GB for National Semi LME series Opamp, buffer and Chipamp - diyAudio
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Old 28th April 2010, 10:14 AM   #1
diyAudio Member
 
Join Date: Nov 2008
Default GB for National Semi LME series Opamp, buffer and Chipamp

I'm starting a GB for National Semi's excellent LME series of op-amp, buffer and chipamp.
The parts will be brought from NS authorised distributor in Singapore.

Although I also do for profit sales, this is a GB.
After all my cost, the price still has a tiny amount of margin, this is to cover any unexpected events.
If all goes well, I will keep that margin as minimum wage for my labour.

ITEM___________Min Qty__unit$__donation$
LME49710NA(DIP)___250___$1.35___$0.10
LME49713MA(SOIC)__140___$3.20___$0.20
LME49720NA(DIP)___170___$2.80___$0.20
LME49721MA(SOIC)__250___$2.20___$0.20
LME49722MA(SOIC)__250___$2.10___$0.20

LME49710HA(TO99)___40___$7.75___$0.50
LME49713HA(TO99)___25__$17.50___$1.00

LME49600TS_________75___$6.70___$0.50
LME49811TB________100___$4.70___$0.30
LME49830TB_________20___$6.80___$0.50

Min Qty is the quantity that must be meet for the GB to take place, I have already excluded the quantity that I myself want.
If interest level is too low, I will remove that item.

The above price includes donation (to diyaudio), paypal fee, local tax, and shipping fee due to additional weight.
Shipping fee $4 per order irregardless or order size, it's to cover starting weight postage and packaging.
Minimum $25/order before the $4 shipping, this is to reduce my workload.

Please put down your order at: https://spreadsheets.google.com/ccc?...BVThTTmc&hl=en
GB close on May 16, you may amend your order as you wish before that.
All payments must be received by May 23.
Lead time 10-14 weeks, so I should be shipping out to you in Late Aug to early Sep.
Shipment by Singapore Post registered airmail.
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Old 29th April 2010, 08:46 PM   #2
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No interest for the LME parts?
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Old 30th April 2010, 05:29 AM   #3
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Any possibility of getting the LME49860? I'd be interested in 10 units, but will settle for the LME49720 if the price difference is too high. Also, is the LM4702 still available from the disties? There's only limited supply on EBay.
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Old 30th April 2010, 06:51 PM   #4
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LME49860 should be obtainable at reasonable price.
The problem is that even for 49720 there don't seems to be much of an interest.
For LM4702 you might consider LME49811 instead, still class A driver, and according to some ex-NSC engineer is very good.
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Old 1st May 2010, 06:19 AM   #5
Luke is offline Luke  New Zealand
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Im interested, but it seems this ones not going to get off the ground.
Isnt the lme49720ha more versatile than the 49710? I would like both anyway.
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Last edited by Luke; 1st May 2010 at 06:25 AM.
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Old 1st May 2010, 04:25 PM   #6
parb is offline parb  United States
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Location: Asia and United States
Im interested in the LME49720 (dip package). I'm planning to do som work with designs for active filters so i'd sign up for 60 units. I can go more if you are short for minimum order, or i can substitute for another dip opamp of similar quality if there is more interest in a different choice. I'm local to you (i'm in singapore) so i can either pay in person or via paypal -your choice.

-Par
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Old 1st May 2010, 06:07 PM   #7
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I will give it a bit more time and finalize on a few opamps.
While I never expect all the items to reach GB quantity, I expect at least 49710 to go through, and maybe 713 and 720.
Even Nz/Oz guys can get a GB of 710 through, and this GB is global.

Parb:
You are certainly welcomed!
Please help me to fill up the form.

Luke:
720HA cost 2X of 710HA, while the Min qty is no smaller, that is why I only put 710HA in, in the hope of getting the HA version though the GB.
You can always use 2x 710 instead of 720, or use one 720 as a 710 (leave the 2nd opa out), so it is really hard to tell which one is more versatile.
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Old 1st May 2010, 09:51 PM   #8
Luke is offline Luke  New Zealand
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Location: Wellington NZ
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Quote:
Originally Posted by zhoufang View Post
I will give it a bit more time and finalize on a few opamps.
While I never expect all the items to reach GB quantity, I expect at least 49710 to go through, and maybe 713 and 720.
Even Nz/Oz guys can get a GB of 710 through, and this GB is global.

Parb:
You are certainly welcomed!
Please help me to fill up the form.

Luke:
720HA cost 2X of 710HA, while the Min qty is no smaller, that is why I only put 710HA in, in the hope of getting the HA version though the GB.
You can always use 2x 710 instead of 720, or use one 720 as a 710 (leave the 2nd opa out), so it is really hard to tell which one is more versatile.
thanks Zhoufang,

I can understand that, and I have a use for a single. One thing I would like to use these for is to upgrade my cd player opamps which are duals.
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If you give a man a fish he will eat for a day. But if you teach a man to fish he will buy an ugly hat. And if you talk about fish to a starving man then you are a consultant. Dilbert
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Old 1st May 2010, 11:59 PM   #9
sandyK is offline sandyK  Australia
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Join Date: Apr 2007
Location: Sydney
I recently used the LME49710HA in a Silicon Chip DAC at the output.
It sounded markedly better than the DIP8 LME49710 that I obtained not so long back in a Aus/NZ GB.(thanks Len !) The LME49720HA has also been found by many to be quite noticeably better than the DIP8 version.
I suspect that the relative lack of interest may be due to the fairly lengthy lead times ?
SandyK
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Old 3rd May 2010, 08:56 AM   #10
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Join Date: Dec 2004
Location: Melbourne, OZ
Hi Zhoufang,

Keep the GB open for at least a month so enough people see the thread. The GB I ran last year for LME49710NA worked out OK because I found a distributor with parts in stock. Right now, National Semi parts are typically 9-12 weeks lead time from most distributors.

Future Electronics are showing some stock of the Nat Semi LME opamps, have you tried them? Digikey have stock but seem to have put their prices up a few months ago. Avnet no stock at all.

Wish I was in Singapore - weather getting colder here, had to light the fire tonight!

-Len.

Quote:
Originally Posted by zhoufang View Post
I will give it a bit more time and finalize on a few opamps.
While I never expect all the items to reach GB quantity, I expect at least 49710 to go through, and maybe 713 and 720.
Even Nz/Oz guys can get a GB of 710 through, and this GB is global.
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