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Old 13th September 2007, 03:42 AM   #1
gni is offline gni  United States
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Default Radio Shack Digital Wireless Audio Link Modifications

Radio Shack Digital Wireless Audio Link
CAT. NO. 15-1974

I am trying to modify this unit by taking out the wireless receiver
and replacing it with line level inputs . . .I've already done this
to the Accurian Receiver(great thread in DIY Audio).

Unfortunately, by pulling the "wireless" receiver there is not a
simple place to plug in. There is a double row socket of 32 each.
They are labeled. Some are even labeled L Audio, GND, A Mute,
etc. I will upload a picture tomorrow.

I tried connecting to the L Audio and GND connection, but no sound.
There is DC offset on both channels. . . .so the signal is just not
getting past the socket to the Amplifier.

The amplifier is a TDA7265 with the -20V on the heat sink.
There is a Mute/Standby function on the chip and I think this
is what is preventing it from working. Based on the +V supply,
the voltage needs to be -6V from that value across pin 5 to get
the amp to fire up.

Once I figure this out, I think I will be able to get the amp fired
up and running.

If anyone has had experience with the TDA7265 or this type of
modification, I would greatly appreciate it.
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Old 13th September 2007, 02:31 PM   #2
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Pictures of Interior
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File Type: jpg rs_wirelessa.jpg (86.1 KB, 241 views)
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Old 13th September 2007, 02:32 PM   #3
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Closeup of connector
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File Type: jpg rs_wirelessb.jpg (94.9 KB, 192 views)
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Old 13th September 2007, 06:34 PM   #4
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I got the system working.

Just needed to hook up to the real ground 'G2' not the one
labeled 'G' next to L 'Out' and 'R Out'

Should I add an input capacitor to block DC?
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Old 14th September 2007, 01:01 PM   #5
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UPDATE.

Sounds good (not great), but better than the Accurian™ HomePlug® Digital Audio Receiver/Amplifier from another thread.

The Accurain is a multichip amp while this one is a single chip TDA7265

Played for about 5 hours yesterday at moderate volume on a full
range speaker. . .
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Old 26th July 2008, 10:06 PM   #6
gni is offline gni  United States
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Just pulled it out of the box and fired it up again. . . still sounds
great. . . not as easy to mod as other RS amplifier but sounds
better overall. . .quieter. . .
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Old 19th October 2013, 03:29 AM   #7
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I realize this is a really old post but just picked up one of these units at a garage sale and was wondering exactly how you got by the mute/standby function.
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