We hate 2020!

Just when we thought 2020 couldn't get any worse! We were about to re-open after many months of being closed but then disaster struck when a mains water pipe burst and flooded much of the ground floor of the museum.
Sadly re-opening has now been postponed. Read More >>>

Please Donate Via Just GivingNo visitors, no workshops, no events, no school visits... no income. We know that things are tough for everyone right now, but if you can afford to help us through these tough times please donate what you can.

There's over 36,000 exhibits here! That should keep you occupied for a bit - get searching!

Or come and get involved on our social media channels ...

      Twitch  Facebook          Online Gift Shop      

Thank you.

Tandy Radio Shack TRS-80 Acoustic Modem

Acoustic Coupler AC-3

A standard telephone handset was placed into a cradle of the acoustic modem that had been engineered to fit closely (by the use of rubber seals) around the microphone and earpiece of the handset. A modem would modulate a loudspeaker in the cup attached to the handset's microphone, and sound from the loudspeaker in the telephone handset's earpiece would be picked up by a microphone in the cup attached to the earpiece. In this way signals could be passed in both directions.

Sold for $149.95. Advertised as being ideal for travellers! Just dial the desired number and place handset on interface. Half duplex also. Sensitivity: -43 sBm. 2-3/8 x 4-3/4 x 10-1/4".

Catalogue No: 26-1174-A
Serial No: 119558

Comes with 'TRS-80 Acoustic Modem Operation Manual Catalog Number 26-1174A'.

Our Model kindly donated by Peter Martin.

 

Date : 1985

Manufacturer : Tandy

Physical Description : Acoustic modem AC adaptor Operation Manual

This exhibit has a reference ID of CH13105. Please quote this reference ID in any communication with the Centre for Computing History.
 

Scan of Document: Tandy Radio Shack TRS-80 Acoustic Modem

Click on the Image For Detail






Help support the museum by buying from the museum shop

View all items

Founding Sponsors
redgate Google ARM Real VNC Microsoft Research
Heritage Lottery Funded
Heritage Lottery Fund
Accredited Museum