[time-nuts] PVC caps for RF connectors.

2013-10-16 Thread Dr. David Kirkby
Some time back I needed to purchase some caps to cover RF connectors.
Despite only wanting a couple of hundred of each, I was unable to get
small quantities, so had to buy either 2500 or 5000 of each, so I have
a few to spare. If anyone wants to cover their plugs and sockets to
stop dirt and damage, they might interest you.

They come from Caplugs. The data on them is available from here.

http://www.caplugs.co.uk/vinyl_round_caps.asp?pg=seriesseries=174

The types I bought are:

VC-812-8 (Suites male N plugs, Male PL259, NMD connectors and APC7)
VC-625-8 (Suites female N, female S0239)
VC-343-8 (Suites male SMA, female BNC)

If anyone wants any, I'm selling them in multiples of 50. I've put
price in GBP (my own currency) but also USD. I've used an exchange
rate of 1 GBP = $1.70 USD. It will probably be cheaper for someone to
buy them in GBP, not USD, but the USD option is there. It depends on
the rate Paypal give you. They give me a pretty poor rate converting
from USD balance to my UK bank account.

COST OF CAPS
Small - for male SMA and female BNC - £6 ($10.20) for 50 caps
Medium - for female N, female S0239,  - £8 ($13.60) for 50 caps.
Large - for male N, male PL259, APC7 and NMD - £8 ($13.60) for 50 caps

COST OF UK SHIPPING
UK shipping is fixed at £4.20, irrespective of the number sent.

COST OF INTERNATIONAL SHIPPING.
International shipping rates depend on the size and number of caps, as
the cost obviously rises with weight, and unlike the UK, the cost is
significant due to the need for me to get them tracked internationally.

£10.50 ($17.85) shipping for 50 of the smallest size (50 for male SMA)
£13 ($22.1) shipping for 50 of either of the larger two sizes (50 for
either male N or female N)
£14 ($23.80) shipping for 50 of each size (150 caps in total).
£20 ($34) shipping for 100 of each sizes (300 caps in total)

[See below how to reduce the international shipping prices]

So some typical total prices, based on 50 or 100 of each, which most
people seem to want, are:

* 50 of each size (150 caps) shipped to the UK is £26.20
* 50 of each size (150 caps), shipped outside the UK is £36.00 (GBP)
or $61.20 USD

* 100 of each size (300 caps), shipped to the UK is £48.20
* 100 of each size (300 caps), shipped outside the UK is £64 (GBP) or
$108.8 (USD)

If someone wants to send money as Friend and family, rather than
Goods, which means you lose all Paypal buyer-protection, I don't mind
knocking £6 off the international carriage cost, and I'll send them
with no tracking, at 100% your risk. I'll get proof of posting, but
that is all. Unfortunately on a low value item, the shipping cost is
more than the item, but I can't do much about that.

Paypal to drkir...@gmail.com if you want any.

Dave, G8WRB.
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Re: [time-nuts] PVC caps for RF connectors.

2013-10-16 Thread Dr. David Kirkby
I forgot to add. There are some pictures on eBay of these, but I'm
selling them cheaper off of eBay, but you can see the pictures with
the various connectors. (No PL259 or S0239 shown, but they do fit. I
had to hunt hard to find such connectors here)

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItemitem=171143220503

Dave
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[time-nuts] HP 4193A 4815A probe compatibility?

2013-10-16 Thread Tom Knox
I hope this is not to far off topic. Does any one know if the 4193A and 4815A 
probe are physically interchangeable and electronically compatible? If not does 
anyone know the differences and how to identify which is which? If you feel 
this is to far off topic please contact me directly. Thanks very much.

Thomas Knox


  
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Re: [time-nuts] HP 4193A 4815A probe compatibility?

2013-10-16 Thread Richard Karlquist

The 4815A used P channel FETs which were available 50 years ago
and are now unobtainium.

The 4193A used N channel FETs which were available 10 to 30 years
ago and may even be currently available.

They are DEFINITELY NOT INTERCHANGEABLE.

This is according to ex-HP'er George Standford, who used to
support vector impedance meters with HP's blessing.  He held
the worlds remaining supply of P channel FETs for fixing probes.
He was in New Jersey, but my contact info for him is no longer
valid.

I don't know how to identify them, but in principle an ohmmeter might
be able to identify the polarity of the FETs.

