Amp Guts Photos - Official Thread - Lets see those pics

[ttyR2]

The wifes AH250SMX, build date 5/16/1993:

Has a no-name 12AX7 installed. Bought off ebay for $200. Needed the Pre-Shape indicator LED replaced, and most of the case screws were partially stripped. Fixed all that and damn is this thing loud. Most impressive!

The layout is interesting. The front section feeds line-level signals via the small bundle of grey wires back to the effects send/return, tuner-out, and foot switch PCB, and the amp section is fed off that board with a two conductor shielded wire. I assume the pre-amp-only version of this unit just leaves the amp section out.

 

[B-string]

Sorry I saw "wife's" and something topless and.....back to reality. Nicely laid out

 

[ttyR2]

As seen in the pictures, I need a green cap for the master volume control. British Audio Service is out of them. Who else should I check with short of TE in England?

 

[fdeck]

Here's one of my old GK MB2-500

I've always admired the aesthetics of Bob Gallien's circuit boards, and his schematics are works of art too.

 

[BillyB_from_LZ]

As seen in the pictures, I need a green cap for the master volume control. British Audio Service is out of them. Who else should I check with short of TE in England?

I looked at British Audio Service's web site. The knob is described as being from Ritel. Doing a Google search and trying to narrow it down a bit, I got to this page (where you can find Ritel part numbers):

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While it's in German (?), the drop down menus help narrow it down (Farbe means color and they show you color bands). I don't speak or read German but I find if you read a German word phonetically, many are surprisingly similar or you can pick out the general meaning. Trace Elliot knob caps seem to be of the prismatic shape.

Looking at the datasheet for knob caps on Ritel's website, the heading says Bulgin Ritel range of knobs. Doing a Google search for that, I found this distributor list in the US:

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Once you figure out the part number (from the Ritel page linked above) you could probably track down a local distributor.

The twist would be if Trace Elliot has/had knob caps molded (I guess that would be moulded in UK English) in a custom colour...then Trace Elliot/British Audio Service might be the only source (short of eBay or similar).

Good luck!!!

 

[pagiatis]

I wonder why there are no markbass guts in this thread yet.
Isn't anyone curious as to how these are laid out inside? I sure am.

 

[BillyB_from_LZ]

I wonder why there are no markbass guts in this thread yet.
Isn't anyone curious as to how these are laid out inside? I sure am.

Bass Gear Magazine has a "topless" shot of a Little Mark II in it.

 

[tombowlus]

Bass Gear Magazine has a "topless" shot of a Little Mark II in it.

Yup, in issue #1. You can also see a gut shot of the Classic 300 in issue #2.

 

[pagiatis]

Bass Gear Magazine has a "topless" shot of a Little Mark II in it.

Yup, in issue #1. You can also see a gut shot of the Classic 300 in issue #2.

Thanks, I finally found it.
Here it is for everone to see. (sorry for the image quality, but this is what was in the pdf file)

 

[sonicnuance]

Here's one of my old GK MB2-500

GK was advertising a transformer isolated DI on this unit

Does anyone see it? It looks like the standard opamp based circuit

 

[xaxxop]

GK400RB - 1987 vintage

Cheers,
Duff2

wow, more photos for clone please

 

[svtb15]

Im still trying to find one of these in good enough condition... Just used an BF bassman thru a Loco cab on a rock recording and it was great.... neither piece was mine, ,it belonged to the producer...

Darkhorse, if you ever want to sell that amp, email me me first..

Here you go -

And the "art shot" -

 

[GearHeadBassMan]

here's one of my new Carvin BX-500:

zexy!

 

[TerenceSharp]

oooh, never posted the ones from the other thread.

Gallien kruger backline 600 (Taiwan made? says on back)

 

[808man]

yum! yum!
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[Brim]

Eden WT550

 

[disssa]

Forge AXB Bass Tube PreAmp

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[duff2]

Ampeg SVP-PRO

 

[disssa]

@duff2
Cool, that was my amp... This picture was taken by me: Invalid Link Removed

 

[disssa]

Warwick Quadruplet PreAmp

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