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Discussion in 'Shock Brother's DIY Amps' started by shortcircuit, Nov 4, 2019.
Cut the blue wire. NO..WAIT..CUT THE RED WIRE!
Man I would love to do point to point, but I get confused too easily.
That looks nice and tidy for a point to point too!
You may ask yourself, "Am I right or am I wrong?"
Are we voting for more hi res pics of shortcircuit amps? I vote yea.
'At's a nice-a spaghetti!
What indeed... I see it but I can't tell what its up to. Cathode follower, tremolo oscillator, surely not a gain stage?!
Put some shrink wrap over it, no one will know.
Heck no! I don't eat babies! It's a sources follower to drive a tone stack. I redid my big amp to a high gain circuit. The old cathode follower is now a gain stage. I'll post the details when I get home tonight.
Properly heatsinked to chassis, I don't see any problem here.
Hey, wait a minute. This is not an amp. This is the bottom of your Smart Blender, isn't it?
You may ask yourself
Here's the full guts.
Again, this is a rework of a build from last year. The only thing this amp has anything to do with an AB763 circuit is the 12AT7 phase inverter. It's center biased, unlike Fender which is biased quite hot. The first stage is a 12AU7 cascode, ripped off from Merlin. I have a bunch of 12AU7's and wanted to find a use for them in a guitar amp. It used to have a regular cathode follower driving the tone stack (ripped off from 5F8-A, but with a 470pF cap for a bit more mids), but I rewired it as an extra gain stage cold clipper going into a hot gain stage à la JCM800. The impedance of the output transformer is 3,300 Ohm, thus, the EL34 power tubes. I should rename the amp to Chimera, or something like that, but I feel keeping a reference to the AB763 circuit will offend more folks.
this is not my beautiful house!
I noticed immediately and thought "I betcha that's a source follower in front of a tone stack".
No shame in that, as all it does is pass the signal on through while protecting the preceding stage from tone-sucking. You can also wire a MOS transistor as a constant-current source to replace that cascode bit, and you've got yerself another triode to abuse!
Love the name, by the way
Nice "NASA" splicing!
For a minute there I was concerned you had introduced evil silicon to a signal path uncorrupted by any sort of non-tube amplification. Good thing there are no effects with semiconductors in them or all our tube amps will sound like Line 6 Spiders Please don't crucify me I built my amp with a switching power supply
I wish it was so...
And you may find yourself....
deep in the guts of a highly modified circuit