[sdiy] 80017A VCF/VCA chip

[andy]

	Hi roman,

	here's the pinout I have for the 80017A/800170 chips:

	pin 1 is the one all off by itself, the rest follow sequentially:

	1. VCF IN (audio)
	2. RESO CONTROL
	3. VCF OUT (audio)
	4. +15v
	5. -15v
	6. VCF CONTROL
	7. GND 1 (this is the VCF gnd)
	8. GND 2 (this is the VCA gnd)
	9. VCA IN (audio)
	10. VCA OUT (audio)
	11. VCA CONTROL


	Inside the epoxied package is an IR3109 chip and two BA662 chips.
The first 662 is hooked to the "RESO CONTROL" input, and controls the
feedback loop around the IR3109. The second 662 is not linked to the VCF
at all, and is used as a VCA.

	andy

On Sun, 25 May 2003, Roman Sowa wrote:

> Hi everyone,
> I'm repairing Juno 106 and one of those damn 80017A hybrid VCF/VCA things
> has gone to hybrid heaven and I need a replacement or some info about it
> like internal guts schematic.
> I found one to buy, but for a stupid price of 140$. That's probably more than
> the owner gave for whole juno.
> So if anyone has any slight fragment of idea what might be inside of those
> bars, please let me know.
> I consider making another VCF as a replacement, but it may sound different..
>
> any help appreciated
> even like "buy another juno for parts, and sell other 5 hybrids on ebay for 100$
> each"
>
> Roman
>