[Elecraft] K2 Sold

2012-03-03 Thread Dave & Jeanne
Everyone,
The K2 has been sold. Thanks for all your responses.
73
Dave KD1NA

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[Elecraft] K2 -100 For Sale

2012-03-01 Thread Dave & Jeanne
Everyone,
I guess I screwed up when I first posted my first K2 sale posting Today.
My K2 is a 100 watt unit with serial numbers in the 5000 area. The amp 
is in the top of the K2's case while the coupler is in it's original 
case and serves as the base of the K2. Internal devices include the 
KSB2, KNB2, and digital signal processor unit (KDSP2). It works fine and 
is in a non smoking environment. Only issue is sometimes the KDSP2 might 
not come up when first powering up the radio. The fix is to power cycle 
the k2 and the DSP unit boots and works fine. Asking $800.00 or any 
reasonable offer. Shipping depends on buyer's location and offer made. 
Reason for selling the K2 is purchasing a KX3 and need the money.
73
Dave KD1NA
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[Elecraft] DX Listings

2012-02-07 Thread Dave & Jeanne
Thanks for the tremendous response in providing me DX listings.
Thanks again and 73
Dave KD1NA
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[Elecraft] DX list

2012-02-07 Thread Dave & Jeanne
Where can I find a printable listing of the call prefixes and country 
names worldwide in the internet that I can print out.
Thanks
Dave KD1NA
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[Elecraft] Happy Holidays!

2011-12-24 Thread Dave & Jeanne
To everyone,
I wish you a very happy holiday season as well as a great and successful 
New Year.

To all at Elecraft, Thanks for both fantastic and quality products and 
the best customer support anywhere.

Good wishes all and good DX
73 Dave KD1NA
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[Elecraft] Tokyo High Power HL-1.5-KFX

2011-10-01 Thread Dave & Jeanne
I am willing to sell the linear for $2,2000 with buyer paying shipping 
here in CONUS. Please contact me directly
73
Dave KD1NA
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[Elecraft] Tokyo High Power HL-1.5-KFX

2011-10-01 Thread Dave & Jeanne
Everyone.
Sorry for the bandwidth but I had thought the Tokyo High Power 
HL-1.5-KFX 1 KW linear was sold. The deal fell through as the buyer felt 
I was less than honest when presenting the facts about the linear. Well 
it is for sale again. you can google Tokyo High  Power or HL-1.5-KFX and 
find out all about it.  I would be willing to send pictures and supply 
any other information you want about the linear. Please note that there 
is a small scratch on the top rear of the case that is almost totally 
polished out otherwise the linear is in excellent condition. It costs me 
$3,200 new from HRO about a year ago. It is in a nonsmoking environment 
and has been carefully used. Anybody interested please feel free to 
contact me directly with questions of reasonable offers.
Thanks and 73
Dave KD1NA
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[Elecraft] Linear for sale

2011-09-28 Thread Dave & Jeanne
Everyone,  This is my third posting with this add.
I have a Tokyo High Power linear amplifier for sale. It is in like new 
condition and been used very carefully with no problems. It is less than 
a year old and It looks just like it came out of the box and works just 
as well. The model number is HL1.5KFX. I have the original shipping box. 
It ships with an Elecraft K3 interface cable
More information on the linear can be obtained from the website below.

http://www.tokyohypower.com/hl-1_5kfx.html.

I am entertaining reasonable offers. It sells from HRO for >$3000.00.

Please respond directly.
73
Dave KD1NA
kd...@arrl.net
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[Elecraft] Linear For Sale

2011-09-25 Thread Dave & Jeanne
Everyone,
I have a Tokyo High Power linear amplifier for sale. It is in like new 
condition and been used very carefully with no problems. It is less than 
a year old and It looks just like it came out of the box and works just 
as well. The model number is HL1.5KFX. I have the original shipping box
More information can be obtained from the website below.

http://www.tokyohypower.com/hl-1_5kfx.html.

I am entertaining reasonable offers. It sells from HRO for >$3000.00.

Please respond directly.
73
Dave KD1NA
kd...@arrl.net


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Re: [Elecraft] [Elecfaft K3] Power Cycle

2011-02-07 Thread Dave & Jeanne
Thanks for the information. Very interesting and it fully explains why 
it is important to do a power reset after a firmware upgrade.
73
Dave KD1NA

