Recent content by bherren

So I ended up with a 250kA volume pot, 750kOhm resistor in series, 12AY7 (JJ) V1, 12AX7 (Mullard reissue) V2 and it sounds great. I added a couple of 10V zeners accross the output for safety, and built that new one with higher rating caps (400V for the 245V decoupling, 250 C0G ceramics). It...

I did some measurements with my kid playing (stingray active bass) with all pots to max, I measure 130V peaks on the output ! We are definitely in amp destruction realm. The biggest worry is with treble and volume on max, the cathode output of the cathode follower is basically unimpeded to the...

That's what I said :-) C6 is the gain pot bypass I was talking about. Note that it doesn't actually cut anything in this circuit, it bypasses the gain pot. ie it allows those high frequency to pass through at full gain regardless of the pot position, while lower frequencies go through the...

I was going to just add a switch over the gain pot bypass cap to so bright vs normal, afaik that's the only difference...

A bit overkill no ? :-) there is a spare triode in the bas dude, a bit of creative wiring and a resistor or two added would do the job for impedance I think

Tube grids are resilient :-) also this was with all the pots to max which is probably not a normal use case... Hi from Canberra btw :-)

The measurement might have been in a private message. I did some quick measurements myself yesterday using the scope square wave output (5Vpp with a cap to centre it, 1kHz, so kind of a worst case scenario mimicking a bad fuzz pedal). With all pots to max, not only did we measure something...

That's odd, afaik when bypassed the bassdude is just a wire from input to output. The input impedance of the Lectric is a bit low with afaik 10M//470k//470k but that should only kick in when actually using the dude and might only result in a small attenuation if your dude volume pot is close to...

Hi Folks ! So I got a bassdude kit which I built for my bassist son. He loves the sound of it ! The only small change we did after trying a few different ones is the V1 input tube, which we swapped for a 12AT7. It still crushes at high gain, but seems a bit easier to tame and the kid likes the...

This is actually a concern ... I built the bassdude kit with a 250V cap on the SMPS C1, but I gave the pedal to my son with a 12V supply... I worry C1 is going to pop. I might take the pedal back & swap it for a 400V or 630V rated cap