Help with BOSS-CE2/Corrral Chorus.... Part question

[fs2o]

Hey folks...

I'm new at building my own effects. I have little knowledge of electronics, but I've successfully completed a few easy projects...

My questions are rather simple though:

1 - What is the Rin (resistor I assume) on the Corrral Chorus layout? What value is it? It's on the lower left side of the collored layout: http://www.tonepad.com/getFile.asp?id=101

2 - What does the RD11EB didode do (can't find one anywhere)? What about the IC TL022 (also can't seem to find it)? Are these usually hard to find?

Thanks guys!!!

regards from Brazil

[Seljer]

Rin is there to prevent popping noises when you hit the footswitch. Its not neccesary but stick a 1M or 2.2M resistor in there.

the diode there is an 11 volt zener diode according to google, I believe its there to protect against wrong/too high voltages

and hopefully you should be able to replace the TL022 with some other kind of dual opamp (TL072 or any others out of that series) if you can't find one.

[fs2o]

Thanks a million!!!!!

And by the way...

I'm sorry for the triple post... my browser kept giving me an error message...