CJ PV-5 Tubes
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CJ PV-5 Tubes
I have a PV-5 that didn't sound so great when I bought it so I really haven't used it. Recently I have a bit more time, well not much but just enough, and I opened it up and saw that it has a mismash of tubes; I have no way of knowing whether they were carefully selected or are just whatever someone had lying around when I bought it. More likely the latter. So I'm going to shop for a new set of tubes for it and am inviting recommendations. I don't know what the correct stock set was. Secondly, should I be concerned about replacing power supply caps? I believe that this amp has not been updated or modified since new. I'm not looking to transform it into anything more than a properly functioning PV-5. I'll be using it with a Dynaco ST-70 in excellent shape with some updates.
Last edited by mmmalmberg on Sun Oct 28, 2012 10:12 pm, edited 1 time in total.
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Re: CJ PV-5 Tubes
That is certainly a strange mix of tubes. There are numerous good tube sets and since I don't own the PV-5 I don't want to make a recommendation and lead you down the wrong road. You probably would want to go with the same manufacturer however.
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Home Theater in Member Gallery
Main stereo: ART Amplifier and ET7s2. 2nd stereo: PV-14L and MV-55. Previously Owned: PF2 preamp, Evolution 2000 Amp, PV-12AL preamp, D/A-2b Vacuum-Tube Digital Processor.
Home Theater in Member Gallery
Main stereo: ART Amplifier and ET7s2. 2nd stereo: PV-14L and MV-55. Previously Owned: PF2 preamp, Evolution 2000 Amp, PV-12AL preamp, D/A-2b Vacuum-Tube Digital Processor.
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Re: CJ PV-5 Tubes
Yeah I don't have a lot of experience with tubes really but I imagine it would be hard to get a good match with tubes of different manufacture. I have an email in to C.J. to see what they offer in a complete set. Actually I'm glad to hear tentative confirmation that this might not be a correct set of tubes, gives me hope that a good set of tubes might make a positive difference in sound quality (which is needed:)admin wrote:That is certainly a strange mix of tubes. There are numerous good tube sets and since I don't own the PV-5 I don't want to make a recommendation and lead you down the wrong road. You probably would want to go with the same manufacturer however.
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Re: CJ PV-5 Tubes
The tube selection, while a mix of brands is OK, in terms of the tube types. In the cathode follower position where the AT7's are located, you can run an AX 7 or an AU7 also. I prefer the 12AU7: not as dynamic as the AT7 but more controlled.
It all depends on your taste here.
Stu
It all depends on your taste here.
Stu
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Re: CJ PV-5 Tubes
Thanks Stu. I now have a good set of the as-specified tubes and am going to replace p.s. caps after which it will be good to know that I can compare the more-or-less stock tube set with some of these other tubes.
Re: CJ PV-5 Tubes
I just bought an used CJ PV 2. How did you find out what tubes you should have in the pre?
Re: CJ PV-5 Tubes
I'm not sure if you are referring to general tube recommendations or the specific tube types you can use.rromeo923 wrote:I just bought an used CJ PV 2. How did you find out what tubes you should have in the pre?
Different manufacturer's tubes will sound different and as I don't own the PV 2 I can't offer an opinion. Here is the specific tube types however for the PV2:
- Attachments
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- Conrad Johnson PV 2 tube diagram
- tsd-PV2.jpg (22.65 KiB) Viewed 2905 times
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Home Theater in Member Gallery
Main stereo: ART Amplifier and ET7s2. 2nd stereo: PV-14L and MV-55. Previously Owned: PF2 preamp, Evolution 2000 Amp, PV-12AL preamp, D/A-2b Vacuum-Tube Digital Processor.
Home Theater in Member Gallery
Main stereo: ART Amplifier and ET7s2. 2nd stereo: PV-14L and MV-55. Previously Owned: PF2 preamp, Evolution 2000 Amp, PV-12AL preamp, D/A-2b Vacuum-Tube Digital Processor.