Re: [time-nuts] a newbie question: where can I purchase 794.7nm VCSEL for building CPT rubidium clock?

[Steve - Home]

It’s an older Efratom rubidium frequency reference. 

Steve




> On Jun 9, 2018, at 8:34 AM, Dana Whitlow  wrote:
> 
> What is an 'FRK'?
> 
> Thanks,
> 
> Dana
> 
> 
>> On Sat, Jun 9, 2018 at 7:51 AM, ew via time-nuts  wrote:
>> 
>> Having followed the conversation and having looked at the p[possibility
>> using a FRK with laser diode, it is low on our list because of all the
>> ongoing projects but please if you want to spend time and money use any
>> thing but a FE5680. I was one of the first using it and noticed and posted
>> a 4 Hz constant deviation using my Tracor 527 E subsequent confirmed by the
>> attached. Do not have info as to who posted it.
>> Using a FRK is the easiest way to do so if interested contact me off list,
>> based on our tests is a close second to the HP 5065A.
>> Bert Kehren
>> 
>> In a message dated 6/9/2018 7:23:45 AM Eastern Standard Time,
>> bruce.griffi...@xtra.co.nz writes:
>> 
>> 
>> Theres also
>> 
>> http://www.photonics.philips.com/application-areas/sensing/components
>> 
>> and
>> 
>> https://www.sacher-laser.com/home/industriallasers/point_
>> and_line_laser_module/industrial_laser_modules/micron_laser.html
>> Bruce
>>> On 09 June 2018 at 20:54 mimitech mimitech  wrote:
>>> 
>>> 
>>> Thanks Attila for your suggestion.
>>> 
>>> I prefer the 780/795nm VCSEL scheme for its simplicity. After some
>>> searching, looks like the 780nm VCSELs are also not easy to source,
>>> although other types of 780nm LD are common.
>>> 
>>> I have purchased small amount of Vixar P/N “795S--BC01” 795nm single
>>> mode VCSEL from a local distributor, price is about $500/pcs. I'm not
>> sure
>>> whether this model could work in CPT rubidium clock.
>>> 
>>> A more suitable model maybe Oclaro P/N “APM2101013300” 795nm single mode
>>> VCSEL, with unit price $800, which was proved to work as this paper
>>> "A compact atomic magnetometer for cubesats",
>>> https://open.bu.edu/bitstream/handle/2144/16303/Knechtel_bu_
>> 0017N_11402.pdf
>>> ,
>>> 
>>> this thesis "Ultra-Low Phase Noise Atomic Clock using Coherent Population
>>> Trapping (CPT) in Rubidium"
>>> http://etheses.whiterose.ac.uk/20073/1/Burtichelov_PhD_
>> Thesis_with_papers_V7.pdf
>>> 
>>> and also it was used in commercial CPT rubidium clock - Microsemi SA.3xm
>>> series. The cheapest model is SA.31m priced about $1100 at Digikey /
>>> Mouser.
>>> 
>>> Another paper "VCSEL Laser System for Atomic Clocks"
>>> http://ixnovi.people.wm.edu/documents/NathanBelcherREUPaper.pdf test
>>> several VCSEL from different vendors and found the ULM 794.7 nm single
>> mode
>>> VCSEL can work.
>>> 
>>> Thanks.
>>> 
>>> mimitech.
>>> 
>>> 
>>> On Tue, 5 Jun 2018 11:11:59 +0200, Attila Kinali 
>> wrote:
 
 On Mon, 4 Jun 2018 21:31:56 +0800
 mimitech mimitech  wrote:
 
> I'm planning to build a CPT (coherent-population-trapping) rubidium
>>> clock
> as my next hobby project. The main purpose is to learn the principles
> behind CPT rubidium clock, and hopefully got similar or better
>>> performance
> than commercial miniature rubidium clock such as FE-5680A.
 
 Building a CPT clock is slightly more involved than you might think
 at first. The laser diode is only one part of it. You will most likely
 be able to improve on the short-term stability of the FE-5680 (which
 is rather poor). But I doubt you will be able to improve much on
 the long term stability, which is where things actually become
>>> interesting,
 if you use a naive approach.
 
