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Old 30th October 2013, 12:43 AM   #1091
janusz is offline janusz  Australia
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Well, moving mounting hole, C11, C12 and C13 to the right would unblock space in front of SPK GND and euroblock could be used. Anyway, there would be more space around this terminal so connecting cables would be easier.

cheers,
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Old 30th October 2013, 06:32 AM   #1092
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Default Got it ... last change -

C13 /17 spread apart , the 2 fastons backed up a tad. (below)

You could fly an airplane (or a fat finger) between them two caps .

OS
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Old 30th October 2013, 04:10 PM   #1093
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Ostripper,

That's a good looking layout! You've convinced me to order up a few boards.
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Old 30th October 2013, 08:11 PM   #1094
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Quote:
Originally Posted by Carl_Huff View Post
Ostripper,

That's a good looking layout! You've convinced me to order up a few boards.
That what I want to hear ... then this is the one that goes to Variac tonight.
I'll look over any fine points (45 degree angles + no sharp turns on corners).
Look over the screenprint for "ease of construction".
This layout has uniform .6mm+ spacing ,as well ...(UL 60950-1 Table 5B compliant
-DC voltages).
I thought hard on Q13 (Vbe device). For this circuit , the Cob of the devices
would "swamp out' any trace capacitance and having the Vbe cap (10-22uf)
real close to the jumpers virtually eliminates inductive issues (positive rail /output currents).
This style layout = EF2 only !!

A layout like this would not be ideal for a triple output. Any capacitance or inductive feedback
would degrade performance.

I must say , after assembling my Badgers, I was able to export the real world
experience to the upgrade in the layout. Still , the V2.3 board is more
professional looking and adheres to stricter design standards than just about
all the OEM amps I have ever repaired.
OS
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Old 3rd November 2013, 11:41 PM   #1095
rohot01 is offline rohot01  Taiwan
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Hi OS ,guys
I find the questions of my band.
The question is Q14,Q15.
I use TOSHIBA 2SC4793/2SA1837(F,M),it's bad in this band.
And I use onsmi MJE15032 / MJE15033 ,it's OK
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Old 4th November 2013, 01:39 AM   #1096
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Quote:
Originally Posted by rohot01 View Post
Hi OS ,guys
I find the questions of my band.
The question is Q14,Q15.
I use TOSHIBA 2SC4793/2SA1837(F,M),it's bad in this band.
And I use onsmi MJE15032 / MJE15033 ,it's OK
2sc4793/2sa1837 are ok. That's what C18-c19 are for (high Ft driver).

Mje15032/33/34/35 are ideal and have higher current.

Both are OK.

OS
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Old 4th November 2013, 11:56 AM   #1097
rohot01 is offline rohot01  Taiwan
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Quote:
Originally Posted by ostripper View Post
2sc4793/2sa1837 are ok. That's what C18-c19 are for (high Ft driver).

Mje15032/33/34/35 are ideal and have higher current.

Both are OK.

OS
OK!
OS
Thank you for your help
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Old 5th November 2013, 09:41 AM   #1098
Harry3 is offline Harry3  Australia
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What u reckon PCB's b 4 Xmas this year?
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Old 5th November 2013, 03:04 PM   #1099
Variac is offline Variac  United States
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We're workin' on it..
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Old 9th November 2013, 11:43 PM   #1100
lamir35 is offline lamir35  Israel
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What's the total cost for a build? Has anyone measured how it performs?
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