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Post by garp on Mar 29, 2005 9:54:58 GMT 7
Mine DIY lang pero I'm looking to buy one. Just want to know what's available here.
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s2kov
Critical Listener
Posts: 353
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Post by s2kov on Mar 29, 2005 10:56:52 GMT 7
diy using 12ax7. eyeing for diy ss phono stage.  |
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Post by billfort on Mar 29, 2005 23:17:39 GMT 7
ASL mini-phono which uses 12AX7's. I wanted to diy one but the ASL seemed a pretty nice design with a separate PS, sounds very nice and is cheap up here - a lot less than I could have built one for. I'm very happy with it performance wise but build quality is pretty bad - I shouldn't have looked inside . |
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Post by stereophile on Mar 30, 2005 23:58:09 GMT 7
1. MF X-LP w/ MF-PSU
2. Lehmann BlackCube SE
3. John Poscablo's Tube phono (MM uses 12AX7s, MC uses single 6922, Tube rectified using 5AR4)
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Post by audioboy on Mar 31, 2005 7:08:41 GMT 7
Audible Illusions Modulus II with ecc88 amperex
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Post by hans adriane on Apr 15, 2005 20:23:10 GMT 7
AMX phono preamp 12ax7 tubes |
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s2kov
Critical Listener
Posts: 353
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Post by s2kov on Apr 20, 2005 15:53:16 GMT 7
OPAMP based! |
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Post by hans adriane on Apr 20, 2005 20:44:14 GMT 7
OPAMP based! UY up ang running na pala yan senor s2kov. ;D ;D  |
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Post by garp on Apr 21, 2005 9:48:16 GMT 7
ok got two. diy ad8066 VSPS and MF XLPS
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ran
Audiophyte
Posts: 39
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Post by ran on Apr 21, 2005 16:45:07 GMT 7
Garp,
How does the RJM VSPS fare with the MF XLPS?
I'm planning to build it with premium parts but the price will cost as much as an XLPS!
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s2kov
Critical Listener
Posts: 353
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Post by s2kov on Apr 21, 2005 18:30:15 GMT 7
Hi Ran, You mean the price of pre-owned MF XLPS? VSPS only has 27 parts excluding the OPAMP and PSU. Also, you may just use the premium parts on RIAA stage. Cheers! |
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ran
Audiophyte
Posts: 39
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Post by ran on Apr 21, 2005 19:09:16 GMT 7
I was planning to build a VSPS on steroids kaya when I had the parts quoted at Farnell presyong brand new XLPS na sya.  |
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s2kov
Critical Listener
Posts: 353
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Post by s2kov on Apr 21, 2005 20:27:03 GMT 7
I suggest you build it as simple and have a premium parts on RIAA stage and coupling caps. Try to use OPA2134 as others (from DiyAudio) claim that this is a good sounding and very low noise opamp. You can still get free samples from TI. Also, consider using low impedance caps for the psu. Just a suggestion! |
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Post by garp on Apr 21, 2005 23:22:00 GMT 7
Garp, How does the RJM VSPS fare with the MF XLPS? I'm planning to build it with premium parts but the price will cost as much as an XLPS! I havent done any a-b comparison but I will soon. The VSPS sounds surprisingly very good and that's using only ordinary carbon resistors and polyester caps for the RIAA. I think its a worthy project and its not going to cost you that much. As s2kov suggested use ordinary parts but make the riaa caps polystyrene and the output cap polypropylene. And put the decoupling caps right next to the opamps and bypass with .1uf. The change from 2134 to ad8066 is very noticeable. If you want a quick and easy justification to build it out to full potential, use two 9v batteries for the prototype. You can do this for less than P1000 or even much less if you have the opamps already. |
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ran
Audiophyte
Posts: 39
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Post by ran on Apr 22, 2005 8:16:40 GMT 7
I've already tried ordering samples (OPA627) from TI pero nadeny. Regarding using 9v battery as supply. Di ba masama kung hindi magpareho yung voltage nung dalawa? Let's say naunang nadrain yung isa. Like 8.8v and 8.1v. |
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s2kov
Critical Listener
Posts: 353
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Post by s2kov on May 12, 2005 10:34:16 GMT 7
Hi Garp, Have you tried both OPA627 & OPA637 compare with AD8066? Someone claim from diyaudio that both opamp has SUPERB sounds on cdp and phonostage respectively. I havent done any a-b comparison but I will soon. The VSPS sounds surprisingly very good and that's using only ordinary carbon resistors and polyester caps for the RIAA. I think its a worthy project and its not going to cost you that much. As s2kov suggested use ordinary parts but make the riaa caps polystyrene and the output cap polypropylene. And put the decoupling caps right next to the opamps and bypass with .1uf. The change from 2134 to ad8066 is very noticeable. If you want a quick and easy justification to build it out to full potential, use two 9v batteries for the prototype. You can do this for less than P1000 or even much less if you have the opamps already. |
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Post by garp on May 12, 2005 10:49:56 GMT 7
Not really a comparison but I'm willing to believe this. I used OPA627 at one time for the output stage in my DIY DAC and in many areas I preffered it over the tube stage I did. OPA627 seems a perennial favorite even LC Audio who sells AD8066 modules conceded that OPA627 sounded better but a lot lot more expensive. I haven't able to use this on my DAC or CD Player because I don't have the browndogs. OPA637 is Thorsten's choice for his El Cheapo phono p0reamp and a host of other phono DIY makers.
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s2kov
Critical Listener
Posts: 353
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Post by s2kov on May 12, 2005 11:07:07 GMT 7
It is now the preferred opamps by other audiophiles. Hhhmmm.  OPA627 for cdp and OPA637 for phonostage! Not really a comparison but I'm willing to believe this. I used OPA627 at one time for the output stage in my DIY DAC and in many areas I preffered it over the tube stage I did. OPA627 seems a perennial favorite even LC Audio who sells AD8066 modules conceded that OPA627 sounded better but a lot lot more expensive. I haven't able to use this on my DAC or CD Player because I don't have the browndogs. OPA637 is Thorsten's choice for his El Cheapo phono p0reamp and a host of other phono DIY makers. |
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s2kov
Critical Listener
Posts: 353
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Post by s2kov on May 12, 2005 11:17:00 GMT 7
Since we're on this thread (phonostage), someone might be interested to build Thorsten's El Cheapo Phonostage using OPA637. You can get free sample of this opamp (which i did) from TI.  |
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Post by hans adriane on May 18, 2005 20:04:04 GMT 7
Ito phono stage ng mga masta... wish wish ko lang meron ako..  ;D ;D ;D ;D ;D ;D ;D |
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OPA627 for cdp and OPA637 for phonostage!