On 2/7/2011 10:45 AM, Dick Dievendorff wrote:
> There is a subtle difference. The K3 Utility does indeed issue a command that 
> causes a reset. However pressing the power button initiates what Wayne calls 
> "parameter save" where selected parameters (like the VFO frequency) are saved 
> to EEPROM for use after the next start.
>
> So power off and on is just a bit more than reset.
>
> Config save preserves this EEPROM. During restore I write to that EEPROM, 
> then reset the MCU. During startup the newly restored EEPROM is used to set 
> up RAM versions  of config. Restore wouldn't work if EEPROM were written as 
> part of the post-restore reset.
>
> To see this at work: turn the VFO to 7.0 MHz, then turn the radio off and 
> on. It should come back at 7.000 MHz. Then turn the VFO to 7.050. Then load 
> firmware. After the firmware reset completes, what VFO setting do you see? 
> That's the EEPROM parameter save at work. If you save and restore config, the 
> current VFO setting us one of those settings.
>
> Dick, K6KR
>
> On Feb 7, 2011, at 7:34, "David Robertson"  wrote:
>
>> Everyone,
>> Many times by both the K3 engineers and others it has been stated to recycle 
>> the K3 power after doing a firmware upgrade. I understand the logic behind 
>> this action and do perform a power reset after doing a firmware upgrade or 
>> reload.  My question is this. Every time a firmware upgrade is installed 
>> there are several apparent power resets that occur, even after the firmware 
>> install is finished. Am I correct in assuming these apparent power resets 
>> are not complete resets?
>>
>> Thanks and 73
>> Dave KD1NA
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[Elecraft] [K3] Tokyo High Power

2010-10-10 Thread Dave & Jeanne Robertson
Does anyone use the Tokyo High Power linear amp (HL-1.5kfx) with their K3? If 
you do I need to ask how you connect the auto band switching to the linear with 
the K3?

The manual doesn't refer to the K3 at all but refers to Kenwood. It appears to 
use a Serial connection from the rig to the amp and is restricted to 9600 baud 
comm speed.  I have a P3 and it requires a 38400 baud connection. For a test I 
tried to change the baud rate to 9600 only to have the K3 change it back to 
38400 (note the P3 is connected during this time). It appears that you cannot 
use the P3 at the same time you use auto band switching in the THP linear. Am I 
correct in this assumption and if I am not could you please enlighten me.
Thanks in advance.
Dave KD1NA
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[Elecraft] [K2] [Kio2]

2010-08-30 Thread Dave & Jeanne Robertson
Everyone.
The KIO2 is sold. However anyone needing a top cover with speaker for the K2 
make me an offer.
73
Dave KD1NA
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[Elecraft] K2 Stuff For Sale

2010-05-11 Thread Dave & Jeanne Robertson
I have the following item for sale:
The top cover for the K2 containing a speaker, KIO2 Serial Interface, and KAT2 
Antenna tuner.

Comes with all manuals. Will sell complete or seperate. I built the units and 
they are fully tested.
Looking for $225.00 plus shipping or best offer within reason. Please contact 
me off list.

Thanks
Dave KD1NA
dar...@comcast.net
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[Elecraft] K3 AM

2010-04-10 Thread Dave & Jeanne Robertson
John,

Setting your power control to 110 watts will produce about 28 watts of carrier 
power and about 78 watts peak which is normal. I have received very good audio 
reports on AM both running barefoot or using my linear and limiting my carrier 
power to no more then 120 watts.

I am assuming you have the K3's antenna tuner. If you do then initially you 
must tap the ATU Tune button to get your swr down. The K3 will remember the 
antenna tuner settings for that band and the area of the band. The only time 
you have to repeat it is when you change the antenna for that band. The antenna 
tuner in the K3 doesn't automatically tune up, you must do it from the ATU 
button. Because I change antennas from time to time I always tap the ATU button 
just to be sure everything is ok.
Running less then 10 watts switches out the 100 watt amp so if you let the rig 
transmit with 5 watts with high SWR you will tax the 10 watt PA

73
Dave KD1NA
  - Original Message - 
  From: John Parker 
  To: dar...@comcast.net 
  Sent: Saturday, April 10, 2010 6:02 PM
  Subject: your K3 AM Tip


Thanks for your tip about using split for AM. I made a few contacts one 
evening on 80M, but I was not sure how to set the power out. The manual has 
virtually no info on AM operation. How do you set the power out? I have 
information on how to set power out for an amp, but not the K3. I have an old 
friend that works AM on 40M so I need to learn how to do this right.

By the way I almost smoked something in the 10 watt amp in the K3. I am 
used to turning the power to around 5 watts on my ond Ten Tec gear and tuning 
the antenna tuner. I forgot that the K3 has TWO amps, and I got the low power 
one smelling on high SWR before I noticed it and quit. Everything seems OK but 
one day I am going to open it up and see what is discolored and change it out. 
I did not build mine, I bought it used and it is factory built. I should have 
built one then I would know this type of stuff.

If you have time please let me know about the AM setup.

73, John WB4UHC
johnj...@verizon.net or wb4...@arrl.net
   
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[Elecraft] Elcraft W2 Sensor Head

2010-04-07 Thread Dave & Jeanne Robertson
Thanks David. The PCB inside does have the LOAD and INPUT connectors labeled.

--
73, Gary AB7MY
=
supp...@elecraft.com
Elecraft Technical Support  
Gary, you are right, but if you forget to look at the PC Board,it is easy to 
put the cover on backwords.73Dave KD1NA
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Re: [Elecraft] K3 Firmware Update.

2010-04-03 Thread Dave & Jeanne Robertson
Thanks Guy I appreciate the support. Elecraft Listen to your customers. It 
is best to be safe and don't play with your computer while updateing your K3 
firmwhare. It is only 15 minutes max.

