Re: [time-nuts] TAPR TICC boxed (input protection)

David wrote: I know one thing to watch out for if you are looking for low leakage is gold doping Anything that increases carrier mobility increases leakage current (all else equal -- i.e., for each particular device geometry). This accounts for the much higher leakage of Schottky and

Re: [time-nuts] UltrAtomic Clock

The successful rate of the cme8000 chip thats being used was something like 80-90% 24 X 7 from when I was logging it on the east coast. I was amazed as I have dealt with wwvb over many years. Its a shame that there is no access to some of the tidbits within the chip for tinkering. But then it does

Re: [time-nuts] The ultraAtomic clock for home

Hi I’m sure it would have happily corrected for summer time in Europe two weeks later …. Provided (of course) it got the switch codes from DCF77 to tell it when to do so. My guess is that the tiny little watch antenna isn’t very good picking up time code from the other side of the Atlantic :)

Re: [time-nuts] CSAC vs NAC1

On 4/6/17 5:11 PM, paul swed wrote: Jim am I reading the casc power consumption correctly? .12 and .14 W. Thats 10X lower. Yes.. Any idea on the $$ CSAC in the several kilobuck range, NAC in the 10-20k range, I think. They're about the same size.. NAC is slightly smaller, I think.

Re: [time-nuts] Looking for Gen Rad 1101A oscillator/parts

John Was the mercury device anything like one of these? This is an old UK origin dual xtal oven ex open wire carrier equipment. Still has one original glass xtal but one has been replaced with a more 'modern' holder style. http://homepages.ihug.co.nz/~tractorb/old%20xtal%20oven/ DaveB, NZ

Re: [time-nuts] Looking for Gen Rad 1101A oscillator/parts

Yes, I have the 1190 crystal and the socket. That is one of the driving factors for me to get the oscillator functional again. I am hoping someone has parts of another 1101A that is missing the crystal bar. John Bob kb8tq wrote: > Hi > > I have seen only one of them

Re: [time-nuts] CSAC vs NAC1

Hi Yes the numbers are correct, the NAC pulls roughly 10X the power of a CSAC. Bob > On Apr 6, 2017, at 8:11 PM, paul swed wrote: > > Jim am I reading the casc power consumption correctly? .12 and .14 W. > Thats 10X lower. > Any idea on the $$ > Regards > Paul > WB8TSL >

Re: [time-nuts] HP5061B High Ion Current/Tubes Out of Cesium

Donald running higher temperatures on a a normal tube may indeed give you a bit more life. Thats exactly how Frankenstein works. Its a hand me down tube that normally showed as dead. Believe me it doesn't even move the current meter and its working. My firm belief is that option 004 tubes do not

Re: [time-nuts] Looking for Gen Rad 1101A oscillator/parts

Hi I have seen only one of them that still had the 100 KHz bar in it in good shape. That was back in 1973 and I have no idea at all what happened to that one. It was at a surplus outfit in Indiana that is long since gone out of business. Bob > On Apr 6, 2017, at 6:04 PM, Pete Lancashire

Re: [time-nuts] The ultraAtomic clock for home

Bob, if you had your watch set to European time, could the fact that Europe changes to daylight time about two weeks after we do in North America have anything to do with it? ... Martin VE3OAT Bob (KB8TW) wrote : On a side note, my Citizen WWVB watch missed the change to DST this year. I

Re: [time-nuts] CSAC vs NAC1

Jim am I reading the casc power consumption correctly? .12 and .14 W. Thats 10X lower. Any idea on the $$ Regards Paul WB8TSL On Thu, Apr 6, 2017 at 6:11 PM, jimlux wrote: > Here's a quick summary of the datasheet performance between the > Vectron/Accubeat NAC1 and the

[time-nuts] UltrAtomic Clock

When I got home after my Thursday Lunch meeting today, my new La Crosse 404-1235UA-SS UltrAtomic clock was waiting. I unpacked it and installed two (of 4 possible) C-cells and set it on the floor upstairs near the center of my home, fully under the radiant barrier insulation that has foiled

