Seems to work fine. The one switch position seems to be full frequency and sounds great. The other seems to remove a lot of bass (and volume) and really brings the icepicks. If that's how the original works I'd say tag it!
same issue in my build. noticed that switch 3 needs to be moved up 2 rows. that fixed the mid-bump problem but now all the high-end is gone. sounds like there's a low-pass filter at about 2-3k. don't see any other errors so it might just be a mistake in my build. i'll troubleshoot and report back if i figure it out.
I actually just built the perfboard layout a few days ago and I'm having the same exact issue with it! I can't imagine I made the same exact mistake on both layouts, but i also saw that two people have verified the other one. really at a loss for what could be happening with both of mine :/
pretty sure the 220k is right. I'm getting 4.9v on pin 2 which I believe is correct.
I went poking around with a probe and found that all the highs are still coming out of pin 6 (makes sense). R9/C5 & R10/C6 are both low pass filters with a cut off frequency of about 1.3khz. maybe some of those values are incorrect?
still learning about how all this stuff affects signal, so I'm not sure if cascading them like that is supposed to create some other kind of filter? might breadboard at some point just to triple check i didn't screw something up on my builds since others seem to have had good luck with the circuit.
Well on the schematic there is a Presence control of 25k not added to the layout. I don't know if this was a conscious choice. But it seems a variable resistor should be placed between switches 1 and 3. The 77 version has no such pot so....I no no.
I don't know if it helps but I built the other Hot Cake layout on dirtbox last week sometime and I had no issues with that one at all. They can't be totally different. Maybe that'll lead you to the answer.
I just built this and I thought I would give my conclusions. I’m fairly certain that switch one needs to go up a row. If you check the schematic, the labeling is switched, but that seems to do the trick. Also, reading through the schematic, it appears that one may wire it with the switch or with the potentiometer and that the schematic shows both solutions. The parts list for both versions differs slightly, but has the circuits have the same topography. I discovered that the 50 K pot was way too much for the drive, and I used a 10K linear, which provides a useful sweep. Also, I think I would go with the presence version with the pot rather than the switch I used in building this. The differences between the two settings are just too big and I’d rather get something in the middle at times. Thanks Anders for your work. I hope this is helpful to other builders.
Spoke too soon, Brain is right, just bring switch three to row C, and the switch works well, allowing you to select from a scooped or mid-boost sound. Definitely try smaller pot values if you find it too gainy!
Seems to work fine. The one switch position seems to be full frequency and sounds great. The other seems to remove a lot of bass (and volume) and really brings the icepicks. If that's how the original works I'd say tag it!
ReplyDeletesame issue in my build. noticed that switch 3 needs to be moved up 2 rows. that fixed the mid-bump problem but now all the high-end is gone. sounds like there's a low-pass filter at about 2-3k. don't see any other errors so it might just be a mistake in my build. i'll troubleshoot and report back if i figure it out.
Deleteyeah same issue here. seems the perfboard layout one is fine so i'll see if i can see whats wrong with this one
DeleteI actually just built the perfboard layout a few days ago and I'm having the same exact issue with it! I can't imagine I made the same exact mistake on both layouts, but i also saw that two people have verified the other one. really at a loss for what could be happening with both of mine :/
DeleteIs it possible that the 220k should actually be a 220 ohm?
Deletepretty sure the 220k is right. I'm getting 4.9v on pin 2 which I believe is correct.
DeleteI went poking around with a probe and found that all the highs are still coming out of pin 6 (makes sense). R9/C5 & R10/C6 are both low pass filters with a cut off frequency of about 1.3khz. maybe some of those values are incorrect?
still learning about how all this stuff affects signal, so I'm not sure if cascading them like that is supposed to create some other kind of filter? might breadboard at some point just to triple check i didn't screw something up on my builds since others seem to have had good luck with the circuit.
Just built this and I have the same behavior with the switch. Great suonding pedal btw! Thank you.
DeleteWell on the schematic there is a Presence control of 25k not added to the layout. I don't know if this was a conscious choice. But it seems a variable resistor should be placed between switches 1 and 3. The 77 version has no such pot so....I no no.
DeleteI didn't read the top of the build. The pot is a mod. May be a helpful add. May not be.
DeleteCool!
ReplyDeleteTagged.
I don't know if it helps but I built the other Hot Cake layout on dirtbox last week sometime and I had no issues with that one at all. They can't be totally different. Maybe that'll lead you to the answer.
ReplyDeleteI just built this and I thought I would give my conclusions. I’m fairly certain that switch one needs to go up a row. If you check the schematic, the labeling is switched, but that seems to do the trick. Also, reading through the schematic, it appears that one may wire it with the switch or with the potentiometer and that the schematic shows both solutions. The parts list for both versions differs slightly, but has the circuits have the same topography. I discovered that the 50 K pot was way too much for the drive, and I used a 10K linear, which provides a useful sweep. Also, I think I would go with the presence version with the pot rather than the switch I used in building this. The differences between the two settings are just too big and I’d rather get something in the middle at times. Thanks Anders for your work. I hope this is helpful to other builders.
ReplyDeleteSpoke too soon, Brain is right, just bring switch three to row C, and the switch works well, allowing you to select from a scooped or mid-boost sound. Definitely try smaller pot values if you find it too gainy!
ReplyDelete