73
Dave KD1NA
K3 #934
- Original Message - 
From: "Guy Olinger K2AV" 
To: "Dave & Jeanne Robertson" 
Cc: "Dick Dievendorff" ; "Elecraft" 

Sent: Saturday, April 03, 2010 6:15 PM
Subject: Re: [Elecraft] K3 Firmware Update.


Sorry, Dick

Plenty of others have had that "killed it by starting a browser"
experience, including myself.  It WAS a P4 with memory being stretched
by security patches, etc.

I now have a PC based on a quad-core Intel I7 920 with 6 gig of almost
cache speed 3 channel memory.  I don't worry about it now.

If you are running a PC with a single core processor and/or limited
memory (as in an older PC which you have kept to use for logging
programs), better to not tempt fate.  PC's and Windows can do strange
things when swapping a lot of memory in and out to disk, which could
not be blamed on the utility, apparently including overwriting memory
in use by the utility.  It's Windows blowing the multitasking, not
Elecraft.

73, Guy.

On Sat, Apr 3, 2010 at 5:29 PM, Dave & Jeanne Robertson
 wrote:
> Dick,
>
> Thanks for the input and I stand corrected. I myself have never had a
> problem with an up-date. However, I still maintain that be safe when
> up-dating by leaving the system alone during the process. Having worked on
> software operated atomic particle accelerator systems and having the
> software people assure me that there is no way to lock the system up while 
> I
> am at the customer's site with a 4 million dollar tool that is off line 
> with
> locked up software.
>
> 73
> Dave KD1NA
>
>
> - Original Message -
> From: "Dick Dievendorff" 
> To: "'David Robertson'" ; 
> Cc: "'Elecraft'" 
> Sent: Saturday, April 03, 2010 11:36 AM
> Subject: RE: [Elecraft] K3 Firmware Update.
>
>
>> There should be no data corruption caused by using other programs while
>> the
>> K3 Utility is sending firmware to the K3. Closing the K3 Utility during a
>> firmware update (which should cause an "are you sure" sort of dialog) 
>> will
>> require that you send that firmware file again, and if it's the MCU, the
>> MCU
>> goes into a "boot loader" state which looks different and may require a 
>> K3
>> power cycle by removing the power plug.
>>
>> The protocol used during firmware update doesn't have really tight timing
>> requirements. There is a checksum test and an acknowledgement on each
>> block
>> sent.
>>
>> Most Windows systems are sharing time with a whole lot of processes even
>> when you're not actively doing anything on the desktop.
>>
>> I routinely go through e-mail or compile other programs while firmware is
>> loading, and I probably load firmware more often than anyone except
>> perhaps
>> Wayne and Lyle.
>>
>> Dick, K6KR
>>
>>
>> -Original Message-
>> From: elecraft-boun...@mailman.qth.net
>> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Robertson
>> Sent: Saturday, April 03, 2010 5:54 AM
>> To: phys...@mac.com
>> Cc: Elecraft
>> Subject: [Elecraft] K3 Firmware Update.
>>
>> Phil,
>>
>> It is very important that you be certain that whatever you use to get a
>> RS232 connection from your computer to the K3 is good.
>> Running HRD (Ham Radio Deluxe) is a good test. Have your K3 set at the
>> highest baud rate it can do because that is what the K3 utility is going
>> to
>> use.
>>
>> When upgrading your firmware do not do anything on the computer until the
>> up-date is finished. Clicking around your Desktop or going to other
>> applications in your computer during the up-date can result in a time
>> slice
>> in the process which can corrupt data.
>>
>> Enjoy your K3!
>>
>> 73
>> Dave KD1NA
>> __
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>>
>>
>
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Re: [Elecraft] K3 Firmware Update.

2010-04-03 Thread Dave & Jeanne Robertson
Dick,

Thanks for the input and I stand corrected.  I myself have never had a 
problem with an up-date. However, I still maintain that be safe when 
up-dating by leaving the system alone during the process. Having worked on 
software operated atomic particle accelerator systems and having the 
software people assure me that there is no way to lock the system up while I 
am at the customer's site with a 4 million dollar tool that is off line with 
locked up software.

73
Dave KD1NA


- Original Message - 
From: "Dick Dievendorff" 
To: "'David Robertson'" ; 
Cc: "'Elecraft'" 
Sent: Saturday, April 03, 2010 11:36 AM
Subject: RE: [Elecraft] K3 Firmware Update.


