Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Ariel tube fanatic on September 15, 2024, 04:56:25 pm
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Hello,
I have an ab763 clone with a multi tap ot, 2,4,8 i would like to wire.
I will not use the 2 ohm tap, i can just heat shrink it right ? And not connect to anything? And how so i go about the other jacks?
Connect each tap to a shorting jack (switch to gnd and tip is the tap?)
Thanks to anyone that would help
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Hello,
I have an ab763 clone with a multi tap ot, 2,4,8 i would like to wire.
I will not use the 2 ohm tap, i can just heat shrink it right ? And not connect to anything? And how so i go about the other jacks?
Connect each tap to a shorting jack (switch to gnd and tip is the tap?)
Thanks to anyone that would help
Depends on which type of AB763 amp, and which type of OT
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Its a mojotone kit
Attached layout,
This ia the OT
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I have an ab763 clone with a multi tap ot, 2,4,8 i would like to wire.
I will not use the 2 ohm tap, i can just heat shrink it right ? And not connect to anything? And how so i go about the other jacks?
Connect each tap to a shorting jack (switch to gnd and tip is the tap?)
Yes, just heat shrink the unused tap.
No, you can not use any shorting jacks.
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sorry link wasn't attached for a reason
this is the OT
https://www.mojotone.com/Blackface-Bassman-Super-Reverb-Vibroverb-Output-Transformer
the reason i can't use shorting jacks is because if i short one tap to gnd it basically shorts the entire secondary ? and if i use the aux as a 4 ohm tap i will get lower volume because the 8 ohm is grounded via the shorting jack?
thanks everyone, it's running in my head but i can't reach the answer fully, your replies help
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You need to use only one ohms output.
Leave other not connected.
Look any Marshall amp with few OT output, you'll understand
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the reason i can't use shorting jacks is because if i short one tap to gnd it basically shorts the entire secondary?
Correct.
....and if i use the aux as a 4 ohm tap i will get lower volume because the 8 ohm is grounded via the shorting jack?
No.
It will short the entire secondary.
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If it’s an amp head, you could wire the switch lug of a tip-switch jack to a chunky wire-wound dummy load resistor (to ground) - for dummies who forget to plug a speaker in. (I.e. This would be for the main speaker tap)