 Nevertheless, I have not seen many 794/795nm diodes around. The only
 one that I have the datasheet of is the one from Vixar.
 You might want want to consider going for the D2 line instead of the
 D1 line, as 780nm diodes are more commonly available than 795nm. You
>> will
 also need to buy several of those and select the ones that come closest
 to the wavelength at the desired opearating conditions (usuall spread
 is +/-1nm to +/-10nm). Do not assume you can tune more than 0.1nm with
 temperature and current (rule of thumb is that you get about 10GHz
 per °C and mA). If you need more tuning range, you will need to add an
 external cavity (can give you up to 5nm range), which then needs to be
 tuned to the 3.45GHz (ie it's length needs to be approximately 8-9cm).
 
 Alternatively, you can get two S1-0780-XXX from Sacher Laser
 (cost IIRC 2500€ each) and keep them 6.9GHz apart (using an optical
>> PLL).
 If you have enough money to spend, I'd go for two Cateye diode laser
>> CEL's
 from Moglabs (cost AFAIK 5000€ each)
 
 No matter what you choose, you will need some wavelength stabilization
 scheme. You can either do that with the vapor cell itself or use
 an additional cell and do a DVALL or a saturated absorption locking.
 Note that this addtional cell will need to be without buffer gas.
 An external cell will offer better stability and thus lower noise,
 

Re: [time-nuts] Argo AS-210 frame

[Steve - Home]

Jim,

Forgot to add two things. There were two versions of the system - the rack 
mount had 6 slots and the portable had 5. And the rubidium oscillator is an 
Efratom FRK. 

Steve




> On Dec 13, 2017, at 8:03 PM, Steve - Home <steve-kr...@cox.net> wrote:
> 
> Jim,
> 
> I have an AS210 system that is on the “round tuit” list. It worked when I got 
> it years ago but developed problems and had to be set aside. I have the -01A 
> module controller, -02 freq comparator, -03 freq generator (500MHz), -04 
> digital delay gen, and -20 clock module. I haven’t seen one with an 18GHz 
> plug-in; that would be nice.
> 
> I have the manuals somewhere but it would take some archaeology to find them 
> as I’m rearranging the lab.
> 
> One thing I remember is the modules will not work in a TM-series mainframe. 
> Chances are good you would damage both the plug in and the mainframe. I don’t 
> have a TM mainframe handy to see if the case parts might work. Mine was rack 
> mounted and has very basic aluminum panels.
> 
> I’ve had all the modules except the controller out at one time or another. 
> The controller looks to be a bear to remove and I believe that’s where the 
> rubidium oscillator hides. It will be after the new year before I can have a 
> look at mine but I’m happy to help if I can. 
> 
> Steve K. 
> 
> 
> 
>> On Dec 13, 2017, at 6:56 PM, jim stephens <jwsm...@jwsss.com> wrote:
>> 
>> Does anyone have a lead on the oscillator in this frame as far as repair / 
>> replacement?
>> 
>> A friend has one with all the plugins, and one extra spot.  If I understand 
>> it, he also has an 18ghz plugin to fit that.
>> 
>> But currently the oscillator seems kaput.  He's checked all of the fuses he 
>> could get to according to the manual, and is looking for two others that 
>> currently alude him.
>> 
>> If anyone has had one apart and has some words on the process of working on 
>> them, he said he had a hell of a time disassembling things.  Also there are 
>> only shards of part of the case, and he seems to think the sizes of the 
>> panels are custom, and we can't rob from a donor TM-515.
>> 
>> Would appreciate anyone who has worked on one to let us know.
>> thanks
>> Jim
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Re: [time-nuts] Argo AS-210 frame

[Steve - Home]

Jim,

I have an AS210 system that is on the “round tuit” list. It worked when I got 
it years ago but developed problems and had to be set aside. I have the -01A 
module controller, -02 freq comparator, -03 freq generator (500MHz), -04 
digital delay gen, and -20 clock module. I haven’t seen one with an 18GHz 
plug-in; that would be nice.

I have the manuals somewhere but it would take some archaeology to find them as 
I’m rearranging the lab.

One thing I remember is the modules will not work in a TM-series mainframe. 
Chances are good you would damage both the plug in and the mainframe. I don’t 
have a TM mainframe handy to see if the case parts might work. Mine was rack 
mounted and has very basic aluminum panels.

I’ve had all the modules except the controller out at one time or another. The 
controller looks to be a bear to remove and I believe that’s where the rubidium 
oscillator hides. It will be after the new year before I can have a look at 
mine but I’m happy to help if I can. 

Steve K. 



