RMI-FC100, a single stage audio power amplifier - Page 25 - diyAudio
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Old 26th January 2008, 07:00 PM   #241
Bob03 is offline Bob03  Canada
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Cool Yes it is

.
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Old 26th January 2008, 09:47 PM   #242
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Roender, The original schematic at the beginning of the post only shows 5 of the thermal trac diodes connected in the diode string. Where is the sixth thermal trac diode connected? Tad
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Old 27th January 2008, 05:59 AM   #243
roender is offline roender  Romania
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It is routed in the PCB but in short circuit. See pictures below.
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Old 28th January 2008, 07:13 PM   #244
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Roender, what's the spec for D7 and D8 in your front end power supply?

What is the dimension of the heat sink? do you think it is the right size? or you would go bigger/smaller?
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Old 28th January 2008, 07:50 PM   #245
AndrewT is offline AndrewT  Scotland
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Hi,
only just found and couldn't stop reading this thread.

Roender,
Superb.

Could the quality of sound be, in part, due to the very few capacitors in this design, nine in all? There are twice as many transistors (18) excluding the 6output devices and almost all of these are high fT and high hFE.
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Old 28th January 2008, 09:23 PM   #246
roender is offline roender  Romania
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Quote:
Originally posted by niner
Roender, what's the spec for D7 and D8 in your front end power supply?

What is the dimension of the heat sink? do you think it is the right size? or you would go bigger/smaller?
http://www.diyaudio.com/forums/showt...22#post1354022
The heatsink has 0.37C/W (300x150x25mm).
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Old 28th January 2008, 09:25 PM   #247
roender is offline roender  Romania
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Quote:
Originally posted by AndrewT

Could the quality of sound be, in part, due to the very few capacitors in this design, nine in all? .



Thank you Andrew.
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Old 28th January 2008, 09:25 PM   #248
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Thanks Roender, I saw that, but I'm not familiar with Z39. Is it a 39v zener?
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Old 28th January 2008, 09:41 PM   #249
roender is offline roender  Romania
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Hi niner,

I make a little mistake in the frontend PSU BOM, it is a 36V zener diode, not 39V.

Thanks,
Mihai
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Old 28th January 2008, 09:51 PM   #250
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Thanks Mihai.

I have most of parts in my procession. Only things I need is PCBs and transformers. Hopefully I can start the build in a week.
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