date:20151022

Re: [Elecraft] K3S speaker vibration/whine

2015-10-22 Thread ae4pb

I've not gotten into it yet. My speaker has never been dropped but I'll check.

-Original Message-
From: Ron D'Eau Claire [mailto:r...@cobi.biz] 
Sent: Thursday, October 22, 2015 3:24 PM
To: ae...@carolinaheli.com; 'Randy Moore'
Cc: elecraft@mailman.qth.net
Subject: RE: [Elecraft] K3S speaker vibration/whine

That was my experience too, with an older K2 that uses the same speaker. The 
magnet is heavy enough to bend the speaker frame if it's handled too roughly. I 
dropped the top cover with speaker mounted onto a wooden floor. 

I confirmed the cause by gently moving the paper speaker cone with my fingers. 
If the frame is warped you can feel the voice coil rubbing on the magnet. I was 
able to repair the speaker by putting a blade screwdriver between the frame 
members and the magnet and twisting it slightly to move the magnet relative to 
the frame. It involved a bit of trial and error to determine which way the 
magnet needs to be moved so the voice coil stops rubbing but it's not 
difficult. That was about 8 years ago. The speaker has been fine ever since. 

That was without a shield on the speaker magnet but if you reach in to the 
magnet (just visible inside the shield) it should work with the shield in place.

73, Ron AC7AC 

-Original Message-
From: Jerry Moore [mailto:je...@carolinaheli.com] On Behalf Of 
ae...@carolinaheli.com
Sent: Thursday, October 22, 2015 10:13 AM
To: 'Ron D'Eau Claire'; 'Randy Moore'
Cc: elecraft@mailman.qth.net
Subject: RE: [Elecraft] K3S speaker vibration/whine

Yes, I found something about if the speaker frame gets warped it can affect the 
speaker cone. Maybe I over-tightened the speaker and have it warped. I'll take 
the cover off, remove the speaker and see what it sounds like without being 
installed. If that 'fixes" the issue then I'll investigate further. It's a 
minor thing but something I want to resolve.

Jerry Moore
CDXA, INDEXA, SKCC, Fists
AE4PB, K3S - S.N. 010324
http://www.qrz.com/db/AE4PB
An Amateur is - Considerate, Loyal, Progressive, Friendly, Balanced, and 
Patriotic.

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau 
Claire
Sent: Thursday, October 22, 2015 12:43 PM
To: 'Randy Moore'
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S speaker vibration/whine Are all the top screws in 
place, including the chassis stiffener bar that is mounted on the KPA3 shield 
and attaches to the top with three screws?
When assembled, there are no "vertical metal pieces that contact the top" that 
are not secured by screws. 
73, Ron AC7AC

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Re: [Elecraft] K3S speaker vibration/whine

2015-10-22 Thread Ron D'Eau Claire

That was my experience too, with an older K2 that uses the same speaker. The 
magnet is heavy enough to bend the speaker frame if it's handled too roughly. I 
dropped the top cover with speaker mounted onto a wooden floor. 

I confirmed the cause by gently moving the paper speaker cone with my fingers. 
If the frame is warped you can feel the voice coil rubbing on the magnet. I was 
able to repair the speaker by putting a blade screwdriver between the frame 
members and the magnet and twisting it slightly to move the magnet relative to 
the frame. It involved a bit of trial and error to determine which way the 
magnet needs to be moved so the voice coil stops rubbing but it's not 
difficult. That was about 8 years ago. The speaker has been fine ever since. 

That was without a shield on the speaker magnet but if you reach in to the 
magnet (just visible inside the shield) it should work with the shield in place.

73, Ron AC7AC 

-Original Message-
From: Jerry Moore [mailto:je...@carolinaheli.com] On Behalf Of 
ae...@carolinaheli.com
Sent: Thursday, October 22, 2015 10:13 AM
To: 'Ron D'Eau Claire'; 'Randy Moore'
Cc: elecraft@mailman.qth.net
Subject: RE: [Elecraft] K3S speaker vibration/whine

Yes, I found something about if the speaker frame gets warped it can affect the 
speaker cone. Maybe I over-tightened the speaker and have it warped. I'll take 
the cover off, remove the speaker and see what it sounds like without being 
installed. If that 'fixes" the issue then I'll investigate further. It's a 
minor thing but something I want to resolve.

Jerry Moore
CDXA, INDEXA, SKCC, Fists
AE4PB, K3S - S.N. 010324
http://www.qrz.com/db/AE4PB
An Amateur is - Considerate, Loyal, Progressive, Friendly, Balanced, and 
Patriotic.


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau 
Claire
Sent: Thursday, October 22, 2015 12:43 PM
To: 'Randy Moore'
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S speaker vibration/whine Are all the top screws in 
place, including the chassis stiffener bar that is mounted on the KPA3 shield 
and attaches to the top with three screws?
When assembled, there are no "vertical metal pieces that contact the top" that 
are not secured by screws. 
73, Ron AC7AC



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Re: [Elecraft] KRC2 rs232 to cpu not working

2015-10-22 Thread Byron Servies

Hi Gordon,

I recently, and finally, got to the point where I needed to set up
band maps in my KRC2. I also use PCIe serial cards and Windows 10 and
the problem I had was the cable. Once I built a cable using exactly
the pinouts in the KRC2 manual (instead of cables I had laying
around), it worked fine, as did the firmware update.

