Need Help With FL301 Build / Debug

[Zben3129]

Happy 2009 everyone,

Tried to build the FL301 from tonepad, and it isn't working. When engaged I get a weak, clean signal through, accompanied by loud! hum. When I take out the mn3007, the hum gets quieter, but is still present. Also, the regulator (A TO-220 package, 1A) is heating up. Not too hot that I can't touch it, but it is generating heat. I can't see any glaring issues with the Voltages:

IC101:
1 - 6v
2 - 6
3 - 4.1
4 - 0
5 - 6
6 - 6
7 - 6
8 - 11.8

IC102
1 - 6v
2 - 6
3 - 6
4 - 0
5 - 6
6 - 6
7 - 6
8 - 11.8

IC105
1 - Var between 2 and 8v
2 - 5.3
3 - Var between 5 and 6.3v
4 - 0
5 - 5.8
6 - 5.8
7 - Var between 5 and 6v
8 - 11.8v

MN3007
1 - 11.8v
2 - 6
3 - 1.07
4 - 0.8
5 - 0
6 - 6
7 - 3.1
8 - 3.1

MN3101
1 - 11.8v
2 - 6
3 - 0
4 - 6
5 - 9.5
6 - 2.3
7 -7.9
8 - 0.8




Also, is Q106 definitely PNP? Looks like NPN on the schematic.
Is Q107b definitely NPN? Looks like PNP on the schematic.

Subbed 4558s for all the tl022s

Thanks

Zach

[PerroGrande]

Q107 looks to me like an NPN for certain.  The emitters are grounded and the collectors run off to the positive supply.

Q106 is a bit odd.  The schematic drawing *does* look like an NPN, but everything about the way it is connected says PNP... Emitter tied to the positive supply, etc...  yeah -- looks like a PNP in spite of the drawing.

[Zben3129]

Thats what I figured, they didn't seem like they would function the way the schematic seems to show them. I wish there was a good version of that somewhere, without the switching junk 

Zach

[Zben3129]

Hmm... with my meter set to continuity, it shows continuity with a reading of "1322" (ohms?) and beeps, but once I apply power it stops beeping and shows the symbol for no continuity. I have a feeling this points to something specific, perhaps a cap?

Zach

[Andre]

Q106 is a PNP for sure. The schematic says Q106 is a 2SA1015 which is a PNP transistor.

This goes for all japanese transistors:
2SAxxxx and 2SBxxxx are always PNP
2SCxxxx and 2SDxxxx are always NPN

André