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Re: Topband: Rather use N-type (was Re: The answer to PL-259

To: TopBand List <topband@contesting.com>
Subject: Re: Topband: Rather use N-type (was Re: The answer to PL-259
From: donovanf@starpower.net
Date: Sat, 8 Dec 2018 11:58:49 -0500 (EST)
List-post: <mailto:topband@contesting.com>
Hi Jim, 


A 13-30 DIN connector is like a flange connector used with high 
power transmitters (e.g., television transmitters and 50 KW AM), 
but it uses threads rather than a flange. 


73 
Frank 
W3LPL 

----- Original Message -----

From: "Jim Thomson" <jim.thom@telus.net> 
To: "TopBand List" <topband@contesting.com> 
Sent: Saturday, December 8, 2018 4:49:47 PM 
Subject: Topband: Rather use N-type (was Re: The answer to PL-259 

Date: Fri, 7 Dec 2018 15:05:28 -0500 (EST) 
From: donovanf@starpower.net 
To: topband@contesting.com 
Subject: Re: Topband: Rather use N-type (was Re: The answer to PL-259 
soldering/reliability problems) 



<On the other hand, the much bulkier 7-16 DIN connectors offer 
<similar high performance and they're widely available at much 
<more affordable prices. For example, do this Google search 


<73 
<Frank 
<W3LPL 

## If you want to see something real silly, look at heliax, like 
.875 inch, or larger, with a type N connector installed. Here 
you have this large diameter heliax.... with a massive type N connector, 
complete with the puny, BNC sized center pin. At the telco I worked at 
for 34 years, all our cell sites eventually changed out to the more robust 
7-16 DIN. Its 7mm, and 16mm, NOT 7/16 inch . 

## On a side note they also make a bigger DIN, called a 13-30, which is 
over the top. 

## On .875 and bigger heliax, and stuff like LMR-1200DB, the only available 
connectors are Type N and 7-16 DIN. No brainer here folks. Hardly any 
difference 
in price between the 2 connectors on the larger cables. The center pin on any 
7-16 DIN 
is huge..and the V stand off is superb on a 7-16 DIN.. like 2900 V rms...add 41 
% for peak value. 
The beauty of the 7-16 DIN is.. the female chassis connector is only 1.25 inch 
square..... vs the 1 inch square of either 
a Type N or a SO-239. 

## The 7-16 din is similar to a Type N in that the shield path is on an inner 
collet..and not the outer threads... they are 
2 different items. But both are zero ohms between them. You can also apply 5 X 
more tightening Torque on a 7-16 Din, 
vs Type N. You wont blow up a 7-16 din anytime soon. I use the dins on 
LMR-1200DB, and also LMR-600, 600UF, 
and also RG-393. 

Jim VE7RF 

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