In a bind - need a 500K

[swinginguitar]

Need a 500K pot and all i have is 100K....is there any way to hack it up (i know you can parallel to get a lower value, but that doesn't help me)

radio shock doesn't sell 500k around here.

otherwise will have to snail mail something in...

[Mark Hammer]

maybe you DON'T need 500k.

What's it for?

[swinginguitar]

TS type circuit....gain obviously

[newfish]

TS type circuit....gain obviously

Pop a fixed-value resistor in there - maybe 330K, and ride your guitar's volume pot - while you wait for snail-mail...

[Mark Hammer]

Here's your chance to learn a bit of electro-math, assuming you have the components and patience.

A TS uses a 51k and 500k pot in the feedback loop.  The equivalent would be a 10k resistor and 100k pot.  The 51pf feedback cap rolls off highs around 5.6khz at max gain.   For a 10k+100 arrangement, the equivalent would be 270pf.

The max gain of a TS is 118x.  Replacing the 4k7 ground-leg resistor with 820R-1k will put you in the same range.

The .047uf/4k7 network gets you a low-end rolloff around 720hz.  Replacing the .047 cap with .22uf will put you in the same place.

There you go.  A fully functioning TS with the same tonal and gain properties and a 100k gain pot.

[swinginguitar]

Here's your chance to learn a bit of electro-math, assuming you have the components and patience.

A TS uses a 51k and 500k pot in the feedback loop.  The equivalent would be a 10k resistor and 100k pot.  The 51pf feedback cap rolls off highs around 5.6khz at max gain.   For a 10k+100 arrangement, the equivalent would be 270pf.

The max gain of a TS is 118x.  Replacing the 4k7 ground-leg resistor with 820R-1k will put you in the same range.

The .047uf/4k7 network gets you a low-end rolloff around 720hz.  Replacing the .047 cap with .22uf will put you in the same place.

There you go.  A fully functioning TS with the same tonal and gain properties and a 100k gain pot.

all bow down....