saint gillis
Well-known member
Here's some info about this amp if it can help anyone.
I've read on a forum in Dutch that it was a generic chinese board that fed several other models that are supposed to all be exactly the same :
SGH sound VSH100 / Fame vsh2-100 / Invasion vsh100 / Ashton Viper 100 vp-100h / Smarvo vsh-100 / Torque TTH-100 / London city bulldog
I've retro engineered the PSU and a part of the power amp only to understand how to set up the bias, it looks like a JCM800 clone
At the back you have these trimmers and 3 pins :
The center pin is the ground , the left and right are TP1 and TP2, you need 62mV between the ground and each test point to get 60% power on the EL34, or 72mV if you prefer 70%
I've read on a forum in Dutch that it was a generic chinese board that fed several other models that are supposed to all be exactly the same :
SGH sound VSH100 / Fame vsh2-100 / Invasion vsh100 / Ashton Viper 100 vp-100h / Smarvo vsh-100 / Torque TTH-100 / London city bulldog
I've retro engineered the PSU and a part of the power amp only to understand how to set up the bias, it looks like a JCM800 clone
At the back you have these trimmers and 3 pins :
The center pin is the ground , the left and right are TP1 and TP2, you need 62mV between the ground and each test point to get 60% power on the EL34, or 72mV if you prefer 70%
