Re: low power out on HF


D C *Mac* Macdonald
 

Do NOT, repeat, do NOT remove the ground leg fuse
in a mobile installation.  A lost vehicle ground can
cause attempting to start the vehicle to use your
expensive radio to become the ground path according
to many sources.  That is why the factory lead has
that fuse.
 
73 - Mac, K2GKK/5
Since 30 Nov 1953
Oklahoma City, OK
USAF (Retired) 61-81
FAA (Retired) 94-10
 


From: ic7000@groups.io <ic7000@groups.io> on behalf of Helmut Wabnig <hwabnig@...>
Sent: Wednesday, March 31, 2021 02:16
To: ic7000@groups.io <ic7000@groups.io>
Subject: Re: [ic7000] low power out on HF
 
On Tue, 30 Mar 2021 14:34:17 -0500, you wrote:

>I have personally experienced this, after discovering 30 watts output on hf
>on a used rig
>I bought.  I was not happy, but amazed to discover warmth around the fuse
>holders and
>adjacent power cable.  I measured around 1.4 or more volts drop at radio
>thanks to this
>oxidation that I discovered on the fuse blades.  I cleaned them back to
>shiny state, and
>problem was resolved for only a while...so I soldered the fuses inside the
>fuse cases and no
>problems since- full power out, no more excessive voltage drop (the IC 7000
>requires
>near full voltage for expected power out).
>
>I was amazed.  The two lines of oxidation were very visible on the fuse
>blades before
>buffing them out.
>
>73,
>
>Steve    W5ZA
>

Usually only one fuse is sufficient, remove the ground wire fuse.

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