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Old 5th October 2013, 05:18 AM   #1041
Harry3 is offline Harry3  Australia
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Re PCB:

I would like to see an option to use larger lead spacing for C5.
Option to use the easier to get 0R22 "cement" type resistors in the output stage.
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Old 5th October 2013, 05:19 AM   #1042
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Quote:
Originally Posted by ostripper View Post
The latest option of adding the baker clamp to the VAS should remain an option as some DIY'ers are picky. Using the best diode, I see it as good option. As with current limiting and DC protection, some audiophiles feel that the diode would detract for the audio, is this case, use a 70v rail. . . and do not clip the amp.
Thanks for the responses. Whichever way the answer went, I needed the information. Much appreciated!
I like the latter option of tall rails. In that case, the Honey Badger is a lot more powerful than the speaker and thus amplifier clipping is not used. Makes sense.
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Old 5th October 2013, 05:26 AM   #1043
AJT is offline AJT  Philippines
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Quote:
Originally Posted by Harry3 View Post
Re PCB:

I would like to see an option to use larger lead spacing for C5.
Option to use the easier to get 0R22 "cement" type resistors in the output stage.
+1, and also if some holes can be made larger to ease insertion of some parts around power resistors and supply caps..
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Old 5th October 2013, 05:29 AM   #1044
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Quote:
Originally Posted by danielwritesbac View Post
Thanks for the responses. Whichever way the answer went, I needed the information. Much appreciated!
I like the latter option of tall rails. In that case, the Honey Badger is a lot more powerful than the speaker and thus amplifier clipping is not used. Makes sense.
I wasn't mad , but I had to explain "why".

The documentation should be updated. I wrote the preliminary standard and "options" text.

The options text basically explains how each section works and gives you all the choices. Some do not like choices and would prefer others to make them .. I understand. So .... a default " build it this way or die" guide is for them.

The guide Jo Jo made is excellent and professional , perhaps we could get together and update it.

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Old 5th October 2013, 05:41 AM   #1045
Harry3 is offline Harry3  Australia
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Default PCB

Looking at the above photo - it would help if the lead spacing for the 0.25/ 0.5 Watt resistor is increased.
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Old 5th October 2013, 06:15 AM   #1046
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Originally Posted by AJT View Post
+1, and also if some holes can be made larger to ease insertion of some parts around power resistors and supply caps..
I did that. Some said the large diodes and some transistors were tight.

I researched all the caps, transistors , diodes and made the hole pitch at least .15mm larger than the largest expected leads.

C5 = I will do it - even make it multi pitch ! (3.5 + 5mm).

I really would like to make 25mm emitter resistor lead spacing for the "cement ones".

(below) is what I originally designed for ... (attachment 1)NOBLE 0.22/5W Resistor (5 pcs)_NOBLE_Resistor_Analog Metric - DIY Audio Kit

Also... 3W ceramics can fit the badger's 12.5mm LS.

The issue of 25mm spaced devices is that you would need to run the output bus half way (down the middle of the board).
Then you would either have to migrate some of the circuit into the section of the board that has the high current rail traces or the other OPS signal paths.
It's best to keep these small signal /high impedance sections far away from the currents.

The old amps used those 25mm monsters (attachment 2) , as most had separate OPS boards.
New ones use either the single noble's or the dual ones. (below attachment 3+4).
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File Type: jpg noble emitter.jpg (12.3 KB, 253 views)
File Type: jpg separate.jpg (69.4 KB, 234 views)
File Type: jpg newamp.jpg (26.3 KB, 231 views)
File Type: jpg dual.jpg (5.7 KB, 228 views)
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Last edited by ostripper; 5th October 2013 at 06:18 AM.
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Old 5th October 2013, 06:16 AM   #1047
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Originally Posted by Harry3 View Post
Looking at the above photo - it would help if the lead spacing for the 0.25/ 0.5 Watt resistor is increased.
Which ones ? .... R- XX ??

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Old 5th October 2013, 06:27 AM   #1048
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Just noticed AJT's badger's ... I want mine to look that good !! (much envy)

They look really good w/ 25mm emitter's ... but those 12.5 zoble resistors would be the cat's meow...

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Old 5th October 2013, 06:32 AM   #1049
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Ok ...

C5 + R23 + R27

C5 = more room and multi-pitch.

R23/27 = 2mm greater lead spacing.

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Old 5th October 2013, 07:06 AM   #1050
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Luckily, I was able to find those Noble resistors in my stash... though I must admit that those 25mm types are far more easier to acquire, globally.
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