While we are on the topic, it turns out that the market is such
that a 4193A with probe might sell for $5000, but if you break
up the set, the probe is worth $4999 and the instrument is worth
$1.  Well, maybe I exaggerated that a little, but not much :-)
I actually know someone who paid $5000 for just a 4193 probe.
He made the mistake of purchasing an instrument without a probe,
and paid way too much.

It is also worth noting that now you can buy a very nice vector
impedance meter from Tomco in Austrailia for only $3000 new.
I A/B'ed one of these with an HP one, and I will have to admit
that the Tomco is the real deal, not a cheap knockoff.

Rick Karlquist N6RK


On 2013-10-16 09:15, Tom Knox wrote:

I hope this is not to far off topic. Does any one know if the 4193A
and 4815A probe are physically interchangeable and electronically
compatible? If not does anyone know the differences and how to
identify which is which? If you feel this is to far off topic please
contact me directly. Thanks very much.

Thomas Knox



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Re: [time-nuts] HP 4193A 4815A probe compatibility?

2013-10-16 Thread SAIDJACK
Hi Rick, Tom,
 
one little bit of knowledge I learned: I like the HP 54701A FET probes for  
frequency-domain stuff.
 
Available for $300 on Ebay sometimes. I built a small power supply for  one 
of mine, and use it as a probe for my Spectrum analyzer and scopes. Almost  
indestructable.
 
It works really well up to about 3GHz and beyond, especially for relative  
measurements.
 
The only disadvantage is that it has 100K resistance to ground which may  
affect sensitive capacitive circuits, and that it has 20dB attenuation.
 
Otherwise it works really well for Spectrum analyzer and Network analyzer  
applications.
 
bye,
Said
 
 
In a message dated 10/16/2013 11:33:11 Pacific Daylight Time,  
rich...@karlquist.com writes:

The  4815A used P channel FETs which were available 50 years ago
and are now  unobtainium.

The 4193A used N channel FETs which were available 10 to  30 years
ago and may even be currently available.

They are  DEFINITELY NOT INTERCHANGEABLE.

This is according to ex-HP'er George  Standford, who used to
support vector impedance meters with HP's  blessing.  He held
the worlds remaining supply of P channel FETs for  fixing probes.
He was in New Jersey, but my contact info for him is no  longer
valid.

I don't know how to identify them, but in principle an  ohmmeter might
be able to identify the polarity of the FETs.

While  we are on the topic, it turns out that the market is such
that a 4193A with  probe might sell for $5000, but if you break
up the set, the probe is worth  $4999 and the instrument is worth
$1.  Well, maybe I exaggerated that  a little, but not much :-)
I actually know someone who paid $5000 for just  a 4193 probe.
He made the mistake of purchasing an instrument without a  probe,
and paid way too much.

It is also worth noting that now you  can buy a very nice vector
impedance meter from Tomco in Austrailia for  only $3000 new.
I A/B'ed one of these with an HP one, and I will have to  admit
that the Tomco is the real deal, not a cheap knockoff.

Rick  Karlquist N6RK


On 2013-10-16 09:15, Tom Knox wrote:
 I hope  this is not to far off topic. Does any one know if the 4193A
 and 4815A  probe are physically interchangeable and electronically
 compatible? If  not does anyone know the differences and how to
 identify which is  which? If you feel this is to far off topic please
 contact me  directly. Thanks very much.
 
 Thomas Knox
 
  

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Re: [time-nuts] HP 4193A 4815A probe compatibility?

2013-10-16 Thread Tom Knox
Thanks Rick; There is so much conflicting information I do not know what to 
believe anymore. George sounds like the person to talk to. It sounds like an 
aftermarket probe would be a great way for someone to make a few extra dollars. 
I like the Tomco option, it looks like a nice instrument. Thanks Again.
Thomas Knox



 Date: Wed, 16 Oct 2013 11:16:27 -0700
 From: rich...@karlquist.com
 To: time-nuts@febo.com
 Subject: Re: [time-nuts] HP 4193A 4815A probe compatibility?
 
 The 4815A used P channel FETs which were available 50 years ago
 and are now unobtainium.
 
 The 4193A used N channel FETs which were available 10 to 30 years
 ago and may even be currently available.
 
 They are DEFINITELY NOT INTERCHANGEABLE.
 
 This is according to ex-HP'er George Standford, who used to
 support vector impedance meters with HP's blessing.  He held
 the worlds remaining supply of P channel FETs for fixing probes.
 He was in New Jersey, but my contact info for him is no longer
 valid.
 
