Bijou Headphone Amplifier build

Post by **Nick** » Wed Sep 14, 2011 8:34 am

For some values of equivalent.

Ali Tait · Post by **Ali Tait** » Wed Sep 14, 2011 8:48 am

Work in the dac?

Ali Tait · Post by **Ali Tait** » Wed Sep 14, 2011 8:48 am

Work in the dac?

Ali Tait · Post by **Ali Tait** » Wed Sep 14, 2011 9:13 am

In stereo?

Post by **Nick** » Wed Sep 14, 2011 10:30 am

Yes, heater current a bit higher, but we tried when the DAC was at Andrews.

Ali Tait · Post by **Ali Tait** » Wed Sep 14, 2011 10:51 am

Any impressions as to sound?

JackOfAll · Post by **JackOfAll** » Wed Sep 14, 2011 11:35 am

deleted

JackOfAll · Post by **JackOfAll** » Thu Sep 15, 2011 2:14 pm

deleted

JackOfAll · Post by **JackOfAll** » Thu Sep 15, 2011 4:04 pm

deleted

Post by **Nick** » Thu Sep 15, 2011 4:28 pm

I just read the spec sheet that gave the figure to ambiant as 80C/W, that puts them at 80*75 + 25 = 85C. should be fine, but hotter than I would prefer, YMMV. At 1W them will be at 105W, again, should be still ok as max temp is 150C, But things in semiconductor land migrate at a rate depending on temperature.

pre65 · Post by **pre65** » Thu Sep 15, 2011 4:37 pm

On the 10m45s I screw the chip to (usually) the amp case and attach the set resistor and gridstopper resistor to the legs.

JackOfAll · Post by **JackOfAll** » Thu Sep 15, 2011 4:49 pm

deleted

JackOfAll · Post by **JackOfAll** » Thu Sep 15, 2011 4:51 pm

deleted

pre65 · Post by **pre65** » Thu Sep 15, 2011 5:03 pm

JackOfAll wrote:
pre65 wrote:On the 10m45s I screw the chip to (usually) the amp case and attach the set resistor and gridstopper resistor to the legs.
Insulated from the chassis, hopefully!

Oh yes indeedy.

I did a bulk buy for the forum some age ago, when Mouser (or the other USA supplier, forget the name) were still supplying them to the UK.

JackOfAll · Post by **JackOfAll** » Thu Sep 15, 2011 5:16 pm

deleted

audio-talk

Bijou Headphone Amplifier build

#31

#32

#33

#34

#35

#36

#37

#38

#39

#40

#41

#42

#43

#44

#45