Sorry I cannot be of more help, but that is what worked for me.

73, Byron N6NUL

On Thu, Oct 22, 2015 at 5:38 AM, Gordon LaPoint
 wrote:
> Jack, and others that have sent advice
>
> I have the latest manual from the Elecraft website.  I have only
> followed the manual as far as testing the unit from the buttons on the unit,
> which works fine, and using the rs232 to computer using the latest Elecraft
> software to try to check/set the band map.  That I have not got working yet.
> The software never finds the KRC2 on the serial port.  I tried two
> computers, one using win7 the other using win10.  Both computers have pciE
> serial cards, NOT usb to serial.   Both computers talk to my K3 and KPA500
> just fine.
> I will try to work on it again this weekend and see what else I can come up
> with.
> I have double and triple checked the jumpers for proper setup for rs232
> setup, tried changing the baud rate, using all three. the KRC2 software can
> not see the unit.  I can check the serial lines with a scope to see if the
> signals are geting to the pic chip, but that will have to wait until the
> weekend.
>   Thanks for the help,
-- 
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org
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[Elecraft] K3:Erratic CW keying

2015-10-22 Thread Edward R Cole

I encountered an issue with remote keying my K3 via the straight key 
jack today.  After keying up for a test carrier and releasing the KEY 
line the radio repeatedly keyed up at about 2x per second for 
anywhere from three to ten times before stopping: 
kerchunk-kerchunk-kerchunk-kerchunk ...


I had a switch at the tower connected with two wires to the CW KEY 
jack in the house about 120-feet away.  Shorting the leads at the 
back of the K3 caused the same thing.  Figuring it might have 
something to do with my inhibit control I unplugged the connection to 
the ACC jack and also reset CONFIG: INH to OFF.  Still the same 
behavior so it had nothing to do with Inhibit.


Worrying that rapid TR keying might cause failure to my tower-mounted 
preamp, I tried using a different mode than CW.  Keying in USB and 
FM  showed normal TR action.  I finally figured I could remotely use 
the KEY IN jack to activate PTT in FM mode for keying a test carrier 
while out at the tower.  That worked fine.


Later this evening I restored connection of my CW straight key to the 
K3 and saw none of the issues seen earlier.  Since CW requires use of 
VOX I'm wondering if maybe the long key line introduced RFI into the 
CW KEY jack?  I was testing with 50w at 2m.  So curious if anyone has 
had similar experience with K3 acting up this way in CW mode.  No I 
was not jacked into the paddle jack.  I even adjusted CW speed with 
no affect (which one would expect using the straight key jack).


Is there a way to run CW without using VOX?  BTW I went thru all of 
the CONFIG settings to confirm they were in normal settings.  Mostly 
curious what was happening now that I have a work-around for remotely 
testing (SWR) while at the tower (using FM and KEY IN).


73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] K3 Received Signal Drops When Roofing Filter Switched In

2015-10-22 Thread Vic Rosenthal 4X6GP/K2VCO

I used the dBV function to match the filter gains so that there would be
no difference when switching filters. In my case I found it necessary to
set the 400 Hz filter gain to +5 dB. You can do it by ear, but either
way you need a steady signal. I used my little Elecraft XG1 to generate
a steady 1 uv signal.

Note that if you have the subreceiver, filter gains may need to be
different. The easiest way to set them is with the K3 utility.

Regarding the RX EQ, I don't use it at all on CW, because at narrow
bandwidths the pitches that you hear are determined by the width and
shift. If you like to listen to CW with 2 kHz bandwidth, then it might
be useful, but I don't.

You absolutely should NOT set the RX EQ to boost any frequencies on CW.
Just cut the ones you don't want. This is because the RX EQ is turned
off at bandwidths < 150 Hz. As a result, if you are boosting 400 Hz by 2
dB, then when you go to a narrow bandwidth the boost disappears --
exactly what you don't want!

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 22 Oct 2015 03:13, engineercm wrote:

Thanks to all that pointed me to the filter gain settings accessible with the
Utility. It was set at 2 db which is the recommended value in the K3
manual. Now that I know where the parameter is, I'll experiment more with
weak signals. The manual does not suggest going above 2 db claiming DSP
operation would be impaired in some way.

I've also concluded that the sharp drop in noise when the filter kicks in is
to be expected. I found the same instantaneous drop in noise with the 200
Hz filter is engaged. Not at all annoying; I was just trying to understand
this marvelous radio.

I'm primarily a CW op and will leave the Rx Eq set at +2db around the
sidetone frequencies and all others -10 or better. That seems to suit my
ears and my current operating skill.

73 de Clark WU4B

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