[time-nuts] CSAC vs NAC1

Here's a quick summary of the datasheet performance between the Vectron/Accubeat NAC1 and the MicroSemi CSAC. Bear in mind that Microsemi now has a wider temp range (i'm using the old rev J datasheet) CSAC is 1/10th the power NAC1 has a better crystal, so the phase noise is better the

Re: [time-nuts] TAPR Oncore M12+ kit

... an hour later... of course, the power was reversed!!! positive now pin 8 on the DB9 going to the mobo. perhaps i should go back to writing software! suitably humiliated. 73 dave - k5en On Thu, Apr 6, 2017 at 1:55 PM, Dave Mallery wrote: > hi > > after carefully

Re: [time-nuts] Looking for Gen Rad 1101A oscillator/parts

I took a gamble at a swap meet a few years ago $5 but did not have time etc to look inside get home no rock but nice wooden box :-) On Thu, Apr 6, 2017 at 2:21 PM, Bob kb8tq wrote: > Hi > > Does your unit have the 1190 100 Kc quartz bar still in it? If so does the > mount appear

[time-nuts] HP5061B High Ion Current/Tubes Out of Cesium

https://www.febo.com/pipermail/time-nuts/2017-April/thread.html I spoke to Corby on the phone a few days ago about our first HP5061B that locks fine but has ion current on the order of 76 μA. It has not gone down significantly in two months of pump operation. He mentioned that the electrodes in

Re: [time-nuts] Looking for Gen Rad 1101A oscillator/parts

Hi Does your unit have the 1190 100 Kc quartz bar still in it? If so does the mount appear to be intact? At this late date, replacing that resonator is not going to be easy. Bob > On Apr 6, 2017, at 3:58 PM, jmfra...@cox.net wrote: > > I am trying to restore a clunker General Radio 1101A

Re: [time-nuts] TAPR Oncore M12+ kit

hi after carefully crafting the suggested db9mf cable (with 16vdc on 7 & 8+) i powered up, but no green led... the db9 to chassis seems ok. but am still engaged. there is no voltage across the backup battery (the holder seems slightly bent). the lack of a schematic for the mobo is a big

[time-nuts] Looking for Gen Rad 1101A oscillator/parts

I am trying to restore a clunker General Radio 1101A crystal oscillator. The unit I have is missing several parts including the mercury thermostat switch and parts of the oven box, and maybe more. I am looking to buying one or more other clunkers to get at least one of these historic devices

Re: [time-nuts] Cesium oven guts PIX

Corby thank you. Nice high resolution pictures. Unfortunately it has me scratching my head even further. I understood the cesium reservoir and how they puncture the disk to release the cesium. Below that must be the actual oven reservoir that creates the stream. Unless the lineups backwards. I

Re: [time-nuts] TAPR Oncore M12+ kit

Worth looking closely at these if you've bought one. On mine, apart from the connector to the DB9 being pulled off and some pins bent, which I could fix, there are two tiny SM ceramic caps that have been knocked off the M12 GPS board, both hanging by one of the detached PC traces. This I

Re: [time-nuts] Spirent STR4500 GPS simulator

I would check if the instrument contains a FDTI USB to serial converter part with a custom VID/PID. That's a common trick. That's trivial to work around, at least on Linux. -ch 73 de AI6KG On Wed, Apr 5, 2017 at 1:05 PM, Bob kb8tq wrote: > Hi > > > > > > On Apr 5, 2017, at

Re: [time-nuts] Line Frequeny Stablity

Another purpose of the reheat process is to control moisture. The term "moisture" here describes the amount of liquid water in the steam as it flows through the system. The spec for this is generally about .25% moisture. The temperature of the steam exiting the boiler is very close to the

Re: [time-nuts] TU30 jump second

Hi OK I will try out to see what Lady Heather can do for me. However, I use a MCU for reading the GPS and not all the time so perhaps I have to change this. Björn can you remember something about the reason for the behavior? Thanks Bo ___ time-nuts

Re: [time-nuts] Line Frequeny Stablity

Perhaps I should have clarified that while the synchronous machines all run at the same frequency, that frequency depends on the balance of steam (or hydraulic) power to the turbines that spin the generators and the aggregate power demand. When the power is not balanced, the frequency of the