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Old 10th August 2012, 07:34 PM   #2221
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Smile APEX B100 3D

Mile lord, I'm trying to change the B500 with 1 pair of Toshiba, the question is how many volts the maximum that I use? to R 5 Watt, in the last section 0.33 R does have to be replaced?. I deleted some of the components as in the PRO and I do not use NSL32.
regards
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Best regards - Damanhuri
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Old 11th August 2012, 04:28 AM   #2222
presbel is offline presbel  Philippines
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Quote:
Originally Posted by engel dela pena View Post
apex,
but the problem is,how to incorporate this output stage with these driver pcb,
hope to get help this time
Hi Engel,
I am doing an amp using the 12 pairs output with this driver board. I will let you know the results. I hope Mile can guide us how we can incorporate it to the output stage.

Regards,

Rey
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Old 11th August 2012, 04:45 AM   #2223
presbel is offline presbel  Philippines
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Hi Mile,
I have done your B500 with your original PCB and the sound so goood!!! I have done substitution of the capacitor 2X47uf with 1X22uf Nichicon non-polar cap. and the 2X22uf with 1X10uf Nichicon non-polar cap. Is this correct?

Regards.

Rey

Last edited by presbel; 11th August 2012 at 04:56 AM.
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Old 11th August 2012, 06:02 AM   #2224
hadita is offline hadita  Indonesia
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Mile...for the output transistor 8 pairs B500 Tef version is enough suply with 65v ct..?
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Old 11th August 2012, 06:05 AM   #2225
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Quote:
Originally Posted by presbel View Post
Hi Engel,
I am doing an amp using the 12 pairs output with this driver board. I will let you know the results. I hope Mile can guide us how we can incorporate it to the output stage.

Regards,

Rey
thanks presbel,
try to use sprint lay out 5.0 if you can
if you have the tools
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Old 11th August 2012, 12:19 PM   #2226
totski is offline totski  Philippines
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to MR. MIles thanks to your b500 it's another Milestone in audio circuitry, today i tested the amp very good sound, vocal is clear even i used subwoofer speaker and yet you will hear vocals loud and clear pictures and video to be followed,only problem i encountered is your PA protect when i connect to amp 100 watts bulb in series to primary of trafo glow and stays, and 10r 5w series to fuse voltage rails are quickly getting hot. something is wrong with protect.Mr Miles pls. check in short circuit protection diagram PRO terminal in series with 1n4148 in Board it's in wrong position i think pls. check MR.Miles, good day.
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Old 11th August 2012, 05:02 PM   #2227
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Quote:
Originally Posted by totski View Post
to MR. MIles thanks to your b500 it's another Milestone in audio circuitry, today i tested the amp very good sound, vocal is clear even i used subwoofer speaker and yet you will hear vocals loud and clear pictures and video to be followed,only problem i encountered is your PA protect when i connect to amp 100 watts bulb in series to primary of trafo glow and stays, and 10r 5w series to fuse voltage rails are quickly getting hot. something is wrong with protect.Mr Miles pls. check in short circuit protection diagram PRO terminal in series with 1n4148 in Board it's in wrong position i think pls. check MR.Miles, good day.
Short circuit protect is activ only with more than 9A current per outputs (2,8V on resistor 0,33R/5W) and you have AC signal on PRO terminal. You can't have this current with serial bulb and 10R resistors. Short circuit is stres for outputs and you can't have 100% protect, do not short circuit amp out it's risk.
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Old 12th August 2012, 05:37 PM   #2228
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Default B500

need corections...
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Old 12th August 2012, 05:58 PM   #2229
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Quote:
Originally Posted by suryadi5417 View Post
need corections...
Nice work.
Regards
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Old 12th August 2012, 09:15 PM   #2230
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Hello Masood,
I am sorry I read you massage today only. I make my test p.c.b. by hand.This is hoe I do it .First take out a correct size print .cut and clean p.c.b. of same size . fix drawing on p.c.b. with tape on sides. drill all holes. take away the drawing. clean board with 00 no. emry. draw connection with camlin marker pen.Etch with ferric chloride. I am esndin photos of my recent work.
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