> There should be no data corruption caused by using other programs while 
> the
> K3 Utility is sending firmware to the K3.  Closing the K3 Utility during a
> firmware update (which should cause an "are you sure" sort of dialog) will
> require that you send that firmware file again, and if it's the MCU, the 
> MCU
> goes into a "boot loader" state which looks different and may require a K3
> power cycle by removing the power plug.
>
> The protocol used during firmware update doesn't have really tight timing
> requirements.  There is a checksum test and an acknowledgement on each 
> block
> sent.
>
> Most Windows systems are sharing time with a whole lot of processes even
> when you're not actively doing anything on the desktop.
>
> I routinely go through e-mail or compile other programs while firmware is
> loading, and I probably load firmware more often than anyone except 
> perhaps
> Wayne and Lyle.
>
> Dick, K6KR
>
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Robertson
> Sent: Saturday, April 03, 2010 5:54 AM
> To: phys...@mac.com
> Cc: Elecraft
> Subject: [Elecraft] K3 Firmware Update.
>
> Phil,
>
> It is very important that you be certain that whatever you use to get a
> RS232 connection from your computer to the K3 is good.
> Running HRD (Ham Radio Deluxe) is a good test. Have your K3  set at the
> highest baud rate it can do because that is what the K3 utility is going 
> to
> use.
>
> When upgrading your firmware do not do anything on the computer until the
> up-date is finished. Clicking around your Desktop or going to other
> applications in your computer during the up-date can result in a time 
> slice
> in the process which can corrupt data.
>
> Enjoy your K3!
>
> 73
> Dave KD1NA
> __
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>
> 

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[Elecraft] K3 firmware 3.57 Beta

2009-11-12 Thread Dave & Jeanne Robertson
Everyone,

The new beta completly solved the problem of no output in Digital A mode after 
tune. The sinc AM also really works nice. Thanks Elecraft.

Dave KD1NA
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Re: [Elecraft] K3 No output in digital mode

2009-11-08 Thread Dave & Jeanne Robertson
Thanks for the reply.  Increasing the number of bars on the ALC ( by either 
increasing the mic gain or audio drive from the computer) has no effect on 
the getting output power. leaving the audio drive where is is (3 bars) and 
changing modes on the K3 then returning to Digital A mode will now produce 
the requested output power. This indicates the audio drive is not a problem. 
Holding the TUNE button starts the problem of no RF out again.

Last night I received an e-mail from Wayne Burdick of Elecraft indicated 
they have solved the problem and it will be released in a beta soon.
73 Dave KD1NA


- Original Message - 
From: "John E. Reiser" 
To: "Dave & Jeanne Robertson" ; "Elecraft Support" 
; "Elecraft" 
Sent: Sunday, November 08, 2009 7:02 AM
Subject: Re: [Elecraft] No output in digital mode


>> 2, The ALC readout is showing the usual 3 bars and can be adjusted
>
> Shouldn't you be showing 4-5 bars on the ALC meter?  Maybe your audio is 
> insufficient.
>
> John
>
>
> - Original Message - 
> From: "Dave & Jeanne Robertson" 
> To: "Elecraft Support" ; "Elecraft" 
> 
> Sent: Saturday, November 07, 2009 7:37 PM
> Subject: [Elecraft] No output in digital mode
>
>
>> When operating in digital A modes after holding the TUNE button, which 
>> gives the proper power out indication, the following happens when going 
>> into PSK transmit:
>> 1, There is no power out of the K3
>> 2, The ALC readout is showing the usual 3 bars and can be adjusted
>> 3, There is no monitoring tone ( I have the monitor set at 6 to monitor 
>> my output signal on psk).
>>
>> Changing modes to USB and back to Data A mode temporarily fixes the 
>> problem until you hold the TUNE button again while in Data A mode.
>>
>> The firmware revisions that have this problems are;
>> 3.44, 3.45 (a special firmware sent to me by Elecraft), and 3.52.
>>
>> Revisions 3.42 and below work fine. Others have reported this but I just 
>> wanted to give my $0.02 worth.
>>
>> 73
>> Dave KD1NA
>> __
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>
> 

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[Elecraft] No output in digital mode

2009-11-07 Thread Dave & Jeanne Robertson
When operating in digital A modes after holding the TUNE button, which gives 
the proper power out indication, the following happens when going into PSK 
transmit:
1, There is no power out of the K3
2, The ALC readout is showing the usual 3 bars and can be adjusted
3, There is no monitoring tone ( I have the monitor set at 6 to monitor my 
output signal on psk).

Changing modes to USB and back to Data A mode temporarily fixes the problem 
until you hold the TUNE button again while in Data A mode.

The firmware revisions that have this problems are;
3.44, 3.45 (a special firmware sent to me by Elecraft), and 3.52.

Revisions 3.42 and below work fine. Others have reported this but I just wanted 
to give my $0.02 worth.

73
Dave KD1NA
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[Elecraft] Noise Clicks

2009-11-01 Thread Dave & Jeanne Robertson
After installing 3.52 i also notice noise clicks when making width adjustments 
in SSB CW and Didital mode (Digital-A). I do not have my NB or NR on. This 
noise is only present with signals. with no signals there is no noise when 
adjusting width.

73
Dave KD1NA
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[Elecraft] K3 and Beta 3.44

2009-10-20 Thread Dave & Jeanne Robertson
Everyone,
I installed Beta 3.44 (was at 3.42) and noticed the following:

When operating in TX DATA (DATA A Mode) I fine that my RF Output seems to 
really take a long time to properly adjust itself to the desired power out. 
Sometimes there is no output power even though the K3 is in transmit.  If I 
monitor the transmitted audio I fine there is none. (The computer is outputting 
audio).

During this problem if I hold the XMIT button I do get the desired output but 
trying in XT DATA mode still has no output though the K3 is in transmit.

