[Elecraft] Re: AA primary cells: NiMH vs. Alkaline

Wed Jun 19 17:13:01 2002

If someone does do this test, I would be interested in the results using 
both 8 x AA and 10 x AA cells.

Steve
aa8af

Wayne Burdick <[email protected]>
Sent by: [email protected]
06/19/2002 02:25 PM

        To:     "Wallace, Andy" <[email protected]>
        cc:     [email protected]
        Subject:        [Elecraft] Re: AA primary cells: NiMH vs. Alkaline

"Wallace, Andy" wrote:

> It would be great if someone could put some charged NiMH cells in
> their K1, set it to 5W, and auto-repeat CQ into a dummy load and
> tell us how long it lasts. Set the length of CQ and repeat delay to
> simulate ragchewing or a contest. That info would look great on the
> KBT1 info sheet, too!

This has already been done, I believe, but I don't have the results at
hand. If you do such a test, be sure to monitor the battery voltage and
the transmitted signal. The rig will keep putting out power for a while
even after the batteries go below the minimum threshold for the 8V 
regulator.

Note that we recommend using 3-4 watts when running from internal
battery, because best PA collector efficiency at 9 to 10 volts occurs at
a lower power level than at 12-14 V.

73,
Wayne