Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: W5FH on August 27, 2024, 08:45:10 pm

Title: Crate Tone Stack
Post by: W5FH on August 27, 2024, 08:45:10 pm

Hello-
    I have spent a fair amount of time studying and playing with the tone stacks shown on the Duncan TSC site. What a great resource. My question is in regards to the Crate tone stack. I am drawn to it after playing with settings of T,M,B and watching the responses. I found the same tone stack as shown on TSC site in the Crate BlueVoodoo 60H schematic. I would like to hear reports and opinions of this tone stack. Not so much the amp but the tone stack. I am considering using it in a build for just a basic, clean pedal platform build. It is specified as 1K source driver impedance on TSC site but stack is plate driven in 60H amp. I did look at displays on TSC site of a 38K source impedance for this stack. Any opinions as to whether it would be better plate driven or cathode follower? I realize that some of the Crate amps are solid state and was curious if that is why the 1K source impedance is specified? Thanks all!

Title: Re: Crate Tone Stack
Post by: Latole on August 28, 2024, 03:08:35 am

schematic;

Title: Re: Crate Tone Stack
Post by: W5FH on August 28, 2024, 07:03:07 am

Thanks for schematic LaTole. However, the tone stack I was specifically referring to is in a different portion of amp schematic and resembles the one on the TSC site nearly identically.

Title: Re: Crate Tone Stack
Post by: Latole on August 28, 2024, 07:35:11 am

Quote from: W5FH on August 28, 2024, 07:03:07 am

Thanks for schematic LaTole. However, the tone stack I was specifically referring to is in a different portion of amp schematic and resembles the one on the TSC site nearly identically.

Can you show it ?
What is TSC  ?

Title: Re: Crate Tone Stack
Post by: Willabe on August 28, 2024, 10:32:23 am

TSC = Tone Stack Calculator?   :dontknow:

Title: Re: Crate Tone Stack
Post by: Latole on August 28, 2024, 12:19:18 pm

Quote from: Willabe on August 28, 2024, 10:32:23 am

TSC = Tone Stack Calculator?   :dontknow:

Thank's !

Title: Re: Crate Tone Stack
Post by: pdf64 on August 28, 2024, 01:36:30 pm

https://www.guitarscience.net/tsc/crate.htm#RIN=1k&RT=250k&RB=250k&RM=50k&R1=68k&R2=47k&R3=22k&R4=10k&RL=1M&C1=220p&C2=47n&C3=220n&C4=4.7n&RB_pot=LogA&RM_pot=LogA&RT_pot=Linear