Tubes?

[z_p_e]

For anyone who may have an input limit on their oscilloscope, I would suggest the following addon to the circuit to make it possible to take measurements and see what is going on at the output.

Ratt and RL1 provide a "divide-by-10" attenuator, so the most you should see on the output with the scope is about 50V peak. NOTE the resistor Wattage ratings!

Don't mess with this stuff guys unless you know what you are doing. 

Also NOTE, that the resistances shown on the diagram such as Rf, Rs and Rp are not "added" resistors, they are simply there for the simulation to account for transformer winding DC resistances and the Filament resistance. Do not add these to your circuit, they are transparent and already part of the real components.

Darren

[Mannix]

Darren,

i have just this up set up and as before no big kicks, yet either phase....yet
...tomorrow is another day. there are few very smallones...I will search those out

did your sim show anything?

[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.

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

Okay Darren, Thanks.

i do not know if it is case sensitive so i will note that in the experiment i stabilized the plate voltage up to 500Volts and from the other plate transformer i used the 6,3 Volt 3A winding for the heater.

Marco.

[innovation_station]

 

nice work all  im happy to see the tube intrest has growen

my cold bottle will soon turn hot im working on my new gk4 ring 4" model  i will try my tube on that ring first 

is

[z_p_e]

Darren,

i have just this up set up and as before no big kicks, yet either phase....yet
...tomorrow is another day. there are few very smallones...I will search those out

did your sim show anything?

Lindsay,

The simulation of the posted circuit did not show anything unusual....simply a full-wave rectified 60 Hz, riding on a slight modulation of 60 Hz from the 5V filament voltage. Introduction of the silicone diodes did not change anything significantly.

I also tried 100 Hz for the Plate transformer, and 20 Hz for the Filament, and still nothing unusual.

I tried changing the phase in all cases too, and still nothing.

It's interesting that your setup did not show anything similar to Marco's.

Let's hope he can redo the test with only the attenuator on the output so we can see if the "3rd component" is still there, and if so, how or why it is being created.

@Marco,

So you adjusted the "Plate" generator until you had 500V peak, then used the "Filament winding only" from a second transformer to supply your Filament?

Yes that should be OK. In theory I see no problem with that.

Darren