Hi Dave, I was curious that BSP did not fit. I just grabbed some hardware to try. A 3/4 BSP blank just fitted a Trimble pallisade but not the female end of a Shakespeare short mast. The trimble spec says 1-14TPI or 3/4NPT. It is looser on the shakespeare thread (1-14). I guess it has a thread cut for either and your antenna it 1-14 only. A 3/4-BSPT might fit but a marine mount might be best. I whish I still had access to the CNC lathe at my last employers. It would only take a few minutes to knock some up from 30mm hex bar! --- On Tue, 7/7/09, David C. Partridge <david.partridge@dsl.pipex.com> wrote: > From: David C. Partridge <david.partridge@dsl.pipex.com> > Subject: Re: [time-nuts] 1" 14 tpi UNS die > To: "'Discussion of precise time and frequency measurement'" <time-nuts@febo.com> > Date: Tuesday, 7 July, 2009, 7:10 PM > As it would appear to an expensive > option to purchase the appropriate dies > "over here", and as the pipe is soft alloy, I've just > reduced its diameter a > bit so it's an tight push fit in the antenna base (for now) > - though still > hoping to find a good solution with spending lots of dosh! > > Thanks to all > Dave > > -----Original Message----- > From: time-nuts-bounces@febo.com > [mailto:time-nuts-bounces@febo.com] > On > Behalf Of GandalfG8@aol.com > Sent: 07 July 2009 18:54 > To: time-nuts@febo.com > Subject: Re: [time-nuts] 1" 14 tpi UNS die > > > In a message dated 07/07/2009 18:43:55 GMT Daylight Time, > Arnold.Tibus@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. > > > _______________________________________________ > 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. >