Duncan's TSC Question

[AdmiralB]

One of the variables with TSC is the source impedance. For the Fender, it's 38K - OK, I understand that. For the Marshall, it's 1.3K - got that too.

But for the Vox, it's 56K. Why? The Vox is driven by a direct-coupled CF just like Marshall, only difference is the cathode resistor is 56K rather than 100K. Is this a typo?

[Bruce / Mission Amps]

One of the variables with TSC is the source impedance. For the Fender, it's 38K - OK, I understand that. For the Marshall, it's 1.3K - got that too.

But for the Vox, it's 56K. Why? The Vox is driven by a direct-coupled CF just like Marshall, only difference is the cathode resistor is 56K rather than 100K. Is this a typo?

I think so.... when I use it I always change it 1.2k.

[novosibir]

That's a typo! The VOX's CF output impedance is still lower than of the Marshall's CF and is even a tad lower than 1K

Larry