Please recommend a 9-pin dual triode = 417A

arnoldc · 6th March 2007, 08:21 AM

Is there such a thing? A dual 9-pin triode with the same characteristic of the 417A?

Tube gurus, I will appreciate your recommendation.

TIA

ray_moth · 6th March 2007, 09:09 AM

I don't know of an exact match but the specs of the 417A are unusual, to say the least.

The closest I can find are 7044, 8223 and E288CC. None of these has such a high amplification factor or transconductance as the 417A but they are within the ball-park for plate resistance, plate max. dissipation and plate max. current rating. All are 9-pin double triodes.

arnoldc · 6th March 2007, 10:03 PM

hi ray, thanks so much for taking the time. much appreciated.

6th March 2007, 08:21 AM	#1
arnoldc diyAudio Member Join Date: Apr 2003 Location: Makati	Please recommend a 9-pin dual triode = 417A Is there such a thing? A dual 9-pin triode with the same characteristic of the 417A? Tube gurus, I will appreciate your recommendation. TIA

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6th March 2007, 09:09 AM	#2
ray_moth diyAudio Moderator Emeritus Join Date: Jan 2004 Location: Jakarta	I don't know of an exact match but the specs of the 417A are unusual, to say the least. The closest I can find are 7044, 8223 and E288CC. None of these has such a high amplification factor or transconductance as the 417A but they are within the ball-park for plate resistance, plate max. dissipation and plate max. current rating. All are 9-pin double triodes.

6th March 2007, 10:03 PM	#3
arnoldc diyAudio Member Join Date: Apr 2003 Location: Makati	hi ray, thanks so much for taking the time. much appreciated.

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