A.K.A a Goniometer Lester B Veenstra MØYCM K1YCM les...@veenstras.com m0...@veenstras.com k1...@veenstras.com US Postal Address: PSC 45 Box 781 APO AE 09468 USA UK Postal Address: Dawn Cottage Norwood, Harrogate HG3 1SD, UK Telephones: Office: +44-(0)1423-846-385 Home: +44-(0)1943-880-963 Guam Cell: +1-671-788-5654 UK Cell: +44-(0)7716-298-224 US Cell: +1-240-425-7335 Jamaica: +1-876-352-7504 This e-mail and any documents attached hereto contain confidential or privileged information. The information is intended to be for use only by the individual or entity to whom they are addressed. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this e-mail or any documents attached hereto is prohibited. -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Max Robinson Sent: Wednesday, December 24, 2008 6:23 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] New topics (was Re: He is a Time-NutTroublemaker....)
>>2. Several measurement techniques require a given phase relationship >>(e.g., quadrature) between DUT and reference. For HF frequencies (ie, 5 >>or 10 MHz) is there a *practical* phase shifter design covering 180+ >>degrees that doesn't involve switching various lengths of coax in and >>out of the line? There was a Hewlett Packard generator called a two phase oscillator or maybe it was two phase function generator. I forget the model number and don't have any way to look it up. It featured two outputs and a dial calibrated from 0 to 359 that would adjust the phase of one output with respect to the other. Behind the panel was a little box which I didn't try to open but the manual revealed it to have 3 coils, two at right angles to each other and the third one on the shaft. It operated at 5 MHz. If memory serves correctly, they called it a variable phase transformer. Regards. Max. K 4 O D S. Email: m...@maxsmusicplace.com 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 tubes group send an email to, funwithtubes-subscr...@yahoogroups.com ----- Original Message ----- From: "Joe Gwinn" <joegw...@comcast.net> To: <time-nuts@febo.com> Sent: Wednesday, December 24, 2008 3:52 PM Subject: Re: [time-nuts] New topics (was Re: He is a Time-Nut Troublemaker....) > At 5:05 PM +0000 12/23/08, time-nuts-requ...@febo.com wrote: >>Date: Tue, 23 Dec 2008 11:40:51 -0500 >>From: John Ackermann N8UR <j...@febo.com> >>Subject: [time-nuts] New topics (was Re: He is a Time-Nut >> Troublemaker....) >>To: Discussion of precise time and frequency measurement >> <time-nuts@febo.com> >> >>Magnus Danielson wrote: >> >>> My intent is to get some stuff done in the lab during the vacation. >>> (Desperatly trying to get some more on-topic discussions going). >> >>Here are two questions that have been running around my head: >> >>[snip] >>2. Several measurement techniques require a given phase relationship >>(e.g., quadrature) between DUT and reference. For HF frequencies (ie, 5 >>or 10 MHz) is there a *practical* phase shifter design covering 180+ >>degrees that doesn't involve switching various lengths of coax in and >>out of the line? > > Why the aversion to coax delay lines? They are simple and reliable. > The reason will help people to tell what alternatives would be best. > > Joe > > _______________________________________________ > 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. > > _______________________________________________ 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. _______________________________________________ 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.
