Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
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Post by Bigman80 on Dec 17, 2019 22:21:08 GMT
I might do something completely bonkers though lol Who, you? Gerraway wit ya!!…. Not like me at all is it lol |
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Deleted
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Post by Deleted on Dec 18, 2019 8:36:51 GMT
Well don't try brushing against girls on trains.
It got me into all sorts of bother. 😟
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Deleted
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Post by Deleted on Dec 18, 2019 8:41:01 GMT
Well don't try brushing against girls on trains. It got me into all sorts of bother. 😟 Well at least you weren't brushing against blokes. |
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Deleted
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Post by Deleted on Dec 18, 2019 9:10:14 GMT
That's what I said !
😁👍
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Post by sq225917 on Dec 18, 2019 17:40:25 GMT
Just buy them in stages, defo vishay for the 10k and riaa, ten parts in total, 120 from TC.
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Bigman80
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Post by Bigman80 on Dec 18, 2019 18:27:57 GMT
Just buy them in stages, defo vishay for the 10k and riaa, ten parts in total, 120 from TC. OK, I will. Genuinely, I will try and build the best version I can. It'll just take longer. |
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Post by sq225917 on Dec 19, 2019 22:51:20 GMT
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Post by sq225917 on Dec 20, 2019 21:11:26 GMT
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Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
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Post by Bigman80 on Dec 20, 2019 21:22:53 GMT
Very tidy. Are they the "new" boards or some of the originals? |
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Post by sq225917 on Dec 21, 2019 7:34:05 GMT
Originals, the last rev, v 3.1, nothing but the best baby.
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Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
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Post by Bigman80 on Dec 21, 2019 8:43:17 GMT
Originals, the last rev, v 3.1, nothing but the best baby. Will there be any difference between these new boards and the ones you have there? Obviously not including the hangover parts. |
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Post by alit on Dec 21, 2019 13:07:22 GMT
Yeh it has to be the 75s. I'll link to my complete bom if you like, I need to update a few bits. Are you going vanilla, or vishay naked? I’m on the list too, could you send a link to your bom please Simon? |
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Post by sq225917 on Dec 21, 2019 16:15:30 GMT
Yeh, I need to update it as the last order was only a partial. Will do after new year.
His main boards look similar to the rev 2 boards, the 3.1 have four compensation caps on the shunt to limit the bandwidth and eliminate a potential instability that a few builders had from using high beta parts.
You can fit them directly to the transistor legs.
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Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
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Post by Bigman80 on Dec 21, 2019 16:26:36 GMT
Yeh, I need to update it as the last order was only a partial. Will do after new year. His main boards look similar to the rev 2 boards, the 3.1 have four compensation caps on the shunt to limit the bandwidth and eliminate a potential instability that a few builders had from using high beta parts. You can fit them directly to the transistor legs. Ah cool. I think I may have a matched quad of the SK170's in my parts box. Just about to dig them out and see. I'll post a pic. They came from a German guy when I built the first DCB1 and they weren't cheap. Defo genuine though. |
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Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,399
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Post by Bigman80 on Dec 21, 2019 17:32:34 GMT
Are these what we were talking about?   |
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Post by sq225917 on Dec 21, 2019 22:00:08 GMT
Yeh they'll do, from Alweit?
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Post by sq225917 on Dec 21, 2019 22:00:41 GMT
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Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,399
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Post by Bigman80 on Dec 21, 2019 22:34:56 GMT
Yeh they'll do, from Alweit? I don't know mate. Steve, who built the DCB1 at the same time of me, got them. Said he'd found a German fella, via a website and he bought a shed load. Sent me these and another quad, but they were used. |
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Post by antonio on Dec 22, 2019 5:51:50 GMT
Nice photo of your kitchen/workshop also.  Attachments:
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Post by sq225917 on Dec 22, 2019 11:23:32 GMT
New kitchen is just going in, floor went down yesterday.
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Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,399
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Post by Bigman80 on Dec 22, 2019 11:48:47 GMT
New kitchen is just going in, floor went down yesterday. Looks tidy! Doing it yourself? |
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Post by sq225917 on Dec 22, 2019 20:02:55 GMT
F#ck no, builders did the building, I did some 2nd fix, misterdog is doing the kitchen, I did all the p&d. Just the doors to go on, island to finish and bottoms to go on.
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Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,399
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Post by Bigman80 on Dec 22, 2019 21:26:51 GMT
F#ck no, builders did the building, I did some 2nd fix, misterdog is doing the kitchen, I did all the p&d. Just the doors to go on, island to finish and bottoms to go on. Haha, fair enough. |
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Post by sq225917 on Dec 23, 2019 1:08:41 GMT
No point having a dog and barking myself, misterdogs day job is kitchen design and hand making. It's a nice piece, for pennies on the pound.
I'll be building him hifi forever to pay him back the man hours.
