My Phase 45 problems..

[Fret Wire]

No subbing. A zener is a diode, not a resistor. Should be 4.7v, not 4.1 or 5.1.  Stock build off of tonepad? That means you have a 500k pot (speed) mounted on the outside of the box, and a little 250k trimmer pot soldered directly on the circuit board, correct?

[Michael Allen]

Yes, I know what the zener is, but I see that the purpose is to bring the bias down to a certain voltage...correct? This is possible with resistors so I wondered if it could be done....

Yes I have a 500k speed pot. And no it is not a trimmer. I didn't have a trimmer so I used a regular 250k potentiometer.

Ok, I no longer think the bias is the problem. When I take the second IC out the bias and voltages of the first IC pins are at acceptable values. But here's where it gets crazy..... When I test for continuity between the IC pins, Pins 6 and 7 have continuity with pin 8, not with each other and pin 7 has continuity with pin 1. When I unplug the battery there is no longer continuity between any pins. AHH? EH? No entiendo.....

Any ideas?

Thanks a lot for all the help!!
Michael

[Fret Wire]

Where are you setting the 250k when you take your measurements? Middle is about good.

[RDV]

I think your second IC is in backwards. When in, they should face each other head on. Little Dot to Little Dot.

Regards

RDV

[Michael Allen]

yeah......

I realize that I sound a bit forlorn here, but just to clarify I'm not exactly a beginner. I realize you guys are trying to help (and God knows I appreciate it! ) but when it comes down to the basics, I've got it covered.... I do make mistakes however!

I think I've got a fuzzed out problem somewhere along the line. Also my PCB was pretty scraggly and i might have some itermittent traces. I think i'll start over with a new board...

Thanks,
Michael

[RDV]

I said about the Ic being backwards cause you said you got better voltage on one when you pulled the other out. Let us know how it goes when you make another PCB. I think it will work with the 5.1v zener, but I'd like to know if it doesn't also. I did it the easy way by ordering the PCB.

Regards

RDV