75% of rated max. current too high?

bequerel · 12th June 2005, 11:47 AM

I am working on a tube preamp. I really love the AZ1 rectifier tube. This has a rated max. current of 100 mA.
Would you consider a constant load of 75 mA to be too high (i.e. excessive tube wear)?

Alain Dupont · 12th June 2005, 02:01 PM

bequerel,

Looking at the docs... Philips AZ1 - 1953

http://www.mif.pg.gda.pl/cgi-bin/vs4.pl

2*300volts 100mA
2*400Volts 75 mA
2*500Volts 60mA

In the case of <=300Volts 75mA is correct.

Regards.

bequerel · 12th June 2005, 02:09 PM

Thanks a lot, Alain! I was not aware of that the max. current was dependent on the voltage. (The link does not work, by the way.)

Alain Dupont · 13th June 2005, 12:07 PM

bequerel,

The right link is:

http://www.mif.pg.gda.pl/homepages/frank/vs.html

search for AZ1

Regards.

Alain.

bequerel · 13th June 2005, 12:22 PM

Thanks, that works.

12th June 2005, 11:47 AM	#1
bequerel diyAudio Member Join Date: Sep 2003	75% of rated max. current too high? I am working on a tube preamp. I really love the AZ1 rectifier tube. This has a rated max. current of 100 mA. Would you consider a constant load of 75 mA to be too high (i.e. excessive tube wear)? __________________ Thanx!

12th June 2005, 02:09 PM	#3
bequerel diyAudio Member Join Date: Sep 2003	Thanks a lot, Alain! I was not aware of that the max. current was dependent on the voltage. (The link does not work, by the way.) __________________ Thanx!

13th June 2005, 12:22 PM	#5
bequerel diyAudio Member Join Date: Sep 2003	Thanks, that works. __________________ Thanx!

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12th June 2005, 02:01 PM	#2
Alain Dupont diyAudio Member Join Date: Sep 2003 Location: Paris - France	bequerel, Looking at the docs... Philips AZ1 - 1953 http://www.mif.pg.gda.pl/cgi-bin/vs4.pl 2300volts 100mA 2400Volts 75 mA 2*500Volts 60mA In the case of <=300Volts 75mA is correct. Regards.

13th June 2005, 12:07 PM	#4
Alain Dupont diyAudio Member Join Date: Sep 2003 Location: Paris - France	bequerel, The right link is: http://www.mif.pg.gda.pl/homepages/frank/vs.html search for AZ1 Regards. Alain.

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