[Central-Electronics] FW: CE20A mods for QRO

[Jim Candela]

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-----Original Message-----
From: Jim Candela [mailto:JCandela@prodigy.net]
Sent: Thursday, December 26, 2002 9:43 AM
To: Larry Szendrei
Subject: RE: CE20A mods for QRO



Larry

	I forgot to mention about that 10K resistor across the 6BA7 plate circuit.
Removing it raised the "Q" considerably. On 80 meters, if you QSY 20Khz, the
circuit must be re-peaked. No instability has been noticed becaus of this. I
might try to replace the 10k WITH A 22k, OR 27k to find a compromise between
"Q" and conversion gain. The cathode follower (1/2 12BH7) seems to do a good
job isolating the converter from the final stage. In fact, because of it,
you might have good sucess driving higher Cgp tubes in the final like the
EL-34 without instability.

73