I got a old bassman that i am wondering about how to implement a direct out in!.. Anyone in here who knows how to?
What exactly do you want? Is it just a direct out for recording? Or is it an effect device output input loop?
Anyway, your silverface (CBS) Bassman 100 should have a master volume potentiometer. It's wiper is the point where you should get access to.
Best regards!
Anyway, your silverface (CBS) Bassman 100 should have a master volume potentiometer. It's wiper is the point where you should get access to.
Best regards!
Do what Fender did in the Bassman 70. Two resistors and a jack off the 4 Ohm speaker output. (You still need a speaker or a dummy load.)
The master volume pot is not a good place for "tone", and also won't drive a heavy load (such as 300 feet/100m of cable to the sound booth).
Sure. Anyway, I needed to know his intentions first. If he just wants a DI out, I would have suggested a cathode follower or similar, if he wants a FX loop, a cathoder follower and a gain stage would have been my suggestions, with both jacks in between. The latter one can be seen in Fender blackface amps from the early 1980ies. I would suggest a 12AT7 instead of Fender's 12AX7, though.
Best regards!
As PRR's schematics in #4 shows, you need to drill a hole for the DI jack first, next to the speaker jacks. Optionally and in order to be able to get the amp back in it's original estate when desired, rewire one of both jacks, preferably the lower one in the schematics. Then solder a 270 Ω resistor across this jack, and a 2200 Ω one from the output transformer's green lead to this jack's tip lug.
If you're not very sure what this means, you'd better bring the amp to a serviceman.
Best regards!
If you're not very sure what this means, you'd better bring the amp to a serviceman.
Best regards!
Thanks a lot.. i understand your guidance.. Got some basic knowledge about electricity, and i think i can do this without ******* up my amp i see that there is a different trafo in bassman 100 than 70, with more outputs, can i still implement the direct out and what about Impedance, will it not change in this way? What about using a trafo for separation?
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On some quick search I found this silverface schematics. Does it apply to your unit? Anyway, I'd connect the DI voltage divider to a 4 Ω speaker terminal. And yes, a transformer following the voltage divider is a very good idea indeed. When you use a XLR jack and isolate the new transformer's secondary from chassis ground, it prevents ground loops as well.
Best regards!
Best regards!