Re: [Elecraft] circuit breaker

[Scott Ellington]

Todd,

Was the K3 in receive or transmit mode when it went dead?

73,

Scott  K9MA

On 5/16/2016 20:58, Richard Fjeld wrote:
I have seen breakers let go for no apparent reason. It seemed like it 
was a mechanical failure in the breaker.


Dick, n0ce


On 5/16/2016 5:27 PM, Rick Bates (WA6NHC) wrote:
Is it possible that it 'belched' and the power reset is what really 
fixed it?


73,
Rick WA6NHC

Tiny iPhone keypad, spell check happens


On May 16, 2016, at 1:40 PM, Todd Ruby  wrote:

Well Ron, I guess there's a first time for everything. Although the 
radio was deaf and dumb, I had display function and it looked as it 
normally does after turning on the power. There was just no receive 
nor output power.


I turned it off, pressed the 20 amp circuit breaker on the rear 
panel and sigs were coming through the headphones and I had full power.


Today it's also operating perfectly.

73

Todd


On May 16, 2016, at 3:30 PM, Ron D'Eau Claire  wrote:

Todd responded to me off the reflector that he lost all power to 
the K3 so it wasn’t the 20A breaker. That only controls power to 
the KPA3. The front panel is still powered and the receiver 
continues to work.


I suggested it might be the self-resetting breaker inside the K3. 
That will turn it off completely. Actually power will still be on 
the KPA3 module and anything plugged into the 12V external power 
connector on the K3 rear panel, but the K3 itself will look dead 
with no front panel lights, receive or other functions until it 
cools and resets itself.


I’ve never had an issue with either breaker opening unexpectedly.

73, Ron AC7AC

From: a...@sbcglobal.net [mailto:a...@sbcglobal.net]
Sent: Monday, May 16, 2016 12:18 PM
To: Ron D'Eau Claire; 'todd ruby'; 'Elecraft Reflector Reflector'
Subject: Re: [Elecraft] circuit breaker

I believe Todd is referring to the breaker on the K3, not his house 
panel circuit?
Ron has some good advice, but I wonder how common this circuit 
breaker operates?


I looked thru my manual for more info on it.  The block diagram 
shows it as a 25A fuse,
text and device indicate 20A circuit breaker, but NO  info on the 
type operating curve, or current vs. time for minimum trip?


I have a 10A circuit breaker on my 40Ahr battery supply and it has 
never tripped.  It is a thermal time delay like most house breakers.


Anyone out there have any clue?   Wayne?

Mike  AC5P



On Monday, May 16, 2016 12:28 PM, Ron D'Eau Claire  
wrote:



The normal underlying cause for the breaker to open is 
over-current. That's
a 20A breaker that protects only the KPA3 100 watt amplifier 
module. The
first thing I'd do is check the current drain from your power 
supply on the
band where you experienced the problem. First set the power to 10 
watts so
the KPA3 is bypassed and note the total current drain key down. Now 
crank up
the power and see if the part used by the KPA3 is pushing 20A. For 
example,
if your total current at 10 W was 3A, does the total at 100 watts 
approach
23A? IF so, the breaker was simply doing its job. Note that circuit 
breakers
are not precision devices so it may trip a couple of amperes one 
way or the

other from 20A.

A primary reason for excessive KPA3 current is a high SWR on your 
antenna
system. The higher the SWR, the less efficient the KPA3 becomes and 
the more

current it has to draw to produce the power.

A defective breaker can also start tripping at lower currents.

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf 
Of todd

ruby
Sent: Monday, May 16, 2016 9:08 AM
To: Elecraft Reflector Reflector
Subject: [Elecraft] circuit breaker

Would anyone venture to guess what would cause the circuit breaker 
to trip

on a K3? Mine did all of a sudden yesterday. Fortunately, my friend
suggested the reset and voila, I am back on the air. But if there 
is an

underlying cause, I think it would be wise to be aware of it so as to
preclude this episode from repeating. Any thoughts are welcome.

73

todd

WB2ZAB

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Post: 

Re: [Elecraft] circuit breaker

[Richard Fjeld]

I have seen breakers let go for no apparent reason.  It seemed like it 
was a mechanical failure in the breaker.


