2. amps-preamps
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Conrad Johnson PV10A-Which Tubes ? When to Change?

Just picked up a great CJ PV 10A. Assuming consistent use, how often should the tubes be changed ? Can anyone recommend a source for new tubes when they are needed ?

I'm paired up with and Adcom 535-II amp, Spica tc 50's, and a Cambridge audio CD4SE . Thanks for any help offered.
fredman
sugarbrie
3,854 posts
 
While is will not be the cheapest route, consider buying a replacement set of tube directly from Conrad Johnson. They will be well tested to be sure they meet or exceed CJ's standards. The preamp will also perform like a factory new one, since it will have the same tubes..
cellorover
417 posts
 
There is also an upgrade for the 10A to the 10B. You may want to consider sending the preamp to CJ for an upgrade and retube all in one.
russschaeffer
34 posts
 
Fredman,

I have a PV10BL. I liked the standard 6189's that come from the factory but I tried some CV4003's? Mullards. Not all tubes will work, the C-J needs a very quiet tube or it's snap, crackle, pop! The JAN (Joint Army-Navy) Phillips 6189 are VERY nice sounding tube and very robust. Tube life should be 2000-5000 hrs if I remember correctly.

Thanx
Russ
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