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I was just reseaching the pv-10a a few days ago, and it real ... 6550c
I believe the 10a differences are all centered around the ba ... Davide256
I've not listened to earlier models, but i really love my pv ... Sabocat
I had my pv-12l extensively modified by rhb dezigns located ... Hifiman5
I also have heard good things about rhb designs.that being s ... Usblues
Mod might be too strong a word. rejuvenate is probably bette ... Davide256
I'd hazard a guess that a pv-10b would be a better platform ... Unsound
First, e-mail c-j... email@example.com ...and ask fo ... Jeffreybehr
Davide, you can talk to ed at c/j customer service. he is a ... Hifigeek1
Being a DIY'er at heart I've gone ahead and made some changes which have been highly successful.
1> for the line stage section, I have replaced the white CJ design bypass capacitors with like value Multicaps. I choose these because their physics makes sense, prior success with an Adcom DAC and relatively low cost (~$15 per capacitor). This immediately resolved the high frequency rolloff and some of the compression I was hearing.
2> I replaced the power cord in (typical lampwire)with a Furutech IEC socket. When i cut this cord it was heavily oxidized. This stage require care not to damage the transformer, make sure you place a solid obstacle buffer between the transformer and the work area where the metal must be cut to insert the IEC socket. total cost about $15 for socket. Significant improvement in base and dynamics if you use a quality power cord.
3> I replaced the 5 legacy tube sockets (bakelite?) with hybrid teflon, gold plated sockets, each ~$6 or total of $30. easy soldering replacement if you have a desoldering tool. This helped soldify, tame "wooliness" in the base and eliminated edginess in the highs.
Solder used throughout, Cardas.
ecstatic to have my preamp sounding great again.
Still waiting on delivery of the Multicaps for phono stage but I have no doubts they will wipe out the slowmess which still remains in phono transients. Only annoyance here is that 0.15uf 400 VDC wasn't available, per other upgraders advice i've ordered 0.22 uf values.
Total cost to bring a PV10-A back to 1993 newness for line stage around $75 + soldering tools. Will post outcome later this week for phono stage.
Davide256 (System | Threads | Answers | This Thread)
Phono stage is proving a little more tricky. the multicaps i ... Davide256
I have found multicaps to have an upper midrange glare. i re ... Hifigeek1
Hi davide256,breakin time perhaps?cheers,b Usblues
I used black gate caps when they were available to replace t ... Orpheus10
Which multicaps???????????????????????? there are several v ... Jeffreybehr
Looks like its the usual with audio, fix 1 problem only to r ... Davide256
Those white capacitors you are referring to are teflon capac ... Orpheus10
Just getting back to this thread after a while. the small wh ... Davide256
David, if you're talking about the low frequencies of music, ... Jeffreybehr
Very happy so far with the solen replacements in the pre ma ... Davide256
Hi there, you will find the cheapest multicaps are far quic ... Dover
Hi davide, i would recommend the bob backert power supply mo ... Hukkfinn
I've replaced the phono output caps as planned with the sole ... Davide256
After weighing pro's and con's i decided to go with the prol ... Davide256
I hadn't expected immediate improvement using the vcaps, noe ... Davide256
Did any of you replace the caps and resistors yourself.. if ... Kennesawjet
Resistors are all original. output section of pre and phono ... Davide256
Also replaced the stock electrolytics on power supply sectio ... Davide256
Ok so the upgrade bug is hard to stop. i've now upgraded in ... Davide256
When my pv-10 (that i had for 17 years)needed repair (a tube ... Countryjazz2
Just wanted to add that you would get auricaps in your power ... Hukkfinn
Have continued to work on this as the board layout is easy t ... Davide256
Since last post i have actually made 3 changes. (1) in gener ... Davide256
Sorry, busy with other things. so since last time 1) in the ... Davide256
You might wish to try a jj e83cc or better yet an e803s i th ... Hifigeek1
I actually talked to a very helpful gentlemen at a shop in s ... Davide256
Hi davide, i noticed this part of your journey: "also ... Hukkfinn
There's a few small value electrolytics in the power supply ... Davide256