Old amp front and rear ($36 on tard me)
Bass25 front by tubeswell, on Flickr
Old cab by tubeswell, on FlickrJansen Bassman 25 Special
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tubeswell
- Gibson
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Jansen Bassman 25 Special
Converted a crapped out old 1973 Jansen Bassman 25 into a tube amp
Old amp front and rear ($36 on tard me)
Bass25 front by tubeswell, on Flickr
Old cab by tubeswell, on Flickr
Old amp front and rear ($36 on tard me)
Bass25 front by tubeswell, on FlickrOld cab by tubeswell, on Flickr
Last edited by tubeswell on Sun Mar 01, 2015 4:41 am, edited 1 time in total.
He who dies with the most toobs... wins
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tubeswell
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Re: Jansen Bassman 25 Special
New baffle cut - re-used old grille and piping
2 x 12 baffle - reuse old grille & pipe by tubeswell, on Flickr
New baffle rear by tubeswell, on Flickr
2 x 12 baffle - reuse old grille & pipe by tubeswell, on FlickrNew baffle rear by tubeswell, on Flickr
Last edited by tubeswell on Sun Mar 01, 2015 4:39 am, edited 1 time in total.
He who dies with the most toobs... wins
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tubeswell
- Gibson
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Re: Jansen Bassman 25 Special
Cab loaded
Cab finished by tubeswell, on Flickr
Old chassis with new iron (Padgett PT and Heyboer 40W OT)
PT and OT by tubeswell, on Flickr
Chassis pan modded with Iron and sockets on
Iron on by tubeswell, on Flickr
Cab finished by tubeswell, on FlickrOld chassis with new iron (Padgett PT and Heyboer 40W OT)
PT and OT by tubeswell, on FlickrChassis pan modded with Iron and sockets on
Iron on by tubeswell, on Flickr
Last edited by tubeswell on Sun Mar 01, 2015 4:40 am, edited 1 time in total.
He who dies with the most toobs... wins
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tubeswell
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Re: Jansen Bassman 25 Special
Chassis finished (8R/4R impedance switch with parallel output sockets on back. Humdinger pot with c-head knob, Mains and HT fuses)
Chassis finished by tubeswell, on Flickr
Reused old front panel ('Slope' switch is now a mid-hump/scoop selector, 'Boost' is now a raw/tone stack lift. James tone stack, Normal and Hot inputs - can also run as stereo inputs)
Chassis front by tubeswell, on Flickr
Schematic (Cross between a 1-channel tweed pro and a goosed up t-bolt). Can run either 5AR4 or 5U4G with two (cathode-biased) 5881s or 6L6s, or a 5Y3GT with two 6V6s (if the speakers are switched 'up a notch' on the OT).
Blues-Meister Mk II (Pro-bolt) schematic by tubeswell, on Flickr
Chassis finished by tubeswell, on FlickrReused old front panel ('Slope' switch is now a mid-hump/scoop selector, 'Boost' is now a raw/tone stack lift. James tone stack, Normal and Hot inputs - can also run as stereo inputs)
Chassis front by tubeswell, on FlickrSchematic (Cross between a 1-channel tweed pro and a goosed up t-bolt). Can run either 5AR4 or 5U4G with two (cathode-biased) 5881s or 6L6s, or a 5Y3GT with two 6V6s (if the speakers are switched 'up a notch' on the OT).
Blues-Meister Mk II (Pro-bolt) schematic by tubeswell, on FlickrHe who dies with the most toobs... wins
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alanp
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Re: Jansen Bassman 25 Special
Pretty sweet conversion there 
Capt. Black wrote:Call me if you're looking for the sound of a sows ear made from a silk purse with a side of hot bitches and alcohol
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Rog
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Re: Jansen Bassman 25 Special
Wow! That's a real project. Well done, that man!!
He hit a chord that rocked the spinet and disappeared into the infinite ...
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StrummersOfThunder
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tubeswell
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Re: Jansen Bassman 25 Special
Humpty all put together again
Front view (same as before) - note the speaker hole shadow in the grille from the old baffle - tried cleaning this away with dry-cleaning spray but its permanently relic'd.
Front view by tubeswell, on Flickr
But when you look round the back
Back view by tubeswell, on Flickr
Front view (same as before) - note the speaker hole shadow in the grille from the old baffle - tried cleaning this away with dry-cleaning spray but its permanently relic'd.
Front view by tubeswell, on FlickrBut when you look round the back
Back view by tubeswell, on Flickr
Last edited by tubeswell on Sun Mar 08, 2015 8:31 am, edited 1 time in total.
He who dies with the most toobs... wins
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Cdog
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rickenbackerkid
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Vince
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Re: Jansen Bassman 25 Special
What a cool project!
"Vince, have you ever tried playing an expensive bass?" - Polarbear.
"And isn't that the finest acoustic bass guitar feedback solo you've ever heard?" - Billy Moose.
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"And isn't that the finest acoustic bass guitar feedback solo you've ever heard?" - Billy Moose.
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tubeswell
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Re: Jansen Bassman 25 Special
Yeah I bought a box of 30 Sovtek 5U4G from an outfit in Siberia two or three years ago - lifetime supply.fuzziebro wrote:nice job mate! 5U4G's are the goods for rects too...
He who dies with the most toobs... wins
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StrummersOfThunder
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jeremyb
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Re: Jansen Bassman 25 Special
Dig the vertical 2x12, awesome!
Slowy wrote: That's the problem; everything rewarding is just such hard work. Regret takes much less effort.