> On Dec 13, 2017, at 6:56 PM, jim stephens  wrote:
> 
> Does anyone have a lead on the oscillator in this frame as far as repair / 
> replacement?
> 
> A friend has one with all the plugins, and one extra spot.  If I understand 
> it, he also has an 18ghz plugin to fit that.
> 
> But currently the oscillator seems kaput.  He's checked all of the fuses he 
> could get to according to the manual, and is looking for two others that 
> currently alude him.
> 
> If anyone has had one apart and has some words on the process of working on 
> them, he said he had a hell of a time disassembling things.  Also there are 
> only shards of part of the case, and he seems to think the sizes of the 
> panels are custom, and we can't rob from a donor TM-515.
> 
> Would appreciate anyone who has worked on one to let us know.
> thanks
> Jim
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[time-nuts] TAPR GPS Kit end plates

[Steve - Home]

A few weeks ago we wrapped up the end plate project. We had only 1 non-payer in 
the end, Tom Vojtek K1ADR, who hadn't responded to emails regarding payment so 
Tom's set and the extra sets of plates we ordered for engineering assessment 
were spoken for and I've had a few people ask about a second run of plates. 

Jerry, the machinist who deserves the time-nuts Volunteer of the Year award for 
the time and effort he put into the end plate project, agreed to do a second 
run of plates. 

I will place another order under the same conditions as the first order:
• Cost based on final quantity ordered. Cost will be higher as the numbers will 
be smaller so the quantity discount will be less. Plate cost and all shipping, 
plus PayPal fees, should be paid to me once the final cost is known
• From the above I will pay Jerry for the shipping from him to you so there 
will only be one PayPal fee
• If we don't have enough orders to meet the required $100 minimum I'll let 
everyone know and those who missed out will need to find alternate ways to 
close up the box and mount the connectors. 

I would ask those of you who had contacted me about a second purchase of plates 
to please contact me again now that the door is open for another order. 

Thanks,

Steve
WB0DBS



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Re: [time-nuts] GPS Kit Plates

[Steve - Home]

Jerry,

Greg is referring to the adapter cable to split the power and pps out of the 
DB9. 

There may be enough interest to do a small second round. The prices would be 
higher due to the lower quantity. I'll give it some thought while I'm on my 
short overseas assignment June 4-11. 

Happy Memorial Day, everyone!

Steve
WB0DBS



> On May 27, 2017, at 4:14 PM, Jerry Hancock  wrote:
> 
> Greg, to which adapter cable are you referring?  From the PC to the DB9?
> 
> What I did in the meantime was use breadboarding jumpers.  The square female 
> ends typically will press onto the DB9 male pins.
> 
> Glad they fit your need.
> 
> Steve, sounds like there won’t be another round?
> 
> Jerry
> 
> 
>> On May 27, 2017, at 2:04 PM, Gregory Beat  wrote:
>> 
>> Steve and Jerry -
>> 
>> Thank you for coordinating the acquisition and machining of these End Panels 
>> for the TAPR GPS Experimenters Kit.  I understand these kits (SynPaQ/E 
>> version XTS) are EXHAUSTED at TAPR.  Check the TAPR web site for details.
>> https://www.tapr.org/gps_exp-kit.html
>> 
>> The End Panels arrived from Jerry this afternoon (Saturday, USPS Priority).
>> They were well packed and I found no oil on my end panels.
>> 
>> The VCC lens cap and 
>> http://www.mouser.com/ProductDetail/VCC/CMS322CTP/?qs=YfTKvZjIiZx%2FK6G184oH6A%3D%3D
>> Retaining ring (Mouser) for Front Panel LEDs fit perfectly.
>> http://www.mouser.com/ProductDetail/VCC/RNG_268/?qs=%2fha2pyFaduhfGvQXQvy97Y4tfuHua2s5JninzMNF16XefMczA6YdRg%3d%3d
>> 
>> The TAPR kit does not include the "jack screws" for the DE-9 connector.
>> I had these in my parts drawer, Jameco part number: 16548 (75 cents/set).
>> http://www.jameco.com/z/14-522-R-Jack-Screw-Nut-Washers-Set-4-40-Hex-0-187-W-x-0-187-H-x-0-315-L-Thread_16548.html
>> 
>> The kit Looks Great (like new).  Now to build the Adapter Cable this weekend.
>> https://www.tapr.org/images/com-cbl.jpg
>> 
>> greg, w9gb
>> 
>> > Subject: [time-nuts] GPS Kit Plates
>> >
>> > Hello again, fellow curmudgeons,
>> >
>> > I sent out more shipping notices this morning and plan to hit the PO in 
>> > about 5 hours.
>> >
>> > When you receive your plates and prior to mounting, please clean them with 
>> > soap and > water or even windex or simple green.  I cleaned the machine 
>> > oil off to the limit of my > patience but there might be a little left.  
>> > I’ve not seen any interaction between the  
>> > machine oil, windex, etc with the coating.
>> >
>> > Regards,
>> >
>> > Jerry
>> 
>> 
>> 
>> Sent from iPad Air
> 
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[time-nuts] TAPR GPS kit end plates update

