pinout help needed

[pinkjimiphoton]

hi guys,
gonna vero up an old-style EH frequency analyzer. went to tagboard, ordered the couple parts i didn't have, but the guy sent me ua796hc chips instead of the 1496h chip... supposed to be the same part,
but i can't find the dang pinout for it anywhere. its one of them old style chips in a metal can, and i don't know what the hell i'm doing...

is the little tag pointing at pin 1? pin 8?

little help would be VERY appreciated!

thanks!

[Scruffie]

I'll stop ya right there, that schematic of the Frequency Analyzer isn't really a clone, not sure where it came from and IIRC it doesn't work right as drawn anyway.

Old versions used the AD533 or... can't remember the name of the chip but a similar unobtanium part, better off building the AD633 reissue.

[PRR]

https://www.radiomods.co.nz/integratedcircuits/mc1496.html

[GGBB]

Your in luck - same pinout as 1496 - but for both the tin can has less pins than the dip14 - tag points to pin 10 which is pin 14 on the dip: https://4donline.ihs.com/images/VipMasterIC/IC/FAIR/FAIRS33495/FAIRS33495-1.pdf

[pinkjimiphoton]

thanks guys,
i've already begun the return process on these chips, and ordered some DIP 14 pin ones.
these were 10 pin in a TO-5 case.
the one on tagboard is what i'm gonna build i guess, as its supposedly verified.
just gotta wait another week to get them in. no big deal.

so the schematic is wrong? hoo boy, fun times affoot then

[Scruffie]

thanks guys,
i've already begun the return process on these chips, and ordered some DIP 14 pin ones.
these were 10 pin in a TO-5 case.
the one on tagboard is what i'm gonna build i guess, as its supposedly verified.
just gotta wait another week to get them in. no big deal.

so the schematic is wrong? hoo boy, fun times affoot then

When I say wrong, it's a completely different design by someone decidedly not EHX, the 1496 can work for ring modulators but isn't a designated multiplier chip and for guitar purposes I don't know of anyone who's had much luck with it.

Here's the schematic of what you're building from

And here's the actual EHX design

[pinkjimiphoton]

thanks scruffie!!

do ya think what i have now would work? or should i order yet MORE parts?

50 bux on ebay for the proper chip? lol
https://www.ebay.com/itm/AD533JH-Integrated-Circuit-CASE-TO100-MAKE-Analog-Devices/173446043918?epid=1830259540&hash=item286230990e:g:n0AAAOSwzf9bYuJh:rk:1:pf:1

ass rape AND highway robbery!

looks like the same pinout in them both, maybe i should just keep what i have and try it instead?

[Scruffie]

I did a little digging as I was going off memory about that design reportedly not working, the problem was the pin out on it is incorrect... if you're using the DIP-14 version, the pin connections make sense with the chip you got by mistake

Apart from adapting it to the 1496 they've changed some values too, the original 39k/3k3 divider for the dry signal is now just 3k3/3k3, so I suspect the wet dry balance will be... a little off. The filter values are a bit different too.

It might work as a design with some tweaking but the usual complaint with the 1496 is being unable to trim out all the carrier bleed.

[Scruffie]

thanks scruffie!!

do ya think what i have now would work? or should i order yet MORE parts?

50 bux on ebay for the proper chip? lol
https://www.ebay.com/itm/AD533JH-Integrated-Circuit-CASE-TO100-MAKE-Analog-Devices/173446043918?epid=1830259540&hash=item286230990e:g:n0AAAOSwzf9bYuJh:rk:1:pf:1

ass rape AND highway robbery!

looks like the same pinout in them both, maybe i should just keep what i have and try it instead?

Proper multiplier chips are very expensive even new and that one is long obsolete so the price isn't surprising.

Why not build the AD633 reissue? They can be picked up for about $10 and it's known to work.

[pinkjimiphoton]

i think i will, thanks for the guidance scruff... can get 'em on ebay in an 8 pin DIP for about 5 bux.

i was just curious if the ones i have already would work, seems like a PIA i don't wanna deal with, so i guess i'm shopping in china today

just ordered 4 of 'em, we'll see what happens.

[Rob Strand]

can get 'em on ebay in an 8 pin DIP for about 5 bux.

I can't find the pin outs for the 8-pin DIP.   Is it real?  From what I can see uA796  ~ SG1596  but there's no 8 pinners.  Do you mean the AD633's?

[pinkjimiphoton]

yeah rob, ad 633. i ordered 4 of 'em from whichever vendor guaranteed they'd be here quicker, lol... like, under 2 bux a piece. i was hoping the one i have here could be adapted. right now i have too much on my plate to breadboard it, was hoping to do a Q&D one for a friend that keeps bugging me.