Uses 1 6cw4 at the integration amp and 3 X 7587s for the RF amps. All 4 tubes filaments are series from the +35v which seems a bit high per tube. Buts thats the way its designed
On Sun, May 2, 2010 at 5:52 PM, J. Forster <[email protected]> wrote: > Hi Max, > > Take the top cover off. There is a shield box that may have useful info > stenciled on top (2 - 4 screws) I have a HC manual, but cannot access it > and won't be able to for some time. > > Best, > > -John > > ================= > > > > > > Well, I didn't get a manual with my receiver and I've never had it apart. > > I > > was just assuming that it used standard newvistors. Assuming is always a > > dangerous thing to do. > > > > Regards. > > > > Max. K 4 O D S. > > > > Email: [email protected] > > > > Transistor site http://www.funwithtransistors.net > > Vacuum tube site: http://www.funwithtubes.net > > Music site: http://www.maxsmusicplace.com > > > > To subscribe to the fun with transistors group send an email to. > > [email protected] > > > > To subscribe to the fun with tubes group send an email to, > > [email protected] > > > > ----- Original Message ----- > > From: "J. Forster" <[email protected]> > > To: "Discussion of precise time and frequency measurement" > > <[email protected]> > > Sent: Sunday, May 02, 2010 2:52 PM > > Subject: Re: [time-nuts] schematics for a HP117a please > > > > > >> Hi Max, > >> > >> Are you sure the main unit uses 6CW4s? It's been 20+ years since I last > >> had my unit apart, but I thought the 60 KHz amp in the main chassis used > >> Nuvistors with either grid or plate caps, something I'd never seen > >> before. > >> I also remember the Nuvistors were numbered something like 7xxx. > >> > >> I don't have the manual to hand at the moment to check. Sorry. > >> > >> FWIW, > >> > >> -John > >> > >> ================== > >> > >> > >> > >>> http://www.tubesandmore.com/ > >>> > >>> Has the 13CW4s for the loop antenna and 6CW4/6DS4s for the receiver. > >>> > >>> Regards. > >>> > >>> Max. K 4 O D S. > >>> > >>> Email: [email protected] > >>> > >>> Transistor site http://www.funwithtransistors.net > >>> Vacuum tube site: http://www.funwithtubes.net > >>> Music site: http://www.maxsmusicplace.com > >> > >> > >> > >> _______________________________________________ > >> 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. > _______________________________________________ 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.
