Results 1 to 2 of 2

Thread: Weird old MOSFET AMP?

  1. #1
    diysmps Member* MyFirstSMPS's Avatar
    Join Date
    May 2012

    Weird old MOSFET AMP?

    Can anybody of anything to talk about this weird Amplifier?
    I got some specimen. It is some kind of 100V line amplifier, but there is no information even on the internet.
    And I also ask here - maybe someone knows something?
    Amplifier has made an interesting - its input stage is used integral amplifier TDA2030, the power stage operating only N-Channel L-FETs, namely Hitachi 2SK135, they are 6pcs in each amplifier, is it a MONO-amplifier.
    The back panel is marked with the manufacturer: Communication & Control ENG CO. Park Road Calverton Nottingham England.
    Model: Power Amplifier TYPE 770/200M/A/382.

    I check the MOSFETs and they are all good. It is also the output transformer, maybe they can use without rework in a tube amplifier?
    Or can anyone here to talk about this amplifier?

    I do not have a schematic - so please don`t ask it
    Attached Images Attached Images

  2. #2
    diysmps Senior Member
    Join Date
    Oct 2011
    Kuala Lumpur, MY
    Classic amp for speech, and of course they r mono, its not design for music, its design for clear speech. output trafo good for horn speaker .

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts