Re: [time-nuts] TADD-1 Design (was Re: Stepping up the output of an OCXO

Chris Christopher Hoover wrote: >> The TI regulators are, from my perspective extremely noisy, one can do >> much better at least for higher output voltages. >> They also don't have a high enough output for the TADD-1. >> > > Agreed, that that regulator doesn't have sufficient margin for the

Re: [time-nuts] TADD-1 Design (was Re: Stepping up the output of an OCXO

> The TI regulators are, from my perspective extremely noisy, one can do > much better at least for higher output voltages. > They also don't have a high enough output for the TADD-1. Agreed, that that regulator doesn't have sufficient margin for the entire TADD-1. I was suggesting using the low

Re: [time-nuts] time-nuts Digest, Vol 31, Issue 14

Hi, Thanks for the responce. you are right, some where else i also found 7uS accuracy requirements as well, but these values seem to be a bit older. coz with HSDPA coming up, with bitrate upto 10.8Mbps, bit duration comes out to be 92.6 ns. this might need better synchronization accuracy than 10

Re: [time-nuts] HP 10811A Schematic

Thank you, 73, Dick, W1KSZ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Dr Bruce Griffiths Sent: Sunday, February 04, 2007 5:13 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 10811A Schematic Richard W. Solomon

Re: [time-nuts] HP 10811A Schematic

Thank you. 73, Dick, W1KSZ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Bill Jones, K8CU Sent: Sunday, February 04, 2007 5:09 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 10811A Schematic I posted the oscillat

Re: [time-nuts] HP 10811A Schematic

Richard W. Solomon wrote: > I got a junker HP 5328A Counter and salvaged the Time Base and the > circuit board it is on. Does anyone have the schematic for it > > > Thanks, > > 73, Dick, W1KSZ > > ___ > time-nuts mailing list > time-nuts@febo.com > https

Re: [time-nuts] TADD-1 Design (was Re: Stepping up the output of an OCXO (Dr Bruce Griffiths))

Christopher Hoover wrote: >> The power supply noise may also limit the performance. >> > > This is my major concern with the design. > > Any noise on the supply rail goes into the first stage via the bias network, > and is transferred at whatever gain to the output. > > I noticed that when I

Re: [time-nuts] HP 10811A Schematic

I posted the oscillator and interface schematic here: http://www.realhamradio.com/5328a-oscillator.pdf Bill, K8CU > I got a junker HP 5328A Counter and salvaged the Time Base and the > circuit board it is on. Does anyone have the schematic for it > > > Thanks, > > 73, Dick, W1KSZ > __

[time-nuts] HP 10811A Schematic

I got a junker HP 5328A Counter and salvaged the Time Base and the circuit board it is on. Does anyone have the schematic for it > Thanks, 73, Dick, W1KSZ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time

Re: [time-nuts] TADD-1 Design (was Re: Stepping up the output of an OCXO (Dr Bruce Griffiths))

> The power supply noise may also limit the performance. This is my major concern with the design. Any noise on the supply rail goes into the first stage via the bias network, and is transferred at whatever gain to the output. I noticed that when I used a particular bad wall wart to run one of

[time-nuts] FMT

I received my letter yesterday and the ARRL stayed with the same numbers I posted last month. Based on mine, and other reports I beleve their 40 meter reading is probably low by around 1Hz. I read the W1AW 40 meter frequency 1.13 Hz higher. My copy on W1AW was strong and stable at the time. I read

Re: [time-nuts] Stepping up the output of an OCXO

From: Dr Bruce Griffiths <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Stepping up the output of an OCXO Date: Mon, 05 Feb 2007 01:22:54 +1300 Message-ID: <[EMAIL PROTECTED]> > Ulrich Bangert wrote: > > Bruce, > > > > I have seen this specs before but do you know how to find the > > schematics? > >

Re: [time-nuts] Stepping up the output of an OCXO

Dr Bruce Griffiths said the following on 02/04/2007 02:32 AM: > My calculations using the component values in the circuit indicate that > the TADD-1 noise figure should be about 19dB and its corresponding phase > noise floor should be lower than -160dBc/Hz. when the input signal is > +7dBm or g

Re: [time-nuts] Stepping up the output of an OCXO

Ulrich Bangert wrote: Bruce, I have seen this specs before but do you know how to find the schematics? Best regards Ulric Bangert Ulrich Since the earlier NBS isolation/distribution amplifiers consisted of dc coupled cascaded common base stages (according to Magnus who had looked at som

Re: [time-nuts] Stepping up the output of an OCXO

Ulrich Bangert wrote: > Bruce, > > I have seen this specs before but do you know how to find the > schematics? > > Best regards > Ulric Bangert > > Ulrich NO, I'm still looking, I presume you mean the NIST amplifier schematics and not the TADD-1 schematics at: http://www.tapr.org/~n8ur/

Re: [time-nuts] Stepping up the output of an OCXO

Bruce, I have seen this specs before but do you know how to find the schematics? Best regards Ulric Bangert > -Ursprüngliche Nachricht- > Von: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Im Auftrag von Dr Bruce Griffiths > Gesendet: Sonntag, 4. Februar 2007 08:32 > An: Discussion of p