Welcome to Australia's only Vintage Radio and Television discussion forums. You are not logged in. Please log in below, apply for an account or retrieve your password.
Australian Vintage Radio Forums
  Home  ·  About Us  ·  Discussion Forums  ·  Glossary  ·  Outside Links  ·  Policies  ·  Services Directory  ·  Safety Warnings  ·  Tutorials

Tech Talk

Forum home - Go back to Tech talk

 STC 549 Radio schematic
« Back · 1 · 2 · Next »
 Return to top of page · Post #: 16 · Written at 11:29:09 AM on 22 June 2021.
Telftn's Gravatar
 Telftn
 Location: Wallan, VIC
 Member since 21 June 2021
 Member #: 2452
 Postcount: 9

Got it. Many thanks again.
 
 Return to top of page · Post #: 17 · Written at 9:03:30 PM on 25 June 2021.
Marcc's avatar
 Marcc
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5254

I would support the STC Circuit issue. Copped a chassis 59 that had been hacked, even the HRSA could not find a circuit & STC only used it in one model.

I ended up restoring the hacked bias chain as per a 58a I think (recorded) found a factory lead dress issue and ended up reducing the bias on IF 6D6 (aka 6U7) to stop it overloading the plate detector (that in conjunction with an Oscilloscope).

I drew up the circuit I ended up with & sent it to HRSA & Kevin Chant, with appropriate warnings on changes, & how the circuit was derived.

Marc
 
« Back · 1 · 2 · Next »
 You need to be a member to post comments on this forum.

Sign In

Username:
Password:
 Keep me logged in.
Do not tick box on a computer with public access.

Vintage Radio and Television is proudly brought to you by an era where things were built with pride and made to last.

DISCLAIMER: Valve radios and televisions contain voltages that can deliver lethal shocks. You should not attempt to work on a valve radio or other electrical appliances unless you know exactly what you are doing and have gained some experience with electronics and working around high voltages. The owner, administrators and staff of Vintage Radio & Television will accept no liability for any damage, injury or loss of life that comes as a result of your use or mis-use of information on this website. Please read our Safety Warning before using this website.

WARNING: Under no circumstances should you ever apply power to a vintage radio, television or other electrical appliance you have acquired without first having it checked and serviced by an experienced person. Also, at no time should any appliance be connected to an electricity supply if the power cord is damaged. If in doubt, do not apply power.

Shintara - Keepin' It Real · VileSilencer - Maintain The Rage