http://www.soundlabsgroup.com.au/c/ICs/ICs.html
$50 for the chip. You mighe be able to source for less but unlikley for single units
http://www.soundlabsgroup.com.au/c/I...+Adapters.html
say $10 for the adapter
= $60.00
I paid a lot less than that from an ebay store Soundlabs are too expensive.
I might be stupid but I am not that stupid
You have inadvertantly not included your time into your equation, initial time to R&D and time to design and manfacture/build/populate a pcb. unless of course you ripped the design out of a magazine along with the pcb, then you must include the cost of the magazine .
As for my design? , its a class discrete design of common topology and there are numerous variations
I use a dual Jfet $7.00 each, a few transisters and resisters and a 2.5 cn square pcb ...say $12.00 all up for a discrete opamp
I use transistors and resistors, I'm not familiar with transisters and resisters .... are they something new? ..... now does your thing have the same open loop gain characteristics as an OPA627, is it as stable as an OPA627, can it drive a load like an OPA627, what is it's Common Mode performance like please, what's its slew rate and do you have a noise figure for it.
You can good up the RC values on vero board or as I do make a printed pcb..its not that hard to do so.
On replacing parts on a existing board unless you have the right tools its not to be encouraged..burnt and lifted pcb tracks are not particularly reliable.
So who burnt their tracks and lifted their tracks :dont-know..... Now are you discouraging any type of modification here, to anything ..... by anybody on a DIY forum .... unless sanctiond by yourself, I have only been doing this for let me see .... um .... 38 years and 34 of them professionally ...... like for a living you know, ...... I may have not reached your standard of vero board but please forgive me if I design a pcb for everything I do.
You need to be mindful of the rules, name calling and F words are not allowed
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Yes .... maybe I should have not called you lazy, as you keep replying to my posts you can't be quite that lazy.
There are numerous people on the forums usig Pass equipment
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And there are probably more people not using Pass equipment than people that are.
In case you are not aware, most chip opamps and only bias with faction of a mA, a discrete opamp can up 7-10 mA of bias and therefore will always work in class A. The PS in the 5235 is unlikely to handle that current of say a dozen opamps collectively.
I think what you mean is chip amps input bias current might be in the order of pico Amps but don't forget their total supply current is in the order of typically 15 milli Amps or so, so without doing the math I still reckon the 5235 ps will handle it .... but hey ... if not, I gues I could increase the size of the transformer to cover it .... mod number 2 !!!