Re: The Potato Amp?

In article <1141000733.831867.177510@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, "Andre
Jute" <fiultra@xxxxxxxxx> wrote:

John Byrns wrote:
In article <1140933911.866627.93680@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, "Andre
Jute" <fiultra@xxxxxxxxx> wrote:

Tell us more of your parameters. Where would the signal come from, can
your IST be a step up as well as splitter, how much power do you want?

While the 417A doesn't particularly stir my audio passions, I am starting
with your SE 417A "potato" amplifier as the baseline. From my perspective
the specifications of an ideal push pull "potato" amplifier would be a
maximum output of 2 Watts, which could be driven to a 1 Watt output with
the 2 volt peak signal from a CD player that you quote.

The input transformer can have a voltage step up, the transformer I have
in mind has a voltage step up from the primary of 3X grid to grid.

I have in mind some sort of dual triode tube with an anode resistance some
where in the neighborhood of 1,700 Ohms, a transconductance as high as
possible, and an anode dissipation rating sufficient to provide a 2 Watt
output.

Any thoughts?

I can't think of anything like you want.

What comes to my mind instead is the 6SN7GTB which will give you near
enough one watt of very clean power in PP.

Hi Andre,

The 6SN7GTB has too high a plate resistance and the transconductance is
too low for the "potato" amplifier design I am thinking of.

Actually the 7044 tube that you mentioned in another thread comes pretty
close to what I am looking for, its main shortcoming being an inadequate
anode dissipation rating.


Regards,

John Byrns


Surf my web pages at, http://users.rcn.com/jbyrns/
.

Relevant Pages

  • Re: Seek advice - Upgrading pc.
    ... and 12 volts) to allow more power to get to the motherboard, ... I'd prefer to power the VRM off the 5 volt ... The box now takes just under 40 watt (drives spun down) ...
    (uk.comp.homebuilt)
  • Re: New Oscillator
    ... for a while the power dropped a bit. ... When I turned it on at 40 volt the current was 1 amp and the power dropped ... from an initial 10 watt down to 8.5 watt. ... The presense of the tube does not alter the power or the current. ...
    (sci.physics.fusion)
  • Re: New Oscillator
    ... It has been running at 40 volt for an hour now, the power is 7 watt the ... I need more power. ... The presense of the tube does not alter the power or the current. ...
    (sci.physics.fusion)
  • Re: New Oscillator
    ... I have changed the capacitor and completed the power supply. ... I found I could only get 16 watt out of the oscillator with the 50 volt ...
    (sci.physics.fusion)
  • Re: New Oscillator
    ... lower power. ... My oscillator is only 9 watt but this PSU should bring it up to ... The potential across the tube will rise to 2500 volts RF. ... The transistors get warm but warmer with the tube in place. ...
    (sci.physics.fusion)