Re: [time-nuts] Dual GPSDO - any advantage?

W1KSZ >> >> >> Sent from Outlook<http://aka.ms/weboutlook> >> >> From: time-nuts <time-nuts-boun...@febo.com> on behalf of Dr. David Kirkby >> <drkir...@kirkbymicrowave.co.uk> >> Sent: Tuesday, April 10, 2

Re: [time-nuts] Dual GPSDO - any advantage?

:35 PM (GMT-05:00) To: ewkehren via time-nuts <time-nuts@febo.com> Subject: Re: [time-nuts] Dual GPSDO - any advantage? Bert may I ask how you created the charts (what software are you using).Thank You     On Tuesday, April 10, 2018, 9:04:58 a.m. EDT, ewkehren via time-nuts <time-nuts@

Re: [time-nuts] Dual GPSDO - any advantage?

uts <time-nuts-boun...@febo.com> on behalf of Dr. David Kirkby > <drkir...@kirkbymicrowave.co.uk> > Sent: Tuesday, April 10, 2018 12:24:41 PM > To: Discussion of precise time and frequency measurement > Cc: gandal...@aol.com > Subject: Re: [time-nuts] Dual GPSDO - any advantage?

[time-nuts] Dual GPSDO - any advantage?

With regard to two GPSDOs, it is an interesting experiment. I have two Tbolts, both 2.2 firmware, both fed from the same antenna, both with factory default settings, and I see differences. They are about 2 feet apart on my bench and everything is pretty stable, +/- 20 nS or so until the heat kicks

Re: [time-nuts] Dual GPSDO - any advantage?

, 2018 12:24:41 PM To: Discussion of precise time and frequency measurement Cc: gandal...@aol.com Subject: Re: [time-nuts] Dual GPSDO - any advantage? On 10 April 2018 at 17:11, Clint Jay <cjaysh...@gmail.com> wrote: > Sad to say I think I was right, the listings have been pulled already and >

Re: [time-nuts] Dual GPSDO - any advantage?

Unless I copied the number incorrectly earlier it does seem likely that Ebay has pulled that auction. It may still be showing up to those who "bought" them but a straight search on that number returns nothing, either in completed or running listings, nor does it show up now in searches for

Re: [time-nuts] Dual GPSDO - any advantage?

ecise time and frequency measurement <time-nuts@febo.com> Subject: Re: [time-nuts] Dual GPSDO - any advantage? Most of the Chinese cheapo units have been frequency, not phase locked. It would be great if you could put the GPSDO outputs into a 2 Channel scope and eyeball them for a while to see if

Re: [time-nuts] Dual GPSDO - any advantage?

On 10 April 2018 at 16:56, donald collie wrote: > I have the Chinapost tracking numbers, so I don`t think it`s a scam - just > real good value. I hope you are right, but I doubt you are. It is not uncommon to be sent fake tracking numbers. I was 99% sure a Keithley

Re: [time-nuts] Dual GPSDO - any advantage?

On 10 April 2018 at 17:11, Clint Jay wrote: > Sad to say I think I was right, the listings have been pulled already and > the seller now has zero items for sale. > The listing has not been pulled. Yes the seller has 0 to sell, but because he has sold out of the 100. I still

Re: [time-nuts] Dual GPSDO - any advantage?

e-nuts@febo.com> Subject: Re: [time-nuts] Dual GPSDO - any advantage? Most of the Chinese cheapo units have been frequency, not phase locked. It would be great if you could put the GPSDO outputs into a 2 Channel scope and eyeball them for a while to see if they appear in phase (say plus-minus

Re: [time-nuts] Dual GPSDO - any advantage?

How did You Pay for them, I cannot make a payment On Tuesday, April 10, 2018, 2:01:41 p.m. EDT, W7SLS - Scott Scheirman wrote: I ordered 2.  We shall see Scott No connection with seller(s) Sent from my iPhone > On Apr 10, 2018, at 7:13 AM, gandalfg8---

Re: [time-nuts] Dual GPSDO - any advantage?

Hi Looks like 100 is all he had (or all he put up on this auction). It will be interesting to see what (if anything) we all get ….. Bob > On Apr 10, 2018, at 12:44 PM, W7SLS - Scott Scheirman > wrote: > > I ordered 2. We shall see > Scott > No connection with

Re: [time-nuts] Dual GPSDO - any advantage?

I ordered 2. We shall see Scott No connection with seller(s) Sent from my iPhone > On Apr 10, 2018, at 7:13 AM, gandalfg8--- via time-nuts > wrote: > > > > > Is this auction # 273145006434, actually showing at $9.77 here in the UK, and > from a recently registered

Re: [time-nuts] Dual GPSDO - any advantage?

On 10 April 2018 at 16:23, Dr. David Kirkby wrote: > On 10 April 2018 at 15:32, Clint Jay wrote: > >> Ahh, I've found the listing, has anyone received one? >> >> I hate to say this but I'm highly sceptical that they will ever turn up, >>

Re: [time-nuts] Dual GPSDO - any advantage?

Sad to say I think I was right, the listings have been pulled already and the seller now has zero items for sale. Get those paypal refund cases logged. On 10 April 2018 at 15:13, gandalfg8--- via time-nuts wrote: > > > > Is this auction # 273145006434, actually showing at

Re: [time-nuts] Dual GPSDO - any advantage?

