Hi Simon,
for feedback, the one I had in hands ( an Alpha Plus ) has seen a new TL1086 fitted at SAA7220 and recaped/osconed board, OPA604 at I/V andLME49710 at buffer. 2x 3.3µF 750V Wima MKP4 at output.
When I've asked the owner if it was "better" he said, "no, it's far more greater" 😉
Seems these opamps work nicely, anyway you'll go for the D1 🙂
Pics of your work please !
Matthieu
for feedback, the one I had in hands ( an Alpha Plus ) has seen a new TL1086 fitted at SAA7220 and recaped/osconed board, OPA604 at I/V andLME49710 at buffer. 2x 3.3µF 750V Wima MKP4 at output.
When I've asked the owner if it was "better" he said, "no, it's far more greater" 😉
Seems these opamps work nicely, anyway you'll go for the D1 🙂
Pics of your work please !
Matthieu
Hi Matthieu,
I'll post pics when I get on with the mods again. Naturally, the Pass D1 stage will be swapped over 🙂
One nice thing about the Arcam is the filter caps around the 1541 are through-hole polyesters. In the Philips CD650 they're tiny SMD and might be ceramic! 😱
Simon
I'll post pics when I get on with the mods again. Naturally, the Pass D1 stage will be swapped over 🙂
One nice thing about the Arcam is the filter caps around the 1541 are through-hole polyesters. In the Philips CD650 they're tiny SMD and might be ceramic! 😱
Simon
I've got an arcam alpha 5 waiting for some mods as well. I guess, in the end, they all end up with similar components.
Pete
Pete
Yes, so did I but I could only find pps up to 100n. From my reading it seems "top-end" machines used to use 200n (and sometimes 470n on the msb).
I saw some well-priced 1uF PPS @ Farnell. I'm sure 220nF is available too. Not the cheapest but they're said to be good all-round caps for this job.
I've got a set of PPS for this job from Farnell. Not fitted yet tho!
I'm using varying values as per the info on the TDA in EC's NOS thread.
MSB
1uF 9694315
0.22uF 9694277
150nF 1657955
33nF 3835303
33nF 3835303
8.2nF 9694889
8.2nF 9694889
LSB
I think the changing value is all to do with the timing and bounce of the bit landing on the pins. It should help to align the timing and be more accurate. See the link in post 963 for details
Ian
I'm using varying values as per the info on the TDA in EC's NOS thread.
MSB
1uF 9694315
0.22uF 9694277
150nF 1657955
33nF 3835303
33nF 3835303
8.2nF 9694889
8.2nF 9694889
LSB
I think the changing value is all to do with the timing and bounce of the bit landing on the pins. It should help to align the timing and be more accurate. See the link in post 963 for details
Ian
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Nicely compacted info Ian, thanks a lot. I think I'll have to get those values too. I've never heard of anyone using such varying values before.
Simon
Simon
Those are the ECPU ones that I'm actually using. Farnell have them as PPS but if you check the panasonic website for the ECPU series they're listed as plastic resin not PPS.
Maybe just confusion in the name.
Film Capacitors | Passive & Electromechanical | Panasonic Industrial Solutions Global
Pete
Maybe just confusion in the name.
Film Capacitors | Passive & Electromechanical | Panasonic Industrial Solutions Global
Pete
Of those listed, the 1uF and the .22uF are ECPU and the remainder are ECHU.
Are any of them PPS?
Are any of them PPS?
The ECHU seem to be PPS, the ECPU not. I guess the ECPU are still a step up from the standard though.
Pete
Pete
mmmm! Not impressed! I specifically chose pps caps at those values! There are no 1uF EHCU's on Farnel and the 0.22uF are much bigger (2416 size).
I can't see any others anywhere!
😡
I can't see any others anywhere!
😡
I don't think PPS come above 220n, not in pana ECHU anyway. And, as you say they look to be too big. I had good results with the ECPU though.
Pete
Pete
like you say, should be better than std! In the Meridian which is where they are going, they are replacing styrene caps! In the 960 the 1uF on the MSB is a basic mundorf MKP. I wonder how they will compare!!
Arcam use 470n tants on the msb and next. I have no idea of the relevant merits of tants and film caps in this application but it may be an option.
Superreg improvements
Hi,
I'm starting on the mods for my Mission 7000 which is very similar internally to my 160.
I'm very happy with the sound from the 160 where I have seperate LM317 based Rayregs for opamps +-15, DAC +-5,-15, Saa7210 +5 and clock +5.
I have a flea ready for the clock supply in the mission and I'm toying with using bought-in superregs for the other 6 supplies. That's going to cost somewhere between £200 - 240 (depending on whose regs I use). That's quite a lot of money so I'd expect a pretty good step improvement. Anyone else made this step and can advise on results / value for money?
Regards
Pete
Hi,
I'm starting on the mods for my Mission 7000 which is very similar internally to my 160.
I'm very happy with the sound from the 160 where I have seperate LM317 based Rayregs for opamps +-15, DAC +-5,-15, Saa7210 +5 and clock +5.
I have a flea ready for the clock supply in the mission and I'm toying with using bought-in superregs for the other 6 supplies. That's going to cost somewhere between £200 - 240 (depending on whose regs I use). That's quite a lot of money so I'd expect a pretty good step improvement. Anyone else made this step and can advise on results / value for money?
Regards
Pete
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