Recent content by Detrital

I'll re-check it. Tests were done on a 9V battery so it's definitely not 11V.

I do have an audio probe. Inputs to the FV-1 are clean and perfect. There is no noise in the dry signal path either. Only noise on the FV-1 ouput and "wet" portion of the circuit. I tried a 10k connected to the output filter as per the datasheet, and it did reduce the noise slightly, but it also...

LM258P Pin2: 2.01V Pin5: 4.15V Battery used for testing is about 8.7V, so they are only ballpark figures for setting the trimmers.

Thank you for the reply. I got it working last night thru trial and error adjustment of the trimpots. Many thanks for the schematic link too, much appreciated. My PCB does not match the layout in the build doc you posted, the trimmers are in a different position, the LM13700 has been flipped...

Tonight I will take some voltage measurements of pin2 and pin5 of the LM258P as this is where both trimmers connect.

I had the same problem and just got it working last night. I could get some random modulation to the gate control, but no chorus effect. Here's what I did. 1. Replaced the cheap MN3207 I got from eBay with a more expensive Coolaudio V3207D from eBay 2. Top soldered every resistor to make sure...

I got it the low tide going !!! Ended up top soldering all of the resistors so I suspect I had a dry joint somewhere. It required VERY careful trimming of the gate and BBD, then all of a sudden it sprang to life !!!

Low Tide - I replaced the MN3207 with a V3207D, still has the same problem.

HAARP - Looking at the schematic, if the noise is only present when the WET control is turned up, I think it must be coming from the FV-1, 3v3 or Vref. Any thoughts? Low Tide - The silkscreen in the build doco doesn't match the PCB I have. It makes checking component values and build errors...

I think they are OK

Thanks for the tip. Unfortunately small bear and electro smith are both out of stock. I'm in Australia too, so the shipping costs are insane since USPS stopped shipping here. I was quoted about $100 USD to ship 4x 2164 IC's with fedex from Cabintech :confused: I've replaced the 32k Xtal and...

ElectroVibe - I've put a 78L12 in. Now I'm only waiting for the 12V globe to arrive. Thanks to everyone who helped to clear up my questions for this build. HAARP - Have replaced the FV-1. There is still noise but not quite as bad. I might try replacing the 32k768 crystal next, as the noise is...

Cheers, thanks for clearing that one up - much appreciated !!!

https://docs.pedalpcb.com/project/ElectroVibe-Schematic.pdf I found this very handy schematic in another thread. Looks like it is actually a 78L15.

Thank you !! I've already got ton's of 78L05 so I'll pop one in, and order the bulb. Much appreciated. I really can't wait for it to be finished. Not surprised you built three :cool: