Date: Wed, 21 Apr 2010 03:15:01 -0400
From: "Roger (K8RI)" <K8RI-on-TowerTalk@tm.net>
Subject: Re: [TowerTalk] 7-16 Din?
Jim Miller wrote:
> In the current discussion of N/UHF connectors the 7-16DIN was
> mentioned and I googled it to see what it was all about.
>
> Is this popular outside of the US?
## It was originated by the German military in the mid 60's.
Commerical user's in EU were next. Spread to NA in the
mid 90's.
>
> What improvements does it have over the N?
### 2900 v rms vs 500 vrms. Good to 6 Ghz. Handles 20 kw
pep on hf bands. Not much bigger than a typeN /so-239.
1.25" square vs 1" square for a female chassis connector.
## BTW, that '10kw PEAK' rating for a type N is PEAK...
which is DOUBLE PEP /RMS ! A 100 w light bulb is 200 w
PEAK. 120 vac = 170 v PEAK. Peak V / fixed resistance =
PEAK current. Peak current x Peak Voltage = Peak power.
## Ur 1.5 kw pep out linear actually puts out...'3 kw PEAK'
Peak power is a bs rating... if u see it being used... divide by
two, to get the real rating.
>
Better fit, better construction, more rugged, higher ratings to higher
frequencies, and just generally better all the way around. I under
stand the cell and cable companies are standardizing on them (for other
than the 75 ohm hard line) so with the large market the price *should*
be coming down and the availability going up.
## all the telco's and all cell co's in NA have switched to 7-16 DIN
as of Dec 31 -2009. Failure prone type N's are now history.
## For most coax cables... like 7/8" heliax and bigger.. and
LMR-1200 and bigger.. only connector's available are Type N
and 7-16 Din [and in some cases 7/8" EIA flange connectors]
## If you want to see something silly, look at 1.25" heliax...
with a type N installed. You have a connector, the size of a coffee mug
with this tiny pin in the middle.. the same size as a BNC pin on ur 2m
hand held/rubber duck ant. For $2.00 more... you can buy a 7-16 DIN.
## Andrew stopped making UHF connector's for 7/8" heliax a long time
ago.
## center pin in a 7-16 Din is huge.. like a 22 round. There is no RF on the
pin anyway.. it all flows down the outside of the mating 7mm female [7mm=.284"]
The shield collet is 16 mm ID.. which is huge. You can now get 7-16 Dins
for ANY coax... right down to RG-58 and and 213 sizes. Loads of 7-16
connectors/hardware/chassis connectors available surplus. It's the
new standard... while still being relatively small vs Type N. Water proof..
and you can
apply 5 X the torque VS a type N.
## Array solutions, et all, has 7-16 Din as options on most of their equipment,
from baluns to remote switch box's, etc. UHF connector's are great... but
I would not use a type N on any big coax... not cost effective at all VS 7-16
DIN.
later.......... Jim VE7RF
They kinds look like an N
connector on steroids, but they really are much better. As Hector said,
they are the ones the big boys are using.
73
Roger (K8RI)
> Is it available for sale in the US? I wasn't able to find it at the
> usual Ham outlets.
>
> tnx
> jim ab3cv
> _______________________________________________
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|