CV2492 / 6922 / E88CC

cs · 3rd March 2006, 09:10 AM

A colleague of mine has some NOS CV2492 double triodes, which we intend to use in a hybrid amp project. (I believe this is a near equivalent to the 6922 and E88CC).

How does the sound quality of this tube compare with the likes of the ECC83, or 6SL7 ?

Cheers,
Chris.

SY · 3rd March 2006, 11:51 AM

Chalk and cheese. The E88CC is a VERY different sort of tube used in very different circuits. Both E88CC and 6SL7 appear in the signal chain in my system, but in different places doing different things.

In any case, you've got a damn nice couple of tubes there. Pity to waste them in a hybrid amp.

commsysman · 24th March 2006, 04:26 PM

Any of those tubes are good for audio. The main issue is low noise, which varies from tube to tube and type to type; research the noise figures, or test them in a test circuit with a cap from grid to ground and no signal, and you will have your answer. Put a scope on the plate with grid at zero signal to check noise.
The 6922 is very good, but in my Audio Research LS2b preamp I found that after about 1000 hours, even the best tubes would get noisy and the sound would get grungy; time for new tubes.

The newest ones from AR use the 6H30 which is supposedly the absolute best one available, and lasts well, supposedly. Do not neglect to use the best low-noise film resistors in the signal path; they are a major issue also.

3rd March 2006, 09:10 AM	#1
cs diyAudio Member Join Date: Jun 2005 Location: .	Cv2492 / 6922 / E88cc A colleague of mine has some NOS CV2492 double triodes, which we intend to use in a hybrid amp project. (I believe this is a near equivalent to the 6922 and E88CC). How does the sound quality of this tube compare with the likes of the ECC83, or 6SL7 ? Cheers, Chris.

3rd March 2006, 11:51 AM	#2
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Chalk and cheese. The E88CC is a VERY different sort of tube used in very different circuits. Both E88CC and 6SL7 appear in the signal chain in my system, but in different places doing different things. In any case, you've got a damn nice couple of tubes there. Pity to waste them in a hybrid amp. __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

24th March 2006, 04:26 PM	#3
commsysman diyAudio Member Join Date: Mar 2006 Location: california	tubes Any of those tubes are good for audio. The main issue is low noise, which varies from tube to tube and type to type; research the noise figures, or test them in a test circuit with a cap from grid to ground and no signal, and you will have your answer. Put a scope on the plate with grid at zero signal to check noise. The 6922 is very good, but in my Audio Research LS2b preamp I found that after about 1000 hours, even the best tubes would get noisy and the sound would get grungy; time for new tubes. The newest ones from AR use the 6H30 which is supposedly the absolute best one available, and lasts well, supposedly. Do not neglect to use the best low-noise film resistors in the signal path; they are a major issue also.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
my 6922 / E88CC preamp	alexw88	Tubes / Valves	28	18th February 2012 04:57 PM
WTB: E88CC 6922 Tubes	jjaudio	Swap Meet	4	20th May 2011 12:29 PM
TESLA E88CC 6922 Tubes shorting out???????	Serratoga	Tubes / Valves	10	26th March 2008 03:54 PM
Transconductance of E88CC,6922,6N23P	leadbelly	Tubes / Valves	2	3rd December 2007 08:51 PM
Need some info on E88CC/6922	ebijma	Tubes / Valves	5	22nd March 2004 09:15 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read