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: >> is where I >> got >> the specification for the thread from. >> >> Pipe has O.D. of 1". >> >> Dave > > _______________________________________________ > 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. > >

r 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

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. --------------- As commented previously, this is a common fitting and fairly standard for GPS antennas and some other antenna kit, especially in a marine environment. A variety of adaptors is available from marine suppliers ranging from expensive stainless steel fittings to much cheaper plastic, they are also regularly listed on Ebay. However, there doesn't seem to be anything readilly available which has a collar to sit over a plain pipe, which I suspect might meet David's needs. They are widely available with a flange fitting, for mounting to flat surfaces, or rail fittings to attach to horizontal deck rails, but perhaps a trawl through some of the marine suppliers might throw up something else that could do the job without the need for threading the end of the pipe. regards Nigel GM8PZR

640NW 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. >--------------- >As commented previously, this is a common fitting and fairly standard for >GPS antennas and some other antenna kit, especially in a marine environment. > >A variety of adaptors is available from marine suppliers ranging from >expensive stainless steel fittings to much cheaper plastic, they are also >regularly listed on Ebay. > >However, there doesn't seem to be anything readilly available which has a >collar to sit over a plain pipe, which I suspect might meet David's needs. >They are widely available with a flange fitting, for mounting to flat >surfaces, or rail fittings to attach to horizontal deck rails, but perhaps a >trawl through some of the marine suppliers might throw up something else that >could do the job without the need for threading the end of the pipe. > >regards > >Nigel >GM8PZR >_______________________________________________ >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.

s@gmx.de writes: > > 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. > > > --------------- > As commented previously, this is a common fitting and fairly standard for > GPS antennas and some other antenna kit, especially in a marine > environment. > > A variety of adaptors is available from marine suppliers ranging from > expensive stainless steel fittings to much cheaper plastic, they are also > regularly listed on Ebay. > > However, there doesn't seem to be anything readilly available which has a > collar to sit over a plain pipe, which I suspect might meet David's > needs. > They are widely available with a flange fitting, for mounting to flat > surfaces, or rail fittings to attach to horizontal deck rails, but perhaps > a > trawl through some of the marine suppliers might throw up something else > that > could do the job without the need for threading the end of the pipe. > > regards > > Nigel > GM8PZR > _______________________________________________ > 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. >

/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

so it will either need to be available in different sizes or adapters provided. I don't see any problem with that but it might start to get expensive for home use. When I finally get round to mounting my timing antennas outdoors, so far my little Motorola magnetic patches seem to see an awful lot of sky from indoors, if I can't find a similar adapter that fits I'll probably just use a standard mast clamp arrangement with a 90 degree bracket and fix one of the cheap plastic mounts to that. Not so neat, and a bit more wind resistance, but not too much hassle either:-) regards Nigel

an adapter from Male PG-21 to your choice. -John =============

Nigel GM8PZR