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Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,399
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Post by Bigman80 on Dec 23, 2019 8:21:39 GMT
No point having a dog and barking myself, misterdogs day job is kitchen design and hand making. It's a nice piece, for pennies on the pound. I'll be building him hifi forever to pay him back the man hours. Ah well that's a decent Trade imo. I always think I'd rather do a few extra days at what I do, to pay someone to do what they do every day. |
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Post by firebottle on Dec 23, 2019 16:15:49 GMT
Here's am interesting post about Paradise phono stages:
'I´ve build a few Paradise phono stages so far. Performance may depend a tiny bit on what kind of PSU design you go for. There´s a C-R-C as well as a C-L-C design for main PSU, there are current sink designs used as a pre-regulator that can be added to the supply rails additionally.
But since the Paradise design is merely made around perfectly regulated current and amplification design habbits there´s nothing a power conditioner can ad in aspects of performance. If you take their performance in question it´s more likely about what version was build (which type of main PSU, with or without additional regulators, what resistors and what caps were used and how close transitors were matched) and what kind of transformers you used. Furthermore there are more than one choise for the RIAA. Following strictly to the early documentation you implemented the EQ curve prefered by Joachim Gerhard but beeing not exactly the RIAA curve. Joachims EQ curve sounds really tempting with a slightly accentuation of bass and lower midrange making the Paradise a rocker.
For instance the C-L-C PCBs sold back than were made to be combined with print transformers, where the first batch of these tiny transformers were humming like wild, the second batch either but not that heavy. I´ve went on to cut the PCB and use toroidal transformers with much more current and got it dead silent.'
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Bigman80
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The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,399
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Post by Bigman80 on Dec 23, 2019 17:38:38 GMT
Here's am interesting post about Paradise phono stages: 'I´ve build a few Paradise phono stages so far. Performance may depend a tiny bit on what kind of PSU design you go for. There´s a C-R-C as well as a C-L-C design for main PSU, there are current sink designs used as a pre-regulator that can be added to the supply rails additionally. But since the Paradise design is merely made around perfectly regulated current and amplification design habbits there´s nothing a power conditioner can ad in aspects of performance. If you take their performance in question it´s more likely about what version was build (which type of main PSU, with or without additional regulators, what resistors and what caps were used and how close transitors were matched) and what kind of transformers you used. Furthermore there are more than one choise for the RIAA. Following strictly to the early documentation you implemented the EQ curve prefered by Joachim Gerhard but beeing not exactly the RIAA curve. Joachims EQ curve sounds really tempting with a slightly accentuation of bass and lower midrange making the Paradise a rocker. For instance the C-L-C PCBs sold back than were made to be combined with print transformers, where the first batch of these tiny transformers were humming like wild, the second batch either but not that heavy. I´ve went on to cut the PCB and use toroidal transformers with much more current and got it dead silent.' I was told about the various RIAA "tuning" possibilities a while back by Angus. As you know Al, I'd be dead set again anything other than the most accurate RIAA possible, which if I remember rightly, SQ says his is to 0.3% Thankfully, SQ's BOM has been offered to me, which I'll gratefully accept and as you know, we will measure the b'jesus out of it when it's done. Then Angus can have his way with it too. Obviously, if the PSU is going to play a larger factor than I realised, I would have to go for the best solution. Can't have any excuse for it not performing at its best as its going to be right up against two phonostages that are really very good. Best start reading or looking for the available options! |
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Post by sq225917 on Dec 23, 2019 18:35:22 GMT
The original paradise psu was actually traffo, dual mono common mode choke, diodes then, lcrc.
My preference is traffo dual mono common choke, snubbers, diodes clcrc.
Whatever you use it absolutely should not be fed with a regulated supply, it simply wont have sufficient bandwidth to feed the shunts which regulate into the mhz range.
The first stage must be passively filtered only.
I've tried various flavours and values of parts. 2x headroom on current seems to be the sweet spot for the pre reg section and clcrc is my preferred option for pre reg filtering.
The deviation from ruler flat eq is much less important than the channel matching and pos/neg rail matching at all 3 test points, shunt output, and the input and riaa current mirrors.
I have psu boards for a limited number of builders should they opt for that. I've put yours aside Oli.
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Post by sq225917 on Dec 23, 2019 18:39:43 GMT
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Bigman80
Grandmaster
The HiFi Bear/Audioaddicts/Bigbottle Owner
Posts: 16,399
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Post by Bigman80 on Dec 23, 2019 19:21:07 GMT
The original paradise psu was actually traffo, dual mono common mode choke, diodes then, lcrc. My preference is traffo dual mono common choke, snubbers, diodes clcrc. Whatever you use it absolutely should not be fed with a regulated supply, it simply wont have sufficient bandwidth to feed the shunts which regulate into the mhz range. The first stage must be passively filtered only. I've tried various flavours and values of parts. 2x headroom on current seems to be the sweet spot for the pre reg section and clcrc is my preferred option for pre reg filtering. The deviation from ruler flat eq is much less important than the channel matching and pos/neg rail matching at all 3 test points, shunt output, and the input and riaa current mirrors. I have psu boards for a limited number of builders should they opt for that. I've put yours aside Oli. Thank you 😊 |
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