Replacing ECC83 in Leak Stereo50 with ECC808

jamesjung21 · 11th July 2006, 10:56 PM

Hi

Is it safe enough if I replace ECC83 on Leak Stereo50 with ECC808...?

I heard ECC808 has lower maximum anode dissipation...

James

Eli Duttman · 11th July 2006, 11:49 PM

Look at the data sheet. The 340 mA. heater draw of the ECC808 is a matter of concern.

Does the Stereo 50 share a 'X7 between the 2 channels? If not, why get your bowels in an uproar? The Sovtek 12AX7LPS is a FINE tube available at modest cost.

jamesjung21 · 12th July 2006, 04:37 AM

They are being shared.
I will look up the specs for heater windings on transformer used in Stereo50, but other than heater issue, can ECC808 take over the place of ECC83 in Stereo70...? (considering max cathode current and overall plate dissipation rating being half of 12AX7)

Why should I buy Russian tubes while I have a bunch of Telefunken ECC808....?

barretter · 12th July 2006, 06:22 AM

ECC808 is supposed to be lower noise but has a different pin-out : you'll have to rewire the socket.

gingertube · 12th July 2006, 07:27 AM

Look at the new JJ ECC803S for direct replacement.
Ita a premium performance 12AX7/ECC83.

Cheers.
Ian

11th July 2006, 10:56 PM	#1
jamesjung21 diyAudio Member Join Date: Dec 2003 Location: New Zealand	Replacing ECC83 in Leak Stereo50 with ECC808 Hi Is it safe enough if I replace ECC83 on Leak Stereo50 with ECC808...? I heard ECC808 has lower maximum anode dissipation... James

11th July 2006, 11:49 PM	#2
Eli Duttman diyAudio Member Join Date: Apr 2004 Location: Plainsboro, NJ	Look at the data sheet. The 340 mA. heater draw of the ECC808 is a matter of concern. Does the Stereo 50 share a 'X7 between the 2 channels? If not, why get your bowels in an uproar? The Sovtek 12AX7LPS is a FINE tube available at modest cost. __________________ Eli D.

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12th July 2006, 04:37 AM	#3
jamesjung21 diyAudio Member Join Date: Dec 2003 Location: New Zealand	They are being shared. I will look up the specs for heater windings on transformer used in Stereo50, but other than heater issue, can ECC808 take over the place of ECC83 in Stereo70...? (considering max cathode current and overall plate dissipation rating being half of 12AX7) Why should I buy Russian tubes while I have a bunch of Telefunken ECC808....?

12th July 2006, 06:22 AM	#4
barretter diyAudio Member Join Date: Apr 2003 Location: West Yorkshire, UK.	ECC808 is supposed to be lower noise but has a different pin-out : you'll have to rewire the socket.

12th July 2006, 07:27 AM	#5
gingertube diyAudio Member Join Date: Oct 2004 Location: Adelaide South Oz	Look at the new JJ ECC803S for direct replacement. Ita a premium performance 12AX7/ECC83. Cheers. Ian