Radio Shack Accurian Receiver, quality of amp? (pics inside) - diyAudio
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Old 14th August 2006, 03:16 AM   #1
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Default Radio Shack Accurian Receiver, quality of amp? (pics inside)

I bought this Accurian Powerline home amplifier from Radio Shack today. You are supposed to use it to transmit and receieve audio through your powerline. They clearenced it from $150 to $20, so I couldn't pass up the offer to listen to it. Anyway, when I got home I opened it up and noticed it is a rebadged ST&T iMicro 84. I removed the powerline receiver, and took pictures of the amp section. The toroid is 28v-0-28v, 2A. Anyone care to comment on the quality of this amp design?

Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.
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Old 14th August 2006, 03:54 AM   #2
singa is offline singa  Singapore
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Nice little amp, at 28V rails maybe 30w/channel with relays too but I don't think they are for speakers output. The TIP42Cs (power transistor) seem to be push to maximum mayde replacing with MJ15031 and it's complement will give better performance.
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Old 14th August 2006, 02:52 PM   #3
edl is offline edl  Hungary
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A BJT amp with 6800uF puffers and an 56V-CT mains trafo is able to produce 100W-RMS on 4ohm and 60W-RMS on 8ohm. But these output transistors wont survive a 4ohm speaker.
So that amp I think gives 60W on 8ohm, maybe 80W on 6ohm.
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Old 14th August 2006, 05:14 PM   #4
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Default Please, tschanrm...having schematic send it to me

As i have a bunch of those transistors shown in your nice images.

Very good images.

regards,

Carlos
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Old 14th August 2006, 05:15 PM   #5
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Default Nice images my friend.... pretty ones

Technical problems but good angle, good choice of angle to make the shot.

One more Artist in our communitty....good!

Having schematic or link to it, send informs please, to:

nanabrother@yahoo.com

regards,

Carlos
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Old 14th August 2006, 07:07 PM   #6
routhun is offline routhun  United States
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Default Nice internal layout

Internal layout is clean compared to other mass produced ones, even PCB looks decent and has torroid transformer too. I may get this one today. But it looks that this one is a good candidate for tweaking.
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Old 15th August 2006, 07:09 AM   #7
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Sorry Carlos, I don't have a schematic, as this is a mass produced component. Maybe you could try e-mailing St&t (www.stt.com.tw), the maker of this amp. Some listening observations:

There is no center marking on the bass/treble knobs, and also no center detent on the pots. This makes it hard to tell if the bass and treble are flat. You can solve this by completely bypasing the front knobs and just using this as a straight amp.

There is a slight ground hum, and I'm trying to figure out why that is. For $20, this makes a perfect garage stereo/ outside amp. I agree, this amp could be easily modified to sound better.
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Old 12th October 2006, 04:21 PM   #8
AIA is offline AIA  United States
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Default Accuriam Hotwire

Is there a way to convert this amp from receiving signals through the powercord to receiving signals through 'normal' inputs?
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Old 12th October 2006, 05:03 PM   #9
kec is offline kec  United States
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Quote:
Is there a way to convert this amp from receiving signals through the powercord to receiving signals through 'normal' inputs?
See this ... Input Mod

-Ken
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Old 12th October 2006, 10:56 PM   #10
BillH is offline BillH  United States
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Hi, all.

tschanrm, thanks for the tip. I just bought the last one for US$20 from the local RS store. It's either going to be connected to my computer or TV, I haven't decided yet. Here's a link to the ST&T spec sheet (.pdf file).

kec, thanks for the link to the mod. It's time to void the warranty.
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