In 16 years  up to 1997  I worked at " Stento / Stentofon ", an  international communication production company  with its main office , at that time in Trondheim , Norway.  I was  working as a Composer of customer- specified systems  / service engineer  / unit repairman  with : Audio paging  , Public address systems ( PA systems  from "Dynacord" , "Millbank"  , "Philips" , "Steenhans" , "Stentor" & more ) , Compact/MPC/VMP intercom systems , and after 1992 AlphaCom/ACM intercom systems,  Marine products from "Vingtor Marine" , now  named "Zenitel Marine" ( Stentofon inside ) on ships - catamarans  - ferries. , Telecourier wireless paging , Stentofon Nurse call systems , Industrial communication & more .  

The customer specified system made for:  "Stena-Traveller / TT Traveller" and the "Stena Challenger / Stena Fantasia" , now named " MV Leif Ericson" , in , Marine Atlantic, Canada is an early example of my work in middle 80'ties.

From 1997 > : I'm a self employed service engineer  in my own company " Jo Tech Service , Lykkmarka 53 , 7081 Sjetnemarka , Norway " , working with the same products & more .  Even to day repairing old or obsolete electronic boards from the Stentofon TouchLine MPC & Compact 16-32 / Vingtor  VMP-series intercom exchanges is a big part of the work .

Joar Falstad,

Personal data:   Born year : 1946 ,  Hobby = Work ,  No plans of retirement yet.

Our latest products / updates:   < /strong >

Professional PA system controller, using Advantech USB-4751.   Addressed Microphone Manager,  Addressed Voice Alarm System, Addressed Prerecorded messages, Addressed Announcing System / Spot Announcing Machine, Addressed Program Distribution.  Read more / schematic example / download a working demoprogram.  

Next version of this program can use a 16 channel speaker loop impedance controller.   loop impedance control.png