Ordering parts - Need some help

[A30N]

Hi,

Sorry to keep chucking loads of questions @ you guys, but this is my first synth im building and i really wanna get it right

Im ordering some parts and stuck on a few areas if you don't mind helping me out

Im stuck on a few parts:

Sound Lab:

C3 Tantalum Capacitor 2uf.... What voltage 10/16/25 v?

I cant get all the 1/4 watt resistors @ 1% should i just go for the 5% or try and use as many 1% i can get combined with 5%. Or can i use .4 watt?

I cant find the hex inverter cd40106 what hex inverter could i use instead?

Sample and Hold:

I have noticed on peoples front panels that their sample and hold has 2 pots "rate" and "output" but i can only see 1 pot in the parts which is R4 Potentiometer 1M and this is for sample rate. Where is the pot for output and do i need any other components?


Sound Lab Mini-Synth Intra-VCO Modulation:

I cant find any non-electrolytic caps @ 2uf but can find 2200pf one, can this be used?


Fine Tuner circuit:

ant find any 50k pots - can i use a 47k?

VCO V/Oct Scale Adjustment Modification:

Is this worth doing? i dont intend to play the synth live, more recording down and chucking in a sampler.

I see the 2K PT146 are hard to find in the uk, is it worth the hassle?


Thanks,
Jamie

[LetterBeacon]

[A30N]

Hi LetterBeacon,

Thanks for taking the time to help me out.

The resistors im having trouble finding from Rapid are:

1/4 watt 1% - 39k, 47k and 100k which is sold out.

I can find them @ RS but they want me to buy them in packs of 5 with a subtotal of £12

Also i can only find a 2.2uf Tantalum Capacitor (c3 ) instead of a 2uf will this be ok?

Cheers,
Jamie

[LetterBeacon]

No problem.

Rapid have them in packs of 100 @ £0.95 each:
39K = 62-0937
47K = 62-0942
100K = 62-0964

I know buying 100 seems like over-kill but those values crop up a lot in SDIY, especially 100K.

Yep, 2.2uf tantalum should be fine too.

[A30N]