If I go into USB and back into TX DATA (Data A) mode or power cycle the K3, 
then I have output power but it seems to take a long time to adjust itself.

Reinstalling Firmware 3.32 totally solves the above problems.

Just to be sure I wasn't imagining things I reinstalled Beta 3.44 and the 
problems reappeared, installing beta 3.42 fixed everything

It seems there is a problem with 3.44 Beta firmware unless I am screwing up 
somewhere.

73
Dave KD1NA
K3 934
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[Elecraft] LP=Scan

2009-07-26 Thread Dave & Jeanne Robertson
The LP-Scan system has been sold.
Thanks and 73

Dave KD1NA
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[Elecraft] LP-Pan For Sale

2009-07-26 Thread Dave & Jeanne Robertson
I have a LP-PAN module, and a  Creative E-MU-0202 USB sound module for sale.
Modules work fine and the E-MU module comes in it's origonal box with all 
software and USB cable.
Also include a home built set of cables to interconnect the modules

Asking $225.00 shipping included in USA.
Please contact me off list.

73
Dave KD1NA
dar...@comcast.net
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[Elecraft] Test Message

2009-01-01 Thread Dave & Jeanne Robertson
This is a test to see if it gets through
Happy New Year all
73
Dave KD1NA___
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[Elecraft] K2 For Sale

2008-11-23 Thread Dave & Jeanne Robertson
Everybody,

After receiving my K3 and moving it in my main station I found I don't have any 
need for my extra K2 (I still have a K2-100 in the downstairs station).

This K2 is the qrp model with 11.5 watts out on all bands (plus some) and about 
10.5 watts out on 10 meters at 28.388 MHZ.
This k2 is equipped with the following features:
KSB2 SSB Upgrade.
KIO2 Serial interface.
KAT2 QRP Antenna coupler.
The serial number of the K2 is 5240.
The K2 comes with all manuals as well as the manuals for all the up-grade 
modules.

It is in very good condition and has been completely aligned (Using 
Spectrograph) and tested.
I have use this rig a lot on psk31 and used the Rigblaster Pro as an interface 
(which is also available).
The microphone connector is configured as the K3.

Asking $700.00 for the K2 and $100.00 for the rigblaster pro.

If interested please contact me directly.
I do have a paypal account.

My e-mail is [EMAIL PROTECTED]

Thanks and 73
Dave KD1NA___
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[Elecraft] K3 Temperature Readings

2008-05-31 Thread Dave & Jeanne Robertson
Everyone,

How do I display my FP and Heat Sink temperatures on the front Panel?

I did the calibration and the book explains that you tap Display and use XFO B 
to select the temperature reading you want displayed.
When I tap Display all I can select is Time, Date, Current, and Voltage. No 
temp readings>

Could someone enlighten me on the error of my ways. Thanks.

Dave KD1NA
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[Elecraft] K3 Low Power FM

2008-05-25 Thread Dave & Jeanne Robertson
Here is an update on my low power out on fm.

With all filter in place and with several checks on configuration and reloading 
the radio's firmware I had no success in getting out any more then 2 watts out 
max on FM.

I removed the FM filter and replaced it with a .001 UF capacitor. I was 
successful in putting out any amount of power I selected on FM. I monitored the 
transmittion and it produces a very clean FM signal. So either there is 
something wrong with the filter or RF Board.

Any comments (constructive please).

Thanks
73
Dave KD1NA
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[Elecraft] K3 FM Operation

2008-05-25 Thread Dave & Jeanne Robertson
Okay people I have a question.

How do I get more then 2 watts out of my K3 on FM?

I have the FM filter installed and turned on. I have the FM filter bandwidth 
set at 13 KHZ..
I can tune successfully and put out power in all modes except FM (2 watts out 
max.

The MF mode is working I checked it with another receiver but no real power out.

My K3 has an operating KPA3 and tuner.

Any suggestions would be greatly appreciated.

Thanks
73
Dave KD1NA
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[Elecraft] Computer Speakers

2008-05-11 Thread Dave & Jeanne Robertson
Anyone,
I will soon be receiving my K3 and I do have a question.

Normally my computer line out connects to my computer speakers.  When I get my 
K3 is there a speaker connection on the K3 that will also output audio out from 
the computer such as when not using the radio but still using the computer?

Or do I have to get a stereo Y connector at the line out connection on the K3?

Many thanks in advanced.

Dave KD1NA
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[Elecraft] K3

2007-12-12 Thread Dave & Jeanne Robertson
Well after all the information on this thred and being an owner I finally 
ordered my K3-100.
Looking forward to using it in 08

73
Dave KD1NA
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Fw: [Elecraft] Magnetic Fields

2007-10-10 Thread Dave & Jeanne Robertson





Thanks JF

I will order 2 kits as I have 2 K2s.  I know that the VCO was sensitive to 
AC hum when I placed my hand near T5 but I didn't realize it that 
sensitive. Again many thanks and 73

Dave KD1NA
- Original Message - 
From: "Jean-François Ménard" <[EMAIL PROTECTED]>
To: "Dave & Jeanne Robertson" <[EMAIL PROTECTED]>; 


Sent: Wednesday, October 10, 2007 10:31 AM
Subject: RE : [Elecraft] Magnetic Fields



Hi,

Elecraft already have a mod kit for this kind of
behavior since 2005. The part number is : K2VCOSHLDKT

You can also take a look at the documentation provided
at :

http://www.elecraft.com/manual/K2%20VCO%20sheild%20mod%20rev%20E.pdf

Have a nice day.

