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Old 22nd May 2013, 08:39 AM   #4301
ianc13 is offline ianc13  United Kingdom
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I'd have to agree with permaneder. The bias and the DC offset is rock solid after a bit of warm up time.

Actually the DC offset varies very, very little after initial start up. The bias takes a little longer to completely settle, but it gets very close quickly and then very slowly gets to final values after the amp has warmed through.
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Old 22nd May 2013, 10:19 AM   #4302
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What sort of range of offsets do you guys see on startup and settle ? +/- 20 mv then maybe half that after some time ?
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Old 22nd May 2013, 02:08 PM   #4303
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On my F6 I ran 1.5A through the R100s. There was .05 ohms on the positive side. Voltage from my LC dual mono was 25V. Offset was 10mV or so upon startup and settled in at 3-4mV.

Unit is now apart - Will become Funny^6
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Old 22nd May 2013, 05:21 PM   #4304
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Quote:
Originally Posted by flocchini View Post
On my F6 I ran 1.5A through the R100s. There was .05 ohms on the positive side. Voltage from my LC dual mono was 25V. Offset was 10mV or so upon startup and settled in at 3-4mV.

Unit is now apart - Will become Funny^6
Mine does behave similar. I just measured it the first time after eight or nine weeks of its young life. Offset is ~10mV on both channels after a few seconds upon start-up and settles in at <1mV at one channel and <5mV at the other after warm-up. I could reajust the "worse" side. Don't know why I should yet.
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Old 23rd May 2013, 12:11 AM   #4305
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It seems to me that the bias network design in this amp is truly a work of art!
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Old 3rd June 2013, 09:54 PM   #4306
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Old 3rd June 2013, 10:11 PM   #4307
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did anyone spotted any new word ?

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Old 3rd June 2013, 10:18 PM   #4308
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Seems to be holding its own....thanks to Nelson's scalpel. If he likes F5 better......
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Old 3rd June 2013, 10:31 PM   #4309
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naah

M2 is still my fave



(if counting strictly non-parts-made-of-preputium FW amps )
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Old 3rd June 2013, 10:34 PM   #4310
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It is next on the list for that very reason.
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