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

 AIRZONE MODEL 101 CH = 4A1D1
« Back · 1 · Next »
 Return to top of page · Post #: 1 · Written at 4:17:41 PM on 19 February 2026.
Bowler's Gravatar
 Bowler
 Location: Bongaree, QLD
 Member since 26 October 2018
 Member #: 2308
 Postcount: 107

Good Afternoon all, does anyone have a circuit for a Airzone model 101. The valve line up is 6X5, EL34 EBC35 AND 6A8. A CIRCUIT FOR THIS OR ONE CLOSE TO IT WOULD BE APPRECIATED. bowler
 
 Return to top of page · Post #: 2 · Written at 10:24:57 PM on 19 February 2026.
Marcc's avatar
 Marcc
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5688

Have a circuit for A101 and A41A1

That tube lineup does not match either. It has all Philips tubes and the RF ones will have pin one grounded for Philips metalized tubes.

What I see is a reflexed set front end with ECH 33 or ECH 35; EBF35; EL33-A; 6X5.

The circuit for the pentagrid is drawn crazy as its a Triode Heptode; 6A8 is a Heptode, they will normally work in one another's socket but not with the same results.

Cannot find a reference to EBC35
 
 Return to top of page · Post #: 3 · Written at 10:26:23 AM on 20 February 2026.
Bowler's Gravatar
 Bowler
 Location: Bongaree, QLD
 Member since 26 October 2018
 Member #: 2308
 Postcount: 107

Hi Mark, suffered a seniors moment when posting my thread, the EBC35 AS MENTIONED is indeed an EBF35. Thanks for your help.
 
 Return to top of page · Post #: 4 · Written at 10:57:19 AM on 20 February 2026.
Robbbert's avatar
 Robbbert
 Location: Hill Top, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 2246

EL34 sounds like an odd choice - it's a 6CA7 which is a high-end output valve for guitar amps etc. Did you mean EL33 ?
 
 Return to top of page · Post #: 5 · Written at 3:59:08 PM on 20 February 2026.
Bowler's Gravatar
 Bowler
 Location: Bongaree, QLD
 Member since 26 October 2018
 Member #: 2308
 Postcount: 107

Yes Robert, the valve is an el33a, not an el34
 
« Back · 1 · 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