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30W Class A Superbass/Model T (rebuild content) 
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I'm rebuilding my Shiva/Hotcat 30 into a superbass/model t-esque beast. 2xEL34@380VDC/4k primary, cathode biased to be pretty much class A. It's not run as hot as the hot cat 30 as those things eat tubes like a motherfucker. It'll hit around 50/55W wide open given how the shive pre performed.

The idea of this is that it will make for a good pedal platform to record with using my captor and it can get dirty all on its own if I push the master.

Once I've adjusted the pre in to taste I'll rebuild the power supply and power amp as I've never been too happy with it.

Initial mods will be; a switch to adjust the bass cut on the bright channel (22n/3n3) so I can get a bright black metal tone; and another switch to add in the model t 4µ7 bypass cap to the 3rd (or 2nd, depending on how you look at it) stage to get it nice and fuzzy. I think the real trick here will be getting the preamp voltage just right.

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Progress today was mainly removing the old turret boards and drilling the chassis to take some of the valve wizards new preamp boards. They are really quite nice to work with. Not as versatile as making your own turret board of course, but a hell of a lot less effort and this is a simple build.


Sun Nov 26, 2017 7:54 am
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Interesting. that sounds like a great project. Would love to hear it when its finished.

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Sun Nov 26, 2017 8:01 am
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Model T? Adjustable bias? LOVE IT!!! :fap:

Now I see why you started off with such a large chassis!!! :cool:
Looks like you have room for a spring reverb circuit!

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Walt wrote:
But when the hour is nigh, and the lights are low, and I got a little toothpick of a shwag joint in my teeth, and my friends want to hear me play "Into the Void", or "TNT", "or "Cemetery Gates"...I plug my 600 dollar guitar into my 150 dollar amp, and I am a Rawk gawd.


Sun Nov 26, 2017 9:29 am
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It's going to fall somewhere between a T and a superbass in the end. They're more or less the same with just a few little differences, other than the poweramp. This will be cathode biased and not adjustable. This will mean the poweramp is a bit mushier and looser. I can always convert to fixed if I don't like it.

Heh, this is a different chassis to my last build. This one has sides for a start ;)


Sun Nov 26, 2017 9:59 am
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:lol:

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EVH Wolfgang Special. Katana 100 head + matching 2x12
Winner of the 'Super Fuzz' in Ajax' 10k contest
Leather strap and some picks.
bottle o'bourbon and your daughter's panties


Sun Nov 26, 2017 10:03 am
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Zozobra wrote:
It's going to fall somewhere between a T and a superbass in the end. They're more or less the same with just a few little differences, other than the poweramp. This will be cathode biased and not adjustable. This will mean the poweramp is a bit mushier and looser. I can always convert to fixed if I don't like it.

Heh, this is a different chassis to my last build. This one has sides for a start ;)



Ah, I misread, "Initial mods will be; a switch to adjust the bass cut" as "Initial mods will be; a switch to adjust the bias" That's what happens when I try to speed read. :facepalm:

Looking forward to hearing about the progress. :thu:

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Walt wrote:
But when the hour is nigh, and the lights are low, and I got a little toothpick of a shwag joint in my teeth, and my friends want to hear me play "Into the Void", or "TNT", "or "Cemetery Gates"...I plug my 600 dollar guitar into my 150 dollar amp, and I am a Rawk gawd.


Sun Nov 26, 2017 11:18 am
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Made a bit of progress with this tonight.


Tue Dec 05, 2017 12:10 pm
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bit by piece by bit :cool:

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EVH Wolfgang Special. Katana 100 head + matching 2x12
Winner of the 'Super Fuzz' in Ajax' 10k contest
Leather strap and some picks.
bottle o'bourbon and your daughter's panties


Tue Dec 05, 2017 12:20 pm
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PI board populated. Time to start adding some wires to this motherfucker.

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Wed Dec 06, 2017 12:35 pm
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Input board wired up.

