Re: [Elecraft] Re who would spend 30 hours building a k2?

[Robert G Strickland]

I think that building the K2 has to be an end in itself. I have more 
pictures of various pieces taped to colored construction paper than I do 
of the radio itself. Other pictures feature my method of winding 
toroids.  Then, at the end of building, you step over the "building 
finish line" to discover that you own one of the really great radios in 
the history of amateur radio. Then the operating fun begins.

...robert KE2WY

On 1/30/2018 23:23, Mel Farrer via Elecraft wrote:

Beyond that, the manuals are VERY detailed and for most part as complete as one 
could expect, HOWEVER, the builder needs to have the mental attitude to take a 
step back and think like you are just starting and reread and recheck every 
step. When you do, it IS a very rewarding experience and LOTS of FUN.
Mel, K6KBE

   From: Ron D'Eau Claire 
  To: 'W4EDN' ; elecraft@mailman.qth.net
  Sent: Tuesday, January 30, 2018 3:05 PM
  Subject: Re: [Elecraft] Re who would spend 30 hours building a k2?

If you are interested in building as well as operating it's a pleasant
experience. Just like a 10 mile hike, you do it one simple, easy step at a
time.

Those who seem to have had trouble just wanted a K2 to operate and tried to
put the kit together as quickly as possible without double-checking their
work at each step along the way.

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of W4EDN
Sent: Sunday, January 28, 2018 4:52 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Re who would spend 30 hours building a k2?

I bought a used k2 and just spent 12 hrs building a Kant-100.
The k2 looks like a bigger challenge .
Mine had the 100w amp included.
Bill

Sent from my iPod
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--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] KX3 Faulty SWR indication

[Peter Lambert]

The funny SWR also appears with the ATU in circuit but not at the tuning PWR 
level.  It appears when the rig is in "normal" transmit mode after tuning.  Bob 
is likely right though - try turning the power down and see if results in 
"normal" operation.  You may find it power dependent - if so it could be very 
hard to fix unless you're experienced and willing to solder and unsolder parts.

73's Peter VK4JD

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob McGraw K4TAX
Sent: Wednesday, 31 January 2018 11:38 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX3 Faulty SWR indication

Based on your description, I'd say there is some instability in one of the 
stages.   The dummy load will present a uniform impedance at all frequencies, 
thus the SWR will be 1:1.   output network will show evidence of reflected 
power.   Using the ATU, it adds filtering thus eliminating the spurious output. 
   I suggest looking at the output on a spectrum analyzer.

73

Bob, K4TAX


On 1/30/2018 7:09 PM, Dave Sublette wrote:
> A few weeks ago I posted this problem, worked on it a bit, then got 
> distracted into other projects.  I am now back trying to resolve the 
> faulty SWR issue with My KX3.  The problem only occurs on 160, 80 and 60 
> meters.
>
> Using a known good dummy load and cable the indicated SWR on the KX3 
> is high --- 1.8 to one using 10 watts.  An external wattmeter/SWR 
> meter shows the Dummy Load as a perfect load.  The reflected power needle 
> does not move.
>
> I have done repeated Power Out Calibrations with the KXPA100 (not 
> relevant, I know).  The KX3 shows the same faulty SWR Readings with or 
> without the KXPA100.  Of course the ATU mode is in bypass.  But, when 
> the ATU is active, it matches, shows a proper SWR briefly, then shows 
> the faulty reading as the rig transmits.
>
> It was a factory built unit S/N 4932.
>
> I'm stumped.  I guess it is time to send it home for healing.
>
> Dave, K4TO
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Re: [Elecraft] KX3 Faulty SWR indication

[Bob McGraw K4TAX]

Based on your description, I'd say there is some instability in one of 
the stages.   The dummy load will present a uniform impedance at all 
frequencies, thus the SWR will be 1:1.   output network will show 
evidence of reflected power.   Using the ATU, it adds filtering thus 
eliminating the spurious output.    I suggest looking at the output on a 
spectrum analyzer.