[Steve - Home]

There are still a number of people who have not paid for their end plates. They 
will be held by the machinist and won't ship until both he and I have received 
payment.

At this point I'm not into publicly listing the non-payers but it represents a 
fair chunk of money out of my pocket and a lot of time out of the machinist's 
valuable offer to the group.

Please pay what you owe through PayPal to me by Friday midnight CDT. After that 
the names will be listed so others don't get burned. I did this as a favor to 
the group but I did not offer to lose money on the favor!

Steve
WB0DBS



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

[Steve - Home]

Hi Fred,

Yes, got it and thanks!

Steve
WB0DBS



> On May 21, 2017, at 10:47 PM, Frederick Bray <fwb...@mminternet.com> wrote:
> 
> 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 with the follow on 
>> postage cost.
>> 
>> After going through the weekend mail and a PayPal update today, there are 
>> still 10 people who haven't paid. That represents 40 plates we're holding. 
>> Please pay by Friday May 26 or we'll have to offer them to others. I've also 
>> had a couple of requests after the initial order had closed. If I have 
>> cancellations or no-pays I will first fill additional orders from those 
>> before looking at a second order. I don't think we'll get as good a discount 
>> on the second order, if there is one, as the quantity will be much smaller.
>> 
>> Here is some additional information from a list member who made the kits 
>> possible. There are clear lenses available for the LED holes that will dress 
>> up the front panel but are not necessary for proper operation in a lab or 
>> shop environment. The lenses are available from Mouser Electronics, part 
>> number 593-3220C, manufacturer's part number CMS322CTP. The retainer for the 
>> lens is Mouser part number 593-RNG268, manufacturer's part number RNG268. 
>> Lenses are $1.44 each in small quantities, retainers are $.26 in small 
>> quantities. You'll want 4 of each. You'll have to slightly enlarge each hole 
>> to accommodate the lenses. Again, these are not necessary for proper 
>> operation.
>> 
>> Steve
>> WB0DBS
>> 
>> 
>> 
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>> 
> 
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[time-nuts] TAPR GPS kit end plates update

[Steve - Home]

Jerry is making rapid progress with the machine work on the end plates and 
should be contacting those who have paid to provide you with the follow on 
postage cost. 

After going through the weekend mail and a PayPal update today, there are still 
10 people who haven't paid. That represents 40 plates we're holding. Please pay 
by Friday May 26 or we'll have to offer them to others. I've also had a couple 
of requests after the initial order had closed. If I have cancellations or 
no-pays I will first fill additional orders from those before looking at a 
second order. I don't think we'll get as good a discount on the second order, 
if there is one, as the quantity will be much smaller. 

Here is some additional information from a list member who made the kits 
possible. There are clear lenses available for the LED holes that will dress up 
the front panel but are not necessary for proper operation in a lab or shop 
environment. The lenses are available from Mouser Electronics, part number 
593-3220C, manufacturer's part number CMS322CTP. The retainer for the lens is 
Mouser part number 593-RNG268, manufacturer's part number RNG268. Lenses are 
$1.44 each in small quantities, retainers are $.26 in small quantities. You'll 
want 4 of each. You'll have to slightly enlarge each hole to accommodate the 
lenses. Again, these are not necessary for proper operation.

Steve
WB0DBS



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Re: [time-nuts] TAPR GPS Kit endplates update

[Steve - Home]

Rushing to a flight and forgot the PayPal account:
steve-kr...@cox.net. 

