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Main board Build help required
Posted: Sun Apr 30, 2017 7:04 pm
by g6crf
Hi all, I am in the middle of building the board and have got to the point of installing U03 and U04.
The ICs are shown in the layout as having a notch at the top, however when delivered the chips have no notch, just a sloped edge.
Can anyone tell me which way around these go?
Thanks
Terry
G6CRF/G0CRF/KW4NQ
Re: Main board Build help required
Posted: Sun Apr 30, 2017 7:14 pm
by g0uhy
Hi Terry,
take a look at the photo on the wiki. You should be able to tell from the writing on the chips.
https://wiki.batc.tv/File:2-3_Filter-Modulator2.jpg
Hope that helps?
73
Malcolm G0UHY
Re: Main board Build help required
Posted: Sun Apr 30, 2017 7:31 pm
by M0SKM
You can download the data sheet here.
http://www.linear.com/docs/3599
Steve
Re: Main board Build help required
Posted: Sun Apr 30, 2017 9:40 pm
by G4KLB
Like this.
- U03 U04.JPG (719.94 KiB) Viewed 4842 times
Re: Main board Build help required
Posted: Mon May 01, 2017 10:24 am
by gm1mfn
g6crf wrote:Hi all, I am in the middle of building the board and have got to the point of installing U03 and U04.
The ICs are shown in the layout as having a notch at the top, however when delivered the chips have no notch, just a sloped edge.
Can anyone tell me which way around these go?
Thanks
Terry
G6CRF/G0CRF/KW4NQ
Hold the chip with the sloping edge on your left and pin 1 is at the top-left corner. The sloping edge is on the same side as the impressed dot next to pin 1.
Re: Main board Build help required
Posted: Mon May 01, 2017 2:48 pm
by g6crf
Thanks for the replies, that's definitely solved it for me.
Looking forward to when I get it finished.
Thanks
Terry
