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Need help C-J monoblock LP-140M with Siemens CCa

I am new to the tubes world and this is the first time ever I have tubes power amp in my audio gear.

I have been used 3 different sets of NOS/NIB Siemens CCa tubes in my Conrad Johnson LP-140M amplifier, and all have started to fizzle, crackle and/or pop within a few days.

Just curious if others have had this problem? My dilemma is that I like the sound of these CCa tubes, and don't like any junk tubes (Electro-Harmonix was supply with the Amp from C-J factory) in this amp. I don't believed they sound nearly as good as Western European make tubes.

I have hear about Ediswan CV2492 from UpscaleAudio.com, is it really equivalent or better than (Siemens, Telefunken or Valvo) CCa?

Thank you so much for all your feedback and/or suggestions for alternative tubes.
vinhusc
vinhusc OP
11 posts
 
Noh, it's impossible because CJ is very conservative and my dealer told me that they will NOT going to do any modification on my amp.
Well, I'm giving up and looking for the other PowerAmp!
rleff
1,065 posts
 
Vinhuse if you really like those amps I would give bob bracket of rhb designs a call to see if he can modify them to use the tube you reaaly want to roll into those amps;here is his website address,also he gets very positive customer comments on his work.

http://www.rhbsounddezign.com.
Give it a shot might work out well for you
cmalak
681 posts
 
Vinhusc...have you heard the amps with the stock CJ 6922s? If not, I would at the very least do that before deciding to switch your amps and see whether you like them or not.
samhar
1,048 posts
 
I hear your frustration I also dislike the EH sound!!! I also don't care much for the 6H30 so you might be carful as you also may not like this tube!!!
Just curious what speakers are you using?
breuninger
101 posts
 
I saw someone post about the dreaded "hand oil". Sorry to say but this is a load of crapola. I have tubes ranging from WE212E that will remove you finger prints if you touch them hot to a gazillion 6550s in the CJ and jadis JA-500. In no case have I lost a tube due to touching it. Old wives tales from the audio crypt.

Peter
Sr. Writer
The Absolute Sound
http://www.avguide.com/forums/peter-breuningers-reviewer-background
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