[Elecraft] KX3 - Low sensitivity on 12M band

[Bert]

After putting up a new antenna for the WARC bands, I noticed that the 
signals on the 12M band
on the KX3 seemed kind of muted and decided to check the sensitivity 
with the signal generator.


Pre-amp on the KX3 was set to 20 dB for S9 with a signal of -73 dBm on 
all bands. All bands seem
to be OK except 12M where a signal of -63 dBm was needed to get S9 on 
the S-meter.


Any ideas or suggestions? Thanks!

73 Bert VE3NR
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[Elecraft] Elecraft P/N 620021 source

[Paul Kemp]

I am looking for a source (besides Elecraft) of the E620021 connector and pins 
that is used in the K1. It is the 2 pin female connector that plugs into the 
speaker connector on the RF board.

Does anyone have a source (Digikey, Mouser, Allied, Newark, etc.) and the 
correct part numbers for both the connector housing and the connector pins? I'd 
like to have a spare connector and several pins in the event I break a wire or 
want to add a Cumbria Designs X-lock board to my K1.

Paul WB0CJB

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Re: [Elecraft] TX Gain calibration fails

[William Hammond via Elecraft]

Hi Joachim , How are you adjusting the power in each of the three power 
settings.  Do you have the coax and dummy load connected directly to the K3?  
Trade out the short jumper to the dummy load to assure yourself it is good.  
After that, I would measure power with an external calibrated wattmeter.  The 
K3 utility is obviously not seeing the power it is looking for, low by .5 to 12 
watts depending on the power setting.

73, Bill-AK5X 

> On Dec 30, 2021, at 11:53 AM,   wrote:
> 
> Hi,
> 
> I tried to go through TX Gain calibration on my K3 (after VCO MD cal), but
> it fails (see below). Does anyone have an idea what to do in this case?
> 
> 73, Joachim DL7JP
> 
> ---
> 
> Elecraft K3 Utility Revision 1.15.8.18
> OS Version 6.2 Build 9200 Windows 8
> K3 MCU revision 05.67. RS-232 speed 38400 bit/s.
> Starting 5 watt calibration
> Calibrating at 1.900 MHz
> Calibrating at 3.750 MHz
> Calibrating at 5.336 MHz
> Calibrating at 7.150 MHz
> Calibrating at 10.125 MHz
> Calibrating at 14.200 MHz
> Calibrating at 18.110 MHz
> Calibrating at 21.200 MHz
> Calibrating at 24.930 MHz
> Calibration power settled at "  4.5 W ;"
> Tx Gain calibration failed because transmit power did not reach the expected
> value
> 5 watt calibration failed
> Elapsed time: 47 seconds
> 
> Elecraft K3 Utility Revision 1.15.8.18
> OS Version 6.2 Build 9200 Windows 8
> K3 MCU revision 05.67. RS-232 speed 38400 bit/s.
> Starting 50 watt calibration
> Calibrating at 1.900 MHz
> Calibrating at 3.750 MHz
> Calibrating at 5.336 MHz
> Calibrating at 7.150 MHz
> Calibrating at 10.125 MHz
> Calibrating at 14.200 MHz
> Calibrating at 18.110 MHz
> Calibrating at 21.200 MHz
> Calibrating at 24.930 MHz
> Calibrating at 29.000 MHz
> Calibrating at 52.000 MHz
> Calibration power settled at "  38 W ;"
> Tx Gain calibration failed because transmit power did not reach the expected
> value
> 50 watt calibration failed
> Elapsed time: 49 seconds
> 
> K3 Tx Gain Calibration data written on 2021-12-30 at 18:45:57
> K3 Serial Number 07445
> K3 MCU revision 05.67. RS-232 speed 38400 bit/s.
> Elecraft K3 Utility Revision 1.15.8.18
> 1900 kHz TxGain LP  64
> 3750 kHz TxGain LP  19
> 5336 kHz TxGain LP  35
> 7150 kHz TxGain LP  54
> 10125 kHz TxGain LP  56
> 14200 kHz TxGain LP  12
> 18110 kHz TxGain LP  23
> 21200 kHz TxGain LP  42
> 1900 kHz TxGain HP  25
> 3750 kHz TxGain HP  32
> 5336 kHz TxGain HP  40
> 7150 kHz TxGain HP  33
> 10125 kHz TxGain HP  27
> 14200 kHz TxGain HP  12
> 18110 kHz TxGain HP  10
> 21200 kHz TxGain HP  06
> 24930 kHz TxGain HP  08
> 29000 kHz TxGain HP  04
> 
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[Elecraft] TX Gain calibration fails

[dl7jp]

Hi,

I tried to go through TX Gain calibration on my K3 (after VCO MD cal), but
it fails (see below). Does anyone have an idea what to do in this case?

