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 Return to top of page · Post #: 1 · Written at 3:48:24 PM on 3 November 2016.
PKO's Gravatar
 PKO
 Location: Valla, NSW
 Member since 1 November 2016
 Member #: 2000
 Postcount: 8

Hi,

I recently got my hands on a Kriesler 11-20 that had been sitting in a shed in Sydney for many years. It was covered in dirt, but when I cleaned up the exterior it seemed to be in good condition, with all the bits there and nothing broken. I turned it on and amazingly it still works fine.

I want to restore it but I'm quite new to this. I'm an Electrical Engineer so am not worried about being able to do this, but I was wondering how to get my hands on a circuit diagram and component list. Can anybody help with this?


 
 Return to top of page · Post #: 2 · Written at 6:46:51 PM on 3 November 2016.
JFB's Gravatar
 JFB
 Location: Milton, NSW
 Member since 27 June 2016
 Member #: 1945
 Postcount: 35

I suggest as a first step a visit to Kevin Chant's web site http://www.kevinchant.com/11--series.html and as a second, a read of any number of the restoration threads on this web site.


 
 Return to top of page · Post #: 3 · Written at 6:55:18 PM on 3 November 2016.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1043

A direct link to the 11-20 here:

http://www.kevinchant.com/uploads/7/1/0/8/7108231/11-20.pdf

There could be variations with this model. I'll check later.


 
 Return to top of page · Post #: 4 · Written at 7:48:45 PM on 3 November 2016.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 5262

Welcome to the site.

a Kriesler 11-20 that had been sitting in a shed in Sydney for many years. I turned it on and amazingly it still works fine.

Consider yourself lucky. Powering up an old and long unused radio is not advisable. Some associated hazards are exploding filter capacitors or burned out secondary winding of the power transformer due to shorted filter capacitors.


 
 Return to top of page · Post #: 5 · Written at 12:59:06 PM on 4 November 2016.
PKO's Gravatar
 PKO
 Location: Valla, NSW
 Member since 1 November 2016
 Member #: 2000
 Postcount: 8

Thanks to all of you. I followed the link and downloaded the 11-20 data - very useful. From the valve set up and dial glass it appears that I have the 11-20K, but the difference between the K and M isn't obvious to me. Can anybody help?


 
 Return to top of page · Post #: 6 · Written at 1:15:22 PM on 4 November 2016.
MonochromeTV's avatar
 Location: Melbourne, VIC
 Member since 20 September 2011
 Member #: 1009
 Postcount: 1043

The 11-20 variants goes up to 11-20O.

The 11-20K & 11-20M are electrically identical. The only differences between the two is the position of the coils.


 
 Return to top of page · Post #: 7 · Written at 8:55:36 AM on 7 November 2016.
PKO's Gravatar
 PKO
 Location: Valla, NSW
 Member since 1 November 2016
 Member #: 2000
 Postcount: 8

Thanks for that info - much appreciated


 
 Return to top of page · Post #: 8 · Written at 6:41:41 AM on 21 December 2016.
PKO's Gravatar
 PKO
 Location: Valla, NSW
 Member since 1 November 2016
 Member #: 2000
 Postcount: 8

The restoration is going well. I have managed to source all valves and components I need. The transformer has Megger tested OK at 500V. The radio has cloth of some type over the speaker vents and the air cooling vents above the valves (different types of cloth). This is in very poor condition and I want to replace it. I am OK with standard speaker cloth for the speaker vents, but am a bit worried about whether that would be suitable above the valves because of the temperature. Does anybody have any advice/suggestions?


 
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