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Old 20th April 2012, 02:34 PM   #1981
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by nikosokey View Post
.....input 1.55 rms 2.19 p-p.....
learn to hit the right buttons on your calculator.

1.55Vac sinewave = 4.38Vpp
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Old 21st April 2012, 01:21 PM   #1982
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Quote:
Originally Posted by nikosokey View Post
The plan of the amplifier shows two resistors 15κ-10κ to give result 6Κ who in relation to the resistance value 330Ω give a gain value Χ 18,18 Resistance value 8,2K relation to the resistance value 330Ω give a gain value Χ 24,84 when i put 8,2k i get more wide square wave and the sound more clear/

Any advice please??
Have a look at my post #1776
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Old 21st April 2012, 01:37 PM   #1983
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Quote:
Originally Posted by tommy1000 View Post
Have a look at my post #1776
i think use 7.5K and 270R, gain ~ 30, it is good..

I have some illustrations complete amplifier, and amplifier measurements here:

Diy GM Telos amplifier
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Last edited by quanghao; 21st April 2012 at 01:40 PM.
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Old 24th April 2012, 06:47 AM   #1984
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hi there, well done.....it looks great.
Apologies for asking, but do you have a final parts list for the build? I only ask as I bought the boards sometime ago, then suddenly there was alot of do's and do'nts, should be this this way/ or the other, so sadly I lost interest. Today I have log-in after quite some time and spotted your finished Amps..they look great. Cheers, Nicholas
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Old 24th April 2012, 07:33 AM   #1985
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Vitalica:

Your build is greats!!!
What's the brand of toroid transformer? It's look very nice.
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Old 24th April 2012, 08:17 AM   #1986
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Gain -volts output
Attached Files
File Type: pdf FP14000_inputsense_IS-FP14000.pdf (104.4 KB, 314 views)
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Old 4th May 2012, 10:10 AM   #1987
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Quote:
Originally Posted by Walkalone View Post
Vitalica:

Your build is greats!!!
What's the brand of toroid transformer? It's look very nice.

TOROIDY.PL Transformatory Toroidalne Producent, Audio, Separacyjne, Trójfazowe, 230/110V, 110/230V, Na zamówienie
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Old 4th May 2012, 11:15 AM   #1988
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Quote:
Originally Posted by littleboyblue View Post
hi there, well done.....it looks great.
Apologies for asking, but do you have a final parts list for the build? I only ask as I bought the boards sometime ago, then suddenly there was alot of do's and do'nts, should be this this way/ or the other, so sadly I lost interest. Today I have log-in after quite some time and spotted your finished Amps..they look great. Cheers, Nicholas
Hi Nicholas,

I hope that is all the information here

I'm on the board:

C3= 4,7PF
C5 = 10PF
C6 = 4,7PF
C7 = 4,7PF
T7 between B-C: 4,7PF
R20 = 330R (bias 100ma per transistor)

Transformers (TOROIDY.PL Transformatory Toroidalne Producent, Audio, Separacyjne, Trójfazowe, 230/110V, 110/230V, Na zamówienie) : 2x50V/500W (2 bridges for channel)
It is the same 2x50V /500mA for BD249/BD250

from the bottom PCB - 2x 10000/100V.
on PCB - 2x4700/100V.

Best regards.
Attached Images
File Type: gif Schematic.GIF (44.2 KB, 983 views)
Attached Files
File Type: pdf PCB.2. Goldmund9.2.pdf (119.1 KB, 354 views)
File Type: pdf bom Goldmund 9.2.pdf (54.3 KB, 270 views)

Last edited by vitalica; 4th May 2012 at 11:30 AM.
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Old 6th May 2012, 04:44 AM   #1989
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Hi vitalica,

There is a newer schematic, see blow

Somewhere between page 160-170, this new sch. surfaced. The thing I worried most is the T6 which has its CE 'reversed'. Worth discussion? I had a modified pcb laid for this new sch. too.

BP
Attached Files
File Type: pdf GOLDMUND NEW SCHEMATIC PDF..pdf (121.0 KB, 419 views)
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Old 6th May 2012, 05:50 AM   #1990
Jay is offline Jay  Indonesia
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Quote:
Originally Posted by bigpanda View Post
The thing I worried most is the T6 which has its CE 'reversed'. Worth discussion?
Why worry about it. There are many other things that are more critical and need attention (PCB track, actual measurement, component size and quality, etc). The amp is good but not because of T6. You can even use your favorite ccs if you have one.
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