JTM45 reissue, a few questions.

photek

MtB said:

@photek - do you mean the 36w Ampmaker head? That uses 4 EL84s 

No it was a 45 with 2x KT66 but I can't remember who made it, was a very tidy handwired build by a guy that ran a company making kits. It will come to me no doubt.

zepp76

@ICBM  Sorry to bother you again but could you please run your eyes over these gut shots and comment on wether it's a well modded amp or a keep well clear disaster area? The master volume has been routed through the back like you suggested was better and there has been some modding to the inputs where they have been connected somehow. Many thanks.

https://i.imgur.com/NK9Wywk.png

https://i.imgur.com/oaIJTX9.png

https://i.imgur.com/OypxyNy.png

https://i.imgur.com/aqnnPWx.png

https://i.imgur.com/cUuIIhr.png

ICBM

That looks OK. The inputs appear to have been modded to internally link the two channels - why, I don't know… there's no point when it can be done with one short patch lead externally, but some people seem to like to do stuff like that.

The MV mod isn't great, by the look of it - it will work, but it appears to be a post-tone-stack MV like on a 2203, which isn't as good as a post-phase-inverter type on one of these… without the cascaded channels like the 2203, you don't get a lot of overdrive, and it doesn't sound as much like the power-stage overdrive as the PPIMV does.

So I'd probably like to improve it . At least it doesn't look bodged so it should be possible to fairly easily.

zepp76

Cool, thank you for your input it's much appreciated.

welshboyo

I still regret selling my JTM45 to a certain @lamf68 of this parish - possibly the best classic rock sound I ever had - I remember playing one festival where I had the luxury of playing it wide open for a whole set - the sound was something else and was a true revelation/insight as to how the greats such as Kossoff etc etc got that sound - not that I was anywhere close but the whole interaction between the guitar (LP) and the amp at that volume which wasn't that unmanageable but still brutally loud - I think what makes the JTM a little more manageable is the softer attack of the valve rectifier rather than the hard nosed JMP.

Would love another one...Briliiant amps - could be the the only amp to topple my love for my Shiva!

zepp76

@welshboyo Thank you for that, it's always good hearing other people's opinions of the amp. I've yet to hear a bad thing yet! Hearing all these good things about it is what is keeping me patient and helping me wait for the right one.

welshboyo

zepp76 said:

@welshboyo Thank you for that, it's always good hearing other people's opinions of the amp. I've yet to hear a bad thing yet! Hearing all these good things about it is what is keeping me patient and helping me wait for the right one.

Trouble is now @zepp76 is that I have convinced myself that I need another one too, and there could be a race to the line!!!!

zepp76

welshboyo said:

zepp76 said:

@welshboyo Thank you for that, it's always good hearing other people's opinions of the amp. I've yet to hear a bad thing yet! Hearing all these good things about it is what is keeping me patient and helping me wait for the right one.

Trouble is now @zepp76 is that I have convinced myself that I need another one too, and there could be a race to the line!!!!

@welshboyo  Ha! If you have a car and can travel you have the high ground as I only have motorcycles so need the sellers to courier and that is a hard sell let me tell you, I've missed out on a few now thanks to that.

breadfan

I've also convinced myself that I need one too 

zepp76

breadfan said:

I've also convinced myself that I need one too 

Oh man! it's open season on JTM45's! This could get ugly.

photek

I will be selling my Ceriatone handwired JTM45 soon gents if anyone isn't fussed about getting a Marshall one.

TTBZ

You've got me wanting a JTM45 now haha, all the demos sound awesome and sounds like with a boost it'd do heavier rock styles fine with the channel volumes up (and no doubt attenuated)!

To me the cleans sound better than any fender I've heard, they just sound bland to me whereas these have punch and a little bit of grit. Do these amps have the same feel that the slightly later JMP/800s have? The JMP I get to play fairly regularly has such a nice feel, it's very "soft" and easy to play. Not much low end though, but ungodly loud.

lamf68

welshboyo said:

I still regret selling my JTM45 to a certain @lamf68 of this parish - possibly the best classic rock sound I ever had - I remember playing one festival where I had the luxury of playing it wide open for a whole set - the sound was something else and was a true revelation/insight as to how the greats such as Kossoff etc etc got that sound - not that I was anywhere close but the whole interaction between the guitar (LP) and the amp at that volume which wasn't that unmanageable but still brutally loud - I think what makes the JTM a little more manageable is the softer attack of the valve rectifier rather than the hard nosed JMP.

Would love another one...Briliiant amps - could be the the only amp to topple my love for my Shiva!

And i regret more than anything selling it on, was the best sounding amp I've ever owned, i used a Marshall Power Brake with it and it was immense at low volume, like pub volume...This is probably the only amp I'd buy again. 

longjaw

ICBM said:

zepp76 said:

I have a DSL40C which is a good amp but its no JTM!!

Have you thought about replacing the speaker? It's a Seventy/80, which is a bit… meh. A Creamback 65 or 75 would be a much better choice if you're after a JTM-type sound.

This. I put a creamback 65 in mine and it's improved the tone no end.