18w Blues Jr upcycle

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M Fowler
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Location: Walcott ND

18w Blues Jr upcycle

Post by M Fowler »

Last year I bought two Fender Blues Jr. empty combo cabs for cheap, no chassis so I had some made to fit.

Punched the chassis for a pair of EL84's and two 12AX7 preamp tubes.
Using Marshall type 18w transformers.

Wired it up today and fired her up just a few minutes ago so will have to wait until tomorrow to power test this amp.

I'm getting my projects done finally.

Mark
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joeboo88
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Re: 18w Blues Jr upcycle

Post by joeboo88 »

looks great Mark.
I noticed you are using a different kind of board turrets, do you like them?
also where do you get your faceplate material?

like Jazz said
Are you doing 1 amp a day, before the end of the year? 8)

Awesome stuff Mark....Have a good holiday....cheers

oh....stock up on the important stuff, booze, transformers etc...
we are supposed to get a blizzard on Christmas day up here
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M Fowler
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Re: 18w Blues Jr upcycle

Post by M Fowler »

I keep a good variety of different boards or material on hand. I found some more insolated stud turrets that have 4-40 bolt in bottom I like to use them for screen/grid resistors on the power tubes, on the V1 grid resistor from input jack or where ever I may have forgotten to put a turret or eyelet.

Before I retired I bought up a bunch of compoents, chassis and transformers plus have been given a lot as well.

I start an amp then get side tracked by local musicians or repairs. I stopped taking in repairs unless they are classic Fender, cool old tube amps or my own amps.

I had two dogs one died several years ago and the last one died recently so I no longer am a caregiver to my old friend so I have more time on my hands.
Keeping busy seems to help my arthritis and nerve pain so I am busy.

The faceplate on this one I designed in Front Panel Designer, it is anodized aluminum milled and some times I order white enfill other times I leave the milling bare so just raw aluminum look.

Mark
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M Fowler
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Re: 18w Blues Jr upcycle

Post by M Fowler »

More photos.
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M Fowler
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Re: 18w Blues Jr upcycle

Post by M Fowler »

The stock Blues jr has side mouting holes in the cab to the stock chassis, well I forgot to add those mounts when I order my chassis.

Used some connector covers from Hammond organ amps, one on each side with steel rivnut for 10-24 bolts. Same for top mounts.

WGS Veteran 30 speaker.

Had to pull old tolex off and flip the back board over since I failed to pay attention which side I should have designed the PT to be on.

Mark
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joeboo88
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Re: 18w Blues Jr upcycle

Post by joeboo88 »

Way to find a solution and it looks great too
dcribbs1412
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Re: 18w Blues Jr upcycle

Post by dcribbs1412 »

Looks great Mark
your builds are always inspiring

D
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M Fowler
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Re: 18w Blues Jr upcycle

Post by M Fowler »

Thanks guys it was a fun project but could have been engineered better.

I have one more recycled combo cab and that one is going to be a pair of 6V6 power tubes in that amp.

Mark
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M Fowler
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Re: 18w Blues Jr upcycle

Post by M Fowler »

330K/330k with 100K/100K/50pf fizz cap in PI 1k5 grid works fine.

Screens had wrong value resistors no wonder it sounded anemic, now 100R/5W.

Need to complete voltage chart.
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