer eMail vom Do, 25. März 2004 18:21 MEZ schreibt frank_goenninger at t-online.de (Frank Goenninger):

>I initially intended to ask if about 1A of input current will be enough
>to really get reasonable power output?
>
>This comes from a simple calc from Pout of the TRX, which is about 100W
>producing about 1.4 A of current into 50 Ohms.
>
>Also, for this tube, what type of input circuit would you recommend when
>trying to cover all bands up to 30MHz ?

Hi Frank,

Since this is a tetrode it will be run without grid current, 
the driver does not need to deliver current, just voltage.
Typically the grid is loaded with a 50 Ohm dummyload, into
which drive voltage developes without tuned circuits.
For the higher bands you probably have to compensate the high
input capacity with a small coil in parallel.
I guess you will need not more then 25W drive for full throttle.

73
Peter