Picture below courtesy of Russ.
There are 4 chips in the bottom left quarter of the card. The bottom 2 of the 4 are CMOS chips but does anyone on the forum know the ID of the top 2?
It's part of the PLL and i'm wondering if there is a PLL chip in there or all 4 chips are part of an early flip flop style PLL?
An interesting observation is the resistor between the yellow primary and the red inductor. If this is in series with the inductors and the cell then during mode 1 @ 5Khz is it acting like a shunt to get current circulating through the water and load the inductors?
The diode at the top is interesting, definately not a 1198 and his switching transistor is an RCA3055, going to download the PDF for that and study its harmonic distortion.
Really need those 2 chip codes if anyone has any ideas?

Quote from nav on November 24th, 2015, 03:29 AM

Picture below courtesy of Russ.
There are 4 chips in the bottom left quarter of the card. The bottom 2 of the 4 are CMOS chips but does anyone on the forum know the ID of the top 2?
It's part of the PLL and i'm wondering if there is a PLL chip in there or all 4 chips are part of an early flip flop style PLL?
An interesting observation is the resistor between the yellow primary and the red inductor. If this is in series with the inductors and the cell then during mode 1 @ 5Khz is it acting like a shunt to get current circulating through the water and load the inductors?
The diode at the top is interesting, definately not a 1198 and his switching transistor is an RCA3055, going to download the PDF for that and study its harmonic distortion.
Really need those 2 chip codes if anyone has any ideas?

nav,

the upper one is a cd4046B pll vco, the next beyond is a cd4001.
pic added will show that in detail.
hope that helps.
gpssonar should have actual circuit diagram he´s working on his replication. I also have a circuit diagram from 2010 because at that time I rebuilt that circuitry.

Thanks