Q: VCO pitch range

[guest]

if you end having to order online for the opamps
you could just tack on the other stuff as well
it would probably help get up to the minimum order anyways

[antto]

i got tlc272ip and sockets
but no desoldering wick.. damn i guess i'll try to desolder IC11, and probably damage it

[guest]

if you can get your iron
to touch all 4 pads at once
you can lift one side out first
and then do the other

[antto]

got wick and desoldered the 6562 .. it was very tough and i thought i burned it but it still works (i accidentally touched the plastic part of the TUNE pot, now the knob cap won't go in grr)
socket's in, tested LM358 - slightly better but still not good enough (the lowest 2 notes were off)
tested TLC272 - right.. it's audiably good (haven't measured the exact freqs or anything)

btw, i also soldered something like a sort of socket for Q8, tested a few transistors i had..
most didn't work (the square wave output is just a little queter and it sounds more like the sawtooth, sothe transistors didn't change anything..)
surprisingly i put a small guy with the label "A1267 GR" and sounds the same as my A733P

[guest]

glad to hear the tlc272 did the job

im a bit suprised to hear that q8 swaps
dont have much of an effect
id be curious to see a comparison of beta
for those transistors
as its fairly beta dependent
although not particularly Vbe dependent

[antto]

yup, thank you guest ;]

as for the Q8 i made a little thread here
since i found even more transistors which work as good (soundwise) as the 733P
i tryied to measure the hfe with my crappy multimeter but i guess i'm doing something wrong or the legs are too short