Zombiethread I would like photos of this mess- did the supply only require the "main" supply at the back of the chassis (below the connectors), then wiring up of the inputs as labeled? It wouldn't suck to have a 5ch amp with all that real estate inside- I could throw a minidsp in there, pot on the front, and have an active stereo 2 way control center.
I hacked it apart today, but stopped short of kiboshing the amp board along the side, or either of the power supply boards. I guess I'd have to work the on/off logic back out though (or bypass it), since I shredded the front circuitry removing it. Initial intent was to salvage the chassis only, but if I can get the amp section alone back working....
Stupid baddy forgot to re-read the thread and pick up the 5V.
The 5V is in place and all channels work- for now. I'll have to let it run to find out if the squeal was preamp section.
Further testing is warranted!
Huzzah!
The 5V is in place and all channels work- for now. I'll have to let it run to find out if the squeal was preamp section.
Further testing is warranted!
Huzzah!
Forgot I've ever owned some of these until this thread popped up again. I managed to kill two boards trying to use them outside the case. I don't recall what exactly went wrong, that was a long time ago.
i recased three of these amp boards on your directions Anonymous - worked fine!! Sold/gifted them away. The whole shaebang fit perfectly in a gutted carver AV 405 5 channel amp chassis....
They were nice sounding units when modded - new input caps (did not work at all with no input caps) and limit resistors raised....they were quite powerful.
They were nice sounding units when modded - new input caps (did not work at all with no input caps) and limit resistors raised....they were quite powerful.
Yeah, like I said, I don't remember what I did wrong. Probably something simple and stupid. I think I still have the boards in a bin somewhere; I've pulled various parts off of them over the years. Still have the transformers sitting here.
Interesting thinking back to when I bought these and all the other projects I've done since. Ended up burning myself out in the long run. I have shelves full of parts, enough to build at least a dozen amplifiers, yet my speakers sit with nothing connected to them. :/
Interesting thinking back to when I bought these and all the other projects I've done since. Ended up burning myself out in the long run. I have shelves full of parts, enough to build at least a dozen amplifiers, yet my speakers sit with nothing connected to them. :/
I found that 2 of my channels had cracked wirewound resistor casings- heat damaged I believe. might check there.
Yup, same here - but I ave gone in a little different direction - new thing now is Electrostatics and planars in addition to amps. Two Krell KSA-50 Clones, Alephs, Quicksilver 8417 tube amp Clones, Leach amp, JLH, ICEpower amps, Power physics modules, yikes.
My Office is filled with electronic crap - discarded plasma / LCD TVs, amps, electrostatic panels from ML and Acoustat, Magnepan Tympani panels...I have turned into a "Audio Hoarder"...
My Office is filled with electronic crap - discarded plasma / LCD TVs, amps, electrostatic panels from ML and Acoustat, Magnepan Tympani panels...I have turned into a "Audio Hoarder"...
You probably wouldn't even miss some of that hoard if you shipped dormant items off to some of us willing to burn the dust off, would you, John...
😀
😀
Preaching to the choir, son. 😀
I have a Hitachi HMA-6500 power amp I bought from a local kid on craigslist that I have not used more than 5 hours in 5 years, but i cannot bring myself to get rid of it, nor actually use it. ADS woofers with unknown T/S parameters from speakers I never had... Silk dome tweeter massive motor assemblies from a 30-years-dead transmission line speaker company... The first pair of woofers I ever refoamed... What a maroon. 😀
I have a Hitachi HMA-6500 power amp I bought from a local kid on craigslist that I have not used more than 5 hours in 5 years, but i cannot bring myself to get rid of it, nor actually use it. ADS woofers with unknown T/S parameters from speakers I never had... Silk dome tweeter massive motor assemblies from a 30-years-dead transmission line speaker company... The first pair of woofers I ever refoamed... What a maroon. 😀
Parts of my apartment and the vast majority of my garage is hoarders worthy. Though, having bags of different caps payed off with the DCP-501 because I had 2.2uF stacked panasonic films at 63V (so they're small enough to stick on the board, and still fit in the original chassis location) to replace the turd input caps with.
That's why I save this stuff- you never know!
Anyone doing a panny mod can have a set of 5 of these, just send your addy and they're yours.
That's why I save this stuff- you never know!
Anyone doing a panny mod can have a set of 5 of these, just send your addy and they're yours.
With winter coming maybe I can get back in the swing of things.
I have three AudioSource AMP7-T amps that have been sitting in DIY limbo for like 6 years. I think only one can be brought back to life with its original amp board as I only have one working TA104A. I'm going to try any get irfb4227 mosfets running in it without killing the last module. The other two units will get retrofitted with other tripath boards.
I have three AudioSource AMP7-T amps that have been sitting in DIY limbo for like 6 years. I think only one can be brought back to life with its original amp board as I only have one working TA104A. I'm going to try any get irfb4227 mosfets running in it without killing the last module. The other two units will get retrofitted with other tripath boards.
Ha, that was one Tripath chpset I never heard. If you get one working let me know - I have a couple ICEPpower 200ASC modules and Power Physics modules to trade if your interested...
IMO, the TA10xA series from Tripath are the least desirable. They're the noisiest of them all and prone to self destruct for no good reason even in proper designs.
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I got proper RCAs mounted and everything is running nice- one note, the failures anon has had, may be related to running the amp board horizontally- both the chip and the mosfet heatsinks want to be vertical for best results. Since he used added heatsinking on the main panel, I'd expect it might be the chips, whose power dissipation doesn't vary with output (or shouldn't significantly vary with output).
Na, it wasn't a heat issue; they were never on long enough for that to be a problem. I think it was a ground problem.
I see- was it in standby or fully off? I think the dissipation is same in standby (switched on the 5V)
Hey Anon- What happened with the parallel inputs? I saw that you had an issue with this, but I tried paralleling 2 inputs (on separate speaker loads) and there was no issue- were you trying to up the output current by paralleling both input and output, or were you running a mono input to multiple speakers (each off its own Tripath section)?
It happened when powering them on cold. The board and power supply were completely out of the chassis which I think contributed to the grounding problem. That was a long time ago though, guess it doesn't really matter now.