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

General Discussion

Forum home - Go back to General discussion

 Philips Radioplayer 4462
« Back · 1 · 2 · Next »
 Return to top of page · Post #: 16 · Written at 1:04:23 PM on 21 December 2018.
Ian Robertson's Gravatar
 Ian Robertson
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2372

OK, if the AGC goes LESS negative and the set gets louder, something is leaking it away.

Check the voltage at the diode load (volume pot end to end?). If it's much MORE negative than the AGC line, you have a leak. Obvious candidate is a paper cap. But it could also be one of the valves on the AGC line drawing a little grid current.

If the cap is OK (read "new"), well, that's all that's left. A bit of gas in a valve will sometimes do this.
 
 Return to top of page · Post #: 17 · Written at 10:17:51 AM on 23 December 2018.
Kxdniu's Gravatar
 Kxdniu
 Location: Melbourne, VIC
 Member since 19 May 2014
 Member #: 1577
 Postcount: 101

Thanks guys.

The shields all tested ok.

Will try to get a 6J8G.

All caps in the AGC have been changed.

Cheers
Kevin
 
« 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