Ucl85

Hojvaelde · 25th December 2006, 04:20 PM

Hello

I have a dead ECL85 tube. I have some UCL85 but I can't find a datasheet.

Can I replace the ECL85 with the UCL85, if I change the heating voltage and what is the heating voltage?

Merry x-mas.

Regards

Benny

Tom Bavis · 25th December 2006, 05:13 PM

I can't find any data on UCL85, but it would be about 55V for 5.5W of heater power at 100 mA, same as 6.3/0.875A.

NOT ALL tube numbers match in different heater ratings - for instance UL84 is not like EL84 - it's like EL86.

Eli Duttman · 25th December 2006, 05:28 PM

Benny,

Exactly what the heater voltage is for a UCL85 is an interesting question. Tubes with the "U" at the start of the designation are intended for use in 100 mA. series strings. The ECL85 draws 875 mA./6.3 V. So, a reasonable guess for the 100 mA. UCL85 is 55 V.

25th December 2006, 04:20 PM	#1
Hojvaelde diyAudio Member Join Date: Jan 2005 Location: Denmark	Ucl85 Hello I have a dead ECL85 tube. I have some UCL85 but I can't find a datasheet. Can I replace the ECL85 with the UCL85, if I change the heating voltage and what is the heating voltage? Merry x-mas. Regards Benny

25th December 2006, 05:28 PM	#3
Eli Duttman diyAudio Member Join Date: Apr 2004 Location: Plainsboro, NJ	Benny, Exactly what the heater voltage is for a UCL85 is an interesting question. Tubes with the "U" at the start of the designation are intended for use in 100 mA. series strings. The ECL85 draws 875 mA./6.3 V. So, a reasonable guess for the 100 mA. UCL85 is 55 V. __________________ Eli D.

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25th December 2006, 05:13 PM	#2
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	I can't find any data on UCL85, but it would be about 55V for 5.5W of heater power at 100 mA, same as 6.3/0.875A. NOT ALL tube numbers match in different heater ratings - for instance UL84 is not like EL84 - it's like EL86.

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