[time-nuts] Frequency reference

I'm looking for a frequency reference for my home lab. Cost is an issue. I'm considering either a GPSDO such as the Trimble Thunderbolt if I can get one at a reasonable price, or possibly a rubidium source. I would also consider building my own GPSDO (possibly using an Oncore UT+), but don't

Re: [time-nuts] Frequency reference

David C. Partridge wrote: I'm looking for a frequency reference for my home lab. Cost is an issue. I'm considering either a GPSDO such as the Trimble Thunderbolt if I can get one at a reasonable price, or possibly a rubidium source. David, to be considered a true time nut, you will not ever

Re: [time-nuts] Frequency reference

Give me time (accurate time of course) - we all have to start with one standard. Seriously though, if I've got that sort of budget, can I do better than a thunderbolt? Thanks Dave -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dan Rae Sent: 17 April

Re: [time-nuts] Frequency reference

David C. Partridge wrote: Give me time (accurate time of course) - we all have to start with one standard. Seriously though, if I've got that sort of budget, can I do better than a thunderbolt? For £150 total, say $300 US, I don't think so, but what do others think? You will need to add

Re: [time-nuts] Frequency reference

You can build a very good GPSDO for about $100 in parts. Google N1JEZ. 73, Dick, W1KSZ -Original Message- From: David C. Partridge [EMAIL PROTECTED] Sent: Apr 17, 2008 2:24 AM To: time-nuts@febo.com Subject: [time-nuts] Frequency reference I'm looking for a frequency reference for my

[time-nuts] HP 59309A clock available

Hi Jeff, Sure, I'll post your note to the time-nuts list and see if anyone would like your 59309A clock. They can contact you *offline* for shipping details. It's a cute clock, I can see why you don't want to throw it away. Thanks for your kind offer to pass it on to someone on the list. /tvb

Re: [time-nuts] HP 59309A clock available

Hi, I would like very much to have your HP-59309A clock Bruce [EMAIL PROTECTED] - Original Message - From: Tom Van Baak [EMAIL PROTECTED] To: Lifereef [EMAIL PROTECTED] Cc: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, April 17, 2008 12:28 PM

[time-nuts] Power monitoring

My power went out the other day. That reminded me that I've always been slightly curious about that area. Are there any not-expensive boxes made for this? Or something that shows up on eBay occasionally? If I was doing it myself, I'd start with a low power (quiet) PC and a UPS. Then I'd

Re: [time-nuts] Power monitoring

Hal Murray wrote: My power went out the other day. That reminded me that I've always been slightly curious about that area. Our telescope suffers from flaky mountain power, so we have to do this sort of thing. The problem is sending a message that the power went out to the university

Re: [time-nuts] Power monitoring

Quoting Hal Murray [EMAIL PROTECTED], on Thu 17 Apr 2008 11:10:11 AM PDT: My power went out the other day. That reminded me that I've always been slightly curious about that area. Are there any not-expensive boxes made for this? Or something that shows up on eBay occasionally? Lots of

Re: [time-nuts] Power monitoring

In message [EMAIL PROTECTED], Jim Lux writ es: As long as I'm dreaming... Suppose I wanted to measure the power my whole house is drawing. What's available along the lines of a current transformer on the main lines? My first thought is that nobody does that (for homes) so it's probably

Re: [time-nuts] Power monitoring

Poul-Henning Kamp wrote: In message [EMAIL PROTECTED], Jim Lux writ es: As long as I'm dreaming... Suppose I wanted to measure the power my whole house is drawing. What's available along the lines of a current transformer on the main lines? My first thought is that nobody does that

Re: [time-nuts] Power monitoring

Quoth Hal Murray at 2008-04-18 03:40... My power went out the other day. That reminded me that I've always been slightly curious about that area. Are there any not-expensive boxes made for this? Or something that shows up on eBay occasionally? Firstly, I'll second the suggestion to use

Re: [time-nuts] Power monitoring

You're in luck! Much of what you want to do can be done for almost nothing. Several years ago when I was interested in knowing more about the power coming to my PCs I had a Uninterruptable Power Supply made by APC (American Power Conversion). Most of their models, except for the very lowest price

Re: [time-nuts] Power monitoring

Our telescope suffers from flaky mountain power, so we have to do this sort of thing. The problem is sending a message that the power went out to the university campus from the mountaintop over a network that may not be working because the power went out. Many steps of communication

[time-nuts] Oncore Checksums

Hi Folks I've been reading various notes on the Oncore protocol that have been suggested to me and have written a little bit of Perl that - I think - will output the correct set of bytes that should be sent to a receiver given a specific message. If anyone is able to verify that I've got this

Re: [time-nuts] Oncore Checksums

int oncore_checksum(char *buf, int len){ unsigned char a, b; int i; a = buf[len-3]; b = '\0'; for(i = 2; i len - 3; i++) b ^= buf[i]; if (a == b) return 0; return 1; } On Thu, Apr 17, 2008 at 6:26 PM,

Re: [time-nuts] Oncore Checksums

Quoth Chris Kuethe at 2008-04-18 10:59... int oncore_checksum(char *buf, int len){ unsigned char a, b; int i; a = buf[len-3]; b = '\0'; for(i = 2; i len - 3; i++) b ^= buf[i]; if (a == b) return 0; return 1; }

Re: [time-nuts] Oncore Checksums

On Thu, Apr 17, 2008 at 6:51 PM, Matthew Smith [EMAIL PROTECTED] wrote: Quoth Chris Kuethe at 2008-04-18 10:59... int oncore_checksum(char *buf, int len){ unsigned char a, b; int i; a = buf[len-3]; b = '\0'; for(i = 2; i len - 3; i++)

Re: [time-nuts] time-nuts Digest, Vol 45, Issue 34

Dennis, Ah-ha. Now here's the rub! I've got 2 such APC Smart UPS - but I cannot find, beg, borrow or steal a copy of the PowerChute software from anywhere. Does anyone have a copy lurking unwanted unloved in their 3.5 floppy cabinet ? Cheers, Kit VK2LL Message: 4 Date: Thu, 17 Apr 2008

Re: [time-nuts] Power Monitoring

Quoth Kit Scally at 2008-04-18 11:37... Ah-ha. Now here's the rub! I've got 2 such APC Smart UPS - but I cannot find, beg, borrow or steal a copy of the PowerChute software from anywhere. Does anyone have a copy lurking unwanted unloved in their 3.5 floppy cabinet ? Try here:

Re: [time-nuts] Oncore Checksums

Quoth Chris Kuethe at 2008-04-18 11:29... yeah, i should've mentioned, that's function i use to check the sum, not compute it. return b instead, or just patch the buffer inside the function: Ah, thanks. I suppose I should use that checksum checker in the Nixie clock I'm building. I'm going

[time-nuts] week 1024 roll over

I recently bought a Datum GPS Time/frequency System 9390-5593. When I enter date, time and location, it fails to indicate GPS lock. It is indicating GPS week 451, when the week is really 1475. It is also indicating that the day is 246. I highly suspect that the receiver has firmware that needs