Purple Plexi 800 Vero Build ?

HOTTUBES · May 25, 2013, 12:34:18 PM

Has anyone built this vero before ?
Is it Verified ? ( I'm assuming it is ... )

I built this , but i can't get it to work for some reason , I've check everything about 10 times ... but no Dice !
Won't pass audio at all , no sound ! tried different op amp too .
By Pass does work ...

HOTTUBES · May 25, 2013, 07:03:07 PM

Is VOL 2 out ?
Again i assume so , as it's not mentioned on the layout .

rousejeremy · May 25, 2013, 08:04:08 PM

I've built that, it does work. Vol.2 is out.

HOTTUBES · May 25, 2013, 09:15:31 PM

Thanks Jeremy !!

HOTTUBES · May 25, 2013, 09:18:19 PM

I forgot to tie in the grounds at pins 2 & 4 of the op amp as shown in the layout ....

Now i get some sound , but it's pure white noise .... HSSSSSSSSSSSS !!!

( scratches head )

mth5044 · May 25, 2013, 09:38:25 PM

Voltages may be useful. Also a schematic.

HOTTUBES · May 25, 2013, 11:41:49 PM

Quote from: mth5044 on May 25, 2013, 09:38:25 PM
Voltages may be useful. Also a schematic.

yes , good call !!!

Here they are ....

Battery Voltage = 8.37

1= 1.326 8= 1.382
2= 0 7= 4.106
3= 0 6= 8.301
4= 0 5= 5.210

The vero layout is the one shown above ...

rousejeremy · May 26, 2013, 01:27:42 PM

Do you have any pics of of your board?

HOTTUBES · May 26, 2013, 01:54:45 PM

Looks like a " Dogs Breakfast " !!! sorry !

HOTTUBES · May 26, 2013, 02:00:20 PM

I have checked the board for solder bridges visually and with DMM .
I check and meter every component before its installed in the board , so i know all values are proper .
I have check all components are in their proper locations & orientations
I have tried a new op amp .
Unsoldered each pot , and swept the pots on the DMM to verify their operation .
Verified DC power on the circuit board
Verified all off board wiring to be correct to the layout .
Verified all cuts to the vero are correct to the layout .

HOTTUBES · May 26, 2013, 02:02:28 PM

Thanks for any help !

rousejeremy · May 26, 2013, 02:07:07 PM

What is the value of the two resistors you have wired in series for R7?

rousejeremy · May 26, 2013, 02:10:22 PM

And where is the wire going to the "in" on the vero? (second strip from the top, second hole from the top)

HOTTUBES · May 26, 2013, 02:20:50 PM

Quote from: rousejeremy on May 26, 2013, 02:07:07 PM
What is the value of the two resistors you have wired in series for R7?

I had unsolderd it last night and checked it to be 1.82 K cause i had thought the same as you ... ha !

HOTTUBES · May 26, 2013, 02:23:07 PM

Quote from: rousejeremy on May 26, 2013, 02:10:22 PM
And where is the wire going to the "in" on the vero? (second strip from the top, second hole from the top)

" IN " on the board comes from the stomp switch . ( it's a purple wire , it's hard to see )

HOTTUBES · May 26, 2013, 02:25:10 PM

Heah !!!! come to think of it .... I have the INPUT on the wrong Srtip !!

I have the Guitar signal going to ground !! DOH !!!!!!!!!!!!!!!!!!!!!!

( Trashes the room !!!)

rousejeremy · May 26, 2013, 02:27:30 PM

That's awesome.

rousejeremy · May 26, 2013, 02:28:23 PM

Make sure to ground that top strip.

HOTTUBES · May 26, 2013, 02:35:06 PM

Thanks Jeremy !!

HOTTUBES · May 26, 2013, 02:36:38 PM

Quote from: rousejeremy on May 26, 2013, 02:28:23 PM
Make sure to ground that top strip.

Yep , it is ..... the jumper that runs under the op amp takes care of that ....

Thanks again .....

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Purple Plexi 800 Vero Build ?