Hi guys,
I'm luca from Italy..so..excuse me for my english..
I often repair amplifiers ss or ts and when I have a money I built someone of them.. It's my passion!
Yours site is a great place of information where all can growing! thank you!
But..let's get to the point..
I have to repair a hiwatt t40 (I don't find the complete schematic) that has a loud fffffffffff ...a wind souffle (hardly like a white noise) when I increase the master pot.
I found a power schematic, schematic post master and I made a great effort of reverse engeneering to write a part of schematic where the noise is generate.
This latter is generate between t3 and t4, the first two 12ax7, precisely on -+15v.. so, after the signal passes through the opes.
I replaced the two 4558s, all 15v's caps, resistors and zeneres, master pot and valves..the noise is always there..ideas, tips, helpssss????
please! and.. thank you all!
I'm luca from Italy..so..excuse me for my english..
Yours site is a great place of information where all can growing! thank you!
But..let's get to the point..
I have to repair a hiwatt t40 (I don't find the complete schematic) that has a loud fffffffffff ...a wind souffle (hardly like a white noise) when I increase the master pot.
I found a power schematic, schematic post master and I made a great effort of reverse engeneering to write a part of schematic where the noise is generate.
This latter is generate between t3 and t4, the first two 12ax7, precisely on -+15v.. so, after the signal passes through the opes.
I replaced the two 4558s, all 15v's caps, resistors and zeneres, master pot and valves..the noise is always there..ideas, tips, helpssss????
please! and.. thank you all!