Re: [time-nuts] TAPR GPS kit end plates update

2017-05-21 Thread Frederick Bray
Steve, I assume that you received my payment? I sent it the day that you advised everyone of the total Thanks. Fred On 5/21/2017 3:42 PM, Steve - Home wrote: Jerry is making rapid progress with the machine work on the end plates and should be contacting those who have paid to provide you

Re: [time-nuts] Z3801 Update with VP-Oncore 8Ch receiver

2016-02-07 Thread Frederick Bray
This brings up a question that I have been wondering about. Has anyone tried using one of the Synergy M12/adaptor board assemblies as an update in the Z3801 or similar unit? If the original firmware just ignores the extra data, perhaps the Synergy unit might work? They are quite inexpensive

Re: [time-nuts] Ebay KS-24361 may be gone. I emailed ASI to confirm.

2014-11-17 Thread Frederick Bray
Looks like the price has now gone back up to $200. It will be interesting to watch to see how many sell at that price and whether they go back on sale. At this point, 55 are reported sold with more than 10 available. In terms of quantity available, the old/original shipping label on mine

Re: [time-nuts] Measuring TV delays

2014-01-02 Thread Frederick Bray
We have noticed the same problem on some channels with Charter here in southern Calif. As noted, there can be a problem with recordings as a result. F. W. Bray Sent from my CP/M phone! On Jan 2, 2014, at 9:48, Joe Leikhim jleik...@leikhim.com wrote: Here in Orlando, Brighthouse seems to

[time-nuts] WWVB Receiver

2013-07-01 Thread Frederick Bray
For those who are looking for a source of WWVB receivers / chips there is a person in the UK who is selling the Symtrik board and antenna on ebay -- item 23099171331. Unfortunately, the chip is embedded in expoy but it does have a 1 pps LED. Here is the link to the data sheet:

Re: [time-nuts] Ovenaire OSC 49-61C

2013-06-12 Thread Frederick Bray
Hi Mark, I am not sure about the design of your OCXO but recently I repaired an Ovenaire from a Cushman 5510 service monitor. I found that there was a bad trimmer pot in the oven control circuit. This wasn't apparent until I started monitoring the current drawn by the unit while trying to

Re: [time-nuts] Connector For Trimble/Nortel GPSTM (NTGS50AA) ?

2013-06-03 Thread Frederick Bray
So, I gather that most folks are just connecting power to the appropriate 2 pins on the 110 position connector. I wasn't sure whether people were wiring directly to the DC converter. Thanks. Fred On 6/3/2013 3:53 AM, Erno Peres wrote: there is only a 48Volt connection and some unknown

[time-nuts] Connector For Trimble/Nortel GPSTM (NTGS50AA) ?

2013-06-02 Thread Frederick Bray
Several months ago, I picked up one of the Trimble/Nortel GPSTM (NTGS50AA) boards. I am trying to find a part number for the mate to the 110 pin Z pack connector. It looks like Digikey part no. A97846-ND might do the trick. Has anyone identified the correct connector. Thanks. Fred Bray

Re: [time-nuts] 8566B with Ovenaire 10Mhz oven.

2013-05-29 Thread Frederick Bray
Hi Mark, Did you see this site? This person also had the unlock problem and some others. http://www.jvgavila.com/hp8566a.htm I just worked on an Ovenaire in an old Cushman service monitor. I thought that the oven was bad because it didn't seem warm compared to other OCXO's I have seemed.

[time-nuts] Thunderbolt MV-89a OCXO Transplant?

2013-05-28 Thread Frederick Bray
Looking at the archive, I noticed that several months ago someone commented that the Morion MV 89A was a direct replacement for the OCXO in the Trimble Thunderbolt in the sense that the Thunderbolt PC board is configured to accommodate it. However, I wasn't able to find further details. I

Re: [time-nuts] Thunderbolt MV-89a OCXO Transplant?

