Erla Model S-11 Service information

4/19/2004 4:56:07 PMCarl Crabtree

Still looking for service data for the ERLA Model S-11.Checked out CW Tavis' Suggestion about Sentinel S-11 but the ERLA is quite different. The tube line up is five Cunningham CX301As. There are three unusal Doughnut shaped coils-each tuned by separate variable capacitors. I have determined that the interstage audio transformers are not usable. Maybe someone knows what transformers would work as substitutes. Any information on this radio would be helpful and appreciated. thanks

4/19/2004 7:38:09 PMNorm Leal

Hi Carl

You can use transformer similar to A-53C, Ratio 1:3, for audio interstage. They can be purchased from AES, www.tubesandmore.com and PTOP, www.oldradioparts.com .

Not all 1920's battery radios have schematics available. Use Stewart Warner 300 series schematics if you don't find Erla S11. Available Erla schematics can be found here:

http://www.nostalgiaair.org/Resources/126/T0000126.htm

Norm

:Still looking for service data for the ERLA Model S-11.Checked out CW Tavis' Suggestion about Sentinel S-11 but the ERLA is quite different. The tube line up is five Cunningham CX301As. There are three unusal Doughnut shaped coils-each tuned by separate variable capacitors. I have determined that the interstage audio transformers are not usable. Maybe someone knows what transformers would work as substitutes. Any information on this radio would be helpful and appreciated. thanks

4/19/2004 11:56:26 PMCarl Creabtree

:Hi Carl
:
: You can use transformer similar to A-53C, Ratio 1:3, for audio interstage. They can be purchased from AES, www.tubesandmore.com and PTOP, www.oldradioparts.com .
:
: Not all 1920's battery radios have schematics available. Use Stewart Warner 300 series schematics if you don't find Erla S11. Available Erla schematics can be found here:
:
:http://www.nostalgiaair.org/Resources/126/T0000126.htm
:
:Norm
:
:
:
::Still looking for service data for the ERLA Model S-11.Checked out CW Tavis' Suggestion about Sentinel S-11 but the ERLA is quite different. The tube line up is five Cunningham CX301As. There are three unusal Doughnut shaped coils-each tuned by separate variable capacitors. I have determined that the interstage audio transformers are not usable. Maybe someone knows what transformers would work as substitutes. Any information on this radio would be helpful and appreciated. thanks

4/21/2004 5:02:40 PMCarl Crabtree

::Hi Carl
::
:: You can use transformer similar to A-53C, Ratio 1:3, for audio interstage. They can be purchased from AES, www.tubesandmore.com and PTOP, www.oldradioparts.com .
::
:: Not all 1920's battery radios have schematics available. Use Stewart Warner 300 series schematics if you don't find Erla S11. Available Erla schematics can be found here:
::
::http://www.nostalgiaair.org/Resources/126/T0000126.htm
::
::Norm
::
::
::
:::Still looking for service data for the ERLA Model S-11.Checked out CW Tavis' Suggestion about Sentinel S-11 but the ERLA is quite different. The tube line up is five Cunningham CX301As. There are three unusal Doughnut shaped coils-each tuned by separate variable capacitors. I have determined that the interstage audio transformers are not usable. Maybe someone knows what transformers would work as substitutes. Any information on this radio would be helpful and appreciated. thanks

1/22/2006 12:34:00 AMWilbur E. Haggerty

Hi, Carl.

Can't help you with what you are looking for. Just wanted to let you know that I have the first radio that was in the town of La Fontaine, IN. It is an Erla Model S 11, Serial number 18939. It has a Cunningham Cx301A in the 1st and 5th sockets and a Crusader SLX201A in sockets 2,3, &4. I had it completely restored. It looks just like a new 1925 Erla. Also had it converted to a battery eliminator.
Worked really well at the restorer's place. I haven't used it at my place because I don't have an outdoor antenna for it. It really should be in a museum. It just sits there not being used. Do you have any information on these early Erlas? Just thought you might be interested in my radio. It belonged to my grandfather. I am nearly 69.