Radio on the Fet input
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txbluesboy
- Posts: 387
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- Location: Dallas area
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Radio on the Fet input
Do I just need to put a resistor on the FET input ? Also,This application (SSS) has a FET gain pot on the front panel, do I just replace the output trim pot on the board with 10K pot on the front panel?
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markr14850
- Posts: 204
- Joined: Mon Jun 18, 2007 6:16 pm
Re: Radio on the Fet input
What FET circuit are you using?
The circuit I usually see here has 1M in parallel with 100pF to the gate of the FET. That 100pF always looked like a path for RF to me.
I prefer to run a lower R there (10K), no parallel cap, and instead run a small (150pF, styrene) cap from the gate to ground to simulate more Miller effect.
--Mark
The circuit I usually see here has 1M in parallel with 100pF to the gate of the FET. That 100pF always looked like a path for RF to me.
I prefer to run a lower R there (10K), no parallel cap, and instead run a small (150pF, styrene) cap from the gate to ground to simulate more Miller effect.
--Mark
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txbluesboy
- Posts: 387
- Joined: Mon Apr 02, 2007 3:52 pm
- Location: Dallas area
- Contact:
Re: Radio on the Fet input
I do have the one meg resistor in parallel with 100pf. I'll try it your way.
Thanks Terry
Thanks Terry