Dick, n0ce


On 5/16/2016 5:27 PM, Rick Bates (WA6NHC) wrote:

Is it possible that it 'belched' and the power reset is what really fixed it?

73,
Rick WA6NHC

Tiny iPhone keypad, spell check happens


On May 16, 2016, at 1:40 PM, Todd Ruby  wrote:

Well Ron, I guess there's a first time for everything. Although the radio was 
deaf and dumb, I had display function and it looked as it normally does after 
turning on the power. There was just no receive nor output power.

I turned it off, pressed the 20 amp circuit breaker on the rear panel and sigs 
were coming through the headphones and I had full power.

Today it's also operating perfectly.

73

Todd


On May 16, 2016, at 3:30 PM, Ron D'Eau Claire  wrote:

Todd responded to me off the reflector that he lost all power to the K3 so it 
wasn’t the 20A breaker. That only controls power to the KPA3. The front panel 
is still powered and the receiver continues to work.

I suggested it might be the self-resetting breaker inside the K3. That will 
turn it off completely. Actually power will still be on the KPA3 module and 
anything plugged into the 12V external power connector on the K3 rear panel, 
but the K3 itself will look dead with no front panel lights, receive or other 
functions until it cools and resets itself.

I’ve never had an issue with either breaker opening unexpectedly.

73, Ron AC7AC

From: a...@sbcglobal.net [mailto:a...@sbcglobal.net]
Sent: Monday, May 16, 2016 12:18 PM
To: Ron D'Eau Claire; 'todd ruby'; 'Elecraft Reflector Reflector'
Subject: Re: [Elecraft] circuit breaker

I believe Todd is referring to the breaker on the K3, not his house panel 
circuit?
Ron has some good advice, but I wonder how common this circuit breaker operates?

I looked thru my manual for more info on it.  The block diagram shows it as a 
25A fuse,
text and device indicate 20A circuit breaker, but NO  info on the type 
operating curve, or current vs. time for minimum trip?

I have a 10A circuit breaker on my 40Ahr battery supply and it has never 
tripped.  It is a thermal time delay like most house breakers.

Anyone out there have any clue?   Wayne?

Mike  AC5P



On Monday, May 16, 2016 12:28 PM, Ron D'Eau Claire  wrote:


The normal underlying cause for the breaker to open is over-current. That's
a 20A breaker that protects only the KPA3 100 watt amplifier module. The
first thing I'd do is check the current drain from your power supply on the
band where you experienced the problem. First set the power to 10 watts so
the KPA3 is bypassed and note the total current drain key down. Now crank up
the power and see if the part used by the KPA3 is pushing 20A. For example,
if your total current at 10 W was 3A, does the total at 100 watts approach
23A? IF so, the breaker was simply doing its job. Note that circuit breakers
are not precision devices so it may trip a couple of amperes one way or the
other from 20A.

A primary reason for excessive KPA3 current is a high SWR on your antenna
system. The higher the SWR, the less efficient the KPA3 becomes and the more
current it has to draw to produce the power.

A defective breaker can also start tripping at lower currents.

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of todd
ruby
Sent: Monday, May 16, 2016 9:08 AM
To: Elecraft Reflector Reflector
Subject: [Elecraft] circuit breaker

Would anyone venture to guess what would cause the circuit breaker to trip
on a K3? Mine did all of a sudden yesterday. Fortunately, my friend
suggested the reset and voila, I am back on the air. But if there is an
underlying cause, I think it would be wise to be aware of it so as to
preclude this episode from repeating. Any thoughts are welcome.

73

todd

WB2ZAB

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Message delivered 

Re: [Elecraft] [K2] External amplifier keying circuit question

[Steve Kavanagh via Elecraft]

Thanks, Don.  Good point re the input side...I guess I'm not used to having 
plug-in boards in mind! 

Yes, I was thinking of a pair of 2N7000s - they are fine for the current and 
voltage I need to switch.

