Re: Another DIY project finished


"Tom Schlangen" <serpentine@xxxxxxxxxxxxx> a écrit dans le message de news:
p0di83-jam.ln1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hi Don,
>
>> Just out of interest, how did you wire the 6V6 as a pentode?
>> It is a beam tetrode.
>
> I have forgotten to include the tetrode-pentode conversion in
> the walkthru, indeed!
>
> On the other hand, probably everyone interested in tube tech has
> done that already I suppose, since actually this is quite simple
> to do. If you have not yet, here is a short how-to for you:
>
> Take a glas envelope 6V6, a hammer and smash the glas envelope
> gently (you could use a metal envelope 6V6, but smashing glas
> is so much more fun). Take care capturing the vacuum, since we
> will need it later. Remove the plate structure and the beam
> forming plates. Solder some windings of fine wire to the posts
> that did hold the beam forming plates to make the supressor grid.
> Use one of the formerly not connected pins in the base to make a
> connection to the new supressor grid. Take a suitable glas tube
> (neck of a clear wine bottle comes to mind) and a torch. Use the
> torch to carefully melt and join the bottle neck to the base,
> while putting the vacuum back in again (no problem to re-use the
> previously used vacuum here - do not trust audiophools that try
> to sell you special new old stock vacuum from TFK or Mullard
> plants - those most likely are fakes to rip your money). Last
> but not least, at the socket, wire the new supressor grid pin
> to the cathode pin.
>
> Wasn't that hard, wasn't it?

;>))) So true

>
> Tom
>
> --
> The opposite of a correct statement is a false statement. But the
> opposite of a profound truth may well be another profound truth.
> - Niels Bohr


.

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