Try Mouser.com or Digikey.com
LF351 or TL071 best substitutes for 741 and it will improve the tuning stability.
CA3046 have been out of production, only direct substitution is NTE912 from Mouser.
funny there are lots of CA3046s on ebay and and one NTE912 , are they the wrong CS3046?
Are OSC 2 and 3 tracking the keyboard ?
Yes they are working fine..
Then I can see only resistor 27 (cracked or desoldered) or IC1 or IC2 or IC3 being involved in the malfunction. These components all generate the pitch control voltage for pitch of VCO 1.
Or possibly bad contact inside trimpot R8 and/or R11.
if you have the time I have upload 2 pics below I can find IC1 and IC3 can’t see IC2 ..
https://www.box.com/s/hoc9df2bmdpzh8nxsi4a
Any chance you could point out resistor 27 on this pic?
https://www.box.com/s/6ozfnzidp8mugspictn4
Click on the link below to see all parts numbers and their location.
IC2 is shown as separate transistors on the schematics (but identified as IC2 and IC7 near each of them). Each SG3821 have 5 internal transistors. Two of which have one leg internally connected (emitter).
Just check with a multi meter and R27 reads only .600 but R80 and 129 read 2.200 ( i think they should all be the same)
can I replay with this?
http://uk.mouser.com/ProductDetail/IRC/GS3T0-511K-1/?qs=sGAEpiMZZMvmbEO3z9LBjGWko4ywtOId
??? 
R27, R80, R129 should all read 51.1 K Ohms (with only 1% tolerance) when measured separately and with the power off on the Mini (of course).
A few notes:
Moog published a bulletin recommending replacement of all SG3821s with CA3046 types.
Moog used 3046 (either CA3046 or LM3046) in many of their products.
Oberheim and Arp prefered the CA3086/LM3086.
I’m not exactly sure why. The 3046 apparently has slightly better specs.
There is also the LM3045J, a ceramic encased device with a US military number.
I keep all in stock, though they don’t blow out all that often.
Often I’m replacing 3821s with 3046, but don’t see too many go bad.
If the capacitor you have are coated in horizontal colored stripes they may be Mullard “tropical fish” caps.
While good caps when new, they have a habit over time of breaking off at one side or the other where a lead is located.
I tend to replace those with Cornell-Dublier (CDI) caps. One can get the same exact pin spacing and component size and they’re made more sturdy than the old Mullards.
Before just replacing opamps, you might want to check if the opamp sending voltages to VCO1 is bad.
I suspect it may be a culprit and if so, pin 6 may have a very high voltage on it. I’m guessing 8 or more volts.
741s are still available all around and shouldn’t be a problem obtaining.
As a hobbyist making repairs to equipment I own, or in projects, I have no liability to anyone else, and no one to blame but myself for the outcome. That said, I’ve bought and used 1468, 4013, 3080, 556 and 3046 chips from ebay sellers in the US, China, Hong Kong, Singapore and the Philippines with good results. Shipping is often included, and delivery times range between a few days and a month, with an average of about two weeks. Recently I ordered 50 2N3904 transistors from Singapore for $1.59, shipping included, and they arrived in 8 days. I needed one for a V-trig to S-trig conversion cable.
I have order some Op Amps ..
I did some checks with a scope and found there is no Waveform at all at R1, R22 @ R23 but there is as R53 , R73 and R89 same as R111 ,R130 & R145..
if I jump from R53 to R1 I get a waveform.. ? so could it be the Resistors or something before R1 not sure what happens before I can get .06 43k at maplin but they look much smaller I guess .06 is ok to use
just check with the OSC board removed and the R1 etc reads the same as the other ..
Waaaaaaait a minute.
Didn’t you start this thread by saying that OSC 1 was “super high” in pitch, and now you’re saying that there is no rectangular and triangle waveforms for OSC 1 ???
The only thing you should be concerned about, for now, is to make sure you have a sawtooth waveform with the scope connected at the collector leg of Q15 (Edit: rather Q3). According to your first statement, it should be of high frequency (super high pitch). The other waveforms are derived from this sawtooth.
The pitch control (by control voltage) and waveform generation are two separate sections of the oscillators.
Begin by trying to fix the super high pitch problem first, in the pitch control section. One thing at a time.
I am trying to fix the super high OCS 1 , which stay super high and does not track keyboard or pitch wheel or master tune.
I was tracing the OSC board with a tech frend , and we found there is now waveform shouldn’t at R1 etc. which are part of OSC 1 sound source so it looks like my problem is before the IC etc
Thanks all I am saying .. Not new falt
Cheers again , for anyone that is taking time to help
Best
Andy
Ok Thanks
I have a sawtooth at Q15 (which is OSC 2) but nothing at Q3 (OSC 1)
not sure what the High Pitched OSC 1 problem was but not there is no sound at all from OSC 1
Dead OSC 1.
Strong suggestion: send your oscillator board to a tech for repair.
Good luck.
point taken, My friend is staying in a week a full time Tech he will look at it , but I will need part in stock so he can fix it while he is down..
If anyone know were the OSC source starts so I can track on the board that would really help ..
Just to recap :
there is no waveform at Q11 or R1
Just a note not to immediately assume it’s a component.
It could also be a bad PCB connection, loose connection or any number of possible other problem(s.)
Proper troubleshooting is analyzing the schematic and theory behind operation.
Replacing parts based on a hunch is not troubleshooting.It’s educated guesswork.
The difference is between paying a “tech” 2-4 hours guessing and paying someone that has enough experience to solve the problem in 30-60 minutes.
It’s cheaper to pay an experienced tech $75/hr than it is to pay less to someone that might take hours locating the problem.
you are 100% right on this, in my case it has very little to do with money and more to do with being a hands on person. be it Oak Door’s and Windows the odd synth , to date a JP8 and ARp2600.. my new thing is a MiniMoog.. and I love it. but my oldest friend is a tech so I alway have him to call and fall back on..
This Forum is new to me and I have found it a great place… I just hope I can give something back soon..
Andy