Parts substitute for Tonepad Maestro FSH-1

rousejeremy · October 06, 2009, 10:29:35 PM

I was purchasing parts at Honson Electronics in Toronto today and couldn't find any MAX1044 or LM13600 chips for the FSH-1.

What are suitable substitutes for these parts?

Ripthorn · October 06, 2009, 11:21:43 PM

you can look for TC1044 or LTC1054(not sure on that number). I am not sure what to look for in terms of the LM13600, but you could try any dual OTA (I think it's just a dual).

Mark Hammer · October 07, 2009, 10:16:13 AM

Honson should have LM13600s. I buy them there too. They may simply be out of them at the moment.

They also carry the ICL7660, which is the same thing as a MAX1044.

DimebuGG · October 07, 2009, 12:08:37 PM

Has anyone tried using resistor voltage divider instead of split supply of this unit using MAX1044?..

p_wats · October 16, 2009, 04:00:24 PM

Hey guys,

Long time reader, first time poster...blah, blah, blah. This FSH-1 project has finally gotten me to join the forum.

I read somewhere that you could use a NJM13600D instead of the LM13600. Anyone know if there's any truth to that, as Smallbear has the NJMs handy.

And now, if you don't mind the slight hijack, the very stupid noob-in-over-his-head question: given the MAX1044, what power supply will this take? I've read of people using a 9V, but will that be positive or negative ground?

Thanks!

p_wats · October 16, 2009, 04:15:08 PM

Scratch that! Just did some searching and found several people on this forum swapping LM13600 for NJM13600Ds all over the place. Good to know!

Would you believe I just went to Honson for the first time last night? I had no idea that place existed! It's excellent! I just wish they had the LM13600s in stock...and some of the stranger pots for this build (B2M, 1M Reverse).

Speaking of those pots, I read that someone used B1Ms for both with good results. Any thoughts?

Mark Hammer · October 16, 2009, 04:35:29 PM

If you walk over to the other side of Spadina, about 50 yards from the corner, on the south side of College street, you will see Creatron, which also has a decent choice of components. Sometimes Honson has the better stock or price, sometimes Creatron. And while Small Bear's pad-per-hole board are the absolute benchmark for that type of board AFAIC, Creatron's are a pretty decent second best...and cheap too.

rousejeremy · October 16, 2009, 05:18:41 PM

The FSH-1 Project on GGG uses two CA3080 chips instead of the LM13600. Does it really make much of a difference?

p_wats · October 16, 2009, 05:31:51 PM

Quote from: Mark Hammer on October 16, 2009, 04:35:29 PM
If you walk over to the other side of Spadina, about 50 yards from the corner, on the south side of College street, you will see Creatron, which also has a decent choice of components. Sometimes Honson has the better stock or price, sometimes Creatron. And while Small Bear's pad-per-hole board are the absolute benchmark for that type of board AFAIC, Creatron's are a pretty decent second best...and cheap too.

Wow! How did I not know any of these places were so close? I've been ordering online this whole time. Thanks for the heads up! Looks like Creatron doesn't have the ICs according to their site, but they might have the 2M pot.

Mark Hammer · October 16, 2009, 07:29:22 PM

Quote from: rousejeremy on October 16, 2009, 05:18:41 PM
The FSH-1 Project on GGG uses two CA3080 chips instead of the LM13600. Does it really make much of a difference?

The 13600 will likely distort a bit less. Whether you think that is better or worse is a matter of taste.

rousejeremy · October 16, 2009, 09:52:16 PM

Mark, could the LM13600 on the Tonepad layout be replaced with two CA3080? I ask because I already etched the board.

frequencycentral · October 17, 2009, 07:34:55 AM

Quote from: rousejeremy on October 16, 2009, 09:52:16 PM
Mark, could the LM13600 on the Tonepad layout be replaced with two CA3080? I ask because I already etched the board.

3080's lack the darlington pair buffers of the 13600/13700. The defunct 3094 is closer to half a 13600/13700 than a 3080 is, as it has the buffers. That said, if you've already done the board it would be best to go with 13600/13700.

LT1054 is not quite a part for part sub for MAX1044, as pin one would need to be left unconnected (that's the boost feature on the MAX, LT1054 being already at ultra high frequency). ICL7660 is similar to MAX1044, but lacks the boost feature, so you'll get high pitch whining.

p_wats · October 26, 2009, 03:16:27 PM

Hmm, so the ICL7660 is the source of the whining in mine (just built it)? I can get by with it there, as I doubt I'll use this effect all the time, but I'll order a MAX1044 next time I'm grabbing parts if that will fix it.

rousejeremy · November 06, 2009, 04:55:42 PM

I tried Creatron today with no luck. They have LM13700 though. Can one of those be used in place of the LM13600?

Edit: Just read the above that answered my question.

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Parts substitute for Tonepad Maestro FSH-1