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General Category => Huh? => Topic started by: ChrisSmolinski on November 17, 2016, 1224 UTC

Title: jFarley, I found the ideal OpAmp for your next Loop Antenna Preamp
Post by: ChrisSmolinski on November 17, 2016, 1224 UTC
Full datasheet (4 pages): http://bsvi.ru/uploads/74a531c86fcb_EFE6/LM0901A1411090451C.pdf (http://bsvi.ru/uploads/74a531c86fcb_EFE6/LM0901A1411090451C.pdf)

(http://bsvi.ru/uploads/74a531c86fcb_EFE6/LM0901A1411090451C.pdf)
Title: Re: jFarley, I found the ideal OpAmp for your next Loop Antenna Preamp
Post by: Pigmeat on November 17, 2016, 2150 UTC
Quote from: ChrisSmolinski on November 17, 2016, 1224 UTC
Full datasheet (4 pages): http://bsvi.ru/uploads/74a531c86fcb_EFE6/LM0901A1411090451C.pdf (http://bsvi.ru/uploads/74a531c86fcb_EFE6/LM0901A1411090451C.pdf)

(http://bsvi.ru/uploads/74a531c86fcb_EFE6/LM0901A1411090451C.pdf)

I've got an altimeter from an old B-17 if you need one, Farley. No analog to digital input/output on the thing but a CalTech man like Al ought to be able to slap one together from a digital tire pressure gauge and a couple of finely crafted gum wrapper capacitors.
Title: Re: jFarley, I found the ideal OpAmp for your next Loop Antenna Preamp
Post by: jFarley on November 18, 2016, 1850 UTC
Knock knock....Is this thing on?  

Yeah, I guess so.

Thanks, Chris!  Joosta wot ima luke!  These will drop right into the next project, and has supplanted the datasheet for the National LH033 Fast and Damn Fast amps as my fave datasheet of all time.  I'm calling for samples today!

And Pigmeat, I appreciate the offer for the gum wrapper capacitors.  But I have purchased some NOS Hi-Q Russian reflux capacitors (Putin Signature Series) which will be used to resonate each element in a 4 element Backfire Array.  Because I will be using reflux capacitors, I will be able to resonate the loops in both the Frequency AND Time domains, which will of course allow me to hear beacons and other things which have been decommissioned years ago.  It looks good on paper, anyway.
Title: Re: jFarley, I found the ideal OpAmp for your next Loop Antenna Preamp
Post by: ChrisSmolinski on November 18, 2016, 1906 UTC
Quote from: jFarley on November 18, 2016, 1850 UTC
And Pigmeat, I appreciate the offer for the gum wrapper capacitors.  But I have purchased some NOS Hi-Q Russian reflux capacitors (Putin Signature Series) which will be used to resonate each element in a 4 element Backfire Array.  Because I will be using reflux capacitors, I will be able to resonate the loops in both the Frequency AND Time domains, which will of course allow me to hear beacons and other things which have been decommissioned years ago.  It looks good on paper, anyway.

But will it pick up WABC inside the Mt. Kisco A&P supermarket?
Title: Re: jFarley, I found the ideal OpAmp for your next Loop Antenna Preamp
Post by: Pigmeat on November 18, 2016, 2354 UTC
Quote from: ChrisSmolinski on November 18, 2016, 1906 UTC
Quote from: jFarley on November 18, 2016, 1850 UTC
And Pigmeat, I appreciate the offer for the gum wrapper capacitors.  But I have purchased some NOS Hi-Q Russian reflux capacitors (Putin Signature Series) which will be used to resonate each element in a 4 element Backfire Array.  Because I will be using reflux capacitors, I will be able to resonate the loops in both the Frequency AND Time domains, which will of course allow me to hear beacons and other things which have been decommissioned years ago.  It looks good on paper, anyway.

But will it pick up WABC inside the Mt. Kisco A&P supermarket?

That is the true test of any RF device. Speaking of the A&P, did you know lids from cans of Pringles Potato Chips can be used as makeshift knobs for your SDR's so the other dx'er's strolling the aisles won't make fun of you?
Title: Re: jFarley, I found the ideal OpAmp for your next Loop Antenna Preamp
Post by: Josh on November 20, 2016, 1923 UTC
The max pd chart is quite telling.