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Old 24th August 2013, 04:28 PM   #41
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Impressive workmanship.
Thank you sir. Where in PA are you?
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Old 24th August 2013, 04:31 PM   #42
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Thank you sir. Where in PA are you?
I am in Spring Mount which is close to Collegeville where Ursinus college is.
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Old 24th August 2013, 05:07 PM   #43
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Maybe I'll crank it up this afternoon and see what happens.
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Old 26th August 2013, 03:36 AM   #44
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Maybe you did....

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Old 26th August 2013, 02:09 PM   #45
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I am in Spring Mount which is close to Collegeville where Ursinus college is
I'm in Wayne, PA!
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Old 26th August 2013, 02:14 PM   #46
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I'm in Wayne, PA!
We are close. Hopefully we'll get together someday.
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Old 26th August 2013, 02:18 PM   #47
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Sure, let me know.
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Old 26th August 2013, 02:55 PM   #48
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Maybe you did....

Hi Nelson, no I didn't! The weather was too nice here on the east coast to sit inside and play with potentiometers. Definitely will do it though.
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Old 7th September 2013, 10:53 AM   #49
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Default correct bias

Hi! i am confused. hope someone can help.
i canīt bias my F5 to 0.6 v (R11/R12). when i have .36 v the voltage at R3/R4 is 4.6 v. what is wrong?
the temperature of the heatsink (which is 300 x 150 mm per channel) is after (2 hours) 46 celsius, the transistors about 72 celsius.
thanks, mario
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Old 7th September 2013, 11:01 AM   #50
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...........the temperature of the heatsink.......is .....46 celsius, the transistors about 72 celsius.........
26Cdegrees between transistors and heatsink indicates a problem with Rth c-s
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