[Lowfer] need a circuit for DC to DC Boost converter

[Ralph W5JGV]

> I have an 18 Volt DC supply. I want to convert the voltage to
> 36 Volts DC to power my lowFER PA. Will anyone point me to a
> circuit to do this ?? I suppose minimal parts count, low ripple,
> 500 mAmp power handling.


Since you don't need a lot of current, here are a couple of ideas:

1) Find another 18 volt power supply and connect the two supplies in series.

2) Scrounge through the local thrift stores for some used inkjet printer
power supplies.  I have found several switching power supplies rated at
30-40 volts DC @ 300-700 mA at my local thrift store.  The HP inkjet
printers commonly use power supplies in that range.

Since all of the wall-wart and brick-style switching power supplies have
isolated outputs, you can easily connect them in series.

Good luck!

73,

Ralph  W5JGV - WD2XSH/7