aquaboy 2012 tech help

[DB_1973]

I built a aquaboy 2012 ver. board from haberdasher. Which is fine work.

  I got the delay working fine, but I am having an issue with the feedback pot. If I dial it past 1\4 to 1\3 of the way up i get a very unusable delay. By halfway up, it runs away after playing a note. And over half way it will take off with out even playing a note.

  I am thinking of trying a lower value pot but just wanted to get some input to see if there is something else i may be missing before i alter the circuit.

   I have built a v3205 ver. all other values are verbatim of the BOM.

Any input would be appreciated,
Thanks
Darin

[jimilee]

Are the resistor values correct,sounds a bit low somewhere

[DB_1973]

Yes they should be. I will look back over the board to make sure. I order from small bear and go though all the parts and label the bags before I do my build. Is there a specific resistor, or just all on the board?

Thanks

[jimilee]

Yes they should be. I will look back over the board to make sure. I order from small bear and go though all the parts and label the bags before I do my build. Is there a specific resistor, or just all on the board?

Thanks

There is a specific one but I don't know which. Trace the circuit around the pot I'd say.

[Scruffie]

Schematic link for the version you've built? 

[DB_1973]

http://www.madbeanpedals.com/forum/index.php?action=dlattach;topic=5521.0;attach=4149

This is the link to the schematic.

   I will check around the pot for the  R values

   Thanks

[chordball]

Socket R31 and raise the value until it oscillates at the point of your choice on the pot rotation.

[madbean]

Socket R31 and raise the value until it oscillates at the point of your choice on the pot rotation.

Yup. Try 33k, 47k and 56k.

[DB_1973]

I will try that thanks for all the help and info.