Purple build

[Mikey]

on q1 does charge  or emitter go to c4

[Mikey]

Purp build  not purple

[Playsforfun]

Google, my friend.

[Barry]

The little Tip on the silkscreen is always the Emitter, Base is the center, and Collector is the other side.

[Mikey]

Ok thank you  guys. Whole new set of issues now on this build. So I  am daisy chaining the tone tweak  into  the purp I get no signal  from the tone tweak  but I  do get signal from the purp but gives the opposite effect. It cuts instead of  bosts I also modded  the grit with a A10k potentiometer instead  of  the  trim 10k. The transistor I used is an A92 it read 137 hfe on my mm. Not sure if that is the issue  or not but just trying  to figure  it  out I have power  to everything  and I  have tested  for continuity to both boards. But that’s as far as I  got.

Here’s a pic of  the  build.

[Playsforfun]

You may be going a little too fast, Mickey. Lets start with two working boards before combining them. I don’t see anything wrong but I can’t see much from your photo. You may need to start a build support thread.

[Mikey]

Ok well I  will un solder the breakouts and start with the purp

[Barry]

Earlier I mentioned that the Emitter is always the pad near the Tip (or Tab) on the silkscreen

When I looked up a datasheet for an A92 transistor (see below) it shows that you have the Collector side soldered to the pad with the Tip aka the Emitter. So it would appear that the transistor is in upside down.

[Mikey]

 

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Thank you  sir I  unsoldered it from the other board  to further  test but haven’t  got much further  I will  reverse that next and see where that takes me.

[Mikey]

Ok so reversed  and changed out the A92 to n3906 and actually  the pin out for the 3906 is the same as the A92 so with  doing that the purp  side is fixed. But started working on  the tone tweak  board and I have tried to test everything  with volts and continuity. Found I didn’t  have volt passing through  R1 and R12 so lifted one leg to test each couldn’t  get a reading  so replaced both. I THEN did my bench amp testing  and I have through signal but as soon  as I  hit the switch  I get nothing still. I AM at a loss now.  Lol thank you for any help.

[Playsforfun]

OK great. So the PURP is good to go. I would suggest starting a support thread for the Tone TwEQ complete with all the clear photos and voltages that we like and we can help figure it out.

[Mikey]

I will  do that. But right now I have another side project.  Going its hunting season here and I  process game on the side and had a elk brought to me so it’ll be  a  few days before I  get to it. Thanks for the help so far.

[Author]

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