73

Bob, K4TAX


On 1/30/2018 7:09 PM, Dave Sublette wrote:

A few weeks ago I posted this problem, worked on it a bit, then got
distracted into other projects.  I am now back trying to resolve the faulty
SWR issue with My KX3.  The problem only occurs on 160, 80 and 60 meters.

Using a known good dummy load and cable the indicated SWR on the KX3 is
high --- 1.8 to one using 10 watts.  An external wattmeter/SWR meter shows
the Dummy Load as a perfect load.  The reflected power needle does not move.

I have done repeated Power Out Calibrations with the KXPA100 (not relevant,
I know).  The KX3 shows the same faulty SWR Readings with or without the
KXPA100.  Of course the ATU mode is in bypass.  But, when the ATU is
active, it matches, shows a proper SWR briefly, then shows the faulty
reading as the rig transmits.

It was a factory built unit S/N 4932.

I'm stumped.  I guess it is time to send it home for healing.

Dave, K4TO
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Re: [Elecraft] Re who would spend 30 hours building a k2?

[Mel Farrer via Elecraft]

Beyond that, the manuals are VERY detailed and for most part as complete as one 
could expect, HOWEVER, the builder needs to have the mental attitude to take a 
step back and think like you are just starting and reread and recheck every 
step. When you do, it IS a very rewarding experience and LOTS of FUN.
Mel, K6KBE

  From: Ron D'Eau Claire 
 To: 'W4EDN' ; elecraft@mailman.qth.net 
 Sent: Tuesday, January 30, 2018 3:05 PM
 Subject: Re: [Elecraft] Re who would spend 30 hours building a k2?
   
If you are interested in building as well as operating it's a pleasant
experience. Just like a 10 mile hike, you do it one simple, easy step at a
time. 

Those who seem to have had trouble just wanted a K2 to operate and tried to
put the kit together as quickly as possible without double-checking their
work at each step along the way. 

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of W4EDN
Sent: Sunday, January 28, 2018 4:52 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Re who would spend 30 hours building a k2?

I bought a used k2 and just spent 12 hrs building a Kant-100.
The k2 looks like a bigger challenge .
Mine had the 100w amp included.
Bill

Sent from my iPod
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[Elecraft] 2018 Visalia Top Band Dinner

[wb6rse1]

Announcing the Top Band Dinner at the 2018 Visalia International DX Convention.

Self-serve Buffet Dinner. Pre-Assigned seating. Door Prizes. $42/person. 

Program: "Overview of the N5IA 160m 8-Circle Antenna," by Lee Finkel, KY7M and 
"Top Band from Bouvet, 3YØZ" by Glenn Johnson, WØGJ. 

For the most up to date information and to register see:  
http://topbanddinner.jimdo.com/ 


73 - Steve WB6RSE
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[Elecraft] am i missing something?

[bill]

Even though I have one, I didn't build it, so I would love to find an unbuilt 
KX1. 

Today, one came up on one of the ham swap lists. The asking price? "$1500 or a 
new KX3"  ... am I missing something or is this a very very optimistic seller?

very puzzled 73 de bill K7WXW

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Re: [Elecraft] Re who would spend 30 hours building a k2?

[Ron D'Eau Claire]

If you are interested in building as well as operating it's a pleasant
experience. Just like a 10 mile hike, you do it one simple, easy step at a
time. 

Those who seem to have had trouble just wanted a K2 to operate and tried to
put the kit together as quickly as possible without double-checking their
work at each step along the way. 

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of W4EDN
Sent: Sunday, January 28, 2018 4:52 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Re who would spend 30 hours building a k2?

I bought a used k2 and just spent 12 hrs building a Kant-100.
The k2 looks like a bigger challenge .
Mine had the 100w amp included.
Bill

Sent from my iPod
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[Elecraft] Selectivity

[Roger D Johnson]

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[Elecraft] Selectivity

[Roger D Johnson]

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Re: [Elecraft] K3 selectivity positions

[Bob McGraw K4TAX]

Did I miss something or was no message content sent?