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Thu Dec 07, 2017 12:10 pm
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Why is it so friggin big??? (TWSS)

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Fri Dec 08, 2017 1:20 pm
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But for him it's for reallzzz. everyone knows UK dick is thick :cop:

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EVH Wolfgang Special. Katana 100 head + matching 2x12
Winner of the 'Super Fuzz' in Ajax' 10k contest
Leather strap and some picks.
bottle o'bourbon and your daughter's panties


Fri Dec 08, 2017 4:26 pm
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Post server move repost:

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TS and board interlinks wired up. Just the PI and power to wire up and we're good to flip the switch. I do want to rebuild the power supply and power amp at some point soon as I'm not entirely happy with it.

We just need ajax to post the fap emoji and we're back to where we were ;)


Tue Dec 12, 2017 3:45 pm
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Just the power to hook up and then I can test/play :fap:


Thu Dec 14, 2017 12:01 pm
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definitely :fap: :fap: :fap:

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EVH Wolfgang Special. Katana 100 head + matching 2x12
Winner of the 'Super Fuzz' in Ajax' 10k contest
Leather strap and some picks.
bottle o'bourbon and your daughter's panties


Thu Dec 14, 2017 12:06 pm
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Did someone request a fap emoji? The pleasure is all mine! :fap: :fap: :fap: :fap: :fap:

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Walt wrote:
But when the hour is nigh, and the lights are low, and I got a little toothpick of a shwag joint in my teeth, and my friends want to hear me play "Into the Void", or "TNT", "or "Cemetery Gates"...I plug my 600 dollar guitar into my 150 dollar amp, and I am a Rawk gawd.


Thu Dec 14, 2017 12:10 pm
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:eek:
I soooo wanna be a piece that piece of clay right now :evil:

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EVH Wolfgang Special. Katana 100 head + matching 2x12
Winner of the 'Super Fuzz' in Ajax' 10k contest
Leather strap and some picks.
bottle o'bourbon and your daughter's panties


Thu Dec 14, 2017 7:39 pm
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Everything but the NFB wired up, which I usually do after the first testing as it will scream like a banshee if the OT polarity is wrong. This is ready to test tomorrow!


Fri Dec 29, 2017 6:05 am
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so where do you get those PCBs? really neat idea for builds.


Fri Dec 29, 2017 6:18 am
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From the valve wizard/Merlin Blencowe. He does a full amp set so everything can be done with them. They're cheap too:
http://www.valvewizard.co.uk/universalpcbs.html


Fri Dec 29, 2017 6:20 am
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Zozobra wrote:
From the valve wizard/Merlin Blencowe. He does a full amp set so everything can be done with them. They're cheap too:
http://www.valvewizard.co.uk/universalpcbs.html



sweet... I'll have to take a look.... seems simple enough even I could build an amp without killing myself lol


Fri Dec 29, 2017 6:29 am
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They're pretty easy to work with. I made a preamp/ecc99 mini amp using some with a ZVD DC-DC boost converter for the supply, powered by a laptop charger.


Fri Dec 29, 2017 8:22 am
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Powered up. Voltages look sensible and it sounds about right. I have a bad treble pot to replace but it's otherwise good to go.


Fri Dec 29, 2017 9:52 am
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Congrats on the successful power up! :thu:

Can't wait to hear some clips!!!

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1969 Sunn Solarus ● 2x 1980's Randall RG-80 ● 2013 Hi-Tone HT103-DG (Winner Best Rig 2014) ● 2015 Mortatone 12/15 Cab w/EV SRO's ● 2017 Jubilee ● Incoming Ceriatone Model Tee
Walt wrote:
But when the hour is nigh, and the lights are low, and I got a little toothpick of a shwag joint in my teeth, and my friends want to hear me play "Into the Void", or "TNT", "or "Cemetery Gates"...I plug my 600 dollar guitar into my 150 dollar amp, and I am a Rawk gawd.


