ASM-1 LFO Problems!

[Iain Dunn]

In message <199707141737.TAA29122 at snail.stack.nl>, Erik Schuijers
<eriks at stack.nl> writes
>Hi,
>
>another *BORING* question for you all! I've finally built my ASM-1 into the
>panel! Everything sounded fine but one thing occured to me! The LFO doesn't
>produce nice square-waves and nice triangles! At high frequencies everything
>seems nice but on the lower end it 'deloads' by some RC constant and when
>you turn it all the way down it doesn't oscillate at all! 
>
>I checked the DIY archive but I can't find the answer there! 
>
>Some help might be needed!
>
>Erik
>
>BTW: I've built it exactly like in Gene's plans!
Hi Erik

Recently myself and a friend had the same problem with his ASM1. Also
there was a problem with the portamento. Both were related to back to
back 4.7uF tant caps and the TL082. We replaced the 082 in the lfo with
a1458. This evened up the waveforms then we replaced the tant caps with
1uf non polarised polylayer. Works a treat !

The same goes for the portamento circuit ie: replace the Tants with a
single non polarised cap preferably poly layer for low leakage


-- 
Iain