[Elecraft] Batteries for K1

[David Quental]

Hi all,

tks for all your answers to my question.

I have bought today a 7AH-12 battery. It is small and weight is not so 
bad. Maybe next weekend I will use it with my K1.

Again, tks for all your answers and best 73.

CT1DRB
David Quental

> David wrote:
>
>> My K1 has a KBT1 an Internal battery Adapter and I have 4
>> rechargeable batteries at my own. What could be better, buy more
>> rechargeable batteries or a small battery, however bigger than AA
>> batteries, to operate with ?
> I have a ten-year-old K1.  I used the KBT1 for about 18 months and
> then removed it.  I don't like potential chemical corrosion sources
> (batteries) inside my K1, the KBT1 micro-speaker is far inferior to
> the standard K1 speaker, and the K1 just looks so much better with
> the standard top cover and speaker.
>
> For short-time operation, I use an external 10-cell (arranged 5x2)
> AA-cell holder with a six-inch cable going to the K1.  I use NiMH
> cells.  But for most situations where the additional weight isn't
> objectionable, I use a small 4- to 5-Ah 12-volt sealed-lead-acid
> (SLA) battery.  One charge lasts for a long operating interval.
> SLA batteries are available in smaller size and capacity, but I've
> been happiest with what I described.  I always use rechargeable
> batteries of some sort.
>
> My K1 (with LCD backlight, KNB1, KAT1, KFL1-4) on 10.12 MHz
> using a 12-volt DC supply consumes:
>
> On RECEIVE
> Low AF Out        60 mA
> High AF Out      120 mA
>
> On TRANSMIT
> 0.1 Watt (min)   280 mA
> 1.0 Watt         450 mA
> 2.0 Watt         550 mA
> 3.0 Watt         650 mA
> 4.0 Watt         750 mA
> 5.0 Watt         850 mA
> 7.0 Watt (max)  1200 mA
>
> The best efficiency seems to be around the 5 Watt output setting.
> It is apparent that AA-cell capacity can be depleted fairly quickly.
> It pays to have adequate battery capacity.  That's why I like the
> 5-Ah SLA battery.
>
> 73,
> Mike / KK5F
> K1 S/N 175
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