 I don't know how to identify them, but in principle an ohmmeter might
 be able to identify the polarity of the FETs.
 
 While we are on the topic, it turns out that the market is such
 that a 4193A with probe might sell for $5000, but if you break
 up the set, the probe is worth $4999 and the instrument is worth
 $1.  Well, maybe I exaggerated that a little, but not much :-)
 I actually know someone who paid $5000 for just a 4193 probe.
 He made the mistake of purchasing an instrument without a probe,
 and paid way too much.
 
 It is also worth noting that now you can buy a very nice vector
 impedance meter from Tomco in Austrailia for only $3000 new.
 I A/B'ed one of these with an HP one, and I will have to admit
 that the Tomco is the real deal, not a cheap knockoff.
 
 Rick Karlquist N6RK
 
 
 On 2013-10-16 09:15, Tom Knox wrote:
  I hope this is not to far off topic. Does any one know if the 4193A
  and 4815A probe are physically interchangeable and electronically
  compatible? If not does anyone know the differences and how to
  identify which is which? If you feel this is to far off topic please
  contact me directly. Thanks very much.
  
  Thomas Knox
  
  
  
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 -- 
 
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Re: [time-nuts] HP 4193A 4815A probe compatibility?

2013-10-16 Thread Tom Knox
I agree the 54701A is really a great product. Great point on attenuation, I 
always forget the 10x attn value changes when not being used on a O-Scope as a 
voltage probe.
Thanks;
Thomas Knox



 From: saidj...@aol.com
 Date: Wed, 16 Oct 2013 15:22:13 -0400
 To: time-nuts@febo.com
 Subject: Re: [time-nuts] HP 4193A 4815A probe compatibility?
 
 Hi Rick, Tom,
  
 one little bit of knowledge I learned: I like the HP 54701A FET probes for  
 frequency-domain stuff.
  
 Available for $300 on Ebay sometimes. I built a small power supply for  one 
 of mine, and use it as a probe for my Spectrum analyzer and scopes. Almost  
 indestructable.
  
 It works really well up to about 3GHz and beyond, especially for relative  
 measurements.
  
 The only disadvantage is that it has 100K resistance to ground which may  
 affect sensitive capacitive circuits, and that it has 20dB attenuation.
  
 Otherwise it works really well for Spectrum analyzer and Network analyzer  
 applications.
  
 bye,
 Said
  
  
 In a message dated 10/16/2013 11:33:11 Pacific Daylight Time,  
 rich...@karlquist.com writes:
 
 The  4815A used P channel FETs which were available 50 years ago
 and are now  unobtainium.
 
 The 4193A used N channel FETs which were available 10 to  30 years
 ago and may even be currently available.
 
 They are  DEFINITELY NOT INTERCHANGEABLE.
 
 This is according to ex-HP'er George  Standford, who used to
 support vector impedance meters with HP's  blessing.  He held
 the worlds remaining supply of P channel FETs for  fixing probes.
 He was in New Jersey, but my contact info for him is no  longer
 valid.
 
 I don't know how to identify them, but in principle an  ohmmeter might
 be able to identify the polarity of the FETs.
 
 While  we are on the topic, it turns out that the market is such
 that a 4193A with  probe might sell for $5000, but if you break
 up the set, the probe is worth  $4999 and the instrument is worth
 $1.  Well, maybe I exaggerated that  a little, but not much :-)
 I actually know someone who paid $5000 for just  a 4193 probe.
 He made the mistake of purchasing an instrument without a  probe,
 and paid way too much.
 
 It is also worth noting that now you  can buy a very nice vector
 impedance meter from Tomco in Austrailia for  only $3000 new.
 I A/B'ed one of these with an HP one, and I will have to  admit
 that the Tomco is the real deal, not a cheap knockoff.
 
 Rick  Karlquist N6RK
 
 
 On 2013-10-16 09:15, Tom Knox wrote:
  I hope  this is not to far off topic. Does any one know if the 4193A
  and 4815A  probe are physically interchangeable and electronically
  compatible? If  not does anyone know the differences and how to
  identify which is  which? If you feel this is to far off topic please
  contact me  directly. Thanks very much.
  
  Thomas Knox
  
   
 
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[time-nuts] NTP REFCLOCK for a Jackson Fury??

2013-10-16 Thread Frank Hughes
Hi,

What NTP REFCLOCK can be used for a Jackson Fury?

