Author Topic: "It Might Get Loud" Pages Tonebender?  (Read 42625 times)

mac

Re: "It Might Get Loud" Pages Tonebender?
« Reply #80 on: May 15, 2014, 06:50:32 AM »
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Anyone ever tried MPSA42's for these fuzz effects? They have pretty low Hfe and are really common out there.

I'm using them when I need low gain or high voltage. They are cheap and hfe is in the 100-150 range.

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In my experience, low leakage is not preferable in Q2 and Q3 is certainly not looking to be 4.5V. You want 8+ volts at Q3.

If you want 8v at Q3, I guess +100ua can do it.
Salt and pepper to taste! :)

mac
mac@mac-pc:~$ sudo apt-get install ECC83 EL84

Electric Warrior

Re: "It Might Get Loud" Pages Tonebender?
« Reply #81 on: May 15, 2014, 09:02:19 AM »
You can go way beyond 300ľA without any issues. In fact I can't make my clone sound anything like my vintage unit with low leakage transistors.

Here's some voltages I measured in the vintage unit:

Battery: -9.67V

Q1 C -9.02 B -0.03 E 0
Q2 C -0.17 B -0.08 E 0
Q3 C -8.44 B -0.17 E -0.11

Arcane Analog

Re: "It Might Get Loud" Pages Tonebender?
« Reply #82 on: May 15, 2014, 11:36:08 PM »

Quote
In my experience, low leakage is not preferable in Q2 and Q3 is certainly not looking to be 4.5V. You want 8+ volts at Q3.

If you want 8v at Q3, I guess +100ua can do it.
Salt and pepper to taste! :)

mac

If you want it to sound like a MKII you want 8V+ at Q3. The 4.5V at Q3 in the MKII circuit is not correct - unless all of the original units had it wrong.