This is probably the easiest build out there but I seem to have done it again. The unit works - it even sounds trebley but it is about half volume. The level pot takes it from nothing to full boost, but full boost is around half of what I get when I switch it out.
http://www.tonepad.com/getFile.asp?id=83
Changes:
I didn't use any of the Millennium Bypass stuff.
I didn't have a 2N5087 so I used a cheapo 2N5088. Is there a transistor that would give more gain?
I didn't have a 120K resistor so I used 110K for R2. I was going to add a 10K in series but haven't gotten around to it yet.
Voltages:
E=5.5
B=6.1
C=7.6
Thanks.
2N5087 is a PNP transistor
2N5088 is an NPN transistor
If the circuit calls for a PNP transistor then you need to use a PNP. Probably causing your problems ;)
ALWAYS check component datasheets if you are not familiar with it ;D
D'OH! :icon_redface: :icon_redface: :icon_redface: That has to be it. I thought I read somewhere 5087 & 5088's were direct replacements.......
Is 5087 the best transistor for this application?
the best would probably be a germanium, but that layout calls for 2N5087, so if you're going silicon, no reason to screw with a working layout from a good company. of course, you can try any pnp si you have on hand to hear what's best for you. make notes on the C voltage when you're experimenting.
2N5086 2N5087 are similar, both PNP; the '87 bin gets the higher-gain parts. In many circuits, either will work.
2N5088 2N5089 are similar, both NPN; the '89 bin gets the higher-gain parts. In many circuits, either will work.
But you normally can't get a NPN to work in a PNP job.