Re: [time-nuts] WWVB NIST Radio Time Receiver

2010-10-19 Thread Hal Murray
> All the commercial "atomic clocks" clocks I have seen only do time > corrections every hour to save on the battery consumption. I thought it was only once per day, around 2 AM where the propagation was best. -- These are my opinions, not necessarily my employer's. I hate spam. _

Re: [time-nuts] WWVB NIST Radio Time Receiver

2010-10-19 Thread mike cook
horses for courses. All the commercial "atomic clocks" clocks I have seen only do time corrections every hour to save on the battery consumption. With one of these receivers ( there is even a link to a homebrew clock project on the referenced page comments tab) you get continuous time code

Re: [time-nuts] Cesium standard prices

2010-10-19 Thread Bill Hawkins
Perrier, I have a FTS (Datum) 4040A CS standard with large foamed shipping case for $500. Yes, it works. Does not have a computer interface, but does have a C field adjustment just behind the rack ears on the left side. Paid $1200 for it in a local sale several years ago. Used it, but the power b

Re: [time-nuts] 60KHz Antenna Cont'd

2010-10-19 Thread Bill Hawkins
Perrier, You may have missed some bits. The plans are in the archives, or ask John, your list manager. The coax is 1/4" in diameter but doesn't have an RG designation on the cable. I used it indoors near a window because 60 KHz isn't greatly affected by wooden construction. There is no resonating

Re: [time-nuts] WWVB NIST Radio Time Receiver

2010-10-19 Thread WB6BNQ
Brian, As only one of the listed frequencies are usable in the US, you would do better buying an "ATOMIC" clock at your local Walmart for around $20. That way you also get a nice display and it includes the same basic receiver inside. BillWB6BNQ Heathkid wrote: > Has anyone here bought on

[time-nuts] WWVB NIST Radio Time Receiver

2010-10-19 Thread Heathkid
Has anyone here bought one of these and given it a try? http://www.sparkfun.com/commerce/product_info.php?products_id=10060 Looks like it might be fun to play with... 73 Brice KA8MAV ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go

[time-nuts] Cesium standard prices

2010-10-19 Thread Perry Sandeen
Gents, Time nut junkie that I am, I’d like to someday acquire a cesium standard. Several questions: price for a reasonably working unit. Any specific model that one should look for? What about the AS IS HP units that show up on epay? And if you get one how can you know or test it that it’s s

[time-nuts] TestEquipTrader Cont’d

2010-10-19 Thread Perry Sandeen
Gents, Wrote: <1. TestEquipTrader is NOT a "site". It is a Yahoo Group, an email reflector, like febo. To access the files, etc. you have to join the Group: http://groups.yahoo.com/group/TestEquipTrader/join Thanks, now I know how to join it. Wrote< 2. Lothar has good stuff at good prices, bu

[time-nuts] 60KHz Antenna Cont'd

2010-10-19 Thread Perry Sandeen
Gents, Wrote: < John's antenna should be in the archives. Just 100 feet of RG-58 wound on a 4 foot diagonal PVC pipe frame, with the shield split at 50 feet, IIRC. Tried resonating it, got unstable results. Could you please elaborate on the construction details such as co-ax used, indoors or

Re: [time-nuts] WWVB 60 kHz Loop Antenna Progress

2010-10-19 Thread paul swed
Bill what are you asking on the spectracom and model number please? Regards Paul. On Tue, Oct 19, 2010 at 10:14 PM, Bill Hawkins wrote: > As I understand it, 60 KHz information is so slow that phase > information is critical. Why would anybody use a resonant > antenna in that situation? The phas

Re: [time-nuts] WWVB 60 kHz Loop Antenna Progress

2010-10-19 Thread Bill Hawkins
As I understand it, 60 KHz information is so slow that phase information is critical. Why would anybody use a resonant antenna in that situation? The phase shift from day to night is more than enough to work around. I used a non-resonant antenna proposed by John Ackermann against Z3801 outputs and

Re: [time-nuts] WWVB 60 kHz Loop Antenna Progress

2010-10-19 Thread Bob Paddock
On Tue, Oct 19, 2010 at 7:16 PM, Magnus Danielson wrote: > But then again, avoid the issue and go for a black hole antenna amplifier. I've been gathering information on Black Hole Antennas for a while on my web site: http://www.unusualresearch.com/Sutton/sutton.htm Anyone come across anything

Re: [time-nuts] WWVB 60 kHz Loop Antenna Progress

2010-10-19 Thread Magnus Danielson
On 10/19/2010 11:59 PM, Bob Camp wrote: Hi Also consider that there is a maximum practical Q for a rod antenna. Past a certain point the Q goes up because the flux is better contained. For an antenna to work, the flux can't be fully contained. Simply put, a toroid or pot core will make a very

Re: [time-nuts] WWVB 60 kHz Loop Antenna Progress

2010-10-19 Thread Bob Camp
Hi Also consider that there is a maximum practical Q for a rod antenna. Past a certain point the Q goes up because the flux is better contained. For an antenna to work, the flux can't be fully contained. Simply put, a toroid or pot core will make a very high Q inductor. Both make really lousy a

Re: [time-nuts] WWVB 60 kHz Loop Antenna Progress

2010-10-19 Thread Poul-Henning Kamp
In message <4cbde533.9080...@att.net>, Brooke Clarke writes: >Hi: > >I've been winding a number of loops for WWVB and have one that looks >good on test equipment. You should do a test where you warm the rod+windings in your hand, I found the center frequency would drift significantly with even mi

[time-nuts] WWVB 60 kHz Loop Antenna Progress

2010-10-19 Thread Brooke Clarke
Hi: I've been winding a number of loops for WWVB and have one that looks good on test equipment. A number of the C-Max CMMR-6P-60 receivers are on order so different loop designs can be compared at the same time. For some data, including a spectrum analyzer plot showing 20 dB s/n at 9:00 am (i

Re: [time-nuts] HP 10811

2010-10-19 Thread EWKehren
Thank you Rick, you obviously must know. Bert Kehren In a message dated 10/19/2010 12:02:11 P.M. Eastern Daylight Time, rich...@karlquist.com writes: I think you should probably be fine at 18V. The oven will run down to at least 15V and maybe 12V. Rick Karlquist N6RK On 10/19/2010 5:27

Re: [time-nuts] HP 10811

2010-10-19 Thread Richard (Rick) Karlquist
I think you should probably be fine at 18V. The oven will run down to at least 15V and maybe 12V. Rick Karlquist N6RK On 10/19/2010 5:27 AM, ewkeh...@aol.com wrote: I plan on replacing the Xtal Osc. of my HP 5062C with a HP 10811 since I have a few ones with AV less than 1E-12 from 1 to 100

[time-nuts] HP 10811

2010-10-19 Thread EWKehren
I plan on replacing the Xtal Osc. of my HP 5062C with a HP 10811 since I have a few ones with AV less than 1E-12 from 1 to 100 sec. I would like to use the +18 Volt in the unit for heater. Has any one experience with running the 10811 below 20 Volt, any thing I should look out for? Thanks

Re: [time-nuts] Does TIME-NUTS LIST-SERV allow CLASSIFIED "For-Sale" private advertisment?

2010-10-19 Thread Alan Melia
You must also bear in mind that this a world-wide list. personally I would not be interested in sales of test equipment within the US, and I would not look here for equipment I might like to own. (Others in the Europe might) However, I would not object to a note that some gear is avilable and a det