73

Bob, K4TAX


On 1/30/2018 11:25 AM, Roger D Johnson wrote:

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Re: [Elecraft] K3 Switches Number of Speakers

[Chester Latawiec]

Yes.  I've noticed that as well, in that it occurred when a loud signal popped 
into the passband!  My AGC is always on with the affected K3.

That makes two of us.

So I now suspect that there is a common menu setting or front panel setting or 
firmware setting that is causing this.  I was afraid my vintage K3 was dying!


73

Chet VE3CFK



From: elecraft-boun...@mailman.qth.net  on 
behalf of Mike Cox 
Sent: January 30, 2018 12:32 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Switches Number of Speakers

My k3s occasionally does this too. I finally isolated the problem
initiator as a burst of very loud signals, such as occurs when listening
to a very weak DX station when a very strong (speaker rattling) station
plops on top of him followed by the loud frequency cops. The Sub Rx must
be is on and the volume for Main Rx is cranked up for the weak station.
A single loud signal does not appear to initiate the SPKRS parameter
change. It appears to only happen with multiple loud signals in the
passband. These signals will be loud enough that I turn down the volume
very quickly. During this loud outburst, the SPKR config will change to
"1". I have set up a macro button to toggle the SPKRS configuration so
that I can quickly return it to "2". If I turn the volume down a bit, it
doesn't do this so I'm wondering if there's some "safety" mechanism
built into the audio driver control circuit/firmware. Is it due to
mixing of close frequency audio signals in a non-linear audio amp
(clipping mode) producing sub-audible products? I don't know, it's just
a thought. It's only an occasional annoyance for me so I've never
pursued a cure.

My AF LIM parameter is currently set at 30 but I seldom have AGC off. It
does it with AF GAIN "HI" or "LO" but if the gain is set "LO", I must
turn the volume knob up more to compensate so I end up listening at the
same relative audio levels. I'm running LP Bridge and at least one
logging program and a K-Pod but have no other macros that directly deal
with the SPKRS parameters. My sub Rx card is an older version retrieved
from my original K3.

A cure or a work-around would be nice,

Mike, AB9V


On 1/30/2018 11:21 AM, Chester Latawiec wrote:
> My old K3 occasionally switches from 2 speakers to 1 speaker (makes it really 
> tough to listen split chasing DX)!
>
>
> Any ideas what may be causing this?
>
>
> 73
>
> Chet VE3CFK
>
>
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Re: [Elecraft] K3 Switches Number of Speakers

[Mike Cox]

My k3s occasionally does this too. I finally isolated the problem 
initiator as a burst of very loud signals, such as occurs when listening 
to a very weak DX station when a very strong (speaker rattling) station 
plops on top of him followed by the loud frequency cops. The Sub Rx must 
be is on and the volume for Main Rx is cranked up for the weak station. 
A single loud signal does not appear to initiate the SPKRS parameter 
change. It appears to only happen with multiple loud signals in the 
passband. These signals will be loud enough that I turn down the volume 
very quickly. During this loud outburst, the SPKR config will change to 
"1". I have set up a macro button to toggle the SPKRS configuration so 
that I can quickly return it to "2". If I turn the volume down a bit, it 
doesn't do this so I'm wondering if there's some "safety" mechanism 
built into the audio driver control circuit/firmware. Is it due to 
mixing of close frequency audio signals in a non-linear audio amp 
(clipping mode) producing sub-audible products? I don't know, it's just 
a thought. It's only an occasional annoyance for me so I've never 
pursued a cure.


My AF LIM parameter is currently set at 30 but I seldom have AGC off. It 
does it with AF GAIN "HI" or "LO" but if the gain is set "LO", I must 
turn the volume knob up more to compensate so I end up listening at the 
same relative audio levels. I'm running LP Bridge and at least one 
logging program and a K-Pod but have no other macros that directly deal 
with the SPKRS parameters. My sub Rx card is an older version retrieved 
from my original K3.


