Boards? Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y [email protected]
452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 GPS: 39.336826 N 78.982287 W (Google) GPS: 39.33682 N 78.9823741 W (GPSDO) Telephones: Home: +1-304-289-6057 US cell +1-304-790-9192 Jamaica cell: +1-876-456-8898 -----Original Message----- From: time-nuts [mailto:[email protected]] On Behalf Of xaos Sent: Thursday, September 10, 2020 7:44 PM To: [email protected] Subject: Re: [time-nuts] Some FTS1000 questions As usual, Dr. Griffiths has provided all we need. Back in 2007 I had a similar issue and he worked out this very nice circuit using easy to find 2N3904 BJTs. I simulated the circuit using PSPICE. Here are the details. https://www.darksmile.net/ee/frequency_doubler_BJT.html George On 9/10/2020 19:11, Bruce Griffiths wrote: > You could use either the NIST CG JFET doubler or its bipolar CB equivalent. > > Bruce >> On 11 September 2020 at 08:43 Tobias Pluess <[email protected]> wrote: >> >> >> Dear colleagues >> >> I recently got a FTS1000 oscillator. (Not FTS1000A or B, but just FTS1000, >> I assume it is the first version). It is a very nice unit, but I wanted to >> know a bit more about its construction and opened it. >> After I had replaced the foam which was already quite dissolved, I began >> reverse engineering the output amplifier. >> Has someone perhaps already done that? >> I was thinking about whether it would be possible to replace the output >> amplifier with one that has an integrated doubler (as my unit is a 5MHz >> version). >> >> BR >> Tobias >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
