Quote from: Govmnt_Lacky on November 27, 2020, 08:03:29 PM
That brown electro cap sitting above the toggle switches in your pic.
That scares me a little
Oh yeah definitely!
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Show posts MenuQuote from: Govmnt_Lacky on November 27, 2020, 08:03:29 PM
That brown electro cap sitting above the toggle switches in your pic.
That scares me a little
Quote from: rpark71 on November 26, 2020, 08:11:32 AM
Had to go find out how to check the voltages and understand that its usually just the IC's and transistors that you measure? So the three IC's read:
IC1 (side not working)
1. 16.62v, 2. 16.53v, 3. 15.44v, 4. 15.92v, 5. 15.29v, 6. 15.36v, 7. 16.55v, 8. 17.19v
IC2
1. 15.42v, 2. 15.44v, 3. 14.06v, 4. 0v, 5. 15.29v, 6. 15.31v, 7. 15.26v, 8. 17.19v
IC3
1. 9.26v, 2. 5.91v, 3. 0v 4. -2.97v, 5. -3.04v, 6. 4.44v, 7. 5.74v, 8. 9.26v
I'm guessing the 0v and negative V readings are part of the issue - but not sure if that's normal as IC3 is the voltage doubler chip in the circuit. Nice to learn about voltage readings! I'm none the wiser, but might help you identify something.
thanks, Rich
Quote from: diablochris6 on November 25, 2020, 03:43:55 PMQuote from: Boba7 on November 24, 2020, 10:53:32 AM
Hey guys,
Just out of curiosity, what's the maximum delay time on the Sagan delay (I guess the 3rd head gives the longest delay)?
I've never really tried to time it out, but I looked at the equations for the PT2399 on Electric Druid's site to get a rough estimate. According to his formula, one PT2399 with a 50k time pot could pull about 600 ms. Since the three chips are pigggybacking off of each other, the 3rd PT could in theory pull of 1800 ms, but it will sound pretty gross and noisy. It wasn't really my goal to get those long times with this project.
Quote from: Bio77 on November 25, 2020, 11:55:46 AM
Does anybody know if the SMD version of the PT2399 is better quality or the same as the DIPs?
I've been building quite a few 2399 projects recently and it's a bummer when the 2399 has that static on the repeats. Was wondering if using a daughter board with the SMD version would be more reliable.
Quote from: culturejam on November 18, 2020, 01:07:46 PM
I'm still not sure.
Quote from: sonnyboy27 on June 24, 2020, 10:01:40 AM
I actually tried out a 680pF in parallel with a 100pF in my pedalPCB Pauper (Prince of Tone) and it sounded really close. Adds a nice midrange emphasis and cuts down on noise but it wasn't the most in depth test (looper into the pedal while putting the cap in and out of circuit repeatedly).
Quote from: Drew Hallenbeck on March 29, 2020, 04:24:42 PMQuote from: Boba7 on March 29, 2020, 04:13:24 PMQuote from: Drew Hallenbeck on March 28, 2020, 10:04:13 PM
Oh yeah, and we added pads so that it can use a through-hole or an SMD 5457.
The through-hole ones are still out there but they're getting harder to find and a bit more costly!
That looks great! Good job!
Is IC2 the lfo? (with a jack that close there could be some audible ticking)
Thanks for pointing that out! I didn't even consider the proximity to the jack. I'm hoping it wont be an issue but we could always shove a few things around if necessary!
Quote from: Drew Hallenbeck on March 28, 2020, 10:04:13 PM
Oh yeah, and we added pads so that it can use a through-hole or an SMD 5457.
The through-hole ones are still out there but they're getting harder to find and a bit more costly!