OpAmps and specs vs preference

**UV101** · 13-05-2010, 21:44

just ordered samples on TI OPA1641 (single) and 1642 (dual).

They are are new "sound PLUS" hi performance JFET offerings. They are literally just out and are on back order due end of the month for the duals and July for the singles. I'm looking forward to giving them a try as I think they may be pretty good.

I'm hoping they are detailed but not so forward as the LME479xxHA I guess I'll have to wait and see!!

**Peter Galbavy** · 14-05-2010, 08:05

Other thing is that on TIs website (Farnell's link to the 2132 datasheet is wrong so I had to go looking) they suggest the 2134 for audio applications. I have added a couple of those to my basket along with a pair of AD828s (again, simply based on researching IC makers own "alternative products" links). I will add a few more random pairs of opamps to build another £20 minimum while I prepare my brain for understanding the most basic electronics.

Still not had a chance to even listen to music with the out-of-the-box opamps and build a sample playlist. This is now looking like a next-weekend-at-the-earliest project

Oh, just saw UV101's post - the 1642's I saw but they are only offered as SOIC packages. I am not equiped for soldering and the like - anyone up for producing SOIC-to-DIP adaptors that don't require solder ?

And Farnell have US stock of the duals now - but for a premium http://uk.farnell.com/jsp/search/pro...52&Ntt=opa1642

**StanleyB** · 14-05-2010, 08:13

Originally Posted by Peter Galbavy

I will add a few more random pairs of opamps to build another £20 minimum while I prepare my brain for understanding the most basic electronics.

Have you considered a group buy on the AD826? The 10 piece break price is about half of the one off price. I am willing to take 4 or even 6 pieces of the AD826 if you do a group buy. I'll or course add the postal cost to the repayment.

**Peter Galbavy** · 14-05-2010, 08:33

Happy to buy more. You're right of course, it's £5.65 each of £2.61 if you buy 10.

I already have a pair, but happy to buy 10 more to get the £20 min charge thing - I am not great at posting stuff to others, but I will drop you 6 or so 'round one evening next week - and I might take a speaker swicth off you too

Anyone else want anything ? Note, me posting stuff out - as above - may be a lazy process. Sorry.

**StanleyB** · 14-05-2010, 08:49

Originally Posted by Peter Galbavy

I will drop you 6 or so 'round one evening next week - and I might take a speaker swicth off you too

.

I'll be more than happy with that

.

**sponge** · 14-05-2010, 08:59

Peter, Take a look at:

http://cimarrontechnology.com/pre-mo...omponents.aspx

They have some of the more exotic opamps (single and double SOIC) pre-mounted on adapters. Some are not exactly cheap, but I think they offer good value. I have used them several times and found them very quick and reliable.

Ken

**UV101** · 14-05-2010, 11:42

you can get those empty browndog adapters here in the uk! :-)

**sponge** · 15-05-2010, 08:10

Originally Posted by UV101

you can get those empty browndog adapters here in the uk! :-)

Yeah, but he said he was not equipped for soldering...

BTW, who sells Browndog adapters in the UK?

Ken

**UV101** · 15-05-2010, 11:24

Hi ken,

audioupgrades.co.uk stock them but I have also previously ordred from the states without issue.

Ian

**Mr. C** · 15-05-2010, 15:13

Perhaps Leo could adapt an Twisted Pair I/V stage or deisgn a fully discret unit to use instead of omp amps, the difference is worth the effort.
I have not used op-amps in any of our designs for close to 4 years now.
Though space I feel in this case may be an issue anyway good luck.

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