Steve
WB0DBS



> On May 12, 2017, at 1:55 PM, Steve - Home <steve-kr...@cox.net> wrote:
> 
> All,
> 
> The endplate order is due to be delivered to the machinist by the end of the 
> day today according to FedEx. 
> Final cost came out to $6.50 per plate, $13.00 per pair. If you pay by check 
> or money order that's your cost, less the follow on postage from the 
> machinist to you. He'll contact you when it's time to pay that part.
> 
> For the initial parts plus shipping you can pay by check or money order to me 
> at:
> Steve Krull
> 1313 N. Emporia Street
> Wichita, KS 67214
> 
> If you choose PayPal their fees are 2.9% + $.30 per order so:
> 1 pair = 13.00 + .38 + .30 = $13.68
> 2 pair = 26.00 + .75 + .30 = $27.05
> 3 pair = 39.00 + 1.13 + .30 = $40.43
> 4 pair = 52.00 + 1.51 + .30 = $53.81
> 
> If anyone needs a copy of the P-M invoice for tax purposes or whatever, I can 
> provide a copy as soon as I'm back from my current overseas duty, on or about 
> 19 May. 
> 
> The machinist will not ship the plates until I confirm I've received your 
> payment and he gets his payment for the follow on postage fees. 
> 
> At this point all end plates are spoken for. If anyone ordered extra and 
> decides to make them available please let the group know and make your own 
> arrangements. 
> 
> Steve
> WB0DBS
> 
> 
> 
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[time-nuts] TAPR GPS Kit endplates update

[Steve - Home]

All,

The endplate order is due to be delivered to the machinist by the end of the 
day today according to FedEx. 
Final cost came out to $6.50 per plate, $13.00 per pair. If you pay by check or 
money order that's your cost, less the follow on postage from the machinist to 
you. He'll contact you when it's time to pay that part.

For the initial parts plus shipping you can pay by check or money order to me 
at:
Steve Krull
1313 N. Emporia Street
Wichita, KS 67214

If you choose PayPal their fees are 2.9% + $.30 per order so:
1 pair = 13.00 + .38 + .30 = $13.68
2 pair = 26.00 + .75 + .30 = $27.05
3 pair = 39.00 + 1.13 + .30 = $40.43
4 pair = 52.00 + 1.51 + .30 = $53.81

If anyone needs a copy of the P-M invoice for tax purposes or whatever, I can 
provide a copy as soon as I'm back from my current overseas duty, on or about 
19 May. 

The machinist will not ship the plates until I confirm I've received your 
payment and he gets his payment for the follow on postage fees. 

At this point all end plates are spoken for. If anyone ordered extra and 
decides to make them available please let the group know and make your own 
arrangements. 

Steve
WB0DBS



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Re: [time-nuts] TAPR GPS Kits

[Steve - Home]

Larry,
No missed emails on your part. I'm waiting on confirmation of the shipment with 
final shipping cost before I calculate a firm price. Hope to have confirmation 
today or tomorrow latest. 

Steve




> On May 11, 2017, at 11:33 AM, Larry McDavid <lmcda...@lmceng.com> wrote:
> 
> Steve, did I miss an email confirming the price of these plates? Did you get 
> a confirmation of your order of the plates?
> 
> I have not paid you yet so please tell me if I missed your email that would 
> trigger my payment.
> 
> Larry
> 
> 
>> On 5/5/2017 10:44 AM, Steve - Home wrote:
>> All,
>> 
>> I've logged all the orders and received a final quote from P-M. We had a 
>> final quantity of 130, of which 116 were ordered drilled. The cost works out:
>> 6.35 per plate, shipping and taxes .80 per plate, total of 7.10 per plate. 
>> If you choose to pay via PayPal versus check or money order, the fees are 
>> .21 per plate plus .30 per order. Please don't pay until I get confirmation 
>> the order has been shipped and charged to my credit card. I'll let you know 
>> when that happens.
>> The plates will be shipped in one box to the machinist who has volunteered 
>> his time and CNC equipment to the group. We ask that you pay for the 
>> shipping from him to you and he will be in touch when the plates are ready 
>> to ship.
>> 
>> Thanks,
>> 
>> Steve
>> WB0DBS
> 
> 
> -- 
> Best wishes,
> 
> Larry McDavid W6FUB
> Anaheim, California  (SE of Los Angeles, near Disneyland)
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[time-nuts] TAPR GPS Kits

[Steve - Home]

All,

I've logged all the orders and received a final quote from P-M. We had a final 
quantity of 130, of which 116 were ordered drilled. The cost works out:
6.35 per plate, shipping and taxes .80 per plate, total of 7.10 per plate. If 
you choose to pay via PayPal versus check or money order, the fees are .21 per 
plate plus .30 per order. Please don't pay until I get confirmation the order 
has been shipped and charged to my credit card. I'll let you know when that 
happens. 
The plates will be shipped in one box to the machinist who has volunteered his 
time and CNC equipment to the group. We ask that you pay for the shipping from 
him to you and he will be in touch when the plates are ready to ship.

