Help - can somebody ID this preamp?

Help - can somebody ID this preamp?

Postby dukeplaysbass » Thu Nov 03, 2011 2:15 pm

Got no clue as to what this is. It came out of a StingRay I got back in the Spring, and it seemed to be a 2EQ function. Worked fine, but the dude I got it from had the input going to the control panel, and left the input hole wide open. Stuff like that always seems to me to be asking for trouble.

The seller included a blown EB 3EQ in the sale, which I sent off to EB for a replacement. When I got the new one, I yanked this out. It's been sitting around the barn ever since.

Image
Image

Any help figuring out what this is would be appreciated....
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Re: Help - can somebody ID this preamp?

Postby Rod Trussbroken » Thu Nov 03, 2011 3:01 pm

It's 2EQ pre-amp for a SR4. That particular layout was used up to c.1990 before the board shape was changed. It could be a home-made one.??

Below is a replacement made by Ernie Ball:

Image
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Re: Help - can somebody ID this preamp?

Postby dukeplaysbass » Thu Nov 03, 2011 4:44 pm

Rod Trussbroken wrote: It could be a home-made one.??


Looks awfully pro to me. Even the wires are the proper colors. Are there any markings on the official EB ones that I should look for?
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Re: Help - can somebody ID this preamp?

Postby Rod Trussbroken » Thu Nov 03, 2011 10:29 pm

The more I look at it the more I think it's home made. Some of the components are physically too large. One of the electrolytics seems to be sitting over the edge of the board.

An underneath view close up of the borad will quickly show if it is. Can you get a pic of it ?
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Re: Help - can somebody ID this preamp?

Postby harleyyy » Thu Nov 03, 2011 10:42 pm

Rod Trussbroken wrote:The more I look at it the more I think it's home made. Some of the components are physically too large. One of the electrolytics seems to be sitting over the edge of the board.

An underneath view close up of the borad will quickly show if it is. Can you get a pic of it ?



Gav, wouldn't the PCB have a patent stamped on it?
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Re: Help - can somebody ID this preamp?

Postby Rod Trussbroken » Fri Nov 04, 2011 5:22 am

harleyyy wrote:
Rod Trussbroken wrote:The more I look at it the more I think it's home made. Some of the components are physically too large. One of the electrolytics seems to be sitting over the edge of the board.

An underneath view close up of the borad will quickly show if it is. Can you get a pic of it ?



Gav, wouldn't the PCB have a patent stamped on it?


Pete, out of all the hundreds (and hundreds) of Bass files I have I cant find a reverse pic of the preamp for that period. My expereience is that there won't be a patent number.

A pic of the reverse, in this case, would certainly settle the matter.

It would also be handy to know the year (or serial) of the Bass we"re talking about!!!

There is at least one pot that is not original.
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Re: Help - can somebody ID this preamp?

Postby harleyyy » Fri Nov 04, 2011 8:12 am

Interesting, thanks!
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Re: Help - can somebody ID this preamp?

Postby dukeplaysbass » Fri Nov 04, 2011 10:33 am

Here's the flip.

Image
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Re: Help - can somebody ID this preamp?

Postby Gil Escalera » Fri Nov 04, 2011 10:54 am

That is a nicely done "homemade" or prototype board.

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Re: Help - can somebody ID this preamp?

Postby Rod Trussbroken » Fri Nov 04, 2011 8:35 pm

It's one of these (below) and is home-made. They sold on ebay some time ago for around $50. I bought one out of curiousity. Due to bad soldering it didn't work.

I'd say that was the case with Dukes (above) and the owner substuted parts in an attemp to get it working.

The underside board (lower) in the sample pic below has been resoldered to remove the excess solder as is depicted on the board just above.

Image
.
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Re: Help - can somebody ID this preamp?

Postby dukeplaysbass » Sat Nov 05, 2011 12:08 am

Thanks, guys! So, even though it works, it ain't worth much, correct?
Father Gino wrote:...back when men were men and basses had four strings.


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Re: Help - can somebody ID this preamp?

Postby Rod Trussbroken » Sat Nov 05, 2011 12:46 am

You'd probably get $90 to $100 (maybe more) seeing you have the pots.
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Re: Help - can somebody ID this preamp?

Postby GonzoBass » Sat Nov 05, 2011 12:21 pm

Rod Trussbroken wrote:Image

That's just scary!
[smilie=smilie_kopf.gif]
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/

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Re: Help - can somebody ID this preamp?

Postby Caca de Kick » Mon Nov 07, 2011 7:03 pm

It's nothing new. Like Rod mentioned someone on ebay was selling clone preamps, and on talkbass somone was also making them.
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