MFNAKD... C3 SLO-100 minus 50

The power supply tests I did earlier today seem to be OK. I submitted my results and I'm waiting on confirmation from Rob of C3 Amps. I'm estimating that after all the other stuff is installed including the tubes, the plate voltages hitting the pair of 5881 power tubes will be around 475vdc. This build is got a long ways to go yet! Steady As She Goes...

 
ivan H said:
Good to see progress on this. Hopefully the power supply test results are confirmed to be good.
Do you have a cabinet/speaker type in mind for this amp?? Cheers
Click to expand...
Progress? Yes, but little by little. If I can't find a good chunk of time in a day to devote to this build, I'll just put it off for the next day.

Test results? Yes, the results are within spec according to Rob.... :woohoo:

Cabinet/speaker? What I have in my inventory is a 1x12 open/close pine cab with a Scumback M75 (65 watts), and a oversized 2x12 cab by Avatar with a Celestion 12H-30 70th Anniversary and a (Chinese) Vintage 30. I also like to run my amp heads into the speakers of my old JCM800 2x12 combo with a pair of Scumback M75s.
 
I got to spend a few hours on this today. Basically installing the rest of the rear components and most of their wiring, plus connecting the output tranny's wiring.
March 7 2021 (2).JPG

Silly doodads we'll do for these amps. This here will be the resistor assembly that connects between the Slave Level control and the Impedance selector:
March 7 2021 (3).JPG

Speaker jacks, impedance selector, slave out jack with slave level control, and footswitch jack for channel switching:
March 7 Rear Controls (7).JPG


Power tube grid stoppers with heat shrink and Soldano style resistor lead fanciness:
March 7 2021 (5).JPG

I'm hoping that the yellow theme is for added Mojo... :fingersx:
March 7 2021 (7).JPG

Organized chaos:
March 7 Rear Controls (8).JPG

Next phase will be finalizing all the front controls before the preamp board is installed and connected.
 
In regards to my Pomeranian super-puppy... About a couple of weeks ago, Sweety, in her quest to find something new to chew on, ended up sampling one of the very thin aluminum heat shields for the preamp tubes that came with this kit.

I love my Sweety:
20210310_200646.jpg

This end of the heat shield looked like a taco. I used the ball end of a ball peen hammer to reshape it:
20210310_194702.jpg

Sweety is got some sharp teeth. There's a couple of teeth marks that go completely through:
20210310_194628.jpg

She's also known as Chew-Chew Sweety... :celebrate:
 
All the front controls are installed and ready for the next phase... :woohoo:

The Soldano style grounding buss bar looks like serious stuff:
March 9 and 11 Front Controls (1).JPG

March 9 and 11 Front Controls (2).JPG


I ain't gonna tell y'all how long it took me to accomplish the next two pics. From left to right: Input jack, Normal/Overdrive switch, Crunch/Clean switch (top), Bright switch, and Normal channel preamp pot:
March 9 and 11 Front Controls (3).JPG


After the Normal pot: Overdrive channel preamp pot, Bass pot, and a hint of the Middle pot:
March 9 and 11 Front Controls (4).JPG


And it all looks like this for now:
March 9 and 11 Front Controls (5).JPG


Next phase is to install the preamp board and make about a zillion connections. After that, it'll be a Flip Da Switch Rally... :fingersx:
 
syscokid said:
All the front controls are installed and ready for the next phase... :woohoo:

The Soldano style grounding buss bar looks like serious stuff:
View attachment 61051

View attachment 61052


I ain't gonna tell y'all how long it took me to accomplish the next two pics. From left to right: Input jack, Normal/Overdrive switch, Crunch/Clean switch (top), Bright switch, and Normal channel preamp pot:
View attachment 61053


After the Normal pot: Overdrive channel preamp pot, Bass pot, and a hint of the Middle pot:
View attachment 61054


And it all looks like this for now:
View attachment 61055


Next phase is to install the preamp board and make about a zillion connections. After that, it'll be a Flip Da Switch Rally... :fingersx:
Click to expand...



You need to teach Adrian your soldering techniques , I am sure he would be happy to learn.:cool::rolf:
 
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