Tubes?

[Super God]

And to think, all we had to do was WHAT HE TOLD US TO DO IN THE FIRST PLACE.  Ha!

Unfortunately I do not yet understand Marco's setup.  I don't understand what Steven meant by connected transformers in 'reverse'...

[turbo]

hi God  ,
Darren has modified the diagram i hope he posts it soon then you can see it.
it is the same as he posted a few pages back only with two added diodes in between the 500V 500V and the two plates.
Transformers in reverse just means one sine is gowing up while the other is going down.
like when you looze the Bass tones when you connect two speakers in reverse...

Marco.

[z_p_e]

Here is the circuit as per SM's description, and Marco's latest test.

To slightly alter the phase of one input, simply insert a capacitor (of sufficient voltage rating and capacity) in series with the Filament TX primary. To make the phases "in reverse of one another", simply reverse the primary leads of the Filament TX, and this will make them 180? out. The capacitor is not required for this second 180? test.

Don't worry that my 5U4GB symbol does not look like a tube diode. I was lazy when I built the part, but clearly labeled the Plate and Cathode on it. The dotted line extending around it indicates the complete package including the Filament itself and its associated resistance.

Don't get hung up on the transformer voltages I indicate for the B+ supply; substitute whatever transformer is necessary to achieve the +500V. As shown, the B+ supply is about +300V.

I would also suggest some more rugged silicone diodes in place of the 1N4007's I have shown (if possible). I just used them for convenience with my simulation. In reality though, the 1N4007 should work fine. Put a few 1N4007's in series on each side if you wish; that's what is done sometimes in the "real world".

Regards,
Darren

[turbo]

Darren, that is exactly how it was connected over here.
i did not use resistors but i do not think it will destroy the effect.

Thanks,
Marco.

[z_p_e]

Darren, that is exactly how it was connected over here.
i did not use resistors but i do not think it will destroy the effect.

Thanks,
Marco.

Hi Marco.

There are no "added" resistors in the circuit shown, other than the RL1. The resistors shown are only there to account for the DC resistance of all the transformer windings, and the heater filament resistance.

Darren