studio amp....
that zoble is a bit to large,,,try 15 turns of 18swg enamel copper wire plus 100nf cap for circuit..
that zoble is a bit to large,,,try 15 turns of 18swg enamel copper wire plus 100nf cap for circuit..
sr200 studio refer.
Last photos are with Apex zobel.....
i can't understand why this coil is mentioned as 4uh
I made a coil as mentioned by apex 12 turnes 1.2mm enamel copper wire but this is only 1.1uh(see photo)
The large coil is 4uh.I made this before i see Apex guides ,focusing on it's value
Hi sir ...zobel is another story.
Last photos are with Apex zobel.....
i can't understand why this coil is mentioned as 4uh
I made a coil as mentioned by apex 12 turnes 1.2mm enamel copper wire but this is only 1.1uh(see photo)
The large coil is 4uh.I made this before i see Apex guides ,focusing on it's value
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Many brand X amps out there use triac dc circuit and once triggered will pull the whole o/p to deck and blow the main primary fuse thus taking many good o/p's and damaging part of the amp circuit with it..
The good thing about using relay circuits it they don't waste o/p's via s/c due to dc faults this give's the tech time to check the faulty channel(s)..
The good thing about using relay circuits it they don't waste o/p's via s/c due to dc faults this give's the tech time to check the faulty channel(s)..
One amp I recall working on with triac dc speaker protection was the citronic ppx1200 with blown channel all ten to-3 mosfet's had been knackered due to the triac false triggering.. This amp had to be scraped due to cost of them heavy priced parts.
is the first time using such a circuit protection.
All my previous amplifiers have circuits with relay on outputs.
However, many fanatics with sound dislike relay in signal lines if one excludes the audio relays by amplimo.
Hi Mr these results is with R11 CHANGED TO 8K2
I can make the other modification(10pf) tomorow morning🙂
best regards.
some other photos from today tests.
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I fined no different's in sound quality/performance when one amp has relay latch to speaker or one amp using triac... the only thing is, one will blown fuses if triggered and the relay fitted circuit will safe guard costly speakers...still each to there own builds..
sr200 studio refer.
Tired with this amp but I believe worth it since the sound I heard was a top
Tired with this amp but I believe worth it since the sound I heard was a top
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sr200 studio refer.
I have not tried this
Have something in mind?
Thanks for replay.
I have not tried this
Have something in mind?
Thanks for replay.
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You added 10pF compensation and peaks are still there. Something behind is slow. Try remove c10/11 and increase added capacitor value (22p, 47p...). But be careful in view of oscillations.