GAREY - K4OAH <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Maurizio -
As long as the TR has the Pin 2-8 internal jumper removed it should work fine. The specifications for the tube PTO's are the same as the later SS ones, i.e., "Drift less than 100 Hz after warm-up and less than 100 Hz for +/- 10% line voltage change." That said, each version of the PTO, from tube, to bipolar, to FET, each was a little more stable than the previous version. The only real difference is how long the "warm-up" period has to be to achieve stability. The tube versions liked about 20-30 minutes, and would move slightly during transmissions, unless the transceiver had supplemental cooling. The bipolars would settle in about 10 minutes and displayed slightly less shift during transmissions. The FETs also took 5-10 minutes and wouldn't shift noticeably unless the transmission was 10 minutes or more. 73, Garey - K4OAH Atlanta Drake C-Line Service Manual <http://hr99.home.mindspring.com/R-4C_Servicez/> Bollini, Maurizio wrote: > "Bollini, Maurizio" <[EMAIL PROTECTED]> made an utterance to the drakelist > gang > ---------------------------------------------------------------------- > Hi Drake friends, > > I have an RV-3. After restoration I'd like to test this unit with one of > my TR-4 / TR-4C. > (1) Can I plug and play this unit or does it require modification? > > Another question for my curiosity. > > (2) Does someone has experience on frequency drifting of the TR-3 > ("tube" PTO) compared to a TR-4 ("solid state" PTO)? > (I mean: does the TR-3 drift more than a TR-4 ?) > > 73 Maurizio ---------------------------------------------------------------------- On Behalf of GAREY - K4OAH <[EMAIL PROTECTED]> Submissions: [email protected] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ----------------------------------------------------------------------
