Hello all,

I would like to try & build an audio PP output stage using a QQE 06/40 tube.
This is a dual tetrode commonly used in shortwave transmitters.
Does anyone has any experience? Tips? Schematics, perhaps?
TIA!

Best regards,

Frits van Mourik
Geluidsstudio Het Pand,
Vlaardingen Netherlands
www.studiohetpand.nl

In message , David R Brooks
writes
The main point about these RF double tetrodes is that the screen grids
share a common pin. This means you can only use a pure tetrode
operating mode, no ultra-linear, etc.
This isn't necessarily a show-stopper, but something to bear in mind.

"Frits van Mourik" wrote:

:Hello all,
:
:I would like to try & build an audio PP output stage using a QQE 06/40 tube.
:This is a dual tetrode commonly used in shortwave transmitters.
oes anyone has any experience? Tips? Schematics, perhaps?
:TIA!
:
:Best regards,
:
:Frits van Mourik
:Geluidsstudio Het Pand,
:Vlaardingen Netherlands
:www.studiohetpand.nl
:
:
:

I don't know the QQE 06/40, but you can use two 829Bs, with the two
halves paralleled to make a nice 35W P-P amp (use approx 4K as the A-A
load impedance). I would imagine you could do that with the QQE 06/40
as well.
--
Chris Morriss