matamp series 2000

Ghandi · Post by **Ghandi** » 14 Feb 2009, 20:58

http://www.matamp.co.uk/series2000.htm
anybody ever had a look inside one of these amps,
the old one or the reissue?

that was the amp green recorded albatross with...

cheers
ghandi

Ghandi · Post by **Ghandi** » 15 Feb 2009, 00:58

just found this side:
http://picasaweb.google.com/jameshadfield/MATAMP#

Ghandi · Post by **Ghandi** » 07 Dec 2011, 14:54

here it is,
the schematic of the Matamp 2006 Reissue

Cheers
Ghandi

sinner · Post by **sinner** » 07 Dec 2011, 18:08

Nice, thanks, is that yours schemo?

Ghandi · Post by **Ghandi** » 07 Dec 2011, 20:56

sinner wrote:Nice, thanks, is that yours schemo?

I found the GTO schematic online and compared it to my traced Matamp Series 2000 schematic.

the marked values in orange are the differences between the GTO and the Series 2000 I found.

That Amp sounds wonderful and like nothing else, listen to Fleetwood Mac's Studio Albums as that was the Amp Peter Green used!

cheers
Ghandi

sinner · Post by **sinner** » 07 Dec 2011, 21:01

Sexy, any input about voltages, transformers?

jwpartain1 · Post by **jwpartain1** » 08 Dec 2011, 03:51

Is the bit in the middle with the two jacks a simple, passive effects loop? I'm kind of puzzled as to why that's even there. Anyways, really simple circuit. Thanks for sharing Ghandi!

Ghandi · Post by **Ghandi** » 08 Dec 2011, 17:27

Yup,
that is a passive effects loop. mainly used for the fitting Matamp Reverb unit that you can here on Albatross!

The original Matamp Series 2000 Amp used the same Radiospares Deluxe OT and PT as the Marshall JTM.

Nyquist5 · Post by **Nyquist5** » 12 Dec 2011, 12:03

Yep, that's my schematic, visible at nicosonic.com.

This is the schematic of one version only of the GTO/2000. I traced it from pictures but got several other Matamp in for repair after that. The amp's design varies (amongst other things, different phase splitter circuits can be used) but I am glad that you confirm that 680k plate resistor.

Ghandi · Post by **Ghandi** » 13 Dec 2011, 13:46

Hey Nyquist5 cool to meet you here.

The 680K plate resistor is clearly visible.

So now we can finally start to building some Series 2000 inspired amps with some nice radiospares "work alike" trafos and this schematic!
That's just a great amp, pure and simple and it was peter green in every note!
It really does. I build a jfet emulation pedal of that amp and it was pure albatross, with a strat and a les paul!

I'll hopefully get around building it next spring or summer!

Merry Christmas Everybody!

Ghandi

phibes · Post by **phibes** » 14 Dec 2011, 00:18

What rectifier is used?

HENK · Post by **HENK** » 14 Dec 2011, 11:47

Hello Ghandi,
is it possible to post a schematic for the jfet-emulation???
Greets Thilo

Ghandi · Post by **Ghandi** » 14 Dec 2011, 14:25

sorry I didn't made a schematic,
just follow the schematic of the amp, change the plate resistors for trims and adjust the jfet drains to 4,5V.

add a two 15k 2n2 dual low pass filters and a 100k volume pot and you are done.

Dr Tony Balls · Post by **Dr Tony Balls** » 14 Dec 2011, 14:39

phibes wrote:What rectifier is used?

I think its a GZ34

phibes · Post by **phibes** » 14 Dec 2011, 18:16

Dr Tony Balls wrote:
phibes wrote:What rectifier is used?

I think its a GZ34

Grazi. That woulda been my guess.

Nyquist5 · Post by **Nyquist5** » 15 Dec 2011, 13:46

Yes, GZ34. I forgot to mention it on the schematic.
At least on GTO I had in used diode rectification instead of valves. As I said, there are many vairations on the theme.

If you build one, put the effect loop switching jacks the right way round so that you don't run the risk of burning the return triode (the return jack should be switching to ground when nothing is connected). I still don't understand why Matamp connects its jacks that way

.