I have the Chinapost tracking numbers, so I don`t think it`s a scam - just real good value. I have the eBay guarantee, anyway. I`m just looking for a superior frequency standard at the moment, but the timenut bug might bight. How could I take the average of two [now three]. A man with three

Re: [time-nuts] Dual GPSDO - any advantage?

ts-boun...@febo.com> on behalf of gandalfg8--- via time-nuts <time-nuts@febo.com> Sent: Tuesday, April 10, 2018 7:13:28 AM To: time-nuts@febo.com Subject: [time-nuts] Dual GPSDO - any advantage? Is this auction # 273145006434, actually showing at $9.77 here in the UK, and from a re

Re: [time-nuts] Dual GPSDO - any advantage?

rement <time-nuts@febo.com> Subject: Re: [time-nuts] Dual GPSDO - any advantage? Ahh, I've found the listing, has anyone received one? I hate to say this but I'm highly sceptical that they will ever turn up, looks and smells very much like the standard eBay scam to me. On 10 April 2018 a

Re: [time-nuts] Dual GPSDO - any advantage?

On 10 April 2018 at 15:32, Clint Jay wrote: > Ahh, I've found the listing, has anyone received one? > > I hate to say this but I'm highly sceptical that they will ever turn up, > looks and smells very much like the standard eBay scam to me. > -- > Clint. M0UAW IO83 > I'm

Re: [time-nuts] Dual GPSDO - any advantage?

Hi I certainly would not pay with anything other than PayPal. There is a very real risk ….. Bob > On Apr 10, 2018, at 10:32 AM, Clint Jay wrote: > > Ahh, I've found the listing, has anyone received one? > > I hate to say this but I'm highly sceptical that they will ever

Re: [time-nuts] Dual GPSDO - any advantage?

Ahh, I've found the listing, has anyone received one? I hate to say this but I'm highly sceptical that they will ever turn up, looks and smells very much like the standard eBay scam to me. On 10 April 2018 at 14:52, Bob kb8tq wrote: > Hi > > Simple answer is that the

[time-nuts] Dual GPSDO - any advantage?

Is this auction # 273145006434, actually showing at $9.77 here in the UK, and from a recently registered zero rated seller? If so, and given that the auction text, and perhaps the photos too, seem to be taken from one or more of Bob Mokia's auctions dating back a couple of years or so, and

Re: [time-nuts] Dual GPSDO - any advantage?

Hi Simple answer is that the “simple” approaches don’t do much to improve things. Errors are indeed un-correlated, even off of the same antenna. You *could* average the result off of the two. That might improve things by sqrt(2). My experience is that the bumps and lumps (when they do occur)

Re: [time-nuts] Dual GPSDO - any advantage?

ct: Re: [time-nuts] Dual GPSDO - any advantage? Am Tue, 10 Apr 2018 17:43:25 +1200 schrieb donald collie <donaldbcol...@gmail.com>: > I`ve just bought two GPSDO`s from China @ US$9-50 each [This is not an > error!] They are stated as being new, and use a Trimball dual oven >

Re: [time-nuts] Dual GPSDO - any advantage?

; Date: 4/10/18 6:46 AM (GMT-05:00) To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: Re: [time-nuts] Dual GPSDO - any advantage? Most of the Chinese cheapo units have been frequency, not phase locked. It would be great if you could put the GPSDO outp

Re: [time-nuts] Dual GPSDO - any advantage?

e Sent: Tuesday, April 10, 2018 1:43 AM To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: [time-nuts] Dual GPSDO - any advantage? I`ve just bought two GPSDO`s from China @ US$9-50 each [This is not an error!] They are stated as being new, and use a Trimba

Re: [time-nuts] Dual GPSDO - any advantage?

Am Tue, 10 Apr 2018 17:43:25 +1200 schrieb donald collie : > I`ve just bought two GPSDO`s from China @ US$9-50 each [This is not an > error!] They are stated as being new, and use a Trimball dual oven > OCXO. I plan to run these in parallel [2 antennas, 2 feedlines, and 2

Re: [time-nuts] Dual GPSDO - any advantage?

Most of the Chinese cheapo units have been frequency, not phase locked. It would be great if you could put the GPSDO outputs into a 2 Channel scope and eyeball them for a while to see if they appear in phase (say plus-minus 20ns) over a few hours. Tim N3QE > On Apr 10, 2018, at 1:43 AM,

Re: [time-nuts] Dual GPSDO - any advantage?

Date: 4/10/18 1:43 AM (GMT-05:00) To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: [time-nuts] Dual GPSDO - any advantage? I`ve just bought two GPSDO`s from China @ US$9-50 each [This is not an error!] They are stated as being new, and use a Trimba

[time-nuts] Dual GPSDO - any advantage?

I`ve just bought two GPSDO`s from China @ US$9-50 each [This is not an error!] They are stated as being new, and use a Trimball dual oven OCXO. I plan to run these in parallel [2 antennas, 2 feedlines, and 2 GPSDO`s] It`s been said that a man with two watches is never happy - unless, of course,