Chorus Clone IC and trim pot clarifications

[olivero1]

Hello!

I am in the process of building a popular chorus clone. I am using a PCB I purchased from Tonepad and the product is called Corral.

Any guidance that you can provide would be most appreciated!

My first question is in regards to the ICs.

I have opted to sub IC1 (4558) with  the TI RC4558IPE4; IC2 (TL022) with TI TL022CPE4. Based on my own research in the data sheets, not the web, these should work. The question is am I correct, or in other words have any of you used these ICs, hopefully with success?

As for IC3, IC4 (MN3007;MN3101) and RD11EB (diode) I am having a wonderful time trying to find replacements for these. An even better time trying to find them! Any suggestions, ideas, donations?

Now for my second question.

The Trim Pot it calls for is 10k, would a 15k work as well? It is the only part that I forgot to order and I have salvaged an old car radio for the "gold" located inside! Am I risking damage to the timer or any other parts? Or will it simply provide a larger adjustment range?

Thanks for reading my questions. If you require clarification(s) please let me know.

BTW - This is my first post. It is funny that I happened to find you guys while looking for a LM308 for another build I just finished last week. You all have some great info here and I hope I am welcome to read and learn from your posts.

[.Mike]

I have opted to sub IC1 (4558) with  the TI RC4558IPE4; IC2 (TL022) with TI TL022CPE4. Based on my own research in the data sheets, not the web, these should work. The question is am I correct, or in other words have any of you used these ICs, hopefully with success?

Yes, these should work fine. The datasheet says that the 4558IP can handle a bigger temperature range than the 4558D, no problems there. The TL022CP is the standard IC. I have no idea what the E4 means, but I would think that if it made a real difference, they would specify it in the datasheet-- which they don't.

As for IC3, IC4 (MN3007;MN3101) and RD11EB (diode) I am having a wonderful time trying to find replacements for these. An even better time trying to find them! Any suggestions, ideas, donations?

Smallbear has the MN3007 and the MN3101. At $19 for the pair, I'd socket them for sure. The zener diode is covered pretty well in the Tonepad build reports.

The Trim Pot it calls for is 10k, would a 15k work as well? It is the only part that I forgot to order and I have salvaged an old car radio for the "gold" located inside! Am I risking damage to the timer or any other parts? Or will it simply provide a larger adjustment range?

The trimpot is used as part of a voltage divider (along with R27 and R28) for setting the bias voltage. I would imagine that 15k would be fine. If you're ordering the other ICs from Smallbear, you might as well order the proper part, though. It's only $0.85.

BTW - This is my first post.

Welcome, and good luck with your project.

Mike

[olivero1]

Thanks  mike!

I have always hesitated ordering from smallbear  - but it looks like it is time to Place the order!
I am socketing all the ic's so I can play around a. Little if I want.
I am glad to know that I am on the right track!