Comparison of Sovtek 5751 and RCA 5751

eeyore · 21st March 2011, 01:10 PM

Hi guys, I just posted a short review on the the Sovtek 5751 and the RCA Command Series 5751 as used in my Maple Tree Audio Ear+ headphone amp as the driver tube.

Comments and thoughts appreciated!

SemperFi · 21st March 2011, 09:57 PM

Dude, that was not short! How many words was that? I need photos and diagrams. Dont much understand that many words in a row. Good review tho, nice to see someone taking a serious approach for once and doesnt just enjoy the music without demanding some minimal performance. Have u tried listening to a tube dipped in vinegar? Really gets the tone out. Perhaps thats what the cheap Sovtek needs.

eeyore · 21st March 2011, 10:01 PM

The Ear design schematic is easily available on-line. It is direct couple grounded cathode driver stage followed by a cathode follower output that is transformer coupled to the headphone.

You serious about vinegar? Not sure how that can affect performance of a tube?

Palustris · 21st March 2011, 11:58 PM

Almost $100 for a 5751? That is really astonishing! Where have I been? I have a dozen RCA 5751 NIB tubes I found in a junk shop in Encinitas, CA years ago for $1 each. I was going to use them in a conrad johnson preamp but never needed them.

Eli Duttman · 22nd March 2011, 12:15 AM

Quote:

Almost $100 for a 5751? That is really astonishing!

Not really. A NOS TFK ECC803S sells for hundreds of $. Across the board, type after type, quality NOS is fast disappearing.

eeyore · 22nd March 2011, 01:42 AM

I think you can get some non "Command Series", but still RCA Blackplates for $60 or so from another tube dealer. Not sure if they are different. I might try some 12AT7 in this as well to compare.

artosalo · 22nd March 2011, 05:23 PM

It is quite difficult to discuss about anyones personal listening results, since these are fully subjective. Somebody else can have opposite feelings and you both are equally right.

Instead, it would be easy to discuss about test data, which is objective.

21st March 2011, 01:10 PM	#1
eeyore diyAudio Member Join Date: Aug 2005	Comparison of Sovtek 5751 and RCA 5751 Hi guys, I just posted a short review on the the Sovtek 5751 and the RCA Command Series 5751 as used in my Maple Tree Audio Ear+ headphone amp as the driver tube. Comments and thoughts appreciated! __________________ DF http://diy-audio-blog.blogspot.com

21st March 2011, 10:01 PM	#3
eeyore diyAudio Member Join Date: Aug 2005	The Ear design schematic is easily available on-line. It is direct couple grounded cathode driver stage followed by a cathode follower output that is transformer coupled to the headphone. You serious about vinegar? Not sure how that can affect performance of a tube? __________________ DF http://diy-audio-blog.blogspot.com

22nd March 2011, 01:42 AM	#6
eeyore diyAudio Member Join Date: Aug 2005	I think you can get some non "Command Series", but still RCA Blackplates for $60 or so from another tube dealer. Not sure if they are different. I might try some 12AT7 in this as well to compare. __________________ DF http://diy-audio-blog.blogspot.com

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21st March 2011, 09:57 PM	#2
SemperFi diyAudio Member Join Date: Jan 2002 Location: nowhere	Dude, that was not short! How many words was that? I need photos and diagrams. Dont much understand that many words in a row. Good review tho, nice to see someone taking a serious approach for once and doesnt just enjoy the music without demanding some minimal performance. Have u tried listening to a tube dipped in vinegar? Really gets the tone out. Perhaps thats what the cheap Sovtek needs.

21st March 2011, 11:58 PM	#4
Palustris diyAudio Member Join Date: Aug 2006 Location: Cape Cod	Almost $100 for a 5751? That is really astonishing! Where have I been? I have a dozen RCA 5751 NIB tubes I found in a junk shop in Encinitas, CA years ago for $1 each. I was going to use them in a conrad johnson preamp but never needed them.

22nd March 2011, 05:23 PM	#7
artosalo diyAudio Member Join Date: Feb 2010	It is quite difficult to discuss about anyones personal listening results, since these are fully subjective. Somebody else can have opposite feelings and you both are equally right. Instead, it would be easy to discuss about test data, which is objective.

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