73,
Steve VE3SMA

   
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Re: [Elecraft] [K2] External amplifier keying circuit question

[Matt Maguire]

I did a bit of a write-up when I added the keying circuit to my K2 (based on 
the article on the Elecraft website), hopefully you find it 
useful:http://www.mwrs.org.au/2014/04/20/elecraft-k2-amplifier-keying-circuit/
73, Matt VK2RQ




On Mon, May 16, 2016 at 7:03 AM -0700, "Steve Kavanagh via Elecraft" 
 wrote:










 I'm planning to add an external amplifier/transverter keying circuit to one of 
my K2s.  I found two versions on the web, both apparently designed by N0SS 
(SK).  The one on the Elecraft site 
(http://www.elecraft.com/Apps/Amp_keying_ckt.htm ) appears to be his original 
circuit, using a 2N7000 driving a 2N.  The archive of Tom's later kit 
offering (http://www.mmccs.com/mmarc/n0ss/k2_t-r_rly_drvr.pdf ) uses two 
MOSFETs and is capable of keying somewhat higher voltage and current.  But also 
he added a 100k resistor from the input gate (8R) to ground and another from 
the gate of the second MOSFET to ground.
I am trying to figure out if these two 100 k resistors serve any useful purpose 
or if I can happily leave them both out of the 2-MOSFET circuit.  There doesn't 
immediately appear to be any need to pull these gates down as there are several 
loads on the input 8R voltage (on the K2 RF board) which will do that for the 
1st MOSFET, and the 1st MOSFET will pull down the gate of the 2nd one when 
needed.  Maybe something odd will happen on power-up or power-down?
Any thoughts?
73,Steve VE3SMA
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Re: [Elecraft] circuit breaker

[Rick Bates (WA6NHC)]

Is it possible that it 'belched' and the power reset is what really fixed it?

73,
Rick WA6NHC

Tiny iPhone keypad, spell check happens

> On May 16, 2016, at 1:40 PM, Todd Ruby  wrote:
> 
> Well Ron, I guess there's a first time for everything. Although the radio was 
> deaf and dumb, I had display function and it looked as it normally does after 
> turning on the power. There was just no receive nor output power. 
> 
> I turned it off, pressed the 20 amp circuit breaker on the rear panel and 
> sigs were coming through the headphones and I had full power. 
> 
> Today it's also operating perfectly. 
> 
> 73
> 
> Todd
> 
>> On May 16, 2016, at 3:30 PM, Ron D'Eau Claire  wrote:
>> 
>> Todd responded to me off the reflector that he lost all power to the K3 so 
>> it wasn’t the 20A breaker. That only controls power to the KPA3. The front 
>> panel is still powered and the receiver continues to work.
>> 
>> I suggested it might be the self-resetting breaker inside the K3. That will 
>> turn it off completely. Actually power will still be on the KPA3 module and 
>> anything plugged into the 12V external power connector on the K3 rear panel, 
>> but the K3 itself will look dead with no front panel lights, receive or 
>> other functions until it cools and resets itself.
>> 
>> I’ve never had an issue with either breaker opening unexpectedly.
>> 
>> 73, Ron AC7AC
>> 
>> From: a...@sbcglobal.net [mailto:a...@sbcglobal.net] 
>> Sent: Monday, May 16, 2016 12:18 PM
>> To: Ron D'Eau Claire; 'todd ruby'; 'Elecraft Reflector Reflector'
>> Subject: Re: [Elecraft] circuit breaker
>> 
>> I believe Todd is referring to the breaker on the K3, not his house panel 
>> circuit?
>> Ron has some good advice, but I wonder how common this circuit breaker 
>> operates? 
>> 
>> I looked thru my manual for more info on it.  The block diagram shows it as 
>> a 25A fuse,
>> text and device indicate 20A circuit breaker, but NO  info on the type 
>> operating curve, or current vs. time for minimum trip?
>> 
>> I have a 10A circuit breaker on my 40Ahr battery supply and it has never 
>> tripped.  It is a thermal time delay like most house breakers.
>> 
>> Anyone out there have any clue?   Wayne? 
>> 
>> Mike  AC5P
>> 
>> 
>> 
>> On Monday, May 16, 2016 12:28 PM, Ron D'Eau Claire  wrote:
>> 
>> 
>> The normal underlying cause for the breaker to open is over-current. That's
>> a 20A breaker that protects only the KPA3 100 watt amplifier module. The
>> first thing I'd do is check the current drain from your power supply on the
>> band where you experienced the problem. First set the power to 10 watts so
>> the KPA3 is bypassed and note the total current drain key down. Now crank up
>> the power and see if the part used by the KPA3 is pushing 20A. For example,
>> if your total current at 10 W was 3A, does the total at 100 watts approach
>> 23A? IF so, the breaker was simply doing its job. Note that circuit breakers
>> are not precision devices so it may trip a couple of amperes one way or the
>> other from 20A. 
>> 
>> A primary reason for excessive KPA3 current is a high SWR on your antenna
>> system. The higher the SWR, the less efficient the KPA3 becomes and the more
>> current it has to draw to produce the power. 
>> 
>> A defective breaker can also start tripping at lower currents. 
>> 
>> 73, Ron AC7AC
>> 
>> -Original Message-
>> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of todd
>> ruby
>> Sent: Monday, May 16, 2016 9:08 AM
>> To: Elecraft Reflector Reflector
>> Subject: [Elecraft] circuit breaker
>> 
>> Would anyone venture to guess what would cause the circuit breaker to trip
>> on a K3? Mine did all of a sudden yesterday. Fortunately, my friend
>> suggested the reset and voila, I am back on the air. But if there is an
>> underlying cause, I think it would be wise to be aware of it so as to
>> preclude this episode from repeating. Any thoughts are welcome.
>> 
>> 73
>> 
>> todd
>> 
>> WB2ZAB
>> 
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>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to a...@sbcglobal.net
>> 
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Post: 