I know that the Jackson Fury docs suggest using:
http://www.realhamradio.com/gpscon-info.htm

But that means I would have to put up a windows server
to replace the FreeBSD ntpd server I built for use w/ the Trimble TB.

Looking for open source options, if possible.

Thanks,
Frank
KJ4OLL
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Re: [time-nuts] NTP REFCLOCK for a Jackson Fury??

2013-10-16 Thread SAIDJACK
Frank,
 
try GPSD on Linux:
 
   http://gpsd.berlios.de/hardware.html
 
Bye,
Said
 
 
In a message dated 10/16/2013 14:50:19 Pacific Daylight Time,  
hp_cisco...@yahoo.com writes:

Hi,

What NTP REFCLOCK can be used for a Jackson  Fury?

I know that the Jackson Fury docs suggest  using:
http://www.realhamradio.com/gpscon-info.htm

But that means I  would have to put up a windows server
to replace the FreeBSD ntpd server I  built for use w/ the Trimble TB.

Looking for open source options, if  possible.

Thanks,
Frank
KJ4OLL
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Re: [time-nuts] NTP REFCLOCK for a Jackson Fury??

2013-10-16 Thread Bill Dailey
You can use FreeBSD.  I will dig out the refclock I am using with my 
disciplined soekris.

Sent from mobile

 On Oct 16, 2013, at 4:44 PM, Frank Hughes hp_cisco...@yahoo.com wrote:
 
 Hi,
 
 What NTP REFCLOCK can be used for a Jackson Fury?
 
 I know that the Jackson Fury docs suggest using:
 http://www.realhamradio.com/gpscon-info.htm
 
 But that means I would have to put up a windows server
 to replace the FreeBSD ntpd server I built for use w/ the Trimble TB.
 
 Looking for open source options, if possible.
 
 Thanks,
 Frank
 KJ4OLL
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Re: [time-nuts] NTP REFCLOCK for a Jackson Fury??

2013-10-16 Thread Paul
On Wed, Oct 16, 2013 at 5:44 PM, Frank Hughes hp_cisco...@yahoo.com wrote:
 What NTP REFCLOCK can be used for a Jackson Fury?

One normally uses the ATOM driver with PPS.  If you need to number
your seconds I've heard of a SCPI (hpgps) driver but I suggest using
another one of your clocks or any other clock if you have confidence
in your network connection.
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Re: [time-nuts] NTP REFCLOCK for a Jackson Fury??

2013-10-16 Thread Paul
On Wed, Oct 16, 2013 at 6:38 PM, Paul tic-...@bodosom.net wrote:
 a SCPI (hpgps) driver

Sorry, hpgps is the driver/port name but the NTP driver id is GPS_HP.
Again, I have no direct experience with it.

--
Paul
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Re: [time-nuts] NTP REFCLOCK for a Jackson Fury??

2013-10-16 Thread Tim Shoppa
With my Z3801A (which I understand the Fury to be compatible with at SCPI
level), I use GPS_HP refclock in ntpd, along with nanokernel PPS. I had to
tweak baud rate in the source code.

Tim N3QE


On Wed, Oct 16, 2013 at 6:44 PM, Paul tic-...@bodosom.net wrote:

 On Wed, Oct 16, 2013 at 6:38 PM, Paul tic-...@bodosom.net wrote:
  a SCPI (hpgps) driver

 Sorry, hpgps is the driver/port name but the NTP driver id is GPS_HP.
 Again, I have no direct experience with it.

 --
 Paul
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Re: [time-nuts] NTP REFCLOCK for a Jackson Fury??

2013-10-16 Thread Bill Dailey
I think I used type 20 and 22 with bsd on my soekris.  I have had it off for 
some time because it started to error on boot.  Have it apart now trying to 
figure out what is going on.  I suspect a problem with the clock block.

Set the fury to output ggtts.

Bill

Sent from my iPad

 On Oct 16, 2013, at 4:44 PM, Frank Hughes hp_cisco...@yahoo.com wrote:
 
 Hi,
 
 What NTP REFCLOCK can be used for a Jackson Fury?
 
 I know that the Jackson Fury docs suggest using:
 http://www.realhamradio.com/gpscon-info.htm
 
 But that means I would have to put up a windows server
 to replace the FreeBSD ntpd server I built for use w/ the Trimble TB.
 
 Looking for open source options, if possible.
 
 Thanks,
 Frank
 KJ4OLL
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Re: [time-nuts] NTP REFCLOCK for a Jackson Fury??

