I don't recognize the size you are asking for.  What is your
application?

-Chuck Harris

David C. Partridge wrote:

Panasonic VIC-100 GPS antenna ...

Dave

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Chuck Harris
Sent: 07 July 2009 13:07
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 1" 14 tpi UNS die

I don't recognize the size you are asking for.  What is your application?

-Chuck Harris

David C. Partridge wrote:

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.

Ok, I will try this from a different angle.

1" - 14TPI UNS thread like you described are very rare outside
of the large machine industry.  They are used for things
like bolts on tractors.  I have a pretty big doubt that it
has any application in a GPS antenna.

US pipe thread in the sizes 1/2", 3/4", and 1" are 14TPI, they
are not "1.0 inch" in any dimension, however.

It is pretty common to use standard pipe fittings in antenna
work.

So how did you arrive at needing a 1"-14TPI UNS die?

-Chuck Harris

David C. Partridge wrote:

Hi Dave,

Check with your local "plumbing"-store. In Sweden the "old inch based pipe
thread" lives on, slightly renamed. Se attached .jpg for approximate
inside/outside diameters.

The pipes are sold in 6m lenghts threaded in both ends.

Good luck in your search!

--
Björn

http://pewa.panasonic.com/emp/products/gps_pdf/vic100.pdf is where I got
the specification for the thread from.

Pipe has O.D. of 1".

Dave

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Chuck Harris
Sent: 07 July 2009 13:57
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 1" 14 tpi UNS die

Ok, I will try this from a different angle.

1" - 14TPI UNS thread like you described are very rare outside of the large
machine industry.  They are used for things like bolts on tractors.  I have
a pretty big doubt that it has any application in a GPS antenna.

US pipe thread in the sizes 1/2", 3/4", and 1" are 14TPI, they are not "1.0
inch" in any dimension, however.

It is pretty common to use standard pipe fittings in antenna work.

So how did you arrive at needing a 1"-14TPI UNS die?

-Chuck Harris

David C. Partridge wrote:

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.

This is the standard Marine antenna mount I believe.

Dave

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of David C. Partridge
Sent: 07 July 2009 14:47
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 1" 14 tpi UNS die

http://pewa.panasonic.com/emp/products/gps_pdf/vic100.pdf is where I got
the specification for the thread from.

Pipe has O.D. of 1".

Dave

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Chuck Harris
Sent: 07 July 2009 13:57
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 1" 14 tpi UNS die

Ok, I will try this from a different angle.

1" - 14TPI UNS thread like you described are very rare outside of the large
machine industry.  They are used for things like bolts on tractors.  I have
a pretty big doubt that it has any application in a GPS antenna.

US pipe thread in the sizes 1/2", 3/4", and 1" are 14TPI, they are not "1.0
inch" in any dimension, however.

It is pretty common to use standard pipe fittings in antenna work.

So how did you arrive at needing a 1"-14TPI UNS die?

-Chuck Harris

David C. Partridge wrote:

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.

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.

I think it is also known as 3/4" NPT for a pipe with a nominal OD of 1.05"

Dave

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of David C. Partridge
Sent: 07 July 2009 14:54
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 1" 14 tpi UNS die

This is the standard Marine antenna mount I believe.

Dave

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of David C. Partridge
Sent: 07 July 2009 14:47
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 1" 14 tpi UNS die

http://pewa.panasonic.com/emp/products/gps_pdf/vic100.pdf is where I got
the specification for the thread from.

Pipe has O.D. of 1".

Dave

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Chuck Harris
Sent: 07 July 2009 13:57
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 1" 14 tpi UNS die

Ok, I will try this from a different angle.

1" - 14TPI UNS thread like you described are very rare outside of the large
machine industry.  They are used for things like bolts on tractors.  I have
a pretty big doubt that it has any application in a GPS antenna.

US pipe thread in the sizes 1/2", 3/4", and 1" are 14TPI, they are not "1.0
inch" in any dimension, however.

It is pretty common to use standard pipe fittings in antenna work.

So how did you arrive at needing a 1"-14TPI UNS die?

-Chuck Harris

David C. Partridge wrote:

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.

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.

time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
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and follow the instructions there.

Hi Dave,

That would 3/4 inch NPT (National Pipe Thread).  In the UK it is known
as "Gas Pipe".  As far as I can tell, it is standard the world over.

There are some differences, that won't matter in your application.  In
Europe, NPT is frequently not tapered.  This is apparently the result of
not understanding that tapered pipe thread is self sealing.  As a result,
there have been all sorts of o-ring jamb nuts and other insane stuff done
"over there" to try and form a temporary seal... but I digress.

-Chuck Harris

David C. Partridge wrote:

Chuck,

In France, Gas Pipe threads are tappered. However, I do not remember if they
follow the Metric or British standard for size...

Didier

That is known over here as BSP (British Standard Pipe), or more pickily,
BSPP (last P=Parallel) aka British Gas), there is also BSPT (T= Taper).

I tried a BSP parallel 3/4" (also used for plumbing over here) but it
doesn't (quite) fit.

