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W2 directional coupler N-connector

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Paul Urie

W2 directional coupler N-connector

I am considering a small EME station on 432 Mhz. I would like to
measure output power up to 200 watts. It appears that the current
SO-239 connectors in the directional coupler could easily be changed
to female N-connectors. Has anyone done that and what has been your
experience.
Thanks,
73 Paul
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Ken G Kopp

Re: W2 directional coupler N-connector

Yes Paul, the connectors on the sending units are easily changed.
All mine have been changed using kits from Morse Express that
come with nicely-done interfacing plates to compensate for the
pattern change. I've also changed the three antenna connectors
on my K3 using these neat little kits.

A caution ... take note of the TRANSMITTER and LOAD labels and
the positioning of the cover. You have a 50-50 chance of reversing
the labeling if you reverse the cover. The labeling is on the -cover-
and not the unit itself.

73!

Ken Kopp - K0PP

On Tue, Aug 7, 2012 at 4:12 PM, <[hidden email]> wrote:
> I am considering a small EME station on 432 Mhz. I would like to
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Robert Friess

Re: W2 directional coupler N-connector

The sensors can be ordered with N connectors from Elecraft.

Bob, N6CM

On Tue, Aug 7, 2012 at 9:45 AM, Ken G Kopp <[hidden email]> wrote:

> Yes Paul, the connectors on the sending units are easily changed.
> All mine have been changed using kits from Morse Express that
> come with nicely-done interfacing plates to compensate for the
> pattern change. I've also changed the three antenna connectors
> on my K3 using these neat little kits.
>
> A caution ... take note of the TRANSMITTER and LOAD labels and
> the positioning of the cover. You have a 50-50 chance of reversing
> the labeling if you reverse the cover. The labeling is on the -cover-
> and not the unit itself.
>
> 73!
>
> Ken Kopp - K0PP
>
> On Tue, Aug 7, 2012 at 4:12 PM, <[hidden email]> wrote:
> > I am considering a small EME station on 432 Mhz. I would like to
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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Eric Swartz - WA6HHQ

Re: W2 directional coupler N-connector

Administrator

In reply to this post by Ken G Kopp

Please note that changing the connectors from SO-239s to N's will
uncalibrate the W2's directional coupler as you go higher in frequency -
especially on 432 MHz, leading to less accurate SWR indications. It may
also affect wattmeter accuracy.

We included additional compensation components in the coupler design to
cancel the reluctance of the SO-239s, flattening the coupler's frequency
response.

73,

Eric
---
www.elecraft.com

On 8/7/2012 9:45 AM, Ken G Kopp wrote:

> Yes Paul, the connectors on the sending units are easily changed.
> All mine have been changed using kits from Morse Express that
> come with nicely-done interfacing plates to compensate for the
> pattern change. I've also changed the three antenna connectors
> on my K3 using these neat little kits.
>
> A caution ... take note of the TRANSMITTER and LOAD labels and
> the positioning of the cover. You have a 50-50 chance of reversing
> the labeling if you reverse the cover. The labeling is on the -cover-
> and not the unit itself.
>
> 73!
>
> Ken Kopp - K0PP
>
> On Tue, Aug 7, 2012 at 4:12 PM, <[hidden email]> wrote:
>> I am considering a small EME station on 432 Mhz. I would like to
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

riese-k3djc

Re: W2 directional coupler N-connector

In reply to this post by Paul Urie

not sure why you would change UHFs are good at 432,just need
taping,, but then I tape type Ns too,,use good quality Amphenol UHF
connectors
I used them on a stacked set of K2RIW at 432 and after 15 year of service
looked as good as when I put then up

Bob K3DJC
On Tue, 07 Aug 2012 10:12:47 -0600 [hidden email] writes:

> I am considering a small EME station on 432 Mhz. I would like to
> measure output power up to 200 watts. It appears that the current
> SO-239 connectors in the directional coupler could easily be changed
>
> to female N-connectors. Has anyone done that and what has been your
>
> experience.
> Thanks,
> 73 Paul
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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GARY-2

Re: W2 directional coupler N-connector

One reason I experience is that UHF connectors are not available for all
types of coaxial cable. Case in point, UHF connectors are no longer
available for some sizes of Andrew (now Commscope) Heliax however type-N or
BNC are for those sizes. So it's not always a bandwidth, loss, or impedance
related problem but a simple hardware issue instead.
Gary
N6LRV

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of [hidden email]
Sent: Tuesday, August 07, 2012 1:08 PM
To: [hidden email]
Cc: [hidden email]
Subject: Re: [Elecraft] W2 directional coupler N-connector

not sure why you would change UHFs are good at 432.....

Bob K3DJC

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Paul Urie

Re: W2 directional coupler N-connector

In reply to this post by Eric Swartz - WA6HHQ

Thanks for all of the comments. I had an early experience in ham radio
with satellites, AO-10 and AO-13, at frequencies 144, 430, 1.3 Ghz and 2.4
Ghz. Because of those frequencies N-connectors became a way of life. So I
automatically think of N-connectors when I am working with those
frequencies. If Elecraft offered the directional coupler with
N-connectors, I would buy it and pay extra for the connectors.

73,
Paul N7QOC

On 8/7/12 11:18 AM, "Eric Swartz - WA6HHQ, Elecraft" <[hidden email]>
wrote:

>Please note that changing the connectors from SO-239s to N's will
>uncalibrate the W2's directional coupler as you go higher in frequency -
>especially on 432 MHz, leading to less accurate SWR indications. It may
>also affect wattmeter accuracy.
>
>We included additional compensation components in the coupler design to
>cancel the reluctance of the SO-239s, flattening the coupler's frequency
>response.
>
>73,
>
>Eric
>---
>www.elecraft.com
>
>On 8/7/2012 9:45 AM, Ken G Kopp wrote:
>> Yes Paul, the connectors on the sending units are easily changed.
>> All mine have been changed using kits from Morse Express that
>> come with nicely-done interfacing plates to compensate for the
>> pattern change. I've also changed the three antenna connectors
>> on my K3 using these neat little kits.
>>
>> A caution ... take note of the TRANSMITTER and LOAD labels and
>> the positioning of the cover. You have a 50-50 chance of reversing
>> the labeling if you reverse the cover. The labeling is on the -cover-
>> and not the unit itself.
>>
>> 73!
>>
>> Ken Kopp - K0PP
>>
>> On Tue, Aug 7, 2012 at 4:12 PM, <[hidden email]> wrote:
>>> I am considering a small EME station on 432 Mhz. I would like to
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>