Mullard CV4015 info?

Cloth Ears · 2nd May 2006, 12:19 AM

Is there any info on the web for this pentode? I've had a search and cannot find anything.

Much appreciated for a pointer if there is one.

Cloth Ears · 2nd May 2006, 01:01 AM

Have been pointed to http://www.tubecollector.org/cv4015.htm already.

It appears that a certain "well known search engine" pointed me to the 'forsale' page when I searched for them - and I mostly ignore these when searching.

Geek · 2nd May 2006, 06:32 AM

It's like a 6BJ6, only with higher mu.

Generating my tube tester chart for it, it seems remote-cutoff.

Cloth Ears · 2nd May 2006, 07:34 AM

Quote:

Originally posted by Geek
It's like a 6BJ6, only with higher mu.

Generating my tube tester chart for it, it seems remote-cutoff.

Tx Geek,

I'm only asking as a 'local' eBay auction is for 100 of these M8161 types, still in the original packaging. BIN of $Aus145. Not sure whether to go for them or not.

EC8010 · 2nd May 2006, 10:15 AM

Ah, M8161, why didn't you say earlier? I have the Mullard data sheet for M8161. It has very nice flat pentode curves and would make a very good CCS for currents between 10mA and 1mA, Pa(max.) = 3W, Va(max.) = 300V, and it says it's resistant to vibration. It is, however, a variable-mu pentode, so forget any use as an audio amplifier.

Geek · 2nd May 2006, 04:40 PM

Hi,

Quote:

Originally posted by Cloth Ears

...eBay auction is for 100 of these M8161 types, still in the original packaging. BIN of $Aus145. Not sure whether to go for them or not.

A mate in the UK bought 100 of these for 1/2 that

buzzflashlight · 2nd May 2006, 05:49 PM

Hi,
For Valve / Tube data etc. try this link:

http://tdsl.duncanamps.com/tubesearch.php

Always works for me!

Cloth Ears · 2nd May 2006, 11:57 PM

Quote:

Originally posted by Cloth Ears
BIN of $Aus145.

Current auction price is $Aus0.13

Quote:

Originally posted by EC8010
Ah, M8161, why didn't you say earlier? I have the Mullard data sheet for M8161. It has very nice flat pentode curves and would make a very good CCS for currents between 10mA and 1mA, Pa(max.) = 3W, Va(max.) = 300V, and it says it's resistant to vibration. It is, however, a variable-mu pentode, so forget any use as an audio amplifier.

Thank you for the info EC - I'll probably pass...

Quote:

Originally posted by buzzflashlight
http://tdsl.duncanamps.com/tubesearch.php

Thanks for the link, Buzz - I'll Favourites it...

Thanks for all the replies

2nd May 2006, 12:19 AM	#1
Cloth Ears diyAudio Member Join Date: Dec 2001 Location: Melbourne, Australia	Mullard CV4015 info? Is there any info on the web for this pentode? I've had a search and cannot find anything. Much appreciated for a pointer if there is one. __________________ Jont. "It is impossible to build a fool proof system; because fools are so ingenious."

2nd May 2006, 01:01 AM	#2
Cloth Ears diyAudio Member Join Date: Dec 2001 Location: Melbourne, Australia	Have been pointed to http://www.tubecollector.org/cv4015.htm already. It appears that a certain "well known search engine" pointed me to the 'forsale' page when I searched for them - and I mostly ignore these when searching. __________________ Jont. "It is impossible to build a fool proof system; because fools are so ingenious."

2nd May 2006, 10:15 AM	#5
EC8010 diyAudio Moderator Emeritus Join Date: Jan 2003 Location: Near London. UK	Ah, M8161, why didn't you say earlier? I have the Mullard data sheet for M8161. It has very nice flat pentode curves and would make a very good CCS for currents between 10mA and 1mA, Pa(max.) = 3W, Va(max.) = 300V, and it says it's resistant to vibration. It is, however, a variable-mu pentode, so forget any use as an audio amplifier. __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

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2nd May 2006, 06:32 AM	#3
Geek diyAudio Member Join Date: Sep 2004	It's like a 6BJ6, only with higher mu. Generating my tube tester chart for it, it seems remote-cutoff.

2nd May 2006, 05:49 PM	#7
buzzflashlight diyAudio Member Join Date: Aug 2005	Hi, For Valve / Tube data etc. try this link: http://tdsl.duncanamps.com/tubesearch.php Always works for me!

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