2013-10-16 Thread Paul
On Wed, Oct 16, 2013 at 7:18 PM, Bill Dailey docdai...@gmail.com wrote:

 Set the fury to output ggtts


Did you mean GPGGA?

If the Fury is producing RMC sentences then NMEA+PPS (20+22) should work.
Some folks recommend the NMEA PPS option (flag1) but in my experience it's
less stable than the stand-alone PPS driver.
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Re: [time-nuts] NTP REFCLOCK for a Jackson Fury??

2013-10-16 Thread Bill Dailey
Yes

Sent from mobile

 On Oct 16, 2013, at 8:39 PM, Paul tic-...@bodosom.net wrote:
 
 On Wed, Oct 16, 2013 at 7:18 PM, Bill Dailey docdai...@gmail.com wrote:
 
 Set the fury to output ggtts
 
 
 Did you mean GPGGA?
 
 If the Fury is producing RMC sentences then NMEA+PPS (20+22) should work.
 Some folks recommend the NMEA PPS option (flag1) but in my experience it's
 less stable than the stand-alone PPS driver.
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[time-nuts] Coax cable for volute antenna

2013-10-16 Thread quartz55
I've been searching for the small copper hardline I can use for the feed on the 
gps volute (egg beater) antenna.  Can anyone steer me where to get a foot or so 
of the small 50 ohm line so I can make a few antennas?  I've been searching 
mouser to no avail.

Dave
N3DT
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Re: [time-nuts] Coax cable for volute antenna

2013-10-16 Thread Jim Lux

On 10/16/13 8:26 PM, quartz55 wrote:

I've been searching for the small copper hardline I can use for the feed on the 
gps volute (egg beater) antenna.  Can anyone steer me where to get a foot or so 
of the small 50 ohm line so I can make a few antennas?  I've been searching 
mouser to no avail.



what size (0.141, 0.085, 0.047 OD)?


You probably won't find it at Mouser type places.  RF Coax, Pasternak, 
etc. are better bets. Uniform Tubes might send you a sample.


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Re: [time-nuts] Coax cable for volute antenna

2013-10-16 Thread John Allen
0.250 is another size UT makes.

Might try ebay.

John Allen 
mailto:j...@pcsupportsolutions.com M: 508 361-6229
 


-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Jim Lux
Sent: Thursday, October 17, 2013 12:31 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Coax cable for volute antenna

On 10/16/13 8:26 PM, quartz55 wrote:
 I've been searching for the small copper hardline I can use for the feed on
the gps volute (egg beater) antenna.  Can anyone steer me where to get a foot or
so of the small 50 ohm line so I can make a few antennas?  I've been searching
mouser to no avail.


what size (0.141, 0.085, 0.047 OD)?


You probably won't find it at Mouser type places.  RF Coax, Pasternak, 
etc. are better bets. Uniform Tubes might send you a sample.

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Re: [time-nuts] Coax cable for volute antenna

2013-10-16 Thread Graham / KE9H

Go to eBay and search for semi rigid coax

If you know the RG designation for the specific size you are looking for,
search for that.

Mouser and Digikey don't carry.  And the people that do will have minimum
buys you are unlikely to be able to afford.

Look for listings by eBay id: de_w7eme
Or contact Jeremy directly (W7EME) and see if he can help you out.

--- Graham / KE9H

==


On 10/16/2013 11:30 PM, Jim Lux wrote:

On 10/16/13 8:26 PM, quartz55 wrote:
I've been searching for the small copper hardline I can use for the 
feed on the gps volute (egg beater) antenna.  Can anyone steer me 
where to get a foot or so of the small 50 ohm line so I can make a 
few antennas?  I've been searching mouser to no avail.




what size (0.141, 0.085, 0.047 OD)?


You probably won't find it at Mouser type places.  RF Coax, Pasternak, 
etc. are better bets. Uniform Tubes might send you a sample.



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Re: [time-nuts] Coax cable for volute antenna

2013-10-16 Thread Rex
I wish you had learned to post a new message, rather than replying to a 
previous message with an unrelated new subject.

(screws up threading displays in mail readers)


On 10/16/2013 8:26 PM, quartz55 wrote:

I've been searching for the small copper hardline I can use for the feed on the 
gps volute (egg beater) antenna.  Can anyone steer me where to get a foot or so 
of the small 50 ohm line so I can make a few antennas?  I've been searching 
mouser to no avail.

Dave
N3DT
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