EML 5u4G-mesh and minimum required copper resistance

About the Emission Labs tubes and how to use them.

EML 5u4G-mesh and minimum required copper resistance

Postby nnerto » Tue Oct 17, 2017 10:01 pm

Hi
I am interested to use a EML 5U4G mesh in my amplifier, but I have a question about the minimum required copper resistance of the transformer winding. I see in the EML web page that the minimum Raa value for the curve 1 to 6 is 170 ohm. This value is different form the data sheet of the other manufacturer. Please if you see for example the Sylvania 5u4G or GE you can find a much less value. So, because in my amplifier I have a Raa of around 80 ohm ( and first capacitor of the filer of 22 uF, and 180 mA dc current to the load) , I ask if I can use the EML 5U4g without risk of damage it. Thank you very much
nnerto
 
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Joined: Tue Oct 17, 2017 9:33 pm

Re: EML 5u4G-mesh and minimum required copper resistance

Postby J. Leven » Sat Nov 11, 2017 10:38 am

Hi,
die 170 Ohm sind Raa, bei sylvania each plate ,
wenn Raa zu klein ist müssen entprechende 2 zusätzliche Wiederstände eingebaut werden,
die Ausgangsspannung wird dadurch aber etwas verringert ,
zu 5U4G mesh kann ich nichts sagen , habe bisher nur EH 5U4GC und 5U4G Svetlana verbaut

J.L.
J. Leven
 
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