A cure or a work-around would be nice,

Mike, AB9V


On 1/30/2018 11:21 AM, Chester Latawiec wrote:

My old K3 occasionally switches from 2 speakers to 1 speaker (makes it really 
tough to listen split chasing DX)!


Any ideas what may be causing this?


73

Chet VE3CFK


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[Elecraft] K3 selectivity positions

[Roger D Johnson]

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Re: [Elecraft] Wrong PIM nuts in KPA500 kit

[Michael Blake]

I received a call back from Elecraft Technical Support yesterday.  It was quite 
difficult to come together on exactly which screws and embedded PEM nuts I was 
talking about in the bottom cover.  Once we were in agreement on the screw 
positions I was talking about the technician looked at a bottom cover but was 
unable to determine the exact thread sizes as he was unwilling to remove the 
green protective tape which covered the holes.  He was not really equipped to 
handle this mechanical sheet metal problem but was going to refer it to another 
group which could more easily address the problem.  I initially got the 
impression that he thought that I was incorrect about the threaded nut (PEM 
nuts)  error but I think we got past that.

For clarification, if you have a new kit and would check, these are the steps 
where the problems arise:

These are the steps in the Kit Assembly Instructions

Page 15, figure 14 show six (6) 1/4" 6-32 BLACK FLAT HEAD SCREWS. The right 
hand two (2) 6-32 screw locations were equipped with 4-40 threaded nut inserts (PEM 
nuts) rather than the correct 6-32 threaded inserts (PEM nuts).  The two (2) 4-40 
BLACK FLAT HEAD SCREW shown in this figure were correctly equipped with 4-40 
threaded inserts (PEM nuts).

The same problem exists on the right hand side cover.

Page 24, figure 32 instructs you to install four (4) 6-32 BLACK FLAT HEAD 
SCREWS.  In this case the two rear 6-32 screw locations were equipped with the 
correct 6-32 threaded inserts (PEM  nuts) but the front two locations were 
equipped with 4-40 threaded inserts (PEM nuts).

At this point I am waiting to see what they find when they check their current 
supply of bottom covers and what their recommendation will be to correct the 
problem.

I do have a photo but I do not believe I can attach it to the reflector.

Michael Blake
k9...@mac.com

On Jan 27, 2018, at 11:06 AM, Michael Blake  wrote:

I am waiting on a response from Elecraft TS on this one but I thought I would 
ask if anyone else has encountered this problem on the KPA500 kit.

On the bottom edge of both the right and left side panels there are places for 
three 6-32 flat head screws. The countersunk holes are obviously larger than 
those for the other 4-40 flat head screws.

In my kit one of the three PIM nuts, for each side, was the correct 6-32 thread 
PIM nut and the remaining two had 4-40 PIM nuts installed in the bottom cover. 
When I had temporarily installed the left hand side panel in the middle of 
construction I failed to notice this and just installed screws that fit (one 
6-32 and two 4-40) but during final assembly it became obvious that the 6-32 
screws would not fit in 4 of the 6 positions.

Thinking that they just had paint in them I tried tp run a 6-32 tap through one 
and it naturally seized up and twisted the PIM nut out. Not being the brightest 
bulb in the shop I tried that a second time and twisted out the second PIM nut.

Fortunately these were both on the right hand side where there was room to slip 
two 6-32 hex nuts in place and I just used two 4-40 flat head screws on the 
left side.

Hopefully Elecraft will be able to send me the correct PIM nuts to replace the 
four incorrect ones. That was my request in the email to Doug at tech support.

I certainly would not want to replace the bottom coverl as that would require a 
complete disassembly of the amplifier.

Has anyone else encountered this?

Michael Blake
k9...@mac.com

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[Elecraft] K3 Switches Number of Speakers

[Chester Latawiec]

My old K3 occasionally switches from 2 speakers to 1 speaker (makes it really 
tough to listen split chasing DX)!


Any ideas what may be causing this?


73

Chet VE3CFK


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