JF VA2VYZ

--- Dave & Jeanne Robertson <[EMAIL PROTECTED]> a
écrit :


To All,

First to the good people at elecraft,
congratulations on shipping the K3s.

Second:

This may have been presented to the forum before but
I have not seen it.

Be careful with exposing your K2 to strong magnetic
fields, especially ones from power transformers.

I just finishing restoring an old Heathkit SB220
linear and in setting up the station placed the
linear to the left of the K2.

When I was using the linear I started to notice some
strange distortion in the received audio from the K2
and other stations commented on distortion on my
audio.

On CW all the received signals seem to have a
strange AC ripple on them. It was a very small
amount but still there. Stations receiving me also
reported a slight amount of ripple on my signal.

All this is while the linear was on but not
necessarily being used (I installed a Standby switch
in the SB220).

With the linear powered down, everything was
perfectly normal, both on received  and transmitted
signals.

The power transformers in the SB220 are on the
linear's right side. This was the side the K2 was
located near.

I rearranged the station to have an antenna coupler
between the K2 and the SB220 linear, a spacing of
about 10 inches, and that totally solved the AC
ripple problem both on transmit and receive with the
linear powered up and on-line.

Just thought I would pass this on to everyone.

73
Dave KD1NA
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 Obtenez des réponses à vos questions !
Profitez des connaissances et des opinions des internautes sur Yahoo! 
Questions/Réponses

http://fr.rd.yahoo.com/evt=42054/*http://qc.answers.yahoo.com




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[Elecraft] Magnetic Fields

2007-10-10 Thread Dave &amp; Jeanne Robertson
To All,

First to the good people at elecraft, congratulations on shipping the K3s.

Second:

This may have been presented to the forum before but I have not seen it.

Be careful with exposing your K2 to strong magnetic fields, especially ones 
from power transformers.

I just finishing restoring an old Heathkit SB220 linear and in setting up the 
station placed the linear to the left of the K2.

When I was using the linear I started to notice some strange distortion in the 
received audio from the K2 and other stations commented on distortion on my 
audio.

On CW all the received signals seem to have a strange AC ripple on them. It was 
a very small amount but still there. Stations receiving me also reported a 
slight amount of ripple on my signal.

All this is while the linear was on but not necessarily being used (I installed 
a Standby switch in the SB220).

With the linear powered down, everything was perfectly normal, both on received 
 and transmitted signals.

The power transformers in the SB220 are on the linear's right side. This was 
the side the K2 was located near.

I rearranged the station to have an antenna coupler between the K2 and the 
SB220 linear, a spacing of about 10 inches, and that totally solved the AC 
ripple problem both on transmit and receive with the linear powered up and 
on-line.

Just thought I would pass this on to everyone.

73
Dave KD1NA
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[Elecraft] C227

2007-01-26 Thread Dave &amp; Jeanne Robertson
Mike 
After looking at your picture I think I would only replace C227, Clean up the 
board around it, then test it out (in a dummy load).  Don't think the relay is 
gone but those type of capacitors do sometimes fail.  In your case you were 
trying to couple good VSWR into the rig but haven't succeeded yet and that 
capacitor took a voltage spike. Those capacitors do emit a lot of smoke when 
they fail.

73
Dave KD1NA
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Re: [Elecraft] KPA100 Issue

2007-01-26 Thread Dave &amp; Jeanne Robertson

Thanks for your reply Geoff.

I think that the reason the screws loosen isn't because of twisting out, but 
because the heat sink material that is placed between the power transistors 
and the heat sink is cold flowing.


Many plastics will, under pressure, actually flow a bit and change it's 
shape ( in this case becoming thinner). After a period of time the plastic 
assumes it's final new shape.


Using locktite (especially the permanent type) will make it very challenging 
to remove the screws when needed.


Another idea would be using heat sink compound (a form of heat conducting 
paste) instead of the pads provided by Elecraft. The mounting bracket of the 
power transistors is insulated from the transistor itself by a heat 
conducting oxide so no insulating material is needed for mounting. Just 
mounting the transistor to the heat sink will not provide enough thermo 
conductivity between the transistor and heat sink. That is why Elecraft 
provided the thermo conductive pads. If heat sink compound is used the 
screws will remain tight because there is no lingering cold flow properties 
in the compound.


73
Dave KD1NA

- Original Message - 
From: <[EMAIL PROTECTED]>
To: "David Robertson" <[EMAIL PROTECTED]>; "Elecraft" 


Sent: Thursday, January 25, 2007 11:11 AM
Subject: Re: [Elecraft] KPA100 Issue



Hi David;

I can confirm your experience - and add a bit more.

I too had occasion to remove the KPA100 shield, and found he PA and driver 
fixing screws I had tightened (but not overtightened!) quite loose.


