Help me identify a 1979 JMP amp
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jhs5150
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He's been using 2205s for years now. 1987s are killers though.
Dirty-D
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Welcome to the forum! 
I am going to agree with Ray that it's Canadian. I would wager if one was to look inside there would be a seperate little board with a bunch of fuses on it. No 16ohm tap also the red lightning bolts and the weird ohm/mains selectors and the French text on the back are dead giveaways and are not on any other amps from back then that I know of however there are many, many more qualified members that can tell you I'm wrong and lI wouldn't argue with them.Congrats on a kick ass amp! Play it LOUD!
I am going to agree with Ray that it's Canadian. I would wager if one was to look inside there would be a seperate little board with a bunch of fuses on it. No 16ohm tap also the red lightning bolts and the weird ohm/mains selectors and the French text on the back are dead giveaways and are not on any other amps from back then that I know of however there are many, many more qualified members that can tell you I'm wrong and lI wouldn't argue with them.Congrats on a kick ass amp! Play it LOUD!
Dean Swindell
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Canadian ones have no 16 ohm. U.S. do.
turfdoc
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2204 is the model.
Chris-in-LA
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They are both models, but they are different and this amp was called both and it has to be one or the other.
dro
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In 1979 I believe this would be called a 1987. It is Swedish. Hence the voltage and the Swedish speaker sticker over the ohm selector.
villainvomit
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Congrats Sandalf! Talk about a great way to start out 2021. WOW !!
Uncle Fester
Member
Hi!
I am new to this forum. I got this amp for free when I purchased a fender Stratocaster the other day. The original owner had died and it had been in the ladys garage for a couple of years and she was about to throw i t away.
Anyway, can someone help me identify the exact model? Production year is 1979 (serial xxxxxL) but there is no model name on the amp, neither on the fromt or back. Anyone got any suggestions? Cabinet might be a lot newer,
Best regards
Mattias
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Uncle Fester
Member
Take the amp into a tech.
Absolute Critical that the Grid Coupling Caps are inspected and or changed and Also the Filter Caps.
You got this rig for free, so just do it.
A total Service for this amp is $300 usd.
Call several music stores in your area.
You will then know who to take it to.
Otherwise your going to be playing and then POP Zing HUMKMMZ. Amp is dead and your repair bill is $700 or more.
That Drake Tranny, most likely you aint finding a new replacement.
The Tech will verify the Model.
Super Lead has a Presence Control
Super Bass has a Slope Control
Now on a side note:
Your amp Has EH El 34's. This tells me that the amp
may have been serviced within the past several years.
The Blue Caps:
What are the dates on those?
If so have the Tech Clean up the amp, (internal dust and cob webs) This will buy you Peace of Mind.
Absolute Critical that the Grid Coupling Caps are inspected and or changed and Also the Filter Caps.
You got this rig for free, so just do it.
A total Service for this amp is $300 usd.
Call several music stores in your area.
You will then know who to take it to.
Otherwise your going to be playing and then POP Zing HUMKMMZ. Amp is dead and your repair bill is $700 or more.
That Drake Tranny, most likely you aint finding a new replacement.
The Tech will verify the Model.
Super Lead has a Presence Control
Super Bass has a Slope Control
Now on a side note:
Your amp Has EH El 34's. This tells me that the amp
may have been serviced within the past several years.
The Blue Caps:
What are the dates on those?
If so have the Tech Clean up the amp, (internal dust and cob webs) This will buy you Peace of Mind.
Who does random grid coupling cap changes?! How often do they fail?
If you are going to sell it leave it alone, just take lots of photos inside, outside and underneath, also the preamp valve type (ie old or new production).
I agree the Superlead has Presence control but please tell me more about the Superbass slope control and how that works as i would like to learn, but bearing in mind this is a NMV 50w amp?
If you are going to gig with it or play it hard into an attenuator then a proper service by someone who knows what they're looking at and how to get it to work at its best would be very sensible. This may/or may not involve a set of valves, filter and bias caps. The 50uF Daly's are 28th week of 1975 date code, the PT is September 1979 and it is a Swedish model 1987 or 1986.
Open her up and take some pics of the circuit board and the filter caps as this would be very helpful.
If you are going to sell it leave it alone, just take lots of photos inside, outside and underneath, also the preamp valve type (ie old or new production).
I agree the Superlead has Presence control but please tell me more about the Superbass slope control and how that works as i would like to learn, but bearing in mind this is a NMV 50w amp?
If you are going to gig with it or play it hard into an attenuator then a proper service by someone who knows what they're looking at and how to get it to work at its best would be very sensible. This may/or may not involve a set of valves, filter and bias caps. The 50uF Daly's are 28th week of 1975 date code, the PT is September 1979 and it is a Swedish model 1987 or 1986.
Open her up and take some pics of the circuit board and the filter caps as this would be very helpful.
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