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Old 14th April 2010, 01:22 PM   #471
Pano is offline Pano  United States
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Old 1st June 2010, 02:48 PM   #472
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Default hello

I deleted your post

English please

tinitus
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Old 19th February 2011, 04:06 AM   #473
wlewis is offline wlewis  United States
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Hi.. thanks for the schem. Can you upload a pic of your psu?

thanks
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Old 19th February 2011, 04:56 AM   #474
wlewis is offline wlewis  United States
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[QUOTE=Dxvideo;1299643]Hi all,

I made a LM4702 amp with renesans MOSFETs three months ago. And listening it for three months. This is the schematic I use;
QUOTE]

can you upload the schem of your psu?
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Old 8th April 2011, 12:30 AM   #475
wlewis is offline wlewis  United States
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Regarding post #446

Hey Dxvideo.. theres an error on your schematic. On your schem SJ162 is upside down.

You have Vee (negative voltage) going straight into the source of the mosfet.. as opposed to the drain.
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Old 30th April 2011, 09:12 AM   #476
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Quote:
Originally Posted by wlewis View Post
Regarding post #446

Hey Dxvideo.. theres an error on your schematic. On your schem SJ162 is upside down.

You have Vee (negative voltage) going straight into the source of the mosfet.. as opposed to the drain.
Hello

My hand s of the IC are the following.

3 pieces LM4702CTA
5 pieces LME49810BTA
5 pieces LME49811BTA

In addition, these transistors are also 5 other units.

MJL21193G
MJL21194G
NJW1302G
NJW3281G
NJW21193G
NJW21194G
NJL0281DG
NJL0302DG
NJL4302DG
NJL4281DG
MJL4281AG
MJL4302AG
MJE15030G
MJE15031G
MJE15032G

Especially liked and has been applied to the circuit drawings made ​​with LM4702CTA Can you share?
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Old 11th February 2012, 09:22 PM   #477
redjr is offline redjr  United States
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Hi all,

Good thread about the LM4702. Still working through the pages. Curious if anyone has used this pre-assembled module for a DIY audio-quality grade amplifier though. I'm looking to build an amp based on this module and was wondering what success anyone has had with this guy. Pictures would be nice too.

Also, what PSU have you used with this module? Thots?
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Old 12th February 2012, 05:54 AM   #478
hyperma is offline hyperma  China
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I remember that National semi has issued newer version of LM4702,they are LM49830 and LM49811.The 830 designed to drive MOSFETs out up to 500 watts,and the 811 designed to drive Bipolar.
Unlike some well known componets as OPA1612,LM4562....,the LM498xx and LM4702 was designed for extreme circuit,but I didn't find any Hi-End "Big block" amplifiers put them in.It's weird.
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Old 12th February 2012, 07:33 PM   #479
redjr is offline redjr  United States
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Quote:
Originally Posted by hyperma View Post
...Unlike some well known componets as OPA1612,LM4562....,the LM498xx and LM4702 was designed for extreme circuit,but I didn't find any Hi-End "Big block" amplifiers put them in.It's weird.
So, you're saying that they have an industrial quality to them - perhaps more than is needed for a typical home audio amp DIY setup? If I were to go with one of these modules, should I use a toroid, or R-core xformer? What secondary voltage should I be looking at for maximum output and to get +-60v rails?

Looking for comments from anyone that has built an amp around this particular module and what xformer and PSU board you may have used. Thx.
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Old 30th October 2012, 03:11 PM   #480
rambojj is offline rambojj  Germany
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Has anyone done a comparison 4702 vs 3875?
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