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250 Bass Amp Head [message #28078]

Fri, 05 March 2021 00:42

chemita57
Messages: 3
Registered: March 2021

Junior Member

Do the small rivets on the sides of the rear panel of the amp head need to be drilled out to pull out the electronics?

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Re: 250 Bass Amp Head [message #28079 is a reply to message #28078]

Fri, 05 March 2021 05:33

stevem
Messages: 4778
Registered: June 2004
Location: NY

Senior Member

The complete chassis slides out the rear of the cabinet by removing the four 10/32 machine screws on the bottom of the cabinet, do not remove the 4 metal feed on the bottom if they are still there.

Do not drill out the riviets as they hold the chassis together . Why is it you need to gain access to the inside of the amp

[Updated on: Fri, 05 March 2021 05:37]

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Re: 250 Bass Amp Head [message #28080 is a reply to message #28079]

Fri, 05 March 2021 10:23

chemita57
Messages: 3
Registered: March 2021

Junior Member

I need to clean out the pots and replace the bulbs. By the way, what size bulbs does this require.

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Re: 250 Bass Amp Head [message #28085 is a reply to message #28080]

Sat, 06 March 2021 09:34

chemita57
Messages: 3
Registered: March 2021

Junior Member

Thanks for the info. Now, where can I get the bulbs for the push button switches on the front panel?

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Re: 250 Bass Amp Head [message #28086 is a reply to message #28078]

Sat, 06 March 2021 11:37

stevem
Messages: 4778
Registered: June 2004
Location: NY

Senior Member

The bulbs are a number 335 and can be removed and installed from the front of the amp much easier then from the inside of the amp by using needle nose plyers to carefully remove the blue lens from the face of the switch.

Use some clear tubing to remove the old bulb and install the new one.

Do a search on line for the bulbs, I think I saw some on Amazon.

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