Re: [Elecraft] Buy kits

[Ken Arck]

I just ordered my K3S kit over the weekend. Hopefully it will ship 
before you guys leave for Dayton!


Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete repeater packages!
AH6LE/R - IRLP Node 3000
http://www.irlp.net
"We don't just make 'em. We use 'em!"

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Re: [Elecraft] Travel Case for K3

[Pete Gladysz via Elecraft]

I utilize a Pelican 1510 which is considered a FAA Roller.  It's interior
dimensions are 19.75x11x7.6".
I designed a foam package utilizing high density polyethylene which provides
protection for all the knobs and the fans. The Package carries a K3, MFJ
4125 Power Supply, Heil ProSet Headset, footswitch, bag for misc. wiring and
connectors and the K3 Manual. Total weight is 30 Pounds which is critical
for small airlines.  Picture attached

Pete K8PGJ

 



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/Travel-Case-for-K3-tp7617430p7617511.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] K3 NB Success in NB !

[Mike Smith VE9AA]

YAY!  With a little coaxing from the guys on this list and others, I felt
very brave and partially disassembled the radio and reseated the KNB3 board
and reinstalled.

No luck. Same symptoms.

Phooey !

 

So I decided to go for broke and swap the KNB3's between the main and sub
receivers.  Looking at the manuals, it didn't look to be too bad (I did it
twice actually)

and found that now both the main and the sub receivers work with the
IF-NB's.

 

I do note something a little odd, in that when I turn up the IF-NB settings
on the sub-rx (which now has the questionable board) that sometimes I get a
frying sound.

It's repeatable.  I also saw that once and only once on the main RX with IF
NB engaged.  Maybe that's what it's supposed to do if it's maxxed out.

 

I haven't had a real solid test, but just ran it through a few bands and a
few different settings,(just a few minutes) so by all means I don't have it
dialed in, but when an electric fence pop goes from a solid s5 to perhaps an
s0-s1 I can tell it's working. (before, almost nothing was happening)

 

Also, no more flashing NB on either the main or sub receiver. (so far,
anyways)

 

Thanks everyone - couldn't have done it w/o you.

 

I hope that's it for now.  The SUB-RX is not exactly "easy" to come out.
(especially since I wasn't the one to put it in, nor had I ever had a K3
apart.

 

What a great group here.

 

dit dit

 

Mike VE9AA "NB" (hi)

 

 

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

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[Elecraft] Elecraft Phones Back Up

[Eric Swartz - WA6HHQ, Elecraft]

We had a serious phone system problem this morning and just now got our phone 
system back on-line. If you called today or over the weekend and did not get an 
answer, or if you left a message and did not receive a call back, please call in 
again.


