Batteries for K1

[Mike Morrow-3]

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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[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
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[kk5na]

I have a K1 S/N 741 for sale   It has the 4 band board installed, and
the original 2-band board with it.  It also
has a case with the foam cut out for it to ride in,  Also included are a
homemade version of the MP-1 multi-band antenna with some counterpoise
wires and weights for them.  Also included is the KTS1  Wide Range Tilt
Stand.

Also in the case is an MFJ HF Cross-Needle SWR/WATTMETER and a small
battery(I don't know if it can be recharged..and I may not be able to
ship it),

I will sell it with all for $475.00 plus shipping...or just the K1 with
extra board for $420.00 plus shipping.

Here is a link to some pictures if you are interested.  ....
http://kk5na.com/K1/

The radio receives well and has power out on each band.

Joe KK5NA
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