Thanks,

Steve
WB0DBS



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[time-nuts] TAPR GPS Kit end plates

[Steve - Home]

All,

The order list is now closed as I have to prepare for another international 
trip. I expect a final price quite today and will update everyone as soon as I 
get it. I will also place the order at that time. All plates will ship direct 
to the list member who will be doing the CNC machine work. He will send the 
blank plates on, do the machine work on the rest, and send them on. If you 
ordered blank and machined plates they'll come in one shipment. He will advise 
what that portion of the shipping cost will be and that needs to be paid 
directly to him.

I need mailing addresses for two purchasers - David S and Arne. Please send 
those as soon as possible.

The cost of the plates plus initial shipping should be paid to me. Payment by 
check or money order to:
Steve Krull
1313 N. Emporia Street
Wichita, KS 67214-2832

If you elect to pay by PayPal my account is steve-kr...@cox.net and please be 
so kind as to add a little for the PayPal fees. I believe their latest fee 
structure is 2.9% + $.30. 

Thanks,

Steve
WB0DBS



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Re: [time-nuts] TAPR GPS kit end plate - final call

[Steve - Home]

Right now the numbers are up substantially and I've asked P-M to hold off until 
later today before giving me a final quote. 

Steve
WB0DBS



> On May 2, 2017, at 7:48 PM, Bob kb8tq <kb...@n1k.org> wrote:
> 
> Hi
> 
> Right now you are at 26 plates. There may be a price break at 25 there might
> be a break above that. It may be simpler to ask them where the breaks are (as
> in “please quote 25 to 100 pieces”) rather than going back and forth multiple 
> times. 
> If the price drops quickly with volume, the number of people interested 
> likely will 
> go up.
> 
> Bob
> 
>> On May 2, 2017, at 4:50 PM, Steve - Home <steve-kr...@cox.net> wrote:
>> 
>> I am about to place the order for the end plates for the TAPR GPS kits. The 
>> order will be shipped to a list member who has offered to put his CNC skills 
>> to work and create the holes in accordance with the drawings provided on the 
>> TAPR web site. 
>> 
>> I have orders logged for:
>> Steve K - 2 plates, drilled
>> Larry M - 6 plates, 4 drilled 2 blank
>> Joe O - 4 plates, drilled
>> Stan P - 2 plates, Stan - drilled or plain?
>> Greg B - 2 plates, blank
>> F.W. B - 6 plates, drilled
>> Francis G - 2 plates, drilled
>> Scott H - 2 plates, - drilled or plain?
>> 
>> All of the above are amateur radio operators and I have mailing addresses 
>> from the FCC database. If anyone wants their plates sent to a different 
>> address please let me know. 
>> 
>> If there are additional orders please contact me off-list ASAP as the order 
>> will be placed as soon as the quote is received from P-M.
>> 
>> The plates will all ship to the machinist in one package and he will drop 
>> the blank plates back in the mail, machine the others and then send them on. 
>> 
>> I've asked for a new quote to show the increased quantity and the shipping 
>> to the machinist. 
>> 
>> Please note there will be an additional shipping cost from the machinist to 
>> you, just as there would be if I had received the order and then mailed them 
>> on to you. The plates are not heavy and may go in a padded envelope or a 
>> small Flat-rate box if you ordered more than one pair. 
>> 
>> 
>> Steve
>> WB0DBS
>> 
>> 
>> 
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[time-nuts] TAPR GPS kit end plate - final call

[Steve - Home]

I am about to place the order for the end plates for the TAPR GPS kits. The 
order will be shipped to a list member who has offered to put his CNC skills to 
work and create the holes in accordance with the drawings provided on the TAPR 
web site. 

