[Elecraft] K3 Power out

[chen dave]

I got following data with IFR AM/FM 1600:
K3 sn1302

POWER SET(W)     POWER OUT（W)     Difference     ERR(%)
0     0.15     0.15
0.1     0.15     0.05     50.00%
0.2     0.3     0.1     50.00%
0.3     0.31     0.01     3.33%
0.4     0.4     0     0.00%
0.5     0.51     0.01     2.00%
0.6     0.63     0.03     5.00%
0.7     0.69     -0.01     -1.43%
0.8     0.76     -0.04     -5.00%
0.9     0.83     -0.07     -7.78%
1     1     0     0.00%
2     2.1     0.1     5.00%
3     3.2     0.2     6.67%
4     4.2     0.2     5.00%
5     5     0     0.00%
6     5.8     -0.2     -3.33%
7     6.6     -0.4     -5.71%
8     7.7     -0.3     -3.75%
9     8.8     -0.2     -2.22%
10     9.7     -0.3     -3.00%
12     11.4     -0.6     -5.00%
14     15.8     1.8     12.86%
16     17.5     1.5     9.38%
18     19.7     1.7     9.44%
20     21.8     1.8     9.00%
22     24     2     9.09%
24     25.5     1.5     6.25%
26     27.7     1.7     6.54%
28     29.3     1.3     4.64%
30     30.8     0.8     2.67%
32     33.3     1.3     4.06%
34     35.1     1.1     3.24%
36     37     1     2.78%
38     38.9     0.9     2.37%
40     40.5     0.5     1.25%
42     42     0     0.00%
44     44     0     0.00%
46     46     0     0.00%
48     48     0     0.00%
50     50.5     0.5     1.00%
55     54     -1     -1.82%
60     59     -1     -1.67%
65     63     -2     -3.08%

sorry, no over 65w data because no bigger PS in lab.

All the best!
David BA4RF
On Sun, Dec 21, 2008 at 1:03 PM, Gary Smith <Gary at doctorgary.net> wrote:

> Firstly
>
> Got the K3 assembled. The transverter board was back ordered and so
> is the subreceiver so I will be re entering the K3 and adding to it
> at least twice over the next few months. I'm not looking forward to
> the disassembly & re-assembly but doing the kit sure gave me a great
> appreciation for the detail and function this marvelous radio has.
> Absolutely amazing.
>
> Kudos Wane & Eric, you surely have an amazing way of looking at
> things. Most effective and clear.
>
> With that there are a few questions but in the spirit of one at a
> time;
>
> The power supply I have been using in the setup is a Heathkit Power
> supply which was made for one of their last Transceivers. It's a HP-
> 1144 and offers 20 Amps out.
>
> After calibrating the K3 I tried getting 120 watts out to the dummy
> load but after the 50 watt calibration, when I held tune down to see
> how it read. I only got 102-105W out, not 120, though I set he power
> out at 120W. I'm wondering if the Heath power supply is lacking and
> that's the reason for the lower maximum output? It seemed to work
> well as a backup for the Omni V & corsair.
>
> Idears?
>
> Thanks
> Gary
> (One year older as of yesterday...)
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