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The Phonoclone and VSPS PCB Help Desk
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Old 2nd January 2018, 01:47 AM   #3881
rjm is offline rjm  Japan
Richard Murdey
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Default SwitchBoard (Switch6) 1.0b

First-eyes BOM for review/comment.
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File Type: png pcb-switch6-10d-sch.png (25.2 KB, 306 views)
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Old 3rd January 2018, 09:20 PM   #3882
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I ordered a few Switchboards. I don't anticipate much demand, if you want one let me know. I can send for free with e.g. Emerald boards or for a nominal $5 shipping fee.
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Old 4th January 2018, 09:50 PM   #3883
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A few photos of the latest phono stage boards, assembled. Phonoclone 4.6f and Emerald 1.0s.

[photo nerd stuff: Nikon D750 | Ai Nikkor 55mm F2.8S | 2x SB-800, reflector]
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Old 5th January 2018, 07:03 AM   #3884
k1965813 is offline k1965813  Taiwan
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Working on my Emerald
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Old 7th January 2018, 06:23 AM   #3885
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Quote:
Originally Posted by k1965813 View Post
Working on my Emerald
I was expecting a "part II" ...

( I guess I got a head start as the case was already made! )

[Build details: as per the 10s9 BOM with Nichicon Muse KZ, Takman REY for R1-5, and Multicap PPFXS 2.0 uF 100 V for C3. RCA are Oyaide RJ-127HRh a relatively inexpensive rhodium plated part.]
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Last edited by rjm; 7th January 2018 at 06:37 AM.
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Old 7th January 2018, 12:23 PM   #3886
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It's time to play that game again. I was sent an older Phonoclone 3 recently to check out, so I had a chance to compare it against the fully kitted out Emerald 1.0s pictured above.

The Emerald hasn't had a chance to break yet, but since all the small details are masked by the digital recording anyway it doesn't really matter. These are recorded through the Sapphire preamp at 3 dB gain, mainly for convenience .... it doesn't change the sound any.

AL Stewart - On the Border - Emerald 1.0s

Al Stewart - On the Border - Phonoclone 3.5h

I was pleasantly surprised by the PC3. I'd kinda written off the X-Reg but in isolation it sounds fine - clear and clean, with excellent resolution. Just, relative to the S-Reg boards, a little bit harsh and with a somewhat confused soundstage.

I think that comes through in the wav files. A lot of the additional goodness of the Emerald is unfortunately lost. As for the difference between the 1.0s and 1.0c (i.e. changing to the MUSE KZ caps, primarily) the initial impression was of more "weight" but it's hard to say with certainty.
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Old 9th January 2018, 11:50 PM   #3887
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Photo of completed SwitchBoard 1.0d, 1k, 221R,100R,22R1 and 100pF x2 as per the BOM.

I'm thinking it might be more intuitive to rotate the "B" channel parts so that both DIP switched point "up" and the parts are numbered 1-6 and 1-6 rather than 1-6 and 6-1. Opinions? It's all one and the same from the electrical layout point of view.
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Old 10th January 2018, 05:39 AM   #3888
CHiroshi is offline CHiroshi  Sweden
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Hmm... I would rather rotate the print on channel B, then it would be perfect mirror symmetry.... But that's just me...

Last edited by CHiroshi; 10th January 2018 at 05:44 AM.
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Old 10th January 2018, 06:25 AM   #3889
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It's not actually possible to do that in Eagle. Text labels cannot be rotated to display "upside down".

The best I can do is as shown, which personally feels more "wrong" to me than the current layout.
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Last edited by rjm; 10th January 2018 at 06:41 AM.
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Old 10th January 2018, 06:43 AM   #3890
CHiroshi is offline CHiroshi  Sweden
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Ah, well there it is then...
In that case I still think the simmetry in the layout is kind of neat, visually speaking. But yes, for some it might be more intuitive to rotate the B parts... But i honestly think one would get used to it as it is!
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