[Elecraft] Re: K2/100: Three ways to switch from QRO to QRP

[Wayne Burdick]

Charles Greene wrote:

> When using the
> QRO amp and mains but with an [external] gel cel connected to the QRP amp power
> connector, will the gel cel be on a float charge?  

No, because the K2's DC power jack includes a reverse-polarity
protection diode. So if you want to keep a battery connected to this
jack, you'll need to arrange for external charging. I mentioned a solar
panel, which is one way to float charge it. You could also float-charge
it by connecting it to the QRO power supply and adjusting this supply's
voltage accordingly. But probably the best alternative would be to build
a true external charge controller for your battery type. Suitable
circuits have been published in QST and elsewhere.


> Will it be on float
> charge when the K2 power switch is OFF but the ""QRO power supply is on
> like the internal battery?

Only if you have wired the QRO supply to the battery for float-charge
purposes (see above).


> When can I order one?

Spring, 2002. Details later.

73,
Wayne
N6KR