Radio Shack Digital Wireless Audio Link Modifications

gni · 13th September 2007, 04:42 AM

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.

gni · 13th September 2007, 03:31 PM

Pictures of Interior

gni · 13th September 2007, 03:32 PM

Closeup of connector

gni · 13th September 2007, 07:34 PM

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?

gni · 14th September 2007, 02:01 PM

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. . .

gni · 26th July 2008, 11:06 PM

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. . .

13th September 2007, 04:42 AM	#1
gni diyAudio Member Join Date: Sep 2006	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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13th September 2007, 07:34 PM	#4
gni diyAudio Member Join Date: Sep 2006	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?

14th September 2007, 02:01 PM	#5
gni diyAudio Member Join Date: Sep 2006	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. . .

26th July 2008, 11:06 PM	#6
gni diyAudio Member Join Date: Sep 2006	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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