I re-tightened them, but this time overdid it with one of the studs 
tightened with an octagonal wrench, which twisted off. Fortunately a spare 
had been included with the kit, and it was not too difficult to remove and 
replace it.


I wonder if a spot of 'Locktite' (cyanoacrylite 'superglue') applied 
during construction would be a good idea?


Geoff G3NAQ (ex AE4PI)


- Original Message - 
From: "David Robertson" <[EMAIL PROTECTED]>

To: "Elecraft" 
Sent: Thursday, January 25, 2007 1:31 PM
Subject: [Elecraft] KPA100 Issue



To All,

Though there is some mention about tightening the screws that mount the 
final power transistors in the manual, it can be easily missed.


When I first built the KPA100 I made sure the transistor hear sink 
mounting screws were tight.  After operating the rig for about a week 
(and heat cycling the heat sink) I had an opportunity to open up the K2 
to show a friend. At that time something in my mind reminded me to 
recheck the final transistor heat sink mounting screws (please remember 
the screws were carefully tightened upon assembly) and to my surprise I 
could easily tighten the screws 1/2 turn or more! It seems the heat 
conducting material cold flows a bit between the final transistors and 
the heat sink.
So for those who have a KPA100 it would be prudent to check those final 
transistor heat sink mounting screws every so often. If you don't you 
could lose your finals.


73

Dave KD1NA

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[Elecraft] Re RFC 15 miniature?

2007-01-01 Thread Dave &amp; Jeanne Robertson

Bob,

I have just finished my K2 a few days ago and there is a lot I can relate to 
your question about RFC15.


First and most important, these chokes are very fragile and can open up 
quite easily just by flexing the leads too much.


Second I also found the size of these chokes from brown to green body is not 
that much. I chose the brown body 100 mh choke to install as it was slightly 
smaller.


To my demise I couldn't get the PLL circuit to work properly and after 
calling Elecraft they brought my attention to both RFC15 and C88.  When I 
checked I found the choke open. I replaced the choke and the receiver worked 
very well but I seem to have a PLL instability around 7180 KHZ. I was then 
advised to remove RFC 15 and replace it with a wire and be sure C88's leads 
were short. The problem was not solved.  I inserted a ferrite bead on a wire 
that took the place or RFC15 and replace C88 (60 pf) with a 100 pf capacitor 
and the problem is gone.


It is my understanding that not all the K2's have this problem but several 
must have because I got many replies concerning this problem.


Note: Before I started assembly of the K2, I checked all the chokes out with 
a digital Ohm meter to verify they were not resistors. They all measured 
very low resistance so the chokes were good before I mounted them.



Check to make sure RFC-15 is still a low resistance after you solder it in. 
and check around 7175 to 7185 KHZ for instabilities in the VCO.


Good luck and have fun
Dave KD1NA

To: elecraft@mailman.qth.net
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi Folks,
I am building #5930 and I'm at the point of installing
C91, C88 and RFC 15 on the bottom of the rf board at U4.  The manual talks
about a miniature 100 uH choke, much smaller than the other 100 uH chokes 
and
with a tan body. I have 4 green bodied and one tan bodied 100 uH choke, but 
the tan bodied one is pretty close to the
same size as the green ones, if any thing a little bigger. I have no 
miniature chokes at all  I'm sure I can

solder it to the indicated location, but is this something I should be
concerned about? Bernie W1AZ asked this same question on the list back in 
Sept.

but I can't see where anyone answered him.

Thanks in advance,

Bob   K6GGO

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[Elecraft] KPA100 Standoffs between heat sink and board

2006-12-31 Thread Dave &amp; Jeanne Robertson

Ben,

I just finished building my KPA100 and it is quite happy in the K2 at this 
time. I agree with your observation of the milled out hole on the heat sink. 
I tried placing a lock washer between the heat sink and standoff (against 
Elecraft instructions) which resulted in not having the screws on the KPA100 
rear panel match the hole resulting in having to remove the heat sink from 
the KPA100 PCB and removing the lock washer.  Afterwards the screw hole 
aligned perfectly. I do believe the board is warped a little because of the 
machine out portion of the heat sink but it seems necessary to match all the 
mounting screw holes. Anyone else have any ideas.


By the way it seems surprising to me the amount of "missing" parts that 
customers are ordering for replacement.  I just built the K2 with the SSB 
module, Noise blanker module, DSB module and KPA100 module.  That calls for 
a lot of parts and I got to say that Christene always gets all the parts. 
In fact it seems that there is lots of extra hardware and wire in with the 
kits.  Many times I thought a part was messing only to find it after careful 
looking.


I also have to agree with Elecraft on the alignment.  If you take your time 
and read the procedures carefully you can do a real good alignment. The 
audio spectrum program that is offered really makes it easy to calibrate the 
BFO frequencies. I have been working with electronics for more then 40 years 
and I teach others to do the same. I cannot state enough to take your time 
and follow the procedures and your K2 is spot on frequency
Great Job Elecraft!! 


