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Discussion of precise time and frequency measurement

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Power Connectors and D-Subs...

UK
Ulf Kylenfall
Sun, Jun 25, 2017 7:25 PM

Why not take a look at mixed D-Sub connectors?There are versions with Coax, and also (fits same shell holes) high current pins and sleevesthat share the house with standard pins and sleeves.
The rest of this infra structure like shells and locking mechanismsare readily available. Another BIG advantage is that there are a large numberof versions available for direct PCB soldering. Straight and right angle.
Hermetic/moisture proof and also filtered versions as well.
But: due to the slide on/in nature of these connectors, at my work, we never use themfor precision timing. The requirement for Geodetic VLBI calls for pico second resolutionand stability.
We use N, TNC or SMA.
BNC or any other non-threaded/bayonnet connector is strictly prohibited.
Ulf - SM6GXV

Why not take a look at mixed D-Sub connectors?There are versions with Coax, and also (fits same shell holes) high current pins and sleevesthat share the house with standard pins and sleeves. The rest of this infra structure like shells and locking mechanismsare readily available. Another BIG advantage is that there are a large numberof versions available for direct PCB soldering. Straight and right angle. Hermetic/moisture proof and also filtered versions as well. But: due to the slide on/in nature of these connectors, at my work, we never use themfor precision timing. The requirement for Geodetic VLBI calls for pico second resolutionand stability. We use N, TNC or SMA. BNC or any other non-threaded/bayonnet connector is strictly prohibited. Ulf - SM6GXV
PK
Poul-Henning Kamp
Sun, Jun 25, 2017 8:37 PM

In message 1317347843.1873959.1498418740432@mail.yahoo.com, Ulf Kylenfall via
time-nuts writes:

Why not take a look at mixed D-Sub connectors?

Because they cost a fortune ?

--
Poul-Henning Kamp      | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG        | TCP/IP since RFC 956
FreeBSD committer      | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

-------- In message <1317347843.1873959.1498418740432@mail.yahoo.com>, Ulf Kylenfall via time-nuts writes: >Why not take a look at mixed D-Sub connectors? Because they cost a fortune ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
BK
Bob kb8tq
Sun, Jun 25, 2017 9:53 PM

Hi

Cost a fortune and can easily get you into 12 week delivery times ….

Bob

On Jun 25, 2017, at 4:37 PM, Poul-Henning Kamp phk@phk.freebsd.dk wrote:


In message 1317347843.1873959.1498418740432@mail.yahoo.com, Ulf Kylenfall via
time-nuts writes:

Why not take a look at mixed D-Sub connectors?

Because they cost a fortune ?

--
Poul-Henning Kamp      | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG        | TCP/IP since RFC 956
FreeBSD committer      | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.


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Hi Cost a fortune *and* can easily get you into 12 week delivery times …. Bob > On Jun 25, 2017, at 4:37 PM, Poul-Henning Kamp <phk@phk.freebsd.dk> wrote: > > -------- > In message <1317347843.1873959.1498418740432@mail.yahoo.com>, Ulf Kylenfall via > time-nuts writes: > >> Why not take a look at mixed D-Sub connectors? > > Because they cost a fortune ? > > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > 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.
CH
Christopher Hoover
Tue, Jun 27, 2017 1:19 AM

On Sun, Jun 25, 2017 at 2:53 PM, Bob kb8tq kb8tq@n1k.org wrote:

Hi

Cost a fortune and can easily get you into 12 week delivery times ….

oh lord.  tell me about it.

we need to put lemo's in the same bucket -- expensive and long lead times.

(they are so expensive there are counterfeits.  really good looking
counterfeits, yes, but oversize.)

On Sun, Jun 25, 2017 at 2:53 PM, Bob kb8tq <kb8tq@n1k.org> wrote: > Hi > > Cost a fortune *and* can easily get you into 12 week delivery times …. > oh lord. tell me about it. we need to put lemo's in the same bucket -- expensive and long lead times. (they are so expensive there are counterfeits. really good looking counterfeits, yes, but oversize.)
BK
Bob kb8tq
Tue, Jun 27, 2017 2:06 AM

Hi

I’m not claiming Lemo’s are any cheaper or easier to get than the uber D’s. At least they
give a bit better density.

Bob

On Jun 26, 2017, at 9:19 PM, Christopher Hoover ch@murgatroid.com wrote:

On Sun, Jun 25, 2017 at 2:53 PM, Bob kb8tq kb8tq@n1k.org wrote:

Hi

Cost a fortune and can easily get you into 12 week delivery times ….

oh lord.  tell me about it.

we need to put lemo's in the same bucket -- expensive and long lead times.

(they are so expensive there are counterfeits.  really good looking
counterfeits, yes, but oversize.)


time-nuts mailing list -- time-nuts@febo.com
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Hi I’m not claiming Lemo’s are any cheaper or easier to get than the uber D’s. At least they give a bit better density. Bob > On Jun 26, 2017, at 9:19 PM, Christopher Hoover <ch@murgatroid.com> wrote: > > On Sun, Jun 25, 2017 at 2:53 PM, Bob kb8tq <kb8tq@n1k.org> wrote: > >> Hi >> >> Cost a fortune *and* can easily get you into 12 week delivery times …. >> > > oh lord. tell me about it. > > we need to put lemo's in the same bucket -- expensive and long lead times. > > (they are so expensive there are counterfeits. really good looking > counterfeits, yes, but oversize.) > _______________________________________________ > 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.
CH
Christopher Hoover
Tue, Jun 27, 2017 2:19 AM

I’m not claiming Lemo’s are any cheaper or easier to get than the uber
D’s. At least they
give a bit better density.

we are in violent agreement.

On Mon, Jun 26, 2017 at 7:06 PM, Bob kb8tq kb8tq@n1k.org wrote:

Hi

I’m not claiming Lemo’s are any cheaper or easier to get than the uber
D’s. At least they
give a bit better density.

Bob

On Jun 26, 2017, at 9:19 PM, Christopher Hoover ch@murgatroid.com

wrote:

On Sun, Jun 25, 2017 at 2:53 PM, Bob kb8tq kb8tq@n1k.org wrote:

Hi

Cost a fortune and can easily get you into 12 week delivery times ….

oh lord.  tell me about it.

we need to put lemo's in the same bucket -- expensive and long lead

times.

(they are so expensive there are counterfeits.  really good looking
counterfeits, yes, but oversize.)


time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/

mailman/listinfo/time-nuts

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> > I’m not claiming Lemo’s are any cheaper or easier to get than the uber > D’s. At least they > give a bit better density. we are in violent agreement. On Mon, Jun 26, 2017 at 7:06 PM, Bob kb8tq <kb8tq@n1k.org> wrote: > Hi > > I’m not claiming Lemo’s are any cheaper or easier to get than the uber > D’s. At least they > give a bit better density. > > Bob > > > On Jun 26, 2017, at 9:19 PM, Christopher Hoover <ch@murgatroid.com> > wrote: > > > > On Sun, Jun 25, 2017 at 2:53 PM, Bob kb8tq <kb8tq@n1k.org> wrote: > > > >> Hi > >> > >> Cost a fortune *and* can easily get you into 12 week delivery times …. > >> > > > > oh lord. tell me about it. > > > > we need to put lemo's in the same bucket -- expensive and long lead > times. > > > > (they are so expensive there are counterfeits. really good looking > > counterfeits, yes, but oversize.) > > _______________________________________________ > > 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. >