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Ben Dowdell
Tinkerer
SA
GT Limited V8

Posts: 93
Reg: 07-2005

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Tuesday, October 09, 2007 - 11:15 pm, by:  Ben Dowdell (Ben) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hi All,

This is way off topic here but i know there are several musicians on the forum and i am looking for advice.

I have a Marshall JTM45 reissue all valve amp that i need professionally modified back to original 1960's blueprint specs.

I would like the PCB to be replaced by a point to point handwired turret board using carbon composition resistors in tonally sensitive positions quality carbon film and Metal oxide where stability and heat resistance is required etc.

I would also like the valves to be replaced by original Mullard ECC83s, the rectifier by a Mullard GZ34 and the output valves by genuine GEC KT66s so on and so forth.

So you can see i have some serious mods in mind and to save time i wont add in all the other stuff. Do any of you guys know of anyone preferably in Adelaide who is skilled enough to do these mods?

Do any of you guys have ideas for other mods to get this amp happening. I am looking to achieve an AC DC Bon Scott 1970's era sound. This amp is very similar to what Angus uses so i know it has the potential to become unblanketed in its sound.
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 8456
Reg: 11-2004

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Wednesday, October 10, 2007 - 01:48 am, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Ben, do you have the valves etc?
Mike Bradberry
DieHard
Queensland
V8 UnLimited

Posts: 702
Reg: 07-2005

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Wednesday, October 10, 2007 - 06:10 am, by:  Mike Bradberry (Halflife) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Firstly, sell the Marshall and get a Fender. There are a number of Fenders out there that will probably give you what you want without the hassle of a rebuild.
Ben Dowdell
Tinkerer
SA
GT Limited V8

Posts: 95
Reg: 07-2005

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Wednesday, October 10, 2007 - 10:19 am, by:  Ben Dowdell (Ben) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hi Peter,

No, i dont have the valves yet....

Happy with the marshall thanks Mike although fender build great amps.

All amps and it does not matter what brand will have some amount of tweaking and modifying done to get them up to a professional level.
Peter Nitschke
JunkFilterer
South Australia
GT4.0 V8

Posts: 8459
Reg: 11-2004

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Wednesday, October 10, 2007 - 04:16 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Ben, I have a mate with a huge collection of valves, though he has been selling some off recently.
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 2423
Reg: 03-2006

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Wednesday, October 10, 2007 - 07:13 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Man i'd stick with the marshall for sure.

Im using a VS100R myself! had it almost 10 years with no issues... Used to run a Quad on stage for 7 yrs and it still runs awsome nowadays!

Fender make some awsome amps too... My advice, Never sell an amp, just buy another one. They will never be the same, but there is nothing wrong with loving more than one particular sound :-)

Also depends what guitar your playing through it too:-)
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 2424
Reg: 03-2006

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Wednesday, October 10, 2007 - 07:14 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Checkout the US and UK for bits and pieces too... Always alot of old school music equpiment stuff over there.
Will Schultz
Tinkerer
new south wales
tt

Posts: 23
Reg: 05-2007

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Thursday, October 11, 2007 - 06:31 pm, by:  Will Schultz (Johnny_dangerous) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Daniel Clarke wrote on Wednesday, October 10, 2007 - 07:13 pm:

My advice, Never sell an amp, just buy another one




ha ha.I took that approach with amps and guitars.Ended up with so much stuff.Then stopped playing in bands for a while,lent gear to people and now i have no idea where half of it is!
I never let go of my baby though.1974 Gibson,200w quad box combo.Best old amp i've ever heard and nice and rare!
Ben Dowdell
Tinkerer
SA
GT Limited V8

Posts: 96
Reg: 07-2005

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Monday, October 15, 2007 - 11:58 am, by:  Ben Dowdell (Ben) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Thanks for all that guys.

Peter does he have the valves i mentioned?

original Mullard ECC83s, the rectifier by a Mullard GZ34 and the output valves by genuine GEC KT66s

would be interested to know his price.

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