LME49810, LME49830 or LM4702? BiPolar or Mosfet output? - Page 2 - diyAudio
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Old 28th February 2009, 08:45 AM   #11
oj is offline oj  United States
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I purchased the model K-49810-A from chip-pcb and it is top notch.
I used tightly matched 2SC5200 and 2SA1943 as outputs.
Very, very satisfied!
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Old 28th February 2009, 11:38 AM   #12
sendler is offline sendler  United States
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Default Which lateral mosfets

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Originally posted by fab

use Lateral mosfets instead of the provided IRFP240/9240.
.
So which mosfets do you like right now?
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Old 28th February 2009, 12:12 PM   #13
sendler is offline sendler  United States
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Default 6 device monster!

Quote:
Originally posted by oj
I purchased the model K-49810-A from chip-pcb and it is top notch.
I used tightly matched 2SC5200 and 2SA1943 as outputs.
Very, very satisfied!
Wow! That amp is a monster with it's 6 output devices. I see that only the boards are available right now. I am a DCX2496 active cross user and could never feed 6 (or 12 bridged) of those. That would keep me warm in the winter. Of the amps I have, I do tend toward BJT though I haven't tried the newer lateral mosfets.
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Old 28th February 2009, 12:28 PM   #14
oj is offline oj  United States
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Scott,
I share your concerns, but take into account that if you will bias the output BJTs at the suggested current (100mA), you will hand up to dissipate about 30W/amplifier at steady state... about 200W for 6 amplifiers.
not too bad after all...
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Old 2nd March 2009, 03:39 PM   #15
sendler is offline sendler  United States
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Default Still no email

Still no email reply. It's been a week. Too bad. Looked like a good deal. If they had any modules that sounded better than my TDA7250 amps, I would have purchased 12 at a time.
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Old 3rd March 2009, 10:47 PM   #16
fab is offline fab  Canada
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I also have no reply anymore. I think something is wrong and I would wait before ordering and pay...
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Old 4th March 2009, 09:02 AM   #17
AndrewT is offline AndrewT  Scotland
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got my Email reply today. 4 working days does not seem too long.

But the P 9810 does not include the driver chip and it's out of stock till ~Mid March.
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Old 4th March 2009, 11:11 AM   #18
sendler is offline sendler  United States
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Default Digikey has 270 LME49810TB chips

Quote:
Originally posted by AndrewT
got my Email reply today. 4 working days does not seem too long.

But the P 9810 does not include the driver chip and it's out of stock till ~Mid March.
.
I still haven't gotten a reply to my emails.
.
Digikey has 270 of the LME49810TB chips in stock for anyone in the US. $7.33 each.
.
Does he say which module/ output device type he thinks sounds the best? BJT or mosfet. I'm sure he has listened to M-9810-C+ and M-9830-B side by side.
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Old 4th March 2009, 05:36 PM   #19
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i bought lme49810 cheaper from here.
http://www.semielectric.com/servlet/...eo-HiFi/Detail
Ihave bought some pcbs prom Chip-Pcb a few months ago. Though he did not answered to inquiry mails - He definitely seems very busy - he sent the stuf as soon as as ordered. His pcbs show a very qood quality and work fine. I just had to make one cut to separate input ground from decoupling/dirty ground. Any needed information can be found on his website.
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Old 4th March 2009, 06:51 PM   #20
sendler is offline sendler  United States
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Default Output devices?

Quote:
Originally posted by bobodioulasso
i bought lme49810 cheaper from here.
http://www.semielectric.com/servlet/...eo-HiFi/Detail
Ihave bought some pcbs prom Chip-Pcb a few months ago. Though he did not answered to inquiry mails
.
Which output devices did you use?
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