Results 1 to 2 of 2

Thread: Dean Markely RM80-DR

  1. #1
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Location
    Wernersville, PA
    Posts
    12,787
    Thumbs Up/Down
    Received: 428/2
    Given: 224/0
    Rep Power
    25

    Dean Markely RM80-DR

    I have an RM 80 on the bench that someone tried to repair.

    Hoo Boy!

    Anyway, the only schematic out there is not what I have in front of me.
    There is a strange two transistor circuit hanging off of the input signal at pin 6 of the TL072.

    RM80-DR.pdf

    Does anyone have a clue what this supposed to do?

    Note: when they added this circuit they dropped the ground connection at pin 7 after the 10 ohm resistor.

    0 Not allowed! Not allowed!
    Last edited by Jazz P Bass; 07-08-2019 at 05:45 PM.

  2. #2
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Location
    Wernersville, PA
    Posts
    12,787
    Thumbs Up/Down
    Received: 428/2
    Given: 224/0
    Rep Power
    25
    I noticed the ground connection was missing on my drawing of the PNP transistor.

    RM80-DR Input Revision.pdf

    0 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Dean Markley RM-80-DR schematics
    By wakehart in forum Schematic Requests
    Replies: 5
    Last Post: 07-03-2019, 03:48 PM
  2. Dean Markley rm-80-dr
    By twombstone in forum Schematic Requests
    Replies: 3
    Last Post: 07-01-2019, 08:28 AM
  3. Dean Markley CD120
    By Billy Penn in forum Maintenance, Troubleshooting & Repair
    Replies: 22
    Last Post: 07-11-2015, 04:18 PM
  4. Dean Markley Signature 120
    By goldtop5 in forum Schematic Requests
    Replies: 1
    Last Post: 05-01-2015, 02:06 AM
  5. Dean Markley CD-120
    By Rhodesplyr in forum Guitar Amps
    Replies: 0
    Last Post: 07-27-2009, 07:05 PM

Bookmarks

Posting Permissions

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