2013-05-28 Thread Frederick Bray
On 5/28/2013 9:52 AM, Bob Camp wrote: The MV89A is a 5 MHz resonator doubled to 10 MHz, it will have sub harmonics that the original OCXO (using a 10 MHz resonator) does not have. This certainly explains what I saw when I looked at a MV89A on a spectrum analyzer and saw a signal /below/ the

Re: [time-nuts] OCXO Adjustment Question

2013-05-19 Thread Frederick Bray
Thanks for the info. I had a general idea that it might be something like this, but it's helpful to know what to look for. I won't have time to dig into it until next weekend. Unfortunately, HP's documentation is not generally available so it may take some exploring. On 5/19/2013 4:02 PM,

[time-nuts] Ovenaire OCXO -- Final Diagnosis Summary

2013-05-19 Thread Frederick Bray
I may not have mentioned that I think I figured out the underlying problem with this OCXO lies with the trimpot in the oven control circuit. (I believe that someone mentioned this as a possibility, so I can't take credit for finding it on my own.) Some of the other things I did helped, but

Re: [time-nuts] OCXO shock protection

2013-05-19 Thread Frederick Bray
That is an interesting question. I am in the greater LA area and have several pieces of test gear with OCXO's. I have never taken any precautions other than making sure that the gear can't fall off the shelf or bench. Then again, I may not be doing things to time-nuts standards. There are

Re: [time-nuts] OCXO Adjustment Question

2013-05-08 Thread Frederick Bray
Thanks for all the helpful suggestions and comments so far. I will answer a few of the questions that have been raised. The device definitely is an OCXO as it is in an oven and gets warm. It is an Ovenaire 73-25. As one person commented, there are two 10 MHz outputs on the device.

Re: [time-nuts] OCXO Adjustment Question

2013-05-08 Thread Frederick Bray
One point of clarification. In my last post I said: So far, the range seems to be from around 9.75 to 10.25 and it has been on for over 18 hours. That is not how much it drifts, but rather the range over which the frequency on the counter has varied as I have tried to touch up the

Re: [time-nuts] OCXO Adjustment Question -- Oven Cycling

2013-05-08 Thread Frederick Bray
One of the things I hadn't adequately considered was how quickly / much the oven cycling affects things. I wasn't really thinking about this when tweaking the adjustment so I wasn't doing them at a consistent point in the cycle. Now, it looks like it may be cycling from a low of 10.01 to

[time-nuts] OCXO Adjustment Question

2013-05-07 Thread Frederick Bray
This might be slightly off-topic, but probably there is a time-nut who knows the answer. I am trying to adjust the 10 MHz OCXO in a Cushman 5110 service monitor. I am using a frequency counter driven by a GPSDO. Perhaps someone can educate me about a couple problems I am encountering. I

Re: [time-nuts] GPS Jammer

2012-10-03 Thread Frederick Bray
Some 20 to 25 years ago a law enforcement agency in California was experimenting with GPS in its patrol cars. It required that the officer press key to report his/her location. It also had a pinging capability that the officers didn't know about. Through pinging, it was discovered that a number

Re: [time-nuts] NTGS50AA, better than Thunderbolt?

2012-05-26 Thread Frederick Bray
I unpacked by NTGS50AA board this evening. Fortunately, the used sticker attached by the seller was small and easy to remove. On mine, the 10 MHz oscillator says Trimble and has a part number of 34310-0 with a date code of 0002. It has a S/N of 1669-12028. I hope that this is of use to

[time-nuts] NTGS50AA Pin-out Info

2012-05-26 Thread Frederick Bray
As the proud owner of a new to me NTGS50AA, I have a couple of questions. First, has anyone posted list of the pin-out for the Z pack connector? I am particularly interested in the power, to start with, so that I can check out the board. I may have overlooked any such posting. Second,

Re: [time-nuts] NTGS50AA, better than Thunderbolt

2012-05-20 Thread Frederick Bray
I have one arriving that I will probably pick up at the post office tomorrow. I ordered it before the price and shipping went up. I will take a look and see whether there are any readable markings on the oscillator. If so, I'll post them here. Now if these units only had a 1PPS output . .

