Hi, I've looked at building one of these and it's not quite so trivial to duplicate. The speed of the logic is important, the original design used ECL. High speed CMOS may be OK but how do you verify performance? The original also used an unusual input circuit designed around a discontinued line receiver IC. This is critical to performance, any variation in threshold will appear as a phase error. I'm continuing to prototype a new design and will let you know how I get on. I've got a manual on PDF if you need it.
Robert G8RPI. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rick Karlquist Sent: 06 December 2005 19:35 To: Discussion of precise time and frequency measurement Cc: [email protected] Subject: Re: [time-nuts] Looking for an HP K34-59991A Linear Phase Comparator It is trivial to build your own out of a couple of flip flops. You can read Michael Fischer's patent on it (circa 1980). Rick Karlquist N6RK NE8S wrote: > Gentlemen: > > Happy Holidays to All Time, Frequency, and Phase Domainers. > > I am looking for an HP Linear Phase Comparator, Model K34-59991A. Does > anyone have one to sell??? > > Thanks in advance for checking and passing the word for me. > > Gar Ko > NE8S > > Email Addresses: > > [EMAIL PROTECTED] > [EMAIL PROTECTED] > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Any opinions expressed in this email are those of the individual and not necessarily Genetix Ltd (Genetix) or any company associated with it. This email and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering to the intended recipient, be advised that you have received this email in error and that any use is strictly prohibited. If you have received this email in error please notify Genetix by telephone on +44 (0)1425 624600. The unauthorised use, disclosure, copying or alteration of this message is strictly forbidden. This mail and any attachments have been scanned for viruses prior to leaving the Genetix network. Genetix will not be liable for direct, special, indirect or consequential damages as a result of any virus being passed on, or arising from alteration of the contents of this message by a third party.
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