LME49811 + Sanken STD03N/P - Page 4

tomchr · 21st February 2010, 04:57 AM

In my prototype, I'm running about 7 mA through the diode stack and 75 mA through the output devices. I'm not seeing any bias stability issues. The supply voltage is +/-45 V.

This is with a tiny heat sink and my target supply voltage is +/-60 V. But still... Looks darn good.

I'm currently using 1.5 kOhm between the SINK and SOURCE pins.

I've measured the THD at output powers from 100 uW to 1 W as this is where the amp is likely to operate the majority of the time for casual listening. I don't see any harmonics peek up above the noise floor (85 dB dynamic range on the test gear) until I hit 1 W output. The THD graph posted a few posts back looks like my results.

For those interested, I have more details in this thread.

~Tom

Telstar · 14th February 2011, 07:04 PM

Interesting devices these sanken darlingtons.

ADNAAN · 8th November 2011, 07:45 AM

JACINNJ VERY GOOD AND GREAT IDEA FOR MONITORING INDICATION OF METER THANKSSSSSSSSSSSSSSSSSSSSSSSSS

AndrewT · 8th November 2011, 03:08 PM

WHAT, I can't hear you over the noise.

14th February 2011, 07:04 PM	#32
Telstar diyAudio Member Join Date: Dec 2007	Interesting devices these sanken darlingtons. __________________ The response of the inner ear extends to at least 200khz - Dr W. Tempest

8th November 2011, 03:08 PM	#34
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	WHAT, I can't hear you over the noise. __________________ regards Andrew T.

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21st February 2010, 04:57 AM	#31
tomchr diyAudio Member Join Date: Feb 2009 Location: Greater Seattle Area	In my prototype, I'm running about 7 mA through the diode stack and 75 mA through the output devices. I'm not seeing any bias stability issues. The supply voltage is +/-45 V. This is with a tiny heat sink and my target supply voltage is +/-60 V. But still... Looks darn good. I'm currently using 1.5 kOhm between the SINK and SOURCE pins. I've measured the THD at output powers from 100 uW to 1 W as this is where the amp is likely to operate the majority of the time for casual listening. I don't see any harmonics peek up above the noise floor (85 dB dynamic range on the test gear) until I hit 1 W output. The THD graph posted a few posts back looks like my results. For those interested, I have more details in this thread. ~Tom

8th November 2011, 07:45 AM	#33
ADNAAN diyAudio Member Join Date: Dec 2009	JACINNJ VERY GOOD AND GREAT IDEA FOR MONITORING INDICATION OF METER THANKSSSSSSSSSSSSSSSSSSSSSSSSS

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