> From: Peter Chadwick <Peter.Chadwick@gpsemi.com>
> To: "'amps'" <amps@contesting.com>
> Subject: [AMPS] parasitics
To: <amps@contesting.com>
> Date: Fri, 22 Aug 97 10:30:42 +0000
> Rich suggests small resistors for MOSFET parasitic suppression. I agree
> - I've found that approach far more reliable in production, and cheaper.
> They also work well on small triodes in cathode followers and the like -
> E88CC/6DJ8's are very prone to parasitics, but 22 ohms in the plate
> lead works wonders.
Good example Peter.
Higher series resistance almost always decreases high frequency
response or gain.
When I design a VHF suppressor, I try for a series resistance that
dominates the anode load impedance. Lower series resistance will
at the frequency of instability will almost always decrease
stability.
73 Tom
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