Ampeg BA 112 Amp Cover Removal

[Danny Aldred]

Got a 2nd hand BA 112 and found the bolt that holds a PC board or something rolling around in the bottom of cabinet. I could see the impression of Hex nut on back of cabinet. Could anyone tell me how to remove the cover. that is what Ampeg service Rep told me to do.

 

[JimmyM]

Then take out the speaker, reach in the cab, and get your screw out.

 

[Danny Aldred]

Then take out the speaker, reach in the cab, and get your screw out.

Jimmy I want to remove the cover for the amplifier not the speaker. Just not quite certain about how to go about it. I have to resecure board to back of cabinet. Thanks for the reply

 

[AlexanderB]

IME, on some Ampeg cabs one would pull the threads in the wood before the grille comes off.
The "perfect" tool to use here is something used at Mercedes to remove the central gauge cluster. It is a steel rod, similar to a bike wheel spoke, but with an angled hook at the end. Push it in, turn it so the hook grips, and then you pull the grill off. Easy and without damage.

 

[Grissle]

The amp unit can be wedged in there pretty tightly even after the mounting screws are removed. But it will come off.

 

[JimmyM]

Jimmy I want to remove the cover for the amplifier not the speaker. Just not quite certain about how to go about it. I have to resecure board to back of cabinet. Thanks for the reply

Hmmm...last edited by a moderator...that usually means they edited out some sort of wise-guy comment. Not sure if I want to continue helping.

 

[Danny Aldred]

Hmmm...last edited by a moderator...that usually means they edited out some sort of wise-guy comment. Not sure if I want to continue helping.

I don't know why it was edited. I just joined yesterday. New to Talk Bass

 

[Danny Aldred]

I don't know why it was edited. I just joined yesterday. New to Talk Bass

The Ampeg Rep told me to remove the srews for the cover but I am not certain if I have to remove the knobs or what I am just tring to remove the cover for the amplifier. Sorry for confusion

 

[Danny Aldred]

The amp unit can be wedged in there pretty tightly even after the mounting screws are removed. But it will come off.

Do you know how to remove amp cover? Is it just the 4 screws on the back or do you have to remove the big screws on the side?

 

[Vintage-Blue]

Do you know how to remove amp cover? Is it just the 4 screws on the back or do you have to remove the big screws on the side?

Have you removed the amplifier chassis from the cabinet yet? There are three screws on each side of the cabinet, back where the amp is. Those hold the amplifier in the cabinet. Once the amp is removed from the cabinet the top of it should be open so that you can see what's rattling. Note, this refers to the older version of the BA-112. I'm not sure if the newest version will be different. Be careful poking around inside as high voltage can still be present in capacitors even after the amp is powered off and unplugged.

 

[JimmyM]

The Ampeg Rep told me to remove the srews for the cover but I am not certain if I have to remove the knobs or what I am just tring to remove the cover for the amplifier. Sorry for confusion

You don't have to remove the knobs, no. Just the screws that hold in the chassis.

 

[Grissle]

The screws on the sides need to be removed, yes.

 

[Danny Aldred]

Have you removed the amplifier chassis from the cabinet yet? There are three screws on each side of the cabinet, back where the amp is. Those hold the amplifier in the cabinet. Once the amp is removed from the cabinet the top of it should be open so that you can see what's rattling. Note, this refers to the older version of the BA-112. I'm not sure if the newest version will be different. Be careful poking around inside as high voltage can still be present in capacitors even after the amp is powered off and unplugged.

View attachment 527971

Thanks it was a penny some kid probably dropped in the vent holes on the back of the amp. Man I am so glad I found this forum.

You don't have to remove the knobs, no. Just the screws that hold in the chassis.

Thanks Jimmy it was a penny some kid proably droppped down in the vent holes
Danny Aldred

 

[Danny Aldred]

The amp unit can be wedged in there pretty tightly even after the mounting screws are removed. But it will come off.

You were right it was tight.

Thanks

Danny Aldred

 

[JimmyM]

Good thing you got it out...could have shorted out something.

 

[Danny Aldred]

Good thing you got it out...could have shorted out something.

Thanks Jimmy I used to have a B-15 portaflex back in the late 60's my first amp I started out with that and aTelestar Bass. I wish I had one now but the BA 112 isn't toobad

 

[JimmyM]

Ya, I've got one of the new ones and I really dig it for the money.

 

[Danny Aldred]

Ya, I've got one of the new ones and I really dig it for the money.

Man I saw James Brown when I was 13 or 14 at the city stadium and his Bass Player had a B-18 with a ext. speaker. Man I had never heard such Bass in my life. We did not have enough to get in so we were peeking through holes in the fence.