W2 problem

[STEPHEN BUNTING]

Hi everyone,

I have a little used W2 wattmeter that has stopped working, but I have recently
had access to a working unit so I could test the display and sensor unit
independently. Both of mine have faults -

The display has lost port nr 1 and it looks like R10 has been damaged on the
PCB. What physical size is this resistor? I can see from the cct diagram that it
is 330R. I don't do much SMD work so don't recognise the physical sizes.....

My 2KW HF sensor displays high SWR and low power into a known good load when
used with my friends "good" W2. I cant see any physical problems, so how do I go
about fault finding this or getting it fixed?

Can I use a regular Ethernet cable to connect display and sensor? I used one to
test my display with a known good sensor on port 2, but sometimes the display
went haywire whilst on the air. I see elecraft supply a flat 8P8C RJ45 cable, so
I guess there is an engineering reason for that?

Thanks for your advice!

73

Steve, M0BPQ
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[John-6]

Hi All,

I'd be interested in the answers to this, as my W2 also recently lost the
same R10 component. And especially the answers about the Ethernet/signal
cables too...

73, and a firm left handshake,
John (2E0XLX)

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of
STEPHEN BUNTING
Sent: 20 June 2016 16:03
To: elecraft <[hidden email]>
Subject: [Elecraft] W2 problem

Hi everyone,

I have a little used W2 wattmeter that has stopped working, but I have
recently had access to a working unit so I could test the display and sensor
unit independently. Both of mine have faults -

The display has lost port nr 1 and it looks like R10 has been damaged on the
PCB. What physical size is this resistor? I can see from the cct diagram
that it is 330R. I don't do much SMD work so don't recognise the physical
sizes.....

My 2KW HF sensor displays high SWR and low power into a known good load when
used with my friends "good" W2. I cant see any physical problems, so how do
I go about fault finding this or getting it fixed?

Can I use a regular Ethernet cable to connect display and sensor? I used one
to test my display with a known good sensor on port 2, but sometimes the
display went haywire whilst on the air. I see elecraft supply a flat 8P8C
RJ45 cable, so I guess there is an engineering reason for that?

Thanks for your advice!

73

Steve, M0BPQ
______________________________________________________________
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Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html Message
delivered to [hidden email]

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[M0XDF]

At a guess, because it's simple to crimp. I doubt that the normal twisted pairs of CAT5 was the reason to not use it.

-73 de M0XDF (from my iPhone)

> On 21 Jun 2016, at 11:29, John <[hidden email]> wrote:
>
> . I see elecraft supply a flat 8P8C
> RJ45 cable, so I guess there is an engineering reason for that?

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