Fri Dec 29, 2017 11:28 am
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Changed the preamp from a split cathode superleady type thing to straight up superbass. I also dropped the NFB resistor a little and it looks like I have the OT leads reversed so I have a positive loop and not a negative one so it sounded like ass. I'll swap those over tonight and then this is ready to live in its headbox until I decide I want to rewire the power amp/PSU.


Fri Jan 12, 2018 7:39 am
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clips or it's just a gorilla

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EVH Wolfgang Special. Katana 100 head + matching 2x12
Winner of the 'Super Fuzz' in Ajax' 10k contest
Leather strap and some picks.
bottle o'bourbon and your daughter's panties


Fri Jan 12, 2018 7:48 am
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It's not quite ready for clips yet but there will be clips when it is ;)


Fri Jan 12, 2018 7:58 am
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All issues resolved. Considering adding a fixed depth mod to it before I button it up. Clips this weekend.


Fri Jan 12, 2018 11:40 am
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When you make a clip, crank it up and do some major bar chords, please?

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1969 Sunn Solarus ● 2x 1980's Randall RG-80 ● 2013 Hi-Tone HT103-DG (Winner Best Rig 2014) ● 2015 Mortatone 12/15 Cab w/EV SRO's ● 2017 Jubilee ● Incoming Ceriatone Model Tee
Walt wrote:
But when the hour is nigh, and the lights are low, and I got a little toothpick of a shwag joint in my teeth, and my friends want to hear me play "Into the Void", or "TNT", "or "Cemetery Gates"...I plug my 600 dollar guitar into my 150 dollar amp, and I am a Rawk gawd.


Fri Jan 12, 2018 1:26 pm
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Zozobra wrote:
All issues resolved. Considering adding a fixed depth mod to it before I button it up. Clips this weekend.


'grats on the fixes.
What freqs are you 'fixing' the depth mod to? Without hearing a before/after I wouldn't even know one way or the other. :lol:
Just wondering is all.

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EVH Wolfgang Special. Katana 100 head + matching 2x12
Winner of the 'Super Fuzz' in Ajax' 10k contest
Leather strap and some picks.
bottle o'bourbon and your daughter's panties


Fri Jan 12, 2018 1:40 pm
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This is relevant to my interests. :love:


Fri Jan 12, 2018 2:06 pm
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Just had a quick blast through my go to eyehategod riff for dank tones assessment.

Destroyer with lace heshers > Joyo US Dream (riot clone) > 30W SB > Captor >WoS


Sat Jan 13, 2018 5:45 am
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Sat Jan 13, 2018 7:18 am
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ajaxlepinski wrote:
When you make a clip, crank it up and do some major bar chords, please?


here you go:



This is all controls dimed with a tele neck p90 ;)


Sat Jan 13, 2018 9:14 am
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Zozobra wrote:
ajaxlepinski wrote:
When you make a clip, crank it up and do some major bar chords, please?


here you go:



This is all controls dimed with a tele neck p90 ;)



Sounds like heaven on earth! :rawk:

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1969 Sunn Solarus ● 2x 1980's Randall RG-80 ● 2013 Hi-Tone HT103-DG (Winner Best Rig 2014) ● 2015 Mortatone 12/15 Cab w/EV SRO's ● 2017 Jubilee ● Incoming Ceriatone Model Tee
Walt wrote:
But when the hour is nigh, and the lights are low, and I got a little toothpick of a shwag joint in my teeth, and my friends want to hear me play "Into the Void", or "TNT", "or "Cemetery Gates"...I plug my 600 dollar guitar into my 150 dollar amp, and I am a Rawk gawd.


Sat Jan 13, 2018 10:52 am
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phpBB [video]


My first attempt at a reamp.


Tue Jan 16, 2018 12:10 pm
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Le fin.

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Sat Feb 10, 2018 6:38 am
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