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[Elecraft] Goofed

2006-12-18 Thread Dave &amp; Jeanne Robertson

Bernie I goofed

It is 30 seconds  I told you 10 seconds by mistake.  I just teated it on my 
rig and it is really 30 seconds


Dave
KD1NA 


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[Elecraft] Freq Memory

2006-12-18 Thread Dave &amp; Jeanne Robertson

Bernie,
On My K2 (#5779) if I change frequency on the same band and wait for 10 
seconds the K2 puts that new frequency in memory so when the rig is powered 
off , then back on it returns to the frequency it was last on.  If you 
change the frequency within the same band and quickly power the rig off, it 
will return to the original frequency before the change was made.


Example:

If the rig was at 3760 KHZ and I changed the frequency to 3770 KHZ and 
waited 10 seconds before shutting the rig down it will return to 3770 KHZ 
when powered up.


If you quickly powered off the rig after the Frequency change the rig will 
be at 3760 KHZ when powered up.


Hope that clears up your question.

73
Dave KD1NA 


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[Elecraft] Your website

2006-12-15 Thread Dave &amp; Jeanne Robertson

Tom
Your website is great!! There is a wealth of information there and I have 
just started to learn from it.  I have just completed my K2 and am doing a 
lot of learning and enjoying the rig a lot.


One thing I might comment on is the Spectrogram program you offer a link to.

Well I needed to align my ssb filter and after downloading the software I 
could not get any audio from the rig to the application.  The K2 audio was 
getting into my computer and I could use MIXW to see and work PSK31 
stations.


So I tried using the spectrum scope in MIXW and it did the job fine. I could 
tweak the SSB filters for the best response using noise. I think Digipan 
will also work. You have to be careful on how to interpret the frequency 
markers but they are there.


Just thought I would pass this on

Thanks for a great source of information.

73
Dave KD1NA 


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[Elecraft] Solvent

2006-12-15 Thread Dave &amp; Jeanne Robertson
I have been working in electronics for over 30 years and I find that though 
rosin flux is somewhat inert under normal conditions it can lead to 
corrosion in certain circumstances. On all my portions of the K2 system I 
have built
I have removed the flux using alcohol or flux solvent. You have to be 
careful about certain plastics that could be affected by various cleaner 
solutions but most of today's components seem to resist any solvent damage 
if the proper flux removing solvents are used.


Be careful as the solvents can be flammable and not the greatest thing to 
breathe. Also be certain all the cleaner has been removed from the circuit 
board before applying power.


I hope this information is of some help.

73
Dave KD1NA 


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[Elecraft] Unstable VCO

2006-12-11 Thread Dave &amp; Jeanne Robertson

With stock construction (with C91, .001uf, C88, 68pf and RC15, 100uh choke
installed) I found instablity in the VCO from about 7175 to 7860 KHZ.
After contacting Elecraft I was told to remove RC15 and replace it with a
wire and shorten the leads of C88. The VCO instablity was still there.
After being advised to keep the leads short I cut any excess leads from all
the IC's that are in the VCO circuit. (Please note that all chips are
soldered in except the controller chip U1). this didn't help at all.
So I tried replacing the wire short where RFC 15 was, with a ferrite bead.
Now the instablity was only from 7800 to 7805 KHZ.
The next thing I tried was replacing C88 with a 100pf silver mica capacitor.
It is somewhar larger then the origonal capacitir but I managed to keep the
leads short. The VCO problem is now gone and the rig seems to work
flawlessly. I have been using it a lot on PSK and even had some ssb
contacts. I still got a lot to learn about the rig and the DSB module but
that will come with experiance. Thanks to all for your advice and
information.

Again, thanks to all,

73
Dave KD1NA



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[Elecraft] Problem With VCO Stablity

2006-12-10 Thread Dave &amp; Jeanne Robertson
When I operate my K2 between 7180 and 7190 Khz the VCO seems to worble or 
becomes unstable. Any other band or frequency is fine. I have removed RFC15 
and replaced it with a direct wire connection then later a ferrite bead. 
C91's value was increased from .001 uf to .01 uf. c*88 is still  68pf but 
with the advice of Elecraft Technical support I reduced the lead length of 
this component to as short as possable.  These changes seem to help reduce 
the bandwidth of instablity but not totally eliminate it.


The rig works fine on all bands and puts out 10+ watts.
Any suggestions

73
Dave KD1NA 


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[Elecraft] LCD Backing

2006-12-10 Thread Dave &amp; Jeanne Robertson

Tom,

I just finished building my electaft and I agree with you about the LCD 
display.  On mine there was a very thin clear plastic film that was easy to 
peel off but underneath the LCD module ewas a translucent plastic coating. 
I attempted to peel it off but it was rwally glewed on so I stopped trying. 
After i build the rig I found that the LCD lights up fine.  It seems the 
light gets into the LCD from the outside edges and not the back. Or there is 
so much led light that it makes it through the translucent coating on the 
back. If you don't fing the clear coating on the front don't worry as you 
probely wount see it after it is mounted.


743
Dave KD1NA 


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[Elecraft] Test Message

2006-12-10 Thread Dave &amp; Jeanne Robertson

I am trying again with another test message.
73
Dave KD1NA
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