Err, did you mean 3 amp instead of 3 watt? 1 amp at 12v = 12 watts,
of course. I have found the MFJ-4103 (2.89 A) to be a suitable
supply for my K2 (except that the output isn't quite high enough to
maintain battery charge with the KBT2 installed) and it should be a
good choice for the K1 also. It's a quiet lightweight switcher which
will work on both 120 and 240 volt systems.
73 - Bob, N7XY
On Mar 18, 2007, at 10:46 PM, Don Wilhelm wrote:
> Al,
>
> Check the Specifications section of the manual. You should find
> that the current draw at 5 watts is less than 1 Amp. If your K1
> has options, that current draw may increase a bit, but in any case,
> a 3 watt power source should be more than adequate - actually a 1
> amp supply may suffice, but if you are investing in a power supply
> consider allowing some reserve, hence my recommendation for a 3
> watt or greater supply. Resist the temptation to use a wall wart
> supply - the voltages on some of the 12 volt wall warts can be as
> high as 17 volts - use a regulated supply rated at 12 to 13.8 volts.
>
> 73,
> Don W3FPR
>
> Al & Dianne Bruce wrote:
>> I am curious abt a power supply for the K1. The instruction book
>> calls for a 12-14V unit. How careful do I need to be abt the
>> amperage?
>> Al
>
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