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The Pioneer Super Linear Circuit
The Pioneer Super Linear Circuit
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Old 7th September 2018, 02:16 AM   #231
passive420 is offline passive420  United Kingdom
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Join Date: Jun 2013
Nearly there folks. The Xen motherboard from SB is very neat. 25VA per channel, CREE diodes, all good.

Now I have to say the SHPP board was very difficult for me with the listed parts, the pads are incredibly tight around the op amp so will get smaller parts in and try again. I'm just not happy with my work on the board right now. A pic below shows the mess, shameful... I'm worried about fussing too much and overheating.

For anybody about to start their build, I highly recommend heeding the advice in the PDF regarding smaller case sizes for the SHPP, especially for C1,2,11,12 - 1206, 10Uf 25V, change to 0805 package. All 0805 resistors could do with 0603 if you can manage the smaller size.

On the other hand the Xfeed board is a nice little assembly. Looking forward to hearing how it performs. Unfortunately I had to connect the circuit permanently on, so will bypass at the pot pins if needed.
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Last edited by passive420; 7th September 2018 at 02:20 AM.
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Old 7th September 2018, 03:04 AM   #232
passive420 is offline passive420  United Kingdom
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A look at the CSS boards and how they are mounted if anyone was interested.

....you see things in close ups that were missed. I will flow the Sanken pins on the underside.
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Last edited by passive420; 7th September 2018 at 03:11 AM.
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Old 7th September 2018, 04:10 AM   #233
passive420 is offline passive420  United Kingdom
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Error corrected
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Old 7th September 2018, 04:29 AM   #234
Morde is offline Morde  Finland
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Looking good! I'm happy that I got me a pair of SB's motherboards too for up-coming projects. What are the measurements of your aluminum angle? 60*40*6mm? I'm thinking of ordering some from eBay...
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Last edited by Morde; 7th September 2018 at 04:30 AM. Reason: typo
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Old 7th September 2018, 04:58 AM   #235
EUVL is offline EUVL  Europe
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Join Date: Oct 2003
If there is demand we shall offer a revised version of our original motherboard with improved layout.
2mm boards with cutout, so will not be entirely cheap.
But a through-hole passive XFD is included on board.
SHPP not, as it will then be impossible to solder.

The trick to solder the SHPP is to start from the moddle and work outwards.
Use solder iorn to meld a tiny bit of solder on one pad, and then shift in the part sideways to push away the iron tip.
Then just heat and let solder suck in on the other end.
Use 0.35mm low-temperature solders (mine has 4% silver).

I just use 40x40x2mm angle and connect them thermally to the side heaatsinks of the 2107 case.



Patrick
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Old 8th September 2018, 08:32 PM   #236
passive420 is offline passive420  United Kingdom
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Quote:
Originally Posted by Morde View Post
Looking good! I'm happy that I got me a pair of SB's motherboards too for up-coming projects. What are the measurements of your aluminum angle? 60*40*6mm? I'm thinking of ordering some from eBay...
Sorry Martti, just seen this.

the angle was from here, 50.8mm x 38.1mm x 6.35mm (2" x 1 1/2" x 1/4")

2" x 1 1/2" Aluminium Angle | 1/4" | Metals4u

It is a little too tall but you need to clear the 35mm caps. Patricks method like his F5-HA is a good one

http://xen-audio.com/documents/f5ha/...ion%20V1.4.pdf
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Old 8th September 2018, 08:35 PM   #237
passive420 is offline passive420  United Kingdom
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Patrick I'm up for a Xen Motherboard please.

Do you have a spare SHPP available, and perhaps a few of your Jung/Didden reg boards?
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