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Conrad Johnson PV-10A mod experiences?

Has anyone had experience performing a mod on the CJ PV-10A? I'm fond of this preamp, it has that wonderful tube openness and sweetness for harmonics. However over the past 6 months as I've delved into PC audio and DAC improvements, I've come to realize two things about it 1) its slow on transients 2) its dynamically compressed. I'm using Mullard NOS tubes throughout as these seem wonderfully detailed with excellent base. Since the preamp is built like an engineering prototype (overbuilt)my gut hunch is that some caps have aged (circa 1993)and need replacement, specifically the white CJ caps and am thinking about replacing them first with Multicaps. Wondering if anyone has experience trying to revitalize a PV 10A? Davide256  (System | Threads | Answers | This Thread) 02-06-11

Responses (1-36 of 36)

Click title to read one, or click date to read all below it. 02-07-11   I was just reseaching the pv-10a a few days ago, and it real ...   6550c 02-07-11   I believe the 10a differences are all centered around the ba ...   Davide256 02-07-11   I've not listened to earlier models, but i really love my pv ...   Sabocat 02-07-11   I had my pv-12l extensively modified by rhb dezigns located ...   Hifiman5 02-07-11   I also have heard good things about rhb designs.that being s ...   Usblues 02-08-11   Mod might be too strong a word. rejuvenate is probably bette ...   Davide256 02-08-11   I'd hazard a guess that a pv-10b would be a better platform ...   Unsound 02-09-11   First, e-mail c-j... service@conradjohnson.com ...and ask fo ...   Jeffreybehr 02-09-11   Davide, you can talk to ed at c/j customer service. he is a ...   Hifigeek1 03-06-11   Being a diy'er at heart i've gone ahead and made some change ...   Davide256 03-13-11   Phono stage is proving a little more tricky. the multicaps i ...   Davide256 03-14-11   I have found multicaps to have an upper midrange glare. i re ...   Hifigeek1 03-14-11   Hi davide256,breakin time perhaps?cheers,b   Usblues 03-15-11: Orpheus10 I used Black Gate caps when they were available to replace the lytics. Someone told me Jentsen work well. The tubes you're using are good. I'm sure the sound will tighten up if you replace the electrolytics. I use RCA NOS 12 au7 cleartop, mullards are probably better. Orpheus10  (Threads | Answers | This Thread) 03-15-11   Which multicaps???????????????????????? there are several v ...   Jeffreybehr 03-15-11   Looks like its the usual with audio, fix 1 problem only to r ...   Davide256 03-16-11   Those white capacitors you are referring to are teflon capac ...   Orpheus10 10-26-11   Just getting back to this thread after a while. the small wh ...   Davide256 10-26-11   David, if you're talking about the low frequencies of music, ...   Jeffreybehr 11-08-11   Very happy so far with the solen replacements in the pre ma ...   Davide256 11-09-11   Hi there, you will find the cheapest multicaps are far quic ...   Dover 12-07-11   Hi davide, i would recommend the bob backert power supply mo ...   Hukkfinn 12-07-11   I've replaced the phono output caps as planned with the sole ...   Davide256 03-07-12   After weighing pro's and con's i decided to go with the prol ...   Davide256 03-15-12   I hadn't expected immediate improvement using the vcaps, noe ...   Davide256 03-29-12   Did any of you replace the caps and resistors yourself.. if ...   Kennesawjet 04-08-12   Resistors are all original. output section of pre and phono ...   Davide256 04-08-12   Also replaced the stock electrolytics on power supply sectio ...   Davide256 04-30-12   Ok so the upgrade bug is hard to stop. i've now upgraded in ...   Davide256 05-02-12   When my pv-10 (that i had for 17 years)needed repair (a tube ...   Countryjazz2 06-03-12   Just wanted to add that you would get auricaps in your power ...   Hukkfinn 09-22-12   Have continued to work on this as the board layout is easy t ...   Davide256 10-07-12   Since last post i have actually made 3 changes. (1) in gener ...   Davide256 02-02-13   Sorry, busy with other things. so since last time 1) in the ...   Davide256 02-03-13   You might wish to try a jj e83cc or better yet an e803s i th ...   Hifigeek1 03-01-13   I actually talked to a very helpful gentlemen at a shop in s ...   Davide256

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