Hi If you are going to tear into the unit, lift the 100K (R2) that goes to the 6.4 V reference and bring that out. Ground the existing EFC lead and feed the new one with a (low) positive voltage.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Friday, October 29, 2010 5:00 AM To: [email protected] Subject: [time-nuts] HP 10811 EFC I have in the past reversed the varactor, grounding R2 to get a positive tuning voltage from 1.5 to 12 Volt. Also brought out the 5.7 volt for reference purposes. That way every thing was positive. Is easy to get to. But now I have some very good units and I am worried I may change something and degrade performance. Any comments? Bert Kehren _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
