Guitar amp schematic for PPP EL84

Charles Wasserf · 3rd January 2010, 11:16 AM

Hi all,

Can someone suggest a good schematic for blues and rock. My friend and I have stripped his old Miazzi which he says never worked properly . We have salvaged the transformers and 4 X ECC83, 4 X EL84 and 2 X EZ81.

He wants to be able to overdrive the amp into distortion but have a volume pot later to control the final output. Would also like to stay with PPP EL84 and requires tone control for bass, mids and tops.

Regards
Charles

dowdylama · 3rd January 2010, 03:45 PM

Try searching through some of the 36 Watt schematics posted at:

18 Watt Community Center

Charles Wasserf · 4th January 2010, 10:19 AM

thanks dowdylama,

have just registered with 18watt and waiting for activation

dowdylama · 4th January 2010, 02:18 PM

It's hard to beat their 36 Watt design with the EF86 in the V1 position!

Jim

Brit01 · 4th January 2010, 03:05 PM

How much distortion does this design offer?

I'm looking for a design that will create 'Pantera' like distortion.

Maybe a pre-amp to use as a headphone amp to begin with.

I have various 12... tubes. a nice matched quad 12AX7 is just waiting to be plugged in

any suggestions?

dowdylama · 4th January 2010, 04:16 PM

The EF86/36 Watt design is one of my very favorite guitar amps.
It has a late-60s British sound...'though it's probably NOT the best for Pantera distortion.

Jim

Test Electrix · 5th January 2010, 07:01 PM

Pantera's guitarist (the late Dimebag Darrell) used solid state amps made by Randall (I think it was a 'Warhead') and a Dean Razorback to play through it. He also had his own custom humbuckers,the Dimebucker (my mate had one in his guitar and it gives a solid slab of shunt, no definition whatsoever - just hi-gain ceramic shunt!).
The Marshall Mode 4 is the only other solid state I know of with any kind of prominence (and I don't know of anyone that uses one).
The best way to approximate his tone would be just use transistors and diodes in the pre-amp and MAYBE MOS-Fets in the poweramp.

On the original topic the Miazzi looks like it could be re-worked in to a higher gain Vox AC30...

3rd January 2010, 11:16 AM	#1
Charles Wasserf diyAudio Member Join Date: Mar 2005 Location: durban	Guitar amp schematic for PPP EL84 Hi all, Can someone suggest a good schematic for blues and rock. My friend and I have stripped his old Miazzi which he says never worked properly . We have salvaged the transformers and 4 X ECC83, 4 X EL84 and 2 X EZ81. He wants to be able to overdrive the amp into distortion but have a volume pot later to control the final output. Would also like to stay with PPP EL84 and requires tone control for bass, mids and tops. Regards Charles

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3rd January 2010, 03:45 PM	#2
dowdylama diyAudio Member Join Date: Mar 2005 Location: western North Carolina	Try searching through some of the 36 Watt schematics posted at: 18 Watt Community Center

4th January 2010, 10:19 AM	#3
Charles Wasserf diyAudio Member Join Date: Mar 2005 Location: durban	thanks dowdylama, have just registered with 18watt and waiting for activation

4th January 2010, 02:18 PM	#4
dowdylama diyAudio Member Join Date: Mar 2005 Location: western North Carolina	It's hard to beat their 36 Watt design with the EF86 in the V1 position! Jim

4th January 2010, 03:05 PM	#5
Brit01 diyAudio Member Join Date: Jul 2008	How much distortion does this design offer? I'm looking for a design that will create 'Pantera' like distortion. Maybe a pre-amp to use as a headphone amp to begin with. I have various 12... tubes. a nice matched quad 12AX7 is just waiting to be plugged in any suggestions?

4th January 2010, 04:16 PM	#6
dowdylama diyAudio Member Join Date: Mar 2005 Location: western North Carolina	The EF86/36 Watt design is one of my very favorite guitar amps. It has a late-60s British sound...'though it's probably NOT the best for Pantera distortion. Jim

5th January 2010, 07:01 PM	#7
Test Electrix diyAudio Member Join Date: Mar 2009	Pantera's guitarist (the late Dimebag Darrell) used solid state amps made by Randall (I think it was a 'Warhead') and a Dean Razorback to play through it. He also had his own custom humbuckers,the Dimebucker (my mate had one in his guitar and it gives a solid slab of shunt, no definition whatsoever - just hi-gain ceramic shunt!). The Marshall Mode 4 is the only other solid state I know of with any kind of prominence (and I don't know of anyone that uses one). The best way to approximate his tone would be just use transistors and diodes in the pre-amp and MAYBE MOS-Fets in the poweramp. On the original topic the Miazzi looks like it could be re-worked in to a higher gain Vox AC30...

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