ROG May Queen vero layout

[Hanglow]

I did another pot mounted layout, unverified so could some give it a quick look over? fits in standard B box. I've still not tried out the peppermill yet  

schem - http://www.runoffgroove.com/mayqueen.html

slight update


thanks

[Renegadrian]

It seems correct - please write that there is a track cut under R7, it's not that clear. And so there are 9 and not 8.

[Hanglow]

So there is, I missed that one

cheers

[Hanglow]

Slight update and I made it so it is verified - I can't edit the first post, but you might notice that the volume pot is incorrect in that one as is the wiring for the trimmer

used BC548 for Q1 (different orientation to the 2n5088 ) and it works great really like this

used 22N for the filter cap, could probably go up a tad more. It really needs this imo, although I guess it depends on you amp and guitar as well


Here is the verified layout.

[nickbungus]

Hi All

I've just completed this as my first homemade pedal and it works (on second go - my soldering skills were horrendous first time round).

I used the verified vero design.

I haven't cranked it up yet as the kids are in bed but the issue I'm having is I cant get the drain lower than about 7.3v.  Nowhere near the 5.5v suggested.  Which ever way I turn the trim pot from the 12 o'clock position, the drain goes higher.

Being a noobie, does anyone have any suggestions on what may cause this and how I rectify

[GGBB]

Here is the verified layout.

Please be more specific about the trimpot connections. If the trimpot is mounted as shown in the diagram, and the center lug of the trimpot is connected to row b (not clear from the diagram), the circuit is wrong. It would be better to add a cut at b16 than to require lifting the center lug out of row b. You should also add a jumper between b18 and c18 to make the trimpot a variable resistor as required and noted in the diagram. These changes will make the layout much clearer and easier to use. As it is now, there is opportunity for confusion and could be the reason for the troubles that nickbungus is having.

[nickbungus]

Thanks GGBB.  This is most welcome help!  Especially as its my first project.

Going off the diagram here: http://www.electronicspoint.com/attachments/trimming-potentiometer-wire-wound-potentiometer-jpg.4476/

I have lugs 1 and 2 connected to row A and lug 3 connected to C.  As it says lug 2 should be connected to lug 1 or 3.

[GGBB]

The pins on that trimpot are labelled wrong in that diagram - 2 and 3 are swapped. In general, the wiper (center pin/lug) of a pot is always labelled #2. With those kinds of trimmers, the wiper is the lug in the center on the opposite side of the other two.

That explains the behaviour you described. The easiest fix for you is to cut lug 1 completely off, making sure it does not contact either the vero strip or anything else.

[nickbungus]

GGBB, you are a legend and a gentleman for helping me!

I cut the lug, set the trim pot to 12 o'clock and turned it on.  First reading 5.50v on the money!

Thank you so much for your help.

I'm now going to do a PCB version and then onto the May I (a souped up version on the May Queen).

Brilliant.  I'm so grateful.

[GGBB]

Happy to have been able to help. Glad you got it working.