Revox B77 Reproduce amplifier

rory957

New Member
Oct 22, 2017
3
0
0
Croatia, VelikaGorica
#1
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.
 

Scar972

New Member
Sep 1, 2017
27
0
0
Fort Worth, TX
#2
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.
 

rory957

New Member
Oct 22, 2017
3
0
0
Croatia, VelikaGorica
#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?
 

Scar972

New Member
Sep 1, 2017
27
0
0
Fort Worth, TX
#4
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
 

About us

  • Founded in 2010 What's Best Forum invites intelligent and courteous people of all interests and backgrounds to describe and discuss the best of everything. From beginners to life-long hobbyists to industry professionals we enjoy learning about new things and meeting new people and participating in spirited debates.

Quick Navigation

User Menu

Steve Williams
Site Founder | Site Owner | Administrator
Ron Resnick
Site Co-Owner | Administrator
Julian (The Fixer)
Website Build | Marketing Managersing