Re: [time-nuts] Oh dear

2012-05-07 Thread Frederick Bray
And for those who want a good debunking article to show to their non-technical friends: http://www.audioholics.com/education/cables/power-cables On 5/7/2012 8:01 AM, Poul-Henning Kamp wrote: In message226574.14407...@smtp104.sbc.mail.mud.yahoo.com, Burt I. Weiner w rites: Be sure to check

Re: [time-nuts] NTGS50AA, better than Thunderbolt

2012-05-03 Thread Frederick Bray
I bought one this morning when the shipping was $30. Since I was out for the day, I didn't have a chance to pay for it until this evening. The shipping charge was not changed. Apparently, it is calculated and frozen by ebay at the time of purchase. My guess is that he couldn't raise the

[time-nuts] Slightly OT -- Terminal Strip Covers?

2011-12-28 Thread Frederick Bray
This is slightly OT, but what are people using to protect the line inputs on barrier terminal strips on power supplies often used to power Thunderbolts and FE-5680A's? On things like the Mean Well and similar supplies the AC line terminals are not fully enclosed. I happened to have an

[time-nuts] Using Thunderbolt to Discipline FE 5680A?

2011-12-22 Thread Frederick Bray
Has anyone successfully used a Thunderbolt to discipline a FE-5680A? I thought I saw a posting or site where someone disabled the 10 MHz oscillator on the Thunderbolt and used the Thunderbolt to discipline the FE-5680A. However, I can't find it now. Thanks. Fred

Re: [time-nuts] Ebay FE-5680A Rb I see the price has gone up for these

2011-12-13 Thread Frederick Bray
Anyone who is interested in buying these units should take a look at the completed listings and be guided accordingly when making an offer. I recently picked up a couple for ~ $35 each, including shipping. True the price may be going up, but it looks like you can still get them for under $40

Re: [time-nuts] Symmetricom TimeSource 2700

2011-11-24 Thread Frederick Bray
Thanks for that information. I had assumed that it was obtained from the cell towers -- after all, my cellphone does show local time. I was hoping that there would be a TOD output. Still the device is very nice and useful as a frequency standard. On 11/24/2011 8:25 AM, Charles P.

[time-nuts] Differences / Jitter Between Frequency Standard Sources

2011-11-24 Thread Frederick Bray
I have what would probably be considered to be a newbie question, so please excuse my likely ignorance. I have a HP 5385A frequency counter, which I am using with an external standard. If I try to compare one 10 MHz standard against another, using one as the external standard and the other

Re: [time-nuts] Differences / Jitter Between Frequency Standard Sources

2011-11-24 Thread Frederick Bray
Thanks to all who replied. I thought that it was a counter artifact, but I didn't know why. Any suggestions for a reasonably priced good frequency counter that uses the reciprocal method? I saw there were a couple TF830's on ebay, but they were outside the U.S. The HP 5340A looks like it

Re: [time-nuts] Differences / Jitter Between Frequency Standard Sources

2011-11-24 Thread Frederick Bray
Looks like my counter is reciprocal. Thanks for the info. Fred Bray W6WAW ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Symmetricom 2700 Time Source

2011-11-21 Thread Frederick Bray
Kevin, Thanks for all the information re: the internal wiring. It sounds like the 1 PPS output that was tested must be somewhere on the board, even if it isn't used. In looking at the test data, it appears that the boards were tested before final assembly. I am inferring this from the fact

Re: [time-nuts] Symmetricom 2700 Time Source

2011-11-20 Thread Frederick Bray
I just got mine unpacked and powered up. So far, it looks good, with at least 6 usable pilots. I hope to use it as a house standard, as it is a lot easier to set up a CMDA antenna for my garage workshop than to do an antenna run for my GPSDO. I see that there is a time of day output and that

Re: [time-nuts] Symmetricom 2700 Time Source

2011-11-20 Thread Frederick Bray
Update: Looks like the time of day function is not implemented in the 2700. I have not opened it up to see if this is a software or hardware issue. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Symmetricom 2700 Time Source

2011-11-20 Thread Frederick Bray
There appears to be a 1pps function. The test documentation that came with mine showed that step # 22 of the TS2700 PANEL TEST was a 1 PPS output test. As I recall from prior reading, there appears to be such an output on the PRS10. It would be interesting to figure out where this was