Dave

-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Chuck Harris
Sent: 07 July 2009 15:33
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 1" 14 tpi UNS die

Hi Dave,

That would 3/4 inch NPT (National Pipe Thread).  In the UK it is known as
"Gas Pipe".  As far as I can tell, it is standard the world over.

There are some differences, that won't matter in your application.  In
Europe, NPT is frequently not tapered.  This is apparently the result of not
understanding that tapered pipe thread is self sealing.  As a result, there
have been all sorts of o-ring jamb nuts and other insane stuff done "over
there" to try and form a temporary seal... but I digress.

-Chuck Harris

David C. Partridge wrote:

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.

I think Rigid Metal Electrical Conduit (RMC)  uses similar threads to NPT,
but are not tapered. I mean the thick stuff, not EMT.

-John

==========

Hi Didier,

Gas pipe, as far as I know is always tapered.

In Norway, Sweden, Denmark, Italy, etc... They use "gas pipe"
for hot water heating systems... only they use straight threads,
with a jamb nut to squash an O-ring up against the fixture.
The nut has a bevel that presses the O-ring into the pipe's threads,
and affects a semi-seal.  It is a one time affair, and in my
experience lasts about two heating seasons before it starts
dripping.  I guess a benefit is it keeps the room humidity up in the
winter... sigh!

-Chuck Harris

Didier Juges wrote:

Hi Chuck,

Been living in Sweden my whole life. And almost exclusivly in houses
heated by circulating hot water through radiators. I have yet to spot an
O-ring.

Where in Sweden did you see this strange system?

--

Björn

I have the same problem with several GPS antennas, a Quadrifilar from Raytheon,
Irvine 2640NW with mounting base, HP 58532A with mounting base,
HP 58504Ac. etc. Some complete boxes from HP do contain an adapter.
So this thread is definitively a kind of standard. The thread is fully
cylindrical, all the plumbers tubes do use conical threads which are not
compatible. Very difficult to find proper solution in the metrical Europe.
If I would find a source of that HP-adapters I would buy 4 units.
I did not check for the correct naming of this thread though.

regards
Arnold

On Tue, 7 Jul 2009 15:23:42 +0100, David C. Partridge wrote:

I have to fill the Trimble Bullet III into the list of antennas with this thread.
Here are some mounting adapters shown:
http://www.dpie.com/gps/bullet3.html

Arnold

On Tue, 7 Jul 2009 15:23:42 +0100, David C. Partridge wrote:

bg@lysator.liu.se wrote:

Hi Bjorn,

In the US, hydronic heat comes in a couple of flavors:  The old fashioned
cast iron radiators, fin/coil baseboard radiators, radiant baseboard, or
steel radiators/towel warmers imported from the Europe.

Most of the European systems are geared towards PEX tubing, and compression
fittings... and untapered pipe thread with jamb nuts and O-rings.

The US cast iron radiators all use tapered pipe thread, fin coil is almost always
soldered copper, and the steel radiators from Sweden/Denmark/Norway/Switzerland,
and Italy, all have straight pipe thread, and use a Jamb nut with an O-ring.

Runtal, Cordivari, Wirsbro and Wesaunard are examples I have run into.

I have also run into this system in shut-off valves, manifolds, flow
control valves, air eliminators, ... all coming from Europe.

Do you install and repair systems?  Or just live with them?

-Chuck Harris

Your description does not enlighten me... there are all sorts of radiators
available here.

PEX tubing has been "certified", but Prisol tubing (ie soft bendable Cu
with plastic "coating") is much more common here. Cu tube joints are made
with "nut", "support cylinder" and a "squeeze ring".

It is actually Wirsbo... ;-) The others are unknown to me.

I do minor changes to the house system. And I have accumulated more than
enough radiator heating seasons to know your "two seasons to leak" quality
must be a US craftmanship problem.

--

Björn

Hi Bjorn,

Nope!  I'm the US craftsman using European plumbing parts, as instructed by
the manufacturers.

But I'm puzzled!  First you tell me you have never seen an O-ring with a jamb
nut in a heating system, and then you tell me that your system, presumably
without any such O-ring seals, doesn't leak???

-Chuck Harris

time-nuts-bounces@febo.com wrote on 07/07/2009 05:38:52 PM:

an

fashioned

or

made

The relevant US pipe-thread standards are quite clear - straight threads
are for mechanical connections only.  For connections that must also
contain fluids under pressure, one uses taper threads such as the
ubiquitous NPT.  Over the decades, I have lived in many houses, including
my current house, with circulating hot water heat and cast iron radiators,
and I have never had to redo a radiator connection.  I've never had a
leak, and most of these systems were old when I bought the house.

If you have straight pipe threads going into radiators, there is an
installer who should be made to re-do the job.  Maybe he was an
out-of-work electrician, and used rigid electrical conduit for pipe.

Straight threads and O rings are seen only in hydraulic systems, not
domestic water or heating systems, and the mating parts have correctly
designed pockets to hold the O-rings.  And they do not use jam nuts.  One
screws them together until they bottom.

Joe Gwinn