singleended58
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I have a Leckerton portable amp and just got a pair of AD8620s which are installed today but there is no sound. What did I do wrong? Help please. Thanks.
What were the stock opamps (Leckerton what model?). You didn't try to replace a single opamp with a dual (ala AD8620) did you? That could be one big reason it doesn't work...I have a Leckerton portable amp and just got a pair of AD8620s which are installed today but there is no sound. What did I do wrong? Help please. Thanks.
What sounds good is such a subjective thing. One of my favorite and most used op amps is the jrc4558 in the to-5 metal package. Something about this chip just hits all the right spots.
I guess that is reasonable for a necro-thread.Sorry that I got into an 14 years old thread
I actually tried to look for a comparison between the opamp AD8620 and 627/637 for the Leckerton UHA-6S Mk2.
I guess that is reasonable for a necro-thread.
You did use the dual to single adapter for the AD8620 didn't you? It is a dual opamp and the amp appears to be setup for a single? Dual and single don't have the same pinout.
The AD8610 is the single version of this opamp.
Yes, I would be concerned with anything semiconductor-related on Aliexpress being genuine...Hey there,
I just wanted to find out about the general sentiments about purchasing opamp off Aliexpress. My old opamp broke and I wanted to purchase several new opamps off several retailers on Aliexpress. However, these opamps doesn't seem like it's manufactured by Texas Instruments, it looks like generic versions of what TI are producing. Should I be concerned? Are there any audible differences or is the difference just like branded and generic medicine - the same?
Thanks for looking!
If you are located in USA Mouser Electronics have them originally from TI.
Yes, I would be concerned with anything semiconductor-related on Aliexpress being genuine...
What exactly are you working on? Opamps normally don't just fail or break in my experience.
Regarding the last portion of your original post, most opamps are single-sourced; i.e., and AD825 is made by Analog Devices and only Analog Devices. The AD825 is only available in surface mount packaging (SOIC-8 or SOIC-16), so you would need an adapter such as those by BrownDog. There are a number of these pre-mounted on an SOIC to DIP-8 adapter on ebay. Guaranteed genuine? Probably not. However I don't think the AD825 is a particularly sought out opamp, so counterfeiting these would not have as much upside (to the counterfeiter) as something like an OPA627 or 637, which generally sells for much more.
Some older opamps such as the NE5532 or NE5534 have been licensed to other manufacturers. I don't even remember who the original manufacturer was on these. Signetics? Philips? On Mouser I show TI and ON Semi.
As for search keywords, through-hole or DIP will be about it for something in that form factor, though I should note that the OPA627 and 637 are available in a round metal can (TO99) which though being through-hole, would not easily work for your application, so a DIP-8 (PDIP-8) will be what you are looking for.