So I’m just gonna say this:
He’s Don the Mon (that’s Spanish for ‘man’)!
Thanks,
Mike NJ2OM
> On Jul 26, 2020, at 10:54 AM, Don Wilhelm wrote:
>
> Mike,
>
> That is good news - it sounds like you are back in business with the K2/100.
>
> 73,
> Don W3FPR
>
>> On 7/25/2020 12:19 PM, Mike
Final update...
After several weeks of troubleshooting, led by Don, W3FPR, of realigning
bandpass filters, checking RF and DC voltages per the K2 manual, and finally
confirming that the bias voltages were correct to the Q7 & Q8 finals, Don
suggested ordering the K2PAKIT and replacing the
Mike,
You are the only one who can determine this. Everyone else is reduced to
guessing because they don't have access to your PSU/K2/power lead.
Simple:
Measure the PSU voltage on RX at the PUS terminals.
Measure the PSU voltage on TX set to 100W at the PSU terminals.
Compare both of these
Don, this is what you sent earlier:
“If the power supply voltage is not the problem, then remove the KPA100 from
the base K2 and realign the bandpass filters. Connect a dummy load to the base
K2 BNC ANT jack. After that, check the maximum power from the base K2 - you
should have at least 10
Yep I’m familiar with that formula.
One of the tests in the assembly instructions was to test the current draw at
100w. It was 13A. The acceptable range was 13-18A so I thought that was a good
result.
Thanks,
Mike NJ2OM
> On Jun 30, 2020, at 11:20 PM, Nr4c wrote:
>
> Watts is Volts X
Watts is Volts X Amps.
Fewer Volts means more Amps. More Amps means more work for power supply,
leading to fewer Volts. Fewer Volts means ...( you get the picture).
Sent from my iPhone
...nr4c. bill
> On Jun 30, 2020, at 8:37 PM, Mike Kopacki wrote:
>
> I didn’t have ring connectors big
.@embarqmail.com
Cc: "elecraft@mailman qth. net"
Sent: Wednesday, July 1, 2020 12:34:48 AM
Subject: Re: [Elecraft] K2 K2/100 post FD review
I didn’t have ring connectors big enough but I did have spade connectors. I
crimped and soldered them but there was no change in the voltage reading
ilto:donw...@embarqmail.com>
*Sent: *Tuesday, June 30, 2020 6:01 PM
*To: *Mike Kopacki <mailto:mikekopa...@gmail.com>
*Cc: *elecraft@mailman qth. net <mailto:elecraft@mailman.qth.net>
*Subject: *Re: [Elecraft] K2 K2/100 post FD review
Mike,
You should have only 0.3 volts drop IN the K2 itself
Mike,
The K2 RF gain is higher on 80, 40, and 30 meters. It takes a bit more
drive and current on the higher bands.
Have you verified the power output of the base K2 with the KPA100
removed? That is an important parameter to investigate.
After verifying that the base K2 is capable of
me.
>>>
>>> The P/S output is 13.6V. I’m seeing 13.1V at the K2. If the normal drop
>>> is .3V, it should read 13.3V at the K2. Is the difference of .2V
>>> “substantial”?
>>>
>>> Mike NJ2OM
>>>
>>> Sent from Mail <ht
10
>>
>> *From: *Don Wilhelm <mailto:donw...@embarqmail.com>
>> *Sent: *Tuesday, June 30, 2020 6:01 PM
>> *To: *Mike Kopacki <mailto:mikekopa...@gmail.com>
>> *Cc: *elecraft@mailman qth. net <mailto:elecraft@mailman.qth.net>
>> *Subject: *Re: [Elec
gt;
*Cc: *elecraft@mailman qth. net <mailto:elecraft@mailman.qth.net>
*Subject: *Re: [Elecraft] K2 K2/100 post FD review
Mike,
You should have only 0.3 volts drop IN the K2 itself, so given your
display of 13.1 volts on the K2, that says you have a substantial
voltage drop in the power cabl
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Mike,
You should have only 0.3 volts drop IN the K2 itself, so given your
display of 13.1 volts on the K2, that says you have a substantial
voltage drop in the power cable.
Is it wired directly to the power supply? Are all the connections
tight? Is the APP assembly at the K2 correct? Look
The connections may be tight, but how many are there? Are you running straight
from the power supply to the radio without any intervening junction points, Rig
Runners, etc.?
Grant NQ5T
> On Jun 30, 2020, at 5:32 PM, Mike Kopacki wrote:
>
> Don...
>
> The power supply is an MFJ 13.8V/25A
Don...
The power supply is an MFJ 13.8V/25A switching power supply. It measures 13.63V
at the terminals.
The K2 shows 13.1V in receive mode.
During transmit on all bands, the K2 shows 11.3-11.9V, depending on the band.
All the power connections appear to be tight.
Thanks,
Mike NJ2OM
>
Mike,
It is not reasonable to expect a normal wattmeter to have greater than a
10% accuracy.
Consider that the spec for a Bird wattmeter is only 5% right after
calibration.
Digital wattmeters can be much more accurate, such as the LP-100 from
Telepostinc, but they are calibrated to NIST
Okay. I will go back to your first reply and run through the items you
suggested.
Does the fact that on 40 and 80 meters, when I set the requested power to 100w,
I actually see a little more - like 103w - but the power drops off on other
bands - is that a clue to anything?
Thanks,
Mike NJ2OM
Mike,
No, the KPA100 wattmeter will display the actual power being produced if
it is well calibrated.
That is not necessarily the same as the requested power, although with a
properly working KPA100 and a calibrated KPA100 wattmeter, the reading
should be the same.
73,
Don W3FPR
On
I can run through some of the items you suggest. But I don’t have an external
wattmeter that can measure 100 watts. I do have a QRP wattmeter.
I will start tomorrow to try and work through the question.
But to be completely accurate...you are saying that the KPA100 wattmeter (which
is what I
Congratulations, Mike! Please let us ALL know how it goes, as we of the K2
clan learn something with every post.
73 Eric WD6DBM
On Sun, Jun 28, 2020, 2:12 PM Mike Kopacki wrote:
> Well, that gives me something to do! I’ll let you know how it goes.
>
> Thanks,
> Mike NJ2OM
>
> > On Jun 28,
Well, that gives me something to do! I’ll let you know how it goes.
Thanks,
Mike NJ2OM
> On Jun 28, 2020, at 4:41 PM, Don Wilhelm wrote:
>
> Mike,
>
> Congratulations on finishing the K2/100.
>
> On the power output variation, that is not normal.
> First check the voltage delivered to
Mike,
Congratulations on finishing the K2/100.
On the power output variation, that is not normal.
First check the voltage delivered to the K2 while in transmit.
You should do that by tapping DISPLAY and scrolling to the voltage
display. Your power source should provide at least 13.8 volts,
I was able to finish my KPA100 a few days ago, just in time for Field Day.
The amp worked flawlessly! No error messages, over heating, etc. made 451
contacts on CW and phone with no bad reports.
I am extremely pleased and wish to thank the Elecraft team for developing
such a great kit!
I did
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