Hi everyone and especially you vintage Marshall experts!
I'm lucky to have two old 50-watt Marshall heads: a '67 JMP plexi 1986 bass model and a '71 JMP aluminium panel (1985 to 1986 conversion). I'm interested in knowing how original these babies are, so I really appreciate it if you can help me out even the slightest bit.
The '67 JMP doesn't have the original logo, unfortunately. (Please sell me one if you have!) Other than that it looks pretty good to me, but I hope you experts can tell me more about it.
Here are some detailed pics of the '67: Dropbox - Photos - Simplify your life
The '71 JMP head started its life as a 1985 model PA head. Other than having been converted to a 1986 bass specs and at least partially recapped, how original is it in your opinion? For what I know, the voltage and impedance selectors have been hard-wired by the previous owner to 230V, 8ohm jack and 16ohm jack, but I do have the original "window style" selectors so those can be restored easily if needed. Also the mains socket has been replaced with an IEC type for easier connectivity - I do have a Bulgin socket at hand though.
Here are some detailed pics of the '71: Dropbox - Photos - Simplify your life
I have a question regarding a couple of capacitors inside the '71: the original Hunts 8uF (or were they already 10uF in 1971?) electrolytic caps have been replaced with newer 10uF ones. Is it worth the trouble to replace them with period-correct NOS Hunts/Erie caps now that they still are available on eBay for a few bucks? Also the channel mixer has a brown disc capacitor now. What brand are those red caps in the circuitry and is it possible to find those anywhere? The mixer bypass cap is something I'd probably like to replace with a "red one". Or then again... is it worth the trouble either?
Then of course one thing... I'm definitely not planning on selling either one, but still... how much would one get for these nowadays?
Here's a couple of sound clips of the '67 and a Marshall 1960TV cab from around 2003, pre-China Celestion G12M Greenbacks (just random noodling):
http://mp3.jucciz.com/aikuisten_vahvistimet/jmp_lp.mp3
http://mp3.jucciz.com/aikuisten_vahvistimet/jmp_strat.mp3
http://mp3.jucciz.com/aikuisten_vahvistimet/jmp_tele.mp3
Here's a quick sample of the '71 played with a Gibson Les Paul '59 Reissue, boosted with a Legendary Tones Time Machine Boost - the cabinet was actually a Kingsley D32C combo enclosure with 2x Celestion G12H's from '76: http://mp3.jucciz.com/other/jucciz223.mp3
Btw, It's funny how much smoother breakup the '67 JMP has. The '71 is much more aggressive, but I do like both of them. I try to answer questions if you need more info. Thanks to everyone!
- Jucciz -
Finland
I'm lucky to have two old 50-watt Marshall heads: a '67 JMP plexi 1986 bass model and a '71 JMP aluminium panel (1985 to 1986 conversion). I'm interested in knowing how original these babies are, so I really appreciate it if you can help me out even the slightest bit.
The '67 JMP doesn't have the original logo, unfortunately. (Please sell me one if you have!) Other than that it looks pretty good to me, but I hope you experts can tell me more about it.
Here are some detailed pics of the '67: Dropbox - Photos - Simplify your life
The '71 JMP head started its life as a 1985 model PA head. Other than having been converted to a 1986 bass specs and at least partially recapped, how original is it in your opinion? For what I know, the voltage and impedance selectors have been hard-wired by the previous owner to 230V, 8ohm jack and 16ohm jack, but I do have the original "window style" selectors so those can be restored easily if needed. Also the mains socket has been replaced with an IEC type for easier connectivity - I do have a Bulgin socket at hand though.
Here are some detailed pics of the '71: Dropbox - Photos - Simplify your life
I have a question regarding a couple of capacitors inside the '71: the original Hunts 8uF (or were they already 10uF in 1971?) electrolytic caps have been replaced with newer 10uF ones. Is it worth the trouble to replace them with period-correct NOS Hunts/Erie caps now that they still are available on eBay for a few bucks? Also the channel mixer has a brown disc capacitor now. What brand are those red caps in the circuitry and is it possible to find those anywhere? The mixer bypass cap is something I'd probably like to replace with a "red one". Or then again... is it worth the trouble either?
Then of course one thing... I'm definitely not planning on selling either one, but still... how much would one get for these nowadays?
Here's a couple of sound clips of the '67 and a Marshall 1960TV cab from around 2003, pre-China Celestion G12M Greenbacks (just random noodling):
http://mp3.jucciz.com/aikuisten_vahvistimet/jmp_lp.mp3
http://mp3.jucciz.com/aikuisten_vahvistimet/jmp_strat.mp3
http://mp3.jucciz.com/aikuisten_vahvistimet/jmp_tele.mp3
Here's a quick sample of the '71 played with a Gibson Les Paul '59 Reissue, boosted with a Legendary Tones Time Machine Boost - the cabinet was actually a Kingsley D32C combo enclosure with 2x Celestion G12H's from '76: http://mp3.jucciz.com/other/jucciz223.mp3
Btw, It's funny how much smoother breakup the '67 JMP has. The '71 is much more aggressive, but I do like both of them. I try to answer questions if you need more info. Thanks to everyone!
- Jucciz -
Finland