[time-nuts] RS SMIQ
Good morning, who has asked me for the service manual ? 73 de Ulrich ___ 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.
Re: [time-nuts] Wenzel 100 MHz Oscillators (w/ EFC) available
John Skip, as I am getting 5 such oscillators, I will open 2 or three (after measurements of the PN ) and apply some magic... To build something like this mechanically will be tough. The technology and circuit design will have changed a lot in 10 + years, so I will try. Opening the units may be the tough part. 73 de Ulrich x I have a few of the 500-6769 parts here, and measured a couple of them awhile back: http://www.ke5fx.com/Wenzel_500_06769_PN.png Not a bad price at all. If a $2000 OCXO can achieve -140 dBc/Hz at 100 Hz and a $50 OCXO will do -117, that's almost 10 dB better than the expected 20*log10($2000 / $50) ratio. :) -- john, KE5FX Miles Design LLC In a message dated 12/5/2014 2:26:24 P.M. Eastern Standard Time, ka2...@aol.com writes: I can measure all things, if you need help, tell me ! Ulrich In a message dated 12/5/2014 2:13:34 P.M. Eastern Standard Time, skip.with...@gmail.com writes: Hello Ulrich, The units have been paid for and are being sent Priority Mail. Pleasure doing business with you. If you have any feedback on what the phase noise does look like I would certainly be interested in the data. Regards, Skip Withrow On Fri, Dec 5, 2014 at 11:06 AM, _KA2WEU@aol.com_ (mailto:ka2...@aol.com) wrote: Skip, can I have 5 , mail to me , how would you like to get paid ? Can I give you our FedEx number . Thanks, Ulrich xxx Ulrich L. Rohde, Ph.D. Chairman Synergy Microwave Corporation 201 McLean Boulevard Paterson, NJ 07504 Phone: _973-881-8800_ (tel:973-881-8800) Fax: _973-881-1924_ (tel:973-881-1924) In a message dated 12/5/2014 1:00:56 P.M. Eastern Standard Time, _skip.withrow@gmail.com_ (mailto:skip.with...@gmail.com) writes: Hello time-nuts, Please excuse the blatantly commercial announcement, I generally keep business matters off the list, but I have some Wenzel oscillators that may be of interest to time-nuts and wanted to give you first crack at them. These are Wenzel 500-06769 units, custom number for Harris used in microwave radios. Output is 100MHz at +20dBm. Supply input is +12 volts DC (about 500mA at start). EFC runs between 0.5V and 4.5V with positive coefficient and is about 335Hz/V. Unit is in standard 2 x 2 x .75 package. Output connector is female SMA. These would make great units for synthesizer and DDS projects. I don't have the ability to measure the phase noise, but should be relatively good as they were used at microwave frequencies in their past life. I'm asking $50 each for them and $7 (any quantity) Priority Mail shipping to U.S. addresses only. If you would like one (or more) please PayPal to _paypal@rdrelectronics.com_ (mailto:pay...@rdrelectronics.com) . I have attached a picture of one unit with the pinout. Regards, Skip Withrow RDR Electronics, Inc. _303-790-1830_ (tel:303-790-1830) 8am-5pm M-F ___ time-nuts mailing list -- _time-nuts@febo.com_ (mailto: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.
Re: [time-nuts] Lucent KS-24361 10 Mhz out success.
Any more details on this ? Ulrich In a message dated 12/4/2014 7:36:22 A.M. Eastern Standard Time, kb...@n1k.org writes: Hi On Dec 3, 2014, at 9:34 PM, Alex Pummer a...@pcscons.com wrote: The OCXO in the TBolt beats the Morion parts by a wide margin. In the context of the message that was a reply to; Phase noise Bob Bob in what way dies it? phase noise ? harmonics? standalone frequency stability? 73 Alex ___ 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.
Re: [time-nuts] 10 MHz oscillators vs 100 MHZ
For the low noise nuts, here are some modern techniques . At the moment I am looking at 1/f noise , or better how to keep it low. I am supervision an dissertation on this topic and I am happy to get some input. 73 de Ulrich U. L. Rohde and A. K. Poddar, “Method Minimizes Noise in VCXOs”, Microwave RF, Nov 2011. U. L. Rohde and A. K. Poddar, “Techniques Minimize the Phase Noise in Crystal Oscillators”, 2012 IEEE FCS, pp. 01-07, May 2012 U. L. Rohde and A. K. Poddar, “'Electromagnetic Interference and Start-up Dynamics in High Frequency Crystal Oscillator Circuits,”, 2010 IEEE International Frequency Control Symposium, June 01-04, 2010, California, USA. U. L. Rohde and A. K. Poddar, “Impact of Radiated EMI in High Frequency Crystal Oscillator”, IEEE MTT-S Digest, May 2010. In a message dated 12/3/2014 4:38:04 P.M. Eastern Standard Time, paulsw...@gmail.com writes: What a pleasant surprise to see Ulrich post on Time-nuts. We spoke many years ago on radio on as I recall an opening on 2 meters FM. I have to agree with Azelio for many of us it is the other way around. We would learn as we do from many of the other excellent Time-nuts mentors. Best regards Ulrich Paul WB8TSL ___ 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.
Re: [time-nuts] 10 MHz oscillators vs 100 MHZ
Hi from NJ, I am more involved in 100 Mhz to 128 MHz crystal oscillators and their measurements, 10 MHz design is new for me. I have analyzed and measured the famous HP 10 MHz SC based oscillator, disassembled it, admired and measured the crystal. Does anyone still makes such a large and good device. Congratulations to the inventor of this oscillator !! Looking at 100 MHz oscillators, they have 18 to 20 dBm output and are advertised at -145 dBc/Hz at 100 Hz offset and - 187 dBc/Hz at 1 MHz, the 10 MHz oscillator just gets -165 dBc/Hz far off with NEL looking as the best. Who can get me up to speed ? Thanks, Ulrich , N1UL ___ 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.
Re: [time-nuts] 10 MHz oscillators vs 100 MHZ
Hi John, thanks, I am more interested in the inner workings of the 10 MHz oscillators, and why they are about 10 db shy in phase noise. And yes I have build 100 MHz oscillators with -145 . Thanks , Ulrich In a message dated 12/2/2014 6:29:10 P.M. Eastern Standard Time, j...@miles.io writes: NEL has great OCXOs. Also worth checking out Wenzel (they own Croven Crystals and will sell them separately), Rakon, and Vectron. I haven't seen any 100 MHz OCXOs rated for -145 at 100 Hz, but -135 can be had. -- john, KE5FX Miles Design LLC -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Ulrich Rhode via time-nuts Sent: Tuesday, December 02, 2014 10:27 AM To: time-nuts@febo.com Subject: Re: [time-nuts] 10 MHz oscillators vs 100 MHZ Hi from NJ, I am more involved in 100 Mhz to 128 MHz crystal oscillators and their measurements, 10 MHz design is new for me. I have analyzed and measured the famous HP 10 MHz SC based oscillator, disassembled it, admired and measured the crystal. Does anyone still makes such a large and good device. Congratulations to the inventor of this oscillator !! Looking at 100 MHz oscillators, they have 18 to 20 dBm output and are advertised at -145 dBc/Hz at 100 Hz offset and - 187 dBc/Hz at 1 MHz, the 10 MHz oscillator just gets -165 dBc/Hz far off with NEL looking as the best. Who can get me up to speed ? Thanks, Ulrich , N1UL ___ 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.