73, Joachim DL7JP

---

Elecraft K3 Utility Revision 1.15.8.18
OS Version 6.2 Build 9200 Windows 8
K3 MCU revision 05.67. RS-232 speed 38400 bit/s.
Starting 5 watt calibration
Calibrating at 1.900 MHz
Calibrating at 3.750 MHz
Calibrating at 5.336 MHz
Calibrating at 7.150 MHz
Calibrating at 10.125 MHz
Calibrating at 14.200 MHz
Calibrating at 18.110 MHz
Calibrating at 21.200 MHz
Calibrating at 24.930 MHz
Calibration power settled at "  4.5 W ;"
Tx Gain calibration failed because transmit power did not reach the expected
value
5 watt calibration failed
Elapsed time: 47 seconds

Elecraft K3 Utility Revision 1.15.8.18
OS Version 6.2 Build 9200 Windows 8
K3 MCU revision 05.67. RS-232 speed 38400 bit/s.
Starting 50 watt calibration
Calibrating at 1.900 MHz
Calibrating at 3.750 MHz
Calibrating at 5.336 MHz
Calibrating at 7.150 MHz
Calibrating at 10.125 MHz
Calibrating at 14.200 MHz
Calibrating at 18.110 MHz
Calibrating at 21.200 MHz
Calibrating at 24.930 MHz
Calibrating at 29.000 MHz
Calibrating at 52.000 MHz
Calibration power settled at "  38 W ;"
Tx Gain calibration failed because transmit power did not reach the expected
value
50 watt calibration failed
Elapsed time: 49 seconds

K3 Tx Gain Calibration data written on 2021-12-30 at 18:45:57
K3 Serial Number 07445
K3 MCU revision 05.67. RS-232 speed 38400 bit/s.
Elecraft K3 Utility Revision 1.15.8.18
1900 kHz TxGain LP  64
3750 kHz TxGain LP  19
5336 kHz TxGain LP  35
7150 kHz TxGain LP  54
10125 kHz TxGain LP  56
14200 kHz TxGain LP  12
18110 kHz TxGain LP  23
21200 kHz TxGain LP  42
1900 kHz TxGain HP  25
3750 kHz TxGain HP  32
5336 kHz TxGain HP  40
7150 kHz TxGain HP  33
10125 kHz TxGain HP  27
14200 kHz TxGain HP  12
18110 kHz TxGain HP  10
21200 kHz TxGain HP  06
24930 kHz TxGain HP  08
29000 kHz TxGain HP  04

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Re: [Elecraft] KAT500 Attenuator

[Wes]

I think the only thing that is for sure is that this is very poorly documented.  
The schematic shows two resistors, the assembly manual shows one, and the 
correct value of the one (by my measurement) is unknown.  Whether or not it is, 
or isn't, used is another unknown.  It seems to me that Elecraft could comment 
on this and clear this up, but that hasn't been forthcoming.  Silence isn't 
always golden.


Wes  N7WS




On 12/15/2021 3:52 PM, Al Lorona wrote:

  Have we, in fact, established that this attenuator is enabled at any point of 
the tune cycle? Because if not, then we're all spun up for nothing.
Is it reasonable to believe that the attenuator was one of those design 
elements that might have been deemed necessary at one time but then the 
designers changed their mind for the finished product?  I think so. The 
mysterious R7 may have been left off of the final circuit board precisely to 
cause such a bad mismatch that it would be obvious to operator, software, or 
both, and so that corrective action could be taken.
Al  W6LX/4



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Re: [Elecraft] I'm Thrilled with my new K4

[Robert Sands]

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Re: [Elecraft] Elecraft E850463 cable

[Mike Murray]

Hi Sam

Thanks for the response but the cable has already been spoken for.

73,
Mike w0ag

On Wed, Dec 29, 2021 at 9:58 PM Sam Sargent  wrote:

> Hi Mike,
>
> I read your post yesterday, 12/28, on the Elecraft BB.  I wonder if you
> still have the cable.  I have ordered a K4 and will probably need it.
>
> I will send you the $15 plus S+H.  I am not a fan of Pay Pal and would
> prefer using a postal MO.
>
> I look forward to your response.
>
> 73 N1OVA
> Sam Sarent
>
> --
Sent from Gmail Mobile
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Re: [Elecraft] K4D Owner Manual

[Thorsten Fricke]

Hi Sam,

Am 30.12.21 um 06:45 schrieb Sam Sargent via Elecraft:

I have ordered a K4D transceiver and would like to read the "Owner Manual".  I printed 
the "Introduction to the Elecraft K4" and have read it.  However, I hope that there is a 
more comprehensive manual available.  I have looked at the manual embedded in the K4 but have not 
tied to print it since the black background chews up lots of toner.  If anyone can suggest a source 
where I can find a PDF of an Operator manual for the K4D I will be grateful.  Thanks in advance.  
73 All.  N1OVA Sam.


did you check at the Elecraft page directly
(https://elecraft.com/pages/manuals-downloads)?

There is a dropdown for "K4 Manuals" -> "K4 High Performance Direct
Sampling SDR Manuals and Other Materials" and the 4th entry should be
the manual you're looking for as PDF.

Hope that helps es vy 73 de Thorsten, DH4FT

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Re: [Elecraft] K4D Owner Manual

[George Briggs]

I converted the manual to a version with a white background.  I will be happy 
to  send a copy to anyone who requests one.
73,
George K2DM


Sent from Mail for Windows

From: Sam Sargent via Elecraft
Sent: Thursday, December 30, 2021 12:47 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K4D Owner Manual

I have ordered a K4D transceiver and would like to read the "Owner Manual".  I 
printed the "Introduction to the Elecraft K4" and have read it.  However, I 
hope that there is a more comprehensive manual available.  I have looked at the 
manual embedded in the K4 but have not tied to print it since the black 
background chews up lots of toner.  If anyone can suggest a source where I can 
find a PDF of an Operator manual for the K4D I will be grateful.  Thanks in 
advance.  73 All.  N1OVA Sam.
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