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Recent content by roberth5

  1. roberth5

    Conference Feedback / Poor Speakerphone Function

    Partner 18D Phone, ACS Processor, 2ea. 206 and 1ea. 400. I have not measured the loop current yet. I will break out the Fluke on next visit. I did place two (2) 100 ohm resistors in series with the Pots line, no help. However, if I placed a 100-ohm ACROSS the line (momentarily), feedback...
  2. roberth5

    Conference Feedback / Poor Speakerphone Function

    For some time now I have had a feedback problem on conference calls and the speakerphone function has been poor on a (former Partner II, now ACS) system I installed in a real estate office in the Metro Detroit area. I up-graded from a Partner II to an ACS R5, and the problem persists. Whenever...
  3. roberth5

    206 power supplies

    Chris: I hate to throw things away that can be fixed, I will go to MCM's site and see if I can find some of those transistors. However, first I am going to try to draw out that supply circuit, see if I can get some measurements from a working supply, test some of the higher current components...
  4. roberth5

    206 power supplies

    I have stacked up a few , well several failed 206 power supplies. I use to be a Motorola RF two-way tech for many years, so I would like to fix them, anybody have schematics or recommendations. I.E. a source for those little fuses, better transistors (FETs), etc. Thanks, Robert
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