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Vintage 1980s Archer Tandy Telephone Listener Amplifier Model 43-231A - $15 (Avon Lake)
638 Moore Rd near Unit C
condition:
good
make / manufacturer:
Archer RadioShack
model name / number:
Telephone Listener 43-231
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The pick up coil will work with any magnetic speaker or driver similar to the land line phones of the past. The item is fully operational. We are including the period correct proper 9 volt Radio Shack Adapter with a 2.5mm phone plug. This adapter utilizes a very small (3/16 or 2.5mm NOT 3.5 or 1/8" ) connector and they are very hard to find. It was specifically made with two different sizes input jacks so that the user would not plug the 9 volt charger into the phone pick-up coil jack and damage the unit. Please see the photos.
For the technically inclined folks this device uses a Texas Instruments (National Semi) 8 Pin Dip LM386 Single Channel Audio Amplifier (see photo). This chip has a very wide range of operating voltage. It had decent specifications and the ability to drive a variety of speaker impedances. It's a simple, readily available, low-power audio amplifier IC that requires minimal external components to function. The LM386 was introduced in 1983 by TI and I expect this device was one of the many that utilized these
Cash Sale No Holds Call or Text For Pick up.