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Old 1st May 2018, 03:45 AM   #781
steefdebruijn is offline steefdebruijn  Netherlands
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All links in first post work for me.
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Old 11th May 2018, 05:05 PM   #782
shaan is offline shaan  India
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Join Date: Mar 2009
Location: Kolkata
GB5 Update:

vvs07 - 4 PCBs
Shailesh - 2 PCBs (stereo kit)
steefdebruijn - 4 PCBs
The Prof - 2 PCBs (stereo kit)
passive420 - 2 PCBs + 4 MOSFETs
ginum - 5 PCBs
tandren - 2 PCBs + 4 MOSFETs
7thsense - 2 PCBs
Neurotica - 2 PCBs

Hi everyone.

I am planning to print the next PCB batch soon. Will start sending invoices to GB members in a few days. Please note that I have changed kit orders from outside India to PCB+MOSFET orders as I can't send full kit outside India.

Thanks.
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Old 14th May 2018, 11:11 AM   #783
Neurotica is offline Neurotica  United States
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PeeCeeBee V4 GB!
GB5 Update:

vvs07 - 4 PCBs
Shailesh - 2 PCBs (stereo kit)
steefdebruijn - 4 PCBs
The Prof - 2 PCBs (stereo kit)
passive420 - 2 PCBs + 4 MOSFETs
ginum - 5 PCBs
tandren - 2 PCBs + 4 MOSFETs
7thsense - 2 PCBs
Neurotica - 4 PCBs + 4 MOSFETs
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Old 16th May 2018, 02:15 AM   #784
loafimus is offline loafimus  United States
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Location: Illinois
PeeCeeBee V4 GB!
Shaan,

Starting to plan my build and getting excited here now that the PSU is soon to be on it's way...

I was wondering what your take is on the heatsink requirements for the amp at 35V into an 8ohm load. I've had my eye on the Takachi HY149-43-23SS for a while so it matches the preamp I've got in progress in a similar case. That size is the largest I can source without ridiculous shipping.

According to the datasheet each heatsink is:

L 224.6mm x H 141mm x W 21mm with a 1.06 (C/W) thermal resistance.

To beef it up a bit and make it easier mounting wise, i was thinking of also mounting the Peeceebee to a copper bar like this and then affixing it to the heatsink.

Let me know if you think this would meet any thermal requirements that need to be considered.

Thanks!
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Old 16th May 2018, 08:08 AM   #785
shaan is offline shaan  India
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Hi Loafimus.

The heatsink is fine for v4 with 35v/8r. The copper plate is unnecessary, a thin mica insulator between MOSFETs and heatsink will have better thermal performance.
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Old 16th May 2018, 10:36 AM   #786
passive420 is offline passive420  United Kingdom
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Invoice paid, thanks for your hard work Shaan.
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Old 18th May 2018, 09:23 AM   #787
shaan is offline shaan  India
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Hi Passive420.

The invoice is for shipping charge of the PSU boards. I haven't started sending invoices for V4 boards yet. Will update in this thread when I do.
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