by dazedbyday » Thu Mar 27, 2014 9:23 am
The master volume ultra linear is the silverface bassman 135 right? It isn't really like a model t too much. The model t is based off the bassman design, but the tweed bassman, not the black face/silver face. This is similar to the marshall jtm45, super lead, super bass, etc. The design of the later fenders changed a bit and, if i can trust the schematic I have, is more like a black face but with a bigger output section of 4 6l6s. Breaking it down for each channel it goes input gain stage, tonestack with channel volume, gain stage, both into master volume, output section. The model t has the extra gain stages going: input gain stage, channel volumes which then sum into, double gain stage (half of a tube feeding into the other half,) tonestack into, master volume, output section. So the model t gets an extra gain stage but it isn't like that adds a shit ton of extra gain pushing it into 5150 territory or something like that. My limited technical knowledge and jargon should be corrected if I am not understanding this right but I think thats the differences between the two. The bassman 135 will serve you well in being clean and loud, but it will have a different style voice then a model t. I have a bassman 100 that I need to put back together, but that is like the 135 but with a normal output section and not ultralinear.
Now the Fender model t. That is basically the fender "the twin" or "evil twin" red knob twin, or the red knob dual showman. They are almost exactly the same thing.