A2293 pins connection, help !!!

aldovan · 24th June 2010, 07:15 PM

Friends

Anyone have the pins connection informations for tube A2293 ?

Thanks,

Aldovan

rotaspec · 24th June 2010, 09:56 PM

A2293 equivalent CV4079 some data here:

http://www.jeack.com.au/~lucas/CV4079.jpg

aldovan · 24th June 2010, 10:38 PM

Quote:

Originally Posted by rotaspec

A2293 equivalent CV4079 some data here:

http://www.jeack.com.au/~lucas/CV4079.jpg

Thanks !!!
I receive two datasheet, but with no pins connection, before...
Your informations have the pins.

Aldovan

316a · 25th June 2010, 10:21 AM

I have used the A2293 on a few occasions . The Avo valve data book available online at Frank's site has the pinout : pin 2 cathode , pin 4,5 heater , pin 6 grid , pin 9 anode . The anode looks too small for 15 watts dissipation , keep the grid leak 220k or less .

cheers

316A

barretter · 25th June 2010, 11:33 AM

I have the GEC spec sheet for the A2293 and it does give 15W as the absolute maximum anode dissipation, Maximum anode voltage is 600V, heater to cathode voltage max, is 250V , maximum cathode current is 120mA, maximum usable resistor from grid to cathode is 100K for fixed bias and 270K for cathode bias. The sheet gives characteristics of 12 mA/V transconductance, mu of 4.5 and output impedance of 375 ohms with Va at 150V, Ia at 100mA and -Vg of 23V. I use mine as the series pass valve in a regulated supply for my phono preamp. More economical to use than a 6080 if you don't need oodles of milliamps.

24th June 2010, 07:15 PM	#1
aldovan diyAudio Member Join Date: Jul 2005 Location: Campo Grande city	A2293 pins connection, help !!! Friends Anyone have the pins connection informations for tube A2293 ? Thanks, Aldovan

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24th June 2010, 09:56 PM	#2
rotaspec diyAudio Member Join Date: Nov 2007	A2293 equivalent CV4079 some data here: http://www.jeack.com.au/~lucas/CV4079.jpg

25th June 2010, 10:21 AM	#4
316a diyAudio Member Join Date: Dec 2002 Location: West London	I have used the A2293 on a few occasions . The Avo valve data book available online at Frank's site has the pinout : pin 2 cathode , pin 4,5 heater , pin 6 grid , pin 9 anode . The anode looks too small for 15 watts dissipation , keep the grid leak 220k or less . cheers 316A

25th June 2010, 11:33 AM	#5
barretter diyAudio Member Join Date: Apr 2003 Location: West Yorkshire, UK.	I have the GEC spec sheet for the A2293 and it does give 15W as the absolute maximum anode dissipation, Maximum anode voltage is 600V, heater to cathode voltage max, is 250V , maximum cathode current is 120mA, maximum usable resistor from grid to cathode is 100K for fixed bias and 270K for cathode bias. The sheet gives characteristics of 12 mA/V transconductance, mu of 4.5 and output impedance of 375 ohms with Va at 150V, Ia at 100mA and -Vg of 23V. I use mine as the series pass valve in a regulated supply for my phono preamp. More economical to use than a 6080 if you don't need oodles of milliamps.

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