How to access fuse block?

[DAN REID]

Greetings,
Recently purchased kpa-500 and need to know how to access fuse block to insert fuse.  Configuration not userfriendly for the blind.  Any directions would be appreciated.  Thanks, Dan

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[ANDY DURBIN]

"Recently purchased kpa-500 and need to know how to access fuse block to insert fuse. Configuration not user friendly for the blind.   Any directions would be appreciated."

There are instructions and photos in the Owner's Manual but I found it awkward to work on even with normal sight.  I'd suggest asking for sighted help but if that's not an option send me an email and I'll try to write up some instructions for you to follow.   I have helped a few local ops with vision impairment.

73,
Andy, k3wyc
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[Don Wilhelm]

Dan,

In my opinion, that fuse block will be difficult for an amateur without
at least some limited sight.
First you have to use a screwdriver to pry out the block.  Inserting the
fuses might possibly be done using only tactile sensation, but inserting
the fuse block the right way up so the proper voltage is shown in the
window would be difficult without sight.

If you can get the assistance of someone who has normal sight, the
procedure is shown on pages 5 and 6 of the KPA500.  It is not difficult.

I am not certain why the fuses are not installed before shipment, but I
always assumed it was because different fuses are used for 120 volt and
240 volt operation, and the operator is forced to make that 120 or 240
volt decision before he can apply power and possibly damage the
amplifier if the wrong one is selected.

73,
Don W3FPR

On 3/16/2019 11:47 AM, DAN REID wrote:
> Greetings,
> Recently purchased kpa-500 and need to know how to access fuse block to insert fuse.  Configuration not userfriendly for the blind.  Any directions would be appreciated.  Thanks, Dan
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[ke9uw]

From: hawley, charles j jr
Sent: Saturday, March 16, 2019 11:50 AM
To: DAN REID; [hidden email]
Subject: Re: How to access fuse block?

You will need someone to visually see the correct selected mains voltage and fuse ratings to complete this job.

The instructions say to face the line cord area and with the line cord on the left, feel for the slot on the right and pry it up with a small screwdriver to open up the fuse area. then prying from the same side, pry the fuse block straight  out completely. The 6 amp fuses are for 240 vac and the 12 amp fuses for the 120 vac. The fuses are inserted with the springy end toward the rear of the fuse holder when it is reinserted. The fuse holder will have to be rotated 180 degrees vertically depending on the desired mains voltage selected. The correct mains voltage should appear on the right side of the fuse holder block and be visible in the cover window when it is pressed back closed. As you reinsert the fuse holder press the springy ends of the fuses into the block with your fingers so that the block can be started into the fuse holder cavity. The fuse holder is inserted all the way so that it is pressed in flush with the area it is inserted into. Then push close the cover clos
 ed.



Chuck Hawley
 [hidden email]

 Amateur Radio, KE9UW
 aka Jack, BMW Motorcycles

________________________________
From: [hidden email] <[hidden email]> on behalf of DAN REID <[hidden email]>
Sent: Saturday, March 16, 2019 10:47 AM
To: [hidden email]
Subject: [Elecraft] How to access fuse block?

Greetings,
Recently purchased kpa-500 and need to know how to access fuse block to insert fuse.  Configuration not userfriendly for the blind.  Any directions would be appreciated.  Thanks, Dan

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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[Elecraft mailing list]

I mentioned to Dan on another list that while I did install the fuses
myself  a few years ago, I did get sighted help to confirm the  right
voltage was showing in the window  before powering it up.

It's too nice and too expensive a piece of gear to risk turning it into
a smoldering pile of whatever.

73, Steve KW3A
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