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Hi Vern, I believe the 70E-8A PTO in the 310C has a 160m output. It is doubled in the 6AG7 (V101) tuned buffer. 73 Bob Mattson...W2AMI http://www.qrz.com/callsign/w2ami ----- Original Message ----- From: "Vernon Van Zandt" <[email protected]> To: "collins" <[email protected]>; "collins2" <[email protected]> Sent: Sunday, February 02, 2003 12:42 AM Subject: [Collins] VFO Schematics Greetings. Anyone here happen to have the schematics for a Collins 310C VFO/exciter, and wouldn't mind sharing them? Also, sometime ago there was a question posted regarding a mod that allows the VFO to be used for 160 meter operation. Something along the lines of adding a buffer amp circuit...? Can anyone can shed some light on this, or even details (schematic maybe?) on how it is connected, etc..? (Sorry about the cross-post, but my question would be verbatim on both anyway...) Many thanks, N7GTB Vern Sponsored by the Collins Radio Association http://www.collinsra.com