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cap coupling to interstage transformer or direct coupling?
cap coupling to interstage transformer or direct coupling?
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Old 23rd April 2018, 02:58 PM   #21
claudiomas is offline claudiomas  France
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audiowize if you look for perfect DC square wave (!!!)
give up tubes amplifiers
discrete circuits perform much better at very low cost
tube amplifiers are from the beginning of hystory
direct heathed triodes and transformers
every ting else no matter of interest for my
and i hate capacitors and transistors, from four decades
every day i replace death capacitors and transistors
and resistors of course
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http://claudiomas.monsite-orange.fr/
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Old 23rd April 2018, 03:04 PM   #22
audiowize is offline audiowize  United States
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A capacitor is still in the signal path with an interstage transformer, it's in the power supply...
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Old 23rd April 2018, 03:05 PM   #23
pieter t is offline pieter t  Netherlands
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So what??
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Old 23rd April 2018, 03:09 PM   #24
audiowize is offline audiowize  United States
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Quote:
Originally Posted by claudiomas View Post
and i hate capacitors
every day i replace death capacitors and transistors
and resistors of course
Quote:
Originally Posted by pieter t View Post
So what??
Because of this incredibly common misconception that an interstage transformer magically removes capacitors from the signal path.
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Old 23rd April 2018, 03:12 PM   #25
pieter t is offline pieter t  Netherlands
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We agree that, in an SE amplifier, the power supply capacitor is in the signal path.
The subject here however is about pros and cons of IT, direct and/or RC coupling.
So please stay on topic
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Old 23rd April 2018, 03:15 PM   #26
audiowize is offline audiowize  United States
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The OP asked if his amp could be transformed by IT coupling or direct coupling.

Another member said that you could remove "the death capacitors" with an interstage transformer. I corrected this. This is very much on topic.
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Old 23rd April 2018, 03:22 PM   #27
pieter t is offline pieter t  Netherlands
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Quote:
Originally Posted by audiowize View Post

Another member said that you could remove "the death capacitors" with an interstage transformer. I corrected this. This is very much on topic.
Can you quote that the other member replaced "death capacitors" with an IT?
Sorry, you seem to loose your arguments....
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Old 23rd April 2018, 03:31 PM   #28
audiowize is offline audiowize  United States
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What was your opinion on his implication? Replacing death capacitors with life capacitors?
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Old 23rd April 2018, 03:39 PM   #29
pieter t is offline pieter t  Netherlands
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So your post #26 is false. You pulled Claudiomas' remark on death capacitors out of it's context; be aware that English is not his native language, and that it is no so difficult to tackle him on his words.

Audiowize I am done with you: I stop discussing with people who repeatedly use false arguments, and bring up other issues when they loose their arguments.

Good luck!
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Old 23rd April 2018, 03:50 PM   #30
audiowize is offline audiowize  United States
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Perhaps you don't have a lot of experience with transformer evangelists. This was really, really common back in the 90s, when amateur builders would replace a coupling cap with an interstage transformer in a single ended amp and then proclaim that they had "no capacitors in the signal path".

Claudio's statements that he loves transformers and hates capacitors is very reminiscent of this sentiment of working toward no caps in the signal path. You can approach this by using regulated high voltage power supplies, but this requires solid state components, and he has lumped these into the bad category with capacitors.
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