OK. I'd forgotten about the integrator. I've not looked at mine since about 1986 when I switched to LORAN. The 117A been switched off since. I've just been going for memory.
Enjoy, -John ================ > 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.
