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Author Topic: Removing Knobs  (Read 1162 times)
K9OJT
Member

Posts: 27




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« on: June 17, 2013, 04:39:53 PM »

Hi All...

How are the knobs on an AL-811 removed? I need to change the power switch and don't want to break anything while removing the front cover.

Thanks in advance

Mike K9OJT
(formerly AC8IR)
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K7MH
Member

Posts: 339




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« Reply #1 on: June 17, 2013, 04:59:01 PM »

You don't need to unless they have dramatically changed things since mine was made. It is a snap in switch. I just replaced mine a few months ago.
It comes out easily once you take all the screws out for the cabinet and unsolder it. If you have a new one already that is the correct switch you will see how it snaps in.
It takes longer to get all the screws out than it does to replace the switch!
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N4ATS
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Posts: 810




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« Reply #2 on: June 18, 2013, 04:46:07 AM »

To answer your question "if" you need to remove them as some switches were recessed a little. There is a small allen set screw that holds each knob on , look thru the hole on the side of the knob and you will see it.
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W9KDX
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Posts: 770




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« Reply #3 on: June 18, 2013, 05:29:04 AM »

To answer your question "if" you need to remove them as some switches were recessed a little. There is a small allen set screw that holds each knob on , look thru the hole on the side of the knob and you will see it.

My newer model 811H uses slotted screws.  Good old MFJ cost cutting.
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Sam
W9KDX
KE3WD
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Posts: 5689




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« Reply #4 on: June 18, 2013, 07:30:19 AM »

You should not have to remove all the knobs - or any of the knobs, for that matter, to change out the Power Switch. 
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G3RZP
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Posts: 4565




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« Reply #5 on: June 18, 2013, 11:38:48 AM »

Any equipment with slotted grub screws in the knobs should have them replaced by hex head grub screws. Or Bristol if you prefer. I always put a good smear of grease on the grub screws, too - especially with aluminium knobs or plastic knobs with aluminium inserts, but even with brass inserts. Helps no end when years later, that knob needs removing. Worth going to stainless steel grub screws too, but the grease is essential.

Unless of course, you don't aim on keeping the equipment and don't mind if some other Joe Soap gets the problem....
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