Tubes Asylum

RE: Very useful info.

207.96.96.210

This Post Has Been Edited by the Author

In Reply to: RE: Very useful info. posted by andy evans on August 26, 2020 at 15:28:29

Glad you have these chokes to experiment with. Just to elaborate a bit regarding my comment on the quality of the choke, it has more to do with the shunt capacitance / leakage inductance characteristics rather than a high-ish inductance value. Same criteria that govern good IT performance apply here as well.
For this reason I suspect that the 157G will not be a good match as it's designed to be a PSU filter choke where wide bandwidth is a detriment and not an asset.
If you're going to entertain noval tubes like the EL84 you also might want to look into the 6197 / 6CL6 in triode. You can bias it with a 150 Ohm cathode resistor and it will be drawing 30mA with around 180V on the plate. At the specified OP it has a gain of over 20. The best part is that it has a plate impedance of 1.9KOhms
https://tubedata.altanatubes.com.br/sheets/127/6/6CL6.pdf (Open in New Window)

Edits: 08/26/20 08/26/20 08/26/20

Follow Ups: