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: Davide256
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)
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
I used black gate caps when they were available to replace t ... Orpheus10
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
05-31-13
Hi davide, i noticed this part of your journey: "also ... Hukkfinn
05-31-13
There's a few small value electrolytics in the power supply ... Davide256
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