What is this? Techs help id it

[k9fon12374]

I found this in a parts box and I've had it for years. Iirc, it came out of a desk mic like a d 104 or what have ya.

 

[Cable Guy]

Looks like a homemade amplifier, maybe to replace the amp board in a d104. That IC is a transistor array with 5 transistors inside it, that is all. That's my best quick guess.

 

[sunbulls]

The 3086N is also known as the CA3086. By comparison, the CA3045 internal transistor connections are identical. The CA3045 was used in the original “Tweety Bird” noise toy. I’m betting on this chip was used as such…

 

[AudioShockwav]

https://siliconsupplies.com/parametric-product-detail/NPN_Transistor_Array/LM3086/_c-8~s-29

You guys beat me to it.

73
Jeff

 

[Eldorado828]

 

[midnight special]

yep looks just like mine dead bug style in my old cobra 29

 

[nomadradio]

Sure looks like a tweety bird to me.

https://www.worldwidedx.com/threads...tely-stupid-the-tweety-bird-noise-toy.270184/

73

 

[k9fon12374]

Hope these pics are better.

 

[k9fon12374]

Sm8412 is the id on the chip.

 

[k9fon12374]

The 3086N is also known as the CA3086. By comparison, the CA3045 internal transistor connections are identical. The CA3045 was used in the original “Tweety Bird” noise toy. I’m betting on this chip was used as such…
View attachment 77660

3086n is on the chip.

 

[TM86]

Sm8412 is the id on the chip.

I think that's the date code for when it was manufactured. Something like the 12th week of 1984.

 

[nomadradio]

Trust me, the type number really is LM3086. It was National Semiconductor's licensed copy of the RCA CA3086. The type number prefix "LM" on a Nat Semi linear chip was supposed to mean "Linear Module".

Or so I was told.

73

 

[VMC]

The prefix LM stands for linear monolithic

List of LM-series integrated circuits - Wikipedia

en.wikipedia.org

 

[k9fon12374]

Id like to figure out how to wire it up. I removed it from a radio or mic 28 years ago but I cut off the wires and never wrote nothing down.