[time-nuts] Need Gen Rad type 276 crystal

I recently powered up a General Radio model 275 piezo-electric oscillator, which according to General Radio information was introduced in 1924 as the first commercially available crystal oscillator. Right now I am using a type 376-L 1.000 MHz crystal in the oscillator. I am looking for a type

Re: [time-nuts] FW: Pendulums & Atomic Clocks & Gravity

In a message dated 5/30/2007 22:42:08 Pacific Daylight Time, [EMAIL PROTECTED] writes: > it cannot directly read-in RS-232 output from the 53132A > (such as I posted > yesterday). This is because of the Comma the HP unit inserts > in the numbers. >please send short file and I will look

Re: [time-nuts] Sensing pendulum position, speed, or height

>> Lunar/Solar Tides and Pendulum Clocks (part 1) >> http://www.leapsecond.com/hsn2006/ch1.htm > > Nice. Thanks. Did you ever write chapter 2? In progress. I'll let you know when it's done. >... > Or a digital camera: take a sequence of pictures and interpolate as to when > it crosse

Re: [time-nuts] Sensing pendulum position, speed, or height

Tom Van Baak wrote: > A Measurement of the Period Stability of a Free Pendulum > http://www.leapsecond.com/history/1996-DeMarchi-Pendulum-Stability.pdf > > Clever solution. His optical gap is something like 5 microns. > > /tvb > > An additional issue is the pointing instability of the laser used

Re: [time-nuts] OT: Not pendulums or atomic clocks or gravity - the answer

At 08:23 PM 5/30/2007, Palfreyman, Jim L wrote... >Now what about the reason why scales don't work on carpet... They just don't work _well_, which is why fish evolved into amphibians with legs and feet about 340 megayears ago (obligatory time-related content). ___

Re: [time-nuts] Sensing pendulum position, speed, or height

Tom Tom Van Baak wrote: >> I would also worry about long-term stability of any optical >> emitter and sensor pair. Any decline in light output over >> time might appear in the data as a phase shift which could >> affect amplitude or period stability. Then there's any tempco >> or voltco issues to c

Re: [time-nuts] OT: Not pendulums or atomic clocks or gravity - the answer

On Thu, 31 May 2007 21:14:26 -0400, [EMAIL PROTECTED] (Mike S) wrote: >At 08:23 PM 5/30/2007, Palfreyman, Jim L wrote... > >>Now what about the reason why scales don't work on carpet... > >They just don't work _well_, which is why fish evolved into amphibians >with legs and feet about 340 megayea

Re: [time-nuts] R: Info on HP 10514A and 10534A mixers?

The 10514/34 design is nothing remarkable. You could build a considerably better design with currently available technology. You would have difficulty copying the design due to the legacy parts used. Rick Karlquist N6RK > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROT

Re: [time-nuts] R: Info on HP 10514A and 10534A mixers?

I have an eight page manual dated 15 June 1969 for these mixers. It shows applications and specifications. I have no way to presently scan it. If somebody is willing to scan it into a PDF file and make it available, I will be happy to send it via snail mail. Brian - N4FMN Richard (Rick) Kar

Re: [time-nuts] R: Info on HP 10514A and 10534A mixers?

In a message dated 01/06/2007 03:28:44 GMT Daylight Time, [EMAIL PROTECTED] writes: I have an eight page manual dated 15 June 1969 for these mixers. It shows applications and specifications. I have no way to presently scan it. If somebody is willing to scan it into a PDF file and make it