We apologize for the inconvenience. We are watching the system closely and 
hopefully we are now in good shape.


73,

Eric
/elecraft.com/

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Re: [Elecraft] K3 NB

[Nr4c]

Be sure if try to test before putting the KRX3 back in that you check the KRX3 
install directions and replace the small jumper in the socket where the rear 
"extender" board goes. Else the radio won't turn on



Sent from my iPhone
...nr4c. bill


> On May 16, 2016, at 4:39 PM, N2TK, Tony  wrote:
> 
> Mike,
> They can be swapped. You need to take out the second receiver to get to  the
> one on the main rf board. One screw takes each one out. Make sure on the rf
> board that there are two lockwashers between the NB standoff and the rf
> board.
> Take the screw out and the bard pulls out. Swap them and put it back
> together. See if you swapped the problem.
> 
> 73,
> N2TK, Tony 
> 
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike
> Smith VE9AA
> Sent: Monday, May 16, 2016 4:15 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 NB
> 
> Just found it.  Tony, N2TK asked about the 2nd rx.  Good on ya Tony.At
> least I am making headway.
> 
> 
> 
> Can the KNB3's be swapped guys or is there a lot more to it?
> 
> 
> 
> Mike VE9AA
> 
> 
> 
> Mike, Coreen & Corey
> 
> Keswick Ridge, NB
> 
> 
> 
> From: Mike Smith VE9AA [mailto:ve...@nbnet.nb.ca]
> Sent: May 16, 2016 5:08 PM
> To: 'elecraft@mailman.qth.net'
> Subject: K3 NB
> 
> 
> 
> I wish I could find the email from this weekend from the fellow who asked me
> if the NB works on the 2nd receiver.
> 
> I hadn't used the 2nd receiver really much at all (only had the rig a few
> days) and was hesitant to play with it until I learned a little more about
> the rig in general.
> 
> 
> 
> Anyways - an AHA! -moment.  The IF Noise Blanker actually works pretty well
> on the 2nd receiver.  So, that leads me to believe that there's something
> about the primary rx that is not quite right.
> 
> 
> 
> Are there two KNB3 blanker boards in an early K3 with two receivers?
> 
> 
> 
> Can I revert the firmware back to 4.83 (I saved it to a folder before
> upgrading to the latest) and see if somehow the blanker was maybe shut off,
> then turn it back on, then re: upgrade the firmware?
> 
> 
> 
> I just knew there was something up!
> 
> 
> 
> BTW, it was only the first day I had the radio that I heard relays clickity
> clacking when I had the NB engaged.  Now I just transmit once or twice, and
> the NB letters flash. (no relay noise)
> 
> 2nd receiver NB seems fine.
> 
> 
> 
> Is it easy to find the KNB3 board(s) ?
> 
> 
> 
> Tnx to whoever it was who asked about that.(kudos and give yourself a pat on
> the back) - you were the only one in 25+ ops to suggest that).
> 
>  At least now I know the NB does in fact WORK in these Elecraft beasts..but
> only in my 2nd RX.
> 
> 
> 
> Mike VE9AA
> 
> 
> 
> Mike, Coreen & Corey
> 
> Keswick Ridge, NB
> 
> 
> 
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Re: [Elecraft] Buy kits

[Don Wilhelm]

Tony,

You can order one at Dayton, configured to your requirements. There will 
be several there who can help you configure it (options and filters) to 
best suit your operating preferences and station needs.  The usual "show 
special" includes free shipping to any US address (except for the 
KPA500), and you will not have to pay Ohio sales tax.  Of course if you 
are in California, you will have to pay their sales tax.  Other states, 
no sales tax will be charged, and you will have to 'deal with' your own 
state for the sales tax on your own.


BTW: Maybe it was a slip of the finger on your iPad, but don't go to 
Daytona (that is in Florida) - the hamvention is in Dayton, Ohio.


73,
Don W3FPR


On 5/16/2016 5:18 PM, Tony Rowland wrote:

Can you buy aK3s kit with all the bells an whistles at Daytona?

Sent from my iPad
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Re: [Elecraft] Buