Results 1 to 5 of 5

Thread: Revox B77 Reproduce amplifier

  1. #1
    Junior Member
    Join Date
    Oct 2017
    Location
    Croatia, VelikaGorica
    Posts
    3

    Revox B77 Reproduce amplifier

    Hi,
    I need help.
    I have Revox B77 2 track. I bought reproduce amplifier card 1.177.250-13 to recap it and then replace old in my RTR. Inside is card 1.177.250-12 and it is different. Does somebody know which is difference between them and are they interchangeble.

  2. #2
    Member
    Join Date
    Sep 2017
    Location
    Fort Worth, TX
    Posts
    22
    The 1.177.250-13 is IEC equalization, card 1.177.250-12 is the more common NAB equalization. Yes you can plug either card into your machine, this is the only way I know of to change playback equalization for model B77 and PR99. I have a few spare reproduce cards.

  3. #3
    Junior Member
    Join Date
    Oct 2017
    Location
    Croatia, VelikaGorica
    Posts
    3
    Thanks for help.
    I have another question . During playback from tape in record mode or playback mode there are some low frequency noises on right channel. These is reason why I'll wish to try to swap reproduce card. Do you have any experience with this?

  4. #4
    Member
    Join Date
    Sep 2017
    Location
    Fort Worth, TX
    Posts
    22
    Are the noises present through the head phone jack?
    There are so many causes for noise, make sure tape heads and guides are clean, make sure all PCB cards are seated tightly in its slot.
    Anthony

  5. #5
    Junior Member
    Join Date
    Oct 2017
    Location
    Croatia, VelikaGorica
    Posts
    3
    Yes the noise is present on headphone jack too. I'll check all PC Boards.
    Thanks.

Similar Threads

  1. Revox restorers?
    By ack in forum Reel To Reel Tape Deck and Content Forum
    Replies: 13
    Last Post: 09-04-2017, 11:42 AM
  2. New Revox Reel
    By dminches in forum Reel To Reel Tape Deck and Content Forum
    Replies: 52
    Last Post: 05-13-2016, 12:41 PM
  3. Revox A77 HS won't start
    By F456GTM in forum Reel To Reel Tape Deck and Content Forum
    Replies: 8
    Last Post: 12-16-2015, 09:37 AM
  4. Upgrade to Reproduce card & Stabilizer card
    By audioblazer in forum Reel To Reel Tape Deck and Content Forum
    Replies: 3
    Last Post: 09-04-2015, 07:43 AM
  5. What is the weakest link to reproduce complex passages?
    By caesar in forum General Audio Forum
    Replies: 17
    Last Post: 12-13-2011, 06:22 AM

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
  •