I have orders logged for:
Steve K - 2 plates, drilled
Larry M - 6 plates, 4 drilled 2 blank
Joe O - 4 plates, drilled
Stan P - 2 plates, Stan - drilled or plain?
Greg B - 2 plates, blank
F.W. B - 6 plates, drilled
Francis G - 2 plates, drilled
Scott H - 2 plates, - drilled or plain?

All of the above are amateur radio operators and I have mailing addresses from 
the FCC database. If anyone wants their plates sent to a different address 
please let me know. 

If there are additional orders please contact me off-list ASAP as the order 
will be placed as soon as the quote is received from P-M.

The plates will all ship to the machinist in one package and he will drop the 
blank plates back in the mail, machine the others and then send them on. 

I've asked for a new quote to show the increased quantity and the shipping to 
the machinist. 

Please note there will be an additional shipping cost from the machinist to 
you, just as there would be if I had received the order and then mailed them on 
to you. The plates are not heavy and may go in a padded envelope or a small 
Flat-rate box if you ordered more than one pair. 


Steve
WB0DBS



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

[Steve - Home]

All,

To add to the excellent information Art has provided - I spoke with Candice 
Rincon at Phoenix Mecano and just received a quote from her for the end plates. 
There is a $100 minimum order policy at P-M, shipping and taxes additional. The 
end plates with gaskets and screws are $7.25 each so we'll need to order 14 end 
plates to meet the minimum; that's enough to do 7 enclosures. The plates are 
cast aluminum and are blank so you would need to drill your own holes per the 
diagrams Art provided.
I don't know how many GPS kits were sold but if there's enough interest maybe 
we can do a group order. 

Steve
WB0DBS



> On Apr 28, 2017, at 1:18 AM, Art Sepin  wrote:
> 
> Folks,
> 
> The TAPR GPS Kit documentation has been updated and revised for clarity (I 
> hope). it includes details for purchasing end plates and also dimensions 
> required to fabricate end plates. The TAPR GPS Kit document, and a 
> motherboard schematic for reference, is now available on Synergy's "GPS for 
> Scholars" page:
> http://www.synergy-gps.com/index.php?option=com_content=view=54=73
> 
> Art 
> 
> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Gregory Beat
> Sent: Tuesday, March 28, 2017 11:48 AM
> To: Larry McDavid ; time-nuts@febo.com
> Subject: Re: [time-nuts] TAPR Oncore M12+ kit
> 
> Larry -
> 
> Interface Boards for Motorola (and Garmin) receivers have been discussed (and 
> sold) by TAPR since late 1990s.  TAPR archives all of this documentation, for 
> discontinued GPS kits, can be seen on the left margin.
> https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.tapr.org%2Fgps_exp-kit.html=01%7C01%7Cart%40synergy-gps.com%7C4dc2f4b8f72f4e2fc73108d47615ead3%7Cc81f9fdec0e04d8c95779afaa0cad9ed%7C1=5ruapgEiQudgnwP07FQuZd1RF2r23b0YTZnMagdcLkI%3D=0
> 
> Tom Clark, W3IWI Total Accurate Clock (TAC) project (1996) covers the entire 
> topic.
> https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.tapr.org%2Fkits_tac2.html=01%7C01%7Cart%40synergy-gps.com%7C4dc2f4b8f72f4e2fc73108d47615ead3%7Cc81f9fdec0e04d8c95779afaa0cad9ed%7C1=2ddW07UU31UDl5%2FQTy2DspkkX11FX00qrmKfc%2BRnNLw%3D=0
> 
> Simple interface board schematics (Serial Level converters, and voltage 
> adjustments for external antennas/ 3.3 or 5 V) can be found throughout the 
> Internet since mid-1990s.
> Numerous radio amateurs DIY their own (breadboard) or sold small interfaces 
> at hamfests (1996-2006), until newer GPS solutions became surplus (and 
> smartphones with built-in GPS appeared after 2007).
> 
> Doug McKinney, KC3RL (SK, December 2006) offered interface boards for the 
> Garmin (GPS-25) and Motorola receivers until about 2005.  I have one of 
> Doug's boards in my GPS parts box.  These were sold by TAPR until their 
> inventory was exhausted.
> --
> Garmin
> https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.tapr.org%2Fgps_garminib.html=01%7C01%7Cart%40synergy-gps.com%7C4dc2f4b8f72f4e2fc73108d47615ead3%7Cc81f9fdec0e04d8c95779afaa0cad9ed%7C1=1rtHBUexr2FVGuHKY2qxBhzriCuFREe%2F6NAS7gi9RNY%3D=0
> Motorola
> https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.tapr.org%2Fgps_vpib.html=01%7C01%7Cart%40synergy-gps.com%7C4dc2f4b8f72f4e2fc73108d47615ead3%7Cc81f9fdec0e04d8c95779afaa0cad9ed%7C1=R5%2FyBXV%2BAV2%2Fi3e%2BKfPlua5PKMhRqrbUwhIMPrbiArQ%3D=0
> 
> Synergy M12-MB board (web link to photo [jpg] below) IF you look closely at 
> the Synergy Board, you see the board outline and 2x5 (10-pin) header for the 
> earlier 8-channel Motorola receivers
> https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.tapr.org%2Fimages%2FM12-MB.jpg=01%7C01%7Cart%40synergy-gps.com%7C4dc2f4b8f72f4e2fc73108d47615ead3%7Cc81f9fdec0e04d8c95779afaa0cad9ed%7C1=VnOToRye%2Be6pu62p6Os1ohPVVa%2FzDEFh1%2F0vo%2Fi5ag4%3D=0
> 
> greg
> w9gb
> 
> Sent from iPad Air
> 
>> On Mar 28, 2017, at 12:18 PM, Larry McDavid  wrote:
>> 
>> What "OEM supplier?" Do you mean from Synergy Systems? Or, is there an 
>> enclosure supplier to Synergy?
>> 
>> Do you know if there is a schematic of the Synergy interface board available?
>> 
>> Larry W6FUB
>> 
>>> On 3/27/2017 9:31 AM, Gregory Beat wrote:
>>> The TAPR offering is a "partial kit" from the Synergy's SynPaQ/E product.
>>> Here is that data sheet:
>>> https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.s
>>> ynergy-gps.com%2Fimages%2Fstories%2Fpdf%2Fsynpaq%2520product%2520data
>>> %2520sheet%2520040110.pdf=01%7C01%7Cart%40synergy-gps.com%7C4dc2
>>> f4b8f72f4e2fc73108d47615ead3%7Cc81f9fdec0e04d8c95779afaa0cad9ed%7C1
>>> data=WF1IWYKvN5q6C0WMToPljgax2dpKhBqLxTAyhvKrYzw%3D=0
>>> Blank aluminum end-plates can be fabricated, or purchased from the OEM 
>>> supplier.
>>> 
>>> w9gb
>> --
>> Best wishes,
>> 
>> Larry McDavid W6FUB
>> Anaheim, California  (SE of Los Angeles, near Disneyland)
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Re: [time-nuts] THE Original Time Interval Counter

