Hi,
i would appreciate if someone could help me with the following;
As i am building a custum casing for my tube preamp of alu, this instead of the now used thin platesteel which feels kinda cheap.
To keep it tidy, i like to remove the AC switch 120/240V as i don’t need it as we have 240V over here.
From the transformator there are two wires going to this switch, a brown one, which is on the 120V side and a red one, which is on the 240V side, i presume these are the phase.
There is also a white wire from the transformator to the AC inlet, i presume this is the zero.
In order for me to remove the switch do in need to only use the red one?
And isolate the brown?
Sorry that i have little understanding how this transformator works, hope you can help me out!
Thank you on beforehand!
i would appreciate if someone could help me with the following;
As i am building a custum casing for my tube preamp of alu, this instead of the now used thin platesteel which feels kinda cheap.
To keep it tidy, i like to remove the AC switch 120/240V as i don’t need it as we have 240V over here.
From the transformator there are two wires going to this switch, a brown one, which is on the 120V side and a red one, which is on the 240V side, i presume these are the phase.
There is also a white wire from the transformator to the AC inlet, i presume this is the zero.
In order for me to remove the switch do in need to only use the red one?
And isolate the brown?
Sorry that i have little understanding how this transformator works, hope you can help me out!
Thank you on beforehand!
Hi Gents,
Something strange happened,
i now only have half the volume as i had before.
Could this be related to the switch?
I also replaced some resistors, but with the same R so i don’t understand what happened here?
(replaced some 0.5W PR with 2W AN tantalum’s, same R)
Any advice about the volume? could it be that i needed the brown wire instead of the red?
What would be strange as the brown was on the 120V side of the switch.
What’s going on?
Something strange happened,
i now only have half the volume as i had before.
Could this be related to the switch?
I also replaced some resistors, but with the same R so i don’t understand what happened here?
(replaced some 0.5W PR with 2W AN tantalum’s, same R)
Any advice about the volume? could it be that i needed the brown wire instead of the red?
What would be strange as the brown was on the 120V side of the switch.
What’s going on?
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I’m afraid you really need to measure some voltages. Seems like your system runs on 120V now? Did you double/triple checked the values on those resistors (sorry to ask)?
Hi,
yes, i did triple checked them, Wattage shouldn’t be a problem, no?
Will try to measure V tommorow, however the transformator is now on the 240V inlet, with red wire, should be correct, i don’t know the V the transformator makes, i don’t have a schematic, jt is from a small company this preamp, and the schematic is not public.
Aah good. Wattage shouldn’t be a problem
If you’re in doubt please measure that too, but don’t make yourself too difficult. Measure the wires to that switch first after un-soldering.
Also good to make a small schematic on paper.
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