Let's start from square one...

[Tinkerer]

Power supply

Tinkerer,
I don't think the inverter pump will supply the current you need to drive the TX. The HFE (~50) of the pump transistors is too low.

You might want to try driving the in a darlington-like configuration (effective HFE ~10,000) like this:

KingJL
Thanks for the help.
With the Darlingtons there will definitely be enough power. It has been mentioned that the linear regulators are old fashioned and have low efficiency.
The modern switching supplies are much more efficient, but what worries me is the noise factor.
How does the noise of the capacitor charge pump compare with the noise of a switcher regulator?

Tinkerer

[KingJL]

Tinkerer,
I don't think the inverter pump will supply the current you need to drive the TX. The HFE (~50) of the pump transistors is too low.

You might want to try driving the in a darlington-like configuration (effective HFE ~10,000) like this:

[Tinkerer]

Power Supply

Here is another power supply. I want to use the higher voltage V+ to drive the coil from -12V to V+.
Since I am using an IB coil, the RX coil can be on GND to +5V.
5V-VDD to drive the PIC
Will this work?
Any suggestions to improve the circuit would be welcome.

Tinkerer

[gwzd]

You left pin 2 of U2:A floating. The 78/79 series of LR are getting old, have you consider using a little bit more efficient regulators? Put some small caps in parallel with the polar capacitors, say 47~100nF would do fine. Large capacitors like those you have chosen are no match for fast transients and spikes, a ceramic cap in parallel can give you cleaner power. A precaution though, when using aluminum electrolytic capacitors together with ceramic ones you have to test the combination. Sometimes that magical duo can cause more problems than it solves, and only testing the brands you are going to use can give you a clue on whether to use them or not.
A final thought, have you consider not using intersections of more than three wires? I know that nowadays is difficult to miss the dot, but still it happens sometimes. I you don't use crossing wires then the problem goes away all by its own. I'm not that young anymore, but when I started drawing schematics that was a big "no-no". I think even Winfield Hill preaches about that.
Regards,

[GT Blocker]

Hey all,

OK...I'll play (even though I am probably the least qualified ).

How about starting with that PWR supply? Here's my virtual ground version....



Thoughts?