[Steve - Home]

I calibrated and repaired dozens of these beasts in the Air Force. A Fluke 
207-1 was our reference standard at the time. Still have a 207-1 on the shelf 
and the whip antenna in the attic!

Steve K. 



> On Jun 7, 2016, at 3:21 PM,   wrote:
> 
> Well, This is probably not the original but I remember using one "in the
> day"
> 
> Corby
> 
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Re: [time-nuts] What did I buy? Austron 1210D-03

[Steve - Home]

We used them as time transfer standards to sync the clocks at the Titan missile 
sites to the clock at the host base. The sequence was clock sync at the host 
base, travel to the site, sync the site clock, return to base and check timing 
error. If the error exceeded x, repeat until the error was x. They were also 
used to sync the secure comm circuits. 

Steve
WB0DBS



 On May 24, 2015, at 11:31 PM, Glen Hoag h...@hiwaay.net wrote:
 
 The manual describes it as a time transfer standard. It is equipped with NiCd 
 batteries to facilitate operation of the unit while in transit, as well as 
 the provision for external DC in. 
 
 Sent from my iPhone
 
 On May 24, 2015, at 16:35, Dan Watson watsondani...@gmail.com wrote:
 
 Hi,
 
 I just picked up an Austron 1210D-03 on eBay. It was an impulse purchase
 based on the apparent condition and the fact that it seems like a nice old
 clock/reference. I searched for old posts about this unit, found mostly
 discussion about the manual and battery pack. Hopefully the price I paid is
 ok.
 
 Can anyone tell me about these units?
 
 Also, there's one left:
 
 http://www.ebay.com/itm/AUSTRON-MODEL-1210D-03-CRYSTAL-CLOCK-/261899740547
 
 
 Thanks!
 
 Dan
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