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Author Topic: Stax SRM-002 amplifier mod (SRS-002 mod)  (Read 1214 times)

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CEE TEE

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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #10 on: April 27, 2015, 01:24:47 AM »
^I love my Hakko.  Can't blame the Hakko for my hack-job.
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zerodeefex

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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #11 on: April 27, 2015, 02:36:32 AM »
what hakko are you using? One of the interns has been borrowing my fx888d for too long. I need to recover it.
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CEE TEE

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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #12 on: April 27, 2015, 04:15:37 AM »
Hakko FX-888D.  Great soldering station and looks the biz too!
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audiofrk

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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #13 on: April 27, 2015, 04:39:40 AM »
How much better is it than cheaper options for soldering kit's
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audiofrk

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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #14 on: April 27, 2015, 06:02:19 AM »
hey bill,

whats that yellow thing next to the caps in the sixth pic? It looks a little like a transformer.
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Bill-p

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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #15 on: April 27, 2015, 06:14:49 AM »
Nice catch.

It is a transformer. It's used to internally boost either the batteries or the wall wart up to snuff. Since you're only getting 3V from the batteries, or 4.5V (more like <4V) from the wall wart.

I suspect that "eco mode" bypasses the extra regulation afterward to smooth out oscillation, so without that, the high-pitch whine is coming from the transformer. <- probably just silly blabbing from a wannabe engineer, so I think someone more qualified will have to correct me on this one.
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Anaxilus

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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #16 on: April 27, 2015, 04:13:27 PM »
Almost makes me wish I kept my 002 as it had no whine in Eco Mode.
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zerodeefex

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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #17 on: April 27, 2015, 04:17:35 PM »
Almost is the key word :). Doubt you'd use this fucker much if ever even with a much better amp. Remember I ran mine out of a KGSSHV and despite it scaling quite well, it still never captured head time.
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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #18 on: April 27, 2015, 04:24:59 PM »
Quote from: zerodeefex on April 27, 2015, 04:17:35 PM
Almost is the key word :). Doubt you'd use this fucker much if ever even with a much better amp. Remember I ran mine out of a KGSSHV and despite it scaling quite well, it still never captured head time.

Yeah, I would only use it for it's zero isolation to hear PA announcements at the airport or other similar circumstances.
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Re: Stax SRM-002 amplifier mod (SRS-002 mod)
« Reply #19 on: April 27, 2015, 06:34:09 PM »
Quote from: Bill-p on April 27, 2015, 06:14:49 AM
Nice catch.

It is a transformer. It's used to internally boost either the batteries or the wall wart up to snuff. Since you're only getting 3V from the batteries, or 4.5V (more like <4V) from the wall wart.

I suspect that "eco mode" bypasses the extra regulation afterward to smooth out oscillation, so without that, the high-pitch whine is coming from the transformer. <- probably just silly blabbing from a wannabe engineer, so I think someone more qualified will have to correct me on this one.

Wait high pitch whine? I thought transformers where super quite that's why everyone says there great in a power supply.
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