Rocket V1a Bypass Cap choices

[JoeCon]

Guys

I'm working on a rocket build with a switched bypass cap for V1a.
3 way switch with center position no cap ala the schematic.

Choices for caps I have are 1u, 10u, and 25u. Should I go for the biggest difference thus a 1u and 25u or something more subtle like 1 and 10 or perhaps 10 and 25??

Since I haven't heard the differences could someone explain the gain/tonal variations possible?

Thanks!

[xtian]

Check this out:

http://www.ampbooks.com/home/amplifier- ... capacitor/

This may not help you understand how it will sound, but it will definitely show you how much gain to expect, and why using a 25uF cap versus a 100uF cap will make no difference in tone or gain (to choose a blatant example).

[martin manning]

Go here: http://www.valvewizard.co.uk/Common_Gain_Stage.pdf and see Figure 1.26.

[M Fowler]

1uf and 10uf switched is plenty good enough gain boost options.

Or go with SP3T mini switch for 3 way switching 1uf, 10uf, and 25uf.

Mark

[JoeCon]

Gentlemen,

Thanks!

I'm sure I'll have more questions as this carries on.

[M Fowler]

Joe,

This is how I did the boost on a Reverb Rocket build a few years ago. Poor quality picture but you should be able to see I used three separate turrets to separate out the bypass resistor, 1uf cap and 10uf cap.

Mark

[JoeCon]

Mark

I did a similar layout, will post pics when I get my camera going.

Thanks.

[M Fowler]

Joe,

I waiting for that photo

[JoeCon]

Mark

Hope this works:

Anyways I tied them together then ran individual turrets for each. So I can have the resisitor alone or with the 1u or 10u.

[M Fowler]

Yuppers that will work and really makes for a nice option.