Hello All. Now I have some 5MHz DOCXO. I have started to experiment with them and I would like to build a frequency doubler. I already saw the very nice circuit from Gerhard Hoffmann for the Lucent, I saw some diode circuits from Wenzel (my oscillators output around 1.5Vpp loaded, too scarce for diodes alone; I used a 1:2 transformer just to try and I obtained the 10MHz but not good for anything) and I saw the doubler circuit Racal Dana used in some counters I attached.
I would like to build something like one of those; it's a full wave rectifier made by a differential amplifier and two diodes, followed by a 10MHz amp/filter chain much like the IF of FM radios (with AGC too!). I don't know if it's adequate for serious use; I also saw the Z3811-80007 doubler board used in Z3815A and Z3805A according to the seller, much more modern and surely better, but I have not its schematic. Someone knows it? I have bought one of the Racal units, just to have the opportunity to fiddle with an already working one; I identified the IF transformers used there and are Toko common 10.7MHz Q=80 unit. They are not built anymore but it's possible to find similar ones in Internet; however it happens to me frequently to need information about the old Toko 10K series and there is not any comprehensive source. I saw I share this frustration with many people in the electronics newsgroups. Finally I found that a (fairly) complete Toko catalog existed, it was sold by Cirkit in '94 and it's not available anymore. Someone has it in PDF form, or want to borrow it to me to scan it? By the way, I see that really many of the 10MHz reference out there, are in effect doubled 5MHz ones so build a doubler seems reasonable for me. Best regards, Andrea Baldoni _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
