Conrad Johnson PV10A-Which Tubes ? When to Change?

I also have a cj pv 10.Two years after the purchace i replaced the tubes because of a microphonic tube. Well since then (cj replacements)they have worked perfectly for nearly 7yrs with med use so if its not broke don,t fix it.You have a very good pre amp enjoy!.

I believe CJ makes a comment on their web site concerning tube life on pre-amps. So you may want to do some purusing there. But basically I think they comment that pre-amp tubes should last 2 to 3 years under normal use.

As far as purchasing tubes. I have had good luck with the Tube Store and Triode Electronics; both have a web site you can order from. I have also purchased tubes from Conrad Johnson and as Sugarbrie suggests they are not the cheapest but if all you want is stock tubes they are a very good safe and reliables source.

Thanks, Chuck

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

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.

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..