Looks like it is from 1980 according to the speakers assuming I used the right number for the coding. 

Anyway, anything I should be looking for particularly?  This thing has every feature under the sun including something called "fun machine".  I see quite a few transistors...all in the black plastic packages like modern stuff. 

There are also some IC's.  Everything looks soldered and not socketed.  One thing I did notice was the use of Sprague Orange Drop caps throughout most of the unit. 

-Zach Omega

Well if it still works, maybe Ebay will want it.

The thing must weigh 100 pounds.  Besides, I like taking junk apart...

-Zach Omega

Quote from: RaceDriver205 on February 04, 2007, 01:36:57 AM
Well if it still works, maybe Ebay will want it.

Add a polarity protection diode. I found that rare old organ chips take wrong polarity not so happily, sad like dead

Look through the boards very carefully for an MK50240 or similar number.

That is a top octave generator chip. Feed it 2MHz and out pops one of each note of the western music scale. They are unavailable and coveted. If you have one or more in there, remove it every-so-carefully.

Does the thing have a bass pedal section? If so, remove and stack that away. I have a back-room project going to use one PIC to make a bass pedal section out of one of these.

Other than that, unless you want the keyboards and switches, it's just the power amplifier. It might be useful.

Is that how the RS09 and other string machines are able to have unlimited polyphony?
I've always wondered about that.

I have no idea what this thing has.  I didn't get a chance to look at it too long.  It was freezing outside and I had to store it in my garage.  I'll probably get it all apart either tonight or tomorrow.  If I see anything that looks interesting, I'll let you know.

-Zach Omega

Quote from: R.G. on February 04, 2007, 10:06:53 AM
Look through the boards very carefully for an MK50240 or similar number.

That is a top octave generator chip. Feed it 2MHz and out pops one of each note of the western music scale. They are unavailable and coveted. If you have one or more in there, remove it every-so-carefully.

Does the thing have a bass pedal section? If so, remove and stack that away. I have a back-room project going to use one PIC to make a bass pedal section out of one of these.

Other than that, unless you want the keyboards and switches, it's just the power amplifier. It might be useful.

QuoteIs that how the RS09 and other string machines are able to have unlimited polyphony?
I've always wondered about that.

It's certainly one way. The CD4024 is a 7 stage binary ripple counter. With a MK50240 and twelve of the 4024's, you generate all 96 of the standard musical notes. At once. All the time.

You can then combine and filter them in any way you like.

One board has a socketed part:
"AM1 8021DAA
At least I think that first one is an 0 and not a C or G--->010067
260"

Another board has 4 of the following:
"SAJ 110
HSH901 2"

One
"UA748CP"

One
"8010CN
C2347"

One (this one is a fat boy)
"8024HR
739
C9781"

A bunch of
"8022A
SN7405N"

Some
"8018A
SN7405N"

"SN7412N"

Any of this sound useful?  All of the transistors are unmarked and have green or blue paint on the tops and the pinouts labelled on the housing. 

-Zach Omega

No, none of those sound like things you could use. May go to alldatasheet.com and search for them, see what they are.

Sadly, I don't think any of it looks all that useful.  Now I'm just debating whether or not to even both removing the transistors or just throw them and the boards in the can. 

Thankfully, I just like taking junk apart. 

-Zach Omega

Quote from: RaceDriver205 on February 04, 2007, 09:01:23 PM
No, none of those sound like things you could use. May go to alldatasheet.com and search for them, see what they are.

I'd say unless you absolutely can't spare the room you shouldn't just trash old hardware like that. I assume you've already taken bits from it you need, but perhaps there are organ enthusiasts that may want original parts??

Well if anybody is interested in any parts from the organ for cheap say the words...

-Zach Omega

Quote from: Jaicen_solo on February 05, 2007, 01:12:33 PM
I'd say unless you absolutely can't spare the room you shouldn't just trash old hardware like that. I assume you've already taken bits from it you need, but perhaps there are organ enthusiasts that may want original parts??