Morning, check your pickups in the cbg. The positives arr soldered to the small circle and negatives to the large one. If correct, change them on the jack. Ricky Martin
Ricky Martin said:Morning, check your pickups in the cbg. The positives arr soldered to the small circle and negatives to the large one. If correct, change them on the jack. Ricky Martin
warren, i too have built a lil gem and it works fine - i also have the schematic for that buffer tho i haven't tried it yet - i did stick a 250k vol pot on one piezo cbg and it took away the noise, but muddied up the sound - i'll keep trying to make the ruby work just because i'm stubborn
The ruby I built sounded great at first - and then when I switched to a longer set of wires going to my jacks (so it would fit in the box I wanted to use) it developed a horrible hum. If I put my finger on the negative wiring post of the jack the hum would decrease a lot, and with my finger on the positive wiring post the hum would almost completely disappear.
After a good night of sleep and a polarity check in the morning I discovered I switched the positive and negative wires on the incoming jack. After I resoldered to the correct post the hum was gone and the sound was clear again.
I know you said above that you've checked and rechecked the polarity at the piezo, so I don't have any new ideas for you - just a confirmation that the schematic does work with piezo's from at least two different manufacturers that I have used.
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