Support Unterstützung u. techn. Daten

Ist alles was ich so schnell fur dich finden konnte!

DIORA WS 504 2x 100W 4x IN, 4x repro, Phono, korerkce trable + bass, monitor/EQ IN/OUT, IR dálkové ovládání

1982-1986 DIORA Dzierzoniow, Poland
Design Engineer
· Designed analog and digital circuits for home entertainment products including low noise audio and RF circuits.


EDUCATION

WROCLAW POLYTECHNIC INSTITUTE, Wroclaw, Poland Master of Science: Electronics, 1980 Major: Electronic Acoustics
WROCLAW POLYTECHNIC INSTITUTE, Wroclaw, Poland Bachelor of Science: Electronics, 1978
· In 1997 completed Bruel & Kjaer Seminar "Electroacoustic Measurements on Telephones"
· In 1995 conducted Engineering Seminar "Microphone Cartridges & Noise Cancellation Techniques"


ADDENDUM - ADDITIONAL DESIGN ACCOMPLISHMENTS

· Circuit for precision DCR test of powered transformers.
· Circuit to test eight transformer parameters simultaneously. Reduced test time sixty times and eliminated error sources.
· Ultrasound distance meter with precision compensation of sound speed variables.
· Circuit to switch between sensors in a car from telephone keypad.
· Test fixture for phase mismatch of two sound sources.
· Evaluated shielded cables for shield resistance noise, shield capacitance noise, shield vibration noise, shield protection against hum and RF field.
· Circuit to detect microphone presence at one of many inputs, that automatically activated right signal path.
· RF Booster audio circuitry providing high CMRR for fax signal.
· Hand held probe with ultra low noise circuitry to measure low level signals across capacitors.
· Ultra low noise preamplifier to boost level of B&K microphones and allow recording of very quiet sounds.
· Various fixtures for measurement of noise canceling microphones on the flying airplane. Measured on the airplane variety of telephone handsets with different microphone model and polar pattern each one.
· Telephone handset consisting cardioid microphone and dispatch speaker.
· Simulated, redesigned circuitry and measured level, frequency response to unify many telephone systems, platforms for various vehicles and various microphones.
· Evaluated various telephone handsets from many countries in order to select the best handset for newly designed satellite system.
· Measuring setup for DSP group to allow audio performance evaluation for DSP solutions.
· Recommended audio solutions and interface circuit detail to be required and incorporated into future micropower Codec chips.
· Test technique, fixtures for quick evaluation of acoustical resistance, wind, dirt and water screen materials.
· Test technique, fixtures for level, frequency response repetition of ringers, speakers and microphones.

MISSION CRITICAL PROJECTS

· Cellular phone entering production distorted sound under certain conditions. Various teams investigated distortion for weeks with no success. Solution: In a few hours found that piezzo speaker distorted only when high level combined with certain words. Replaced speaker with another model and distortion stopped.
· Production phone with poor yield had no access to audio signals. Various attempts to troubleshoot rejected phones failed and finally production stopped. Solution: Within 2 days designed and built a fixture acting as reference phone with zero tolerances. Testers checked level by comparing phones to reference phone and production continued.
· Engineering samples of hand held, noise canceling microphone sounded different each one and customer could not place an order. Solution: Within hours found varying quality of acoustical screen in front of microphone port. Selected right screen material to fix a problem. Customer placed an order and microphone went to production.
· Customer reported echo from production phone. Solution: Investigated the phone, within hours found microphone housing weakness and proposed to increase microphone port size, thus increasing sound level and boosting signal to echo ratio. Improvement satisfied customer and more orders followed.
· Customer reported echo problem with telephone handset entering production. Solution: Immediately found electrical echo signal developed across handset cable resistance. Proposed adding spare wire to active wire, reducing resistance on signal path and lowering echo signal to satisfying level. It allowed design team meet schedule and cost.
· Satellite System designed to support election overseas could not be shipped due to blowing fuses during power up. Design team could not fix a problem with 48 hours left. Solution: Analyzed schematic diagram. Immediately found that FET input capacitance was not included into charge scheme during powerup time. Proposed new values for near resistors and capacitors to fix a problem. Within 4 hours a few units were modified, checked and ready to ship.
· Docking Station for automotive phone generated variety of audible noise, design team worked months with no success. Solution: Modified circuit gain distribution, changed op amps bias circuitry and interface configuration. Eliminated all noise within a week, and design team met projected budget plus schedule.
· Dual Mode Phone generated audible noise, detected just before scheduled production. Solution: Immediately located noise source, modified pc board layout, op amps bias circuitry and phone interface circuitry. Noise went down to acceptable level, allowing the phone enter production.
· Marketing changed transmit response requirement for telephone handset entering production, with expected redesign & retooling time a month. Solution: Immediately investigated a problem and proposed new shape microphone port. Existing tooling required only minimal modification and the handset met tight schedule.
· Telephone Handset production could not move to Mexico due to poor production yield. Solution: Immediately found that vendor unsoldered microphone pads to remove solder, creating holes on microphone back and distorting frequency response plus level. Offered new procedure for vendor that fixed a problem.
· Cellular phone with dispatch speaker caused distortion when its speaker sounded loud. Radio frequency reference device vibrated from speaker sound and modulated RF signal, thus causing distortion. Solution: Investigated vibration spectrum. Immediately developed custom test signal for speaker. RF team used such signal as the only troubleshooting technique available to compare various solutions and make design decisions resulting in distortion free phone.

Hey, hab mich da auch mal ein bisschen umgesehen. Diora hat hierzulande einen Verstärker vertrieben, den WS 504, der kam ende der achziger in div. Magazinen auch ganz gut weg. Die Firma kommt aus Polen und fertigt noch immer.
Hier der Link

http://diora500.webpark.pl/

Tut mir leid die Firma hat nach Informationen der polnischen Firma "Unitra" Dicht gemacht!
Shit
Hab selber einen alten Verstärker von Unitra Diora, und der ist net im besten Zustand brauche ersatzteile!

Gruß Osi

jetzt mal ne gaaaaaanz späte antwort

also ich ahbe den ws 504 selber un der hat mehr power als 2x100w ich betreibe danit meine 2x400watt pa boxen
also ich glaub der hat 2x350watt (das glaube ich)