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YT2095UK · 27th Sep 2009, 9:16 pm

it did take a lot, but the way I have it configured currently, it takes very little (the bulb doesn`t even show except a little in IR.
g1 is the control as normal, g2 is direct to cathode, g3 is direct to anode.
set up like This, I get a really good RF amplification (micro watts to milli watts) and that`s whilst it`s driving a speaker.

now I realise that this in itself it`s practical for anything in particular as it stands, or with these particular parts I`v chosen to use, but I think there May be something useful here for Future work/experiments.

incidentaly, I did try a coupling to the sig-gen and it`s ok up until about 3MHz and totally drops off at 3.5.
I`ll replace the indutive load (OP transformer) with a resistor in the morning and try again, maybe the load plays a part?

27th Sep 2009, 9:16 pm	#5
YT2095UK Retired Dormant Member Join Date: Sep 2009 Posts: 487	Re: Pentode amp experiment. it did take a lot, but the way I have it configured currently, it takes very little (the bulb doesn`t even show except a little in IR. g1 is the control as normal, g2 is direct to cathode, g3 is direct to anode. set up like This, I get a really good RF amplification (micro watts to milli watts) and that`s whilst it`s driving a speaker. now I realise that this in itself it`s practical for anything in particular as it stands, or with these particular parts I`v chosen to use, but I think there May be something useful here for Future work/experiments. incidentaly, I did try a coupling to the sig-gen and it`s ok up until about 3MHz and totally drops off at 3.5. I`ll replace the indutive load (OP transformer) with a resistor in the morning and try again, maybe the load plays a part?