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Old 10th April 2013, 01:21 PM   #971
AKN is offline AKN  Sweden
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Quote:
Originally Posted by PMI View Post
I think the trimmers are intended to be removed, measured, and replaced with matched surface-mount (?) resistors. There is a pic with surface mount trimmers somewhere here.
Hi,

I think the explanation is found here: http://www.diyaudio.com/forums/solid...ml#post3432482
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Old 10th April 2013, 02:18 PM   #972
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Default Capacitor size?

Quote:
Originally Posted by Lazy Cat View Post
Hi guys


Only 8 parts - capacitors would have to be provided by each GB member individually:

- 10 uF MKT, 2 pcs/PCB
- 1000 uF/50 V, 4 pcs/PCB
- 2200 uF/6,3 V, 2 pcs/PCB
Hi LC,

What's the lead spacing of the 1000uF/50V? Digikey has them available as 7.5mm and 5.0mm.

Thanks
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Old 10th April 2013, 02:51 PM   #973
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Default Oh dopey me.

Sorry, found the answer. Post 705.
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Old 10th April 2013, 03:13 PM   #974
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Whouaou.
It looks terrific. So to make it short can I still be in the GB ?
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Old 10th April 2013, 03:30 PM   #975
Telstar is offline Telstar  Italy
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Quote:
Originally Posted by Lazy Cat View Post
- 10 uF MKT, 2 pcs/PCB
- 1000 uF/50 V, 4 pcs/PCB
- 2200 uF/6,3 V, 2 pcs/PCB[/B]

These capacitors should be, as recommendation for the best sound, of top quality available.

I suggest you all to install Vishay-Roederstein and Nichicon, as the best results so far were achieved by these two brands.
Please remind us of suggested parts in the BOM
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Old 10th April 2013, 04:40 PM   #976
Tyimo is offline Tyimo  Hungary
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Quote:
I think the explanation is found here: VSSA Lateral MosFet Amplifier
Thanks!
Unfortunately they are not in the schematic....
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Old 10th April 2013, 04:41 PM   #977
Tyimo is offline Tyimo  Hungary
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How critical are the values of the 22pF and 100pF caps??? Should I use bigger values?
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Old 10th April 2013, 06:45 PM   #978
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Exclamation VSSA GB material info

Quote:
Originally Posted by androuski View Post
Whouaou.
It looks terrific. So to make it short can I still be in the GB ?
Yes, there will be 250 sets in this GB, so at this time there are still some 30 PCB sets available.

Capacitor dimensions for VSSA PCB:

- 10 uF/63 V, MKT, Vishay-Roederstein, 2 pcs
Lead Spacing: 15 mm
External Depth: 8.5 mm
External Height: 17.5 mm
External Width: 18 mm

- 2200 uF/6,3 V, FG, Nichicon, 2 pcs
Lead Spacing: 5 mm
External Diameter: 12,5 mm
External Height: 25 mm

- 1000 uF/50 V, FG, Nichicon, 4 pcs
Lead Spacing: 7,5 mm
External Diameter: 16 mm
External Height: 31,5 mm


Three preinstalled SMD trimmers will be permanently located on PCB, type 5 tourns, Bourns, for DC offset/VAS bias (2) and output bias (1) setting.

I will also add a Kapton insulator for TO-247 and two plastic spacers for TO-126.

Assembling and calibration will be straightforward and very simple.

Regards Andrej
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Old 10th April 2013, 06:57 PM   #979
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Quote:
Originally Posted by Lazy Cat View Post
Yes, there will be 250 sets in this GB, so at this time there are still some 30 PCB sets available.

Capacitor dimensions for VSSA PCB:

- 10 uF/63 V, MKT, Vishay-Roederstein, 2 pcs
Lead Spacing: 15 mm
External Depth: 8.5 mm
External Height: 17.5 mm
External Width: 18 mm

- 2200 uF/6,3 V, FG, Nichicon, 2 pcs
Lead Spacing: 5 mm
External Diameter: 12,5 mm
External Height: 25 mm

- 1000 uF/50 V, FG, Nichicon, 4 pcs
Lead Spacing: 7,5 mm
External Diameter: 16 mm
External Height: 31,5 mm


Three preinstalled SMD trimmers will be permanently located on PCB, type 5 tourns, Bourns, for DC offset/VAS bias (2) and output bias (1) setting.

I will also add a Kapton insulator for TO-247 and two plastic spacers for TO-126.

Assembling and calibration will be straightforward and very simple.

Regards Andrej

Andrej you are

Marc
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Old 10th April 2013, 07:56 PM   #980
wewe is offline wewe  Sweden
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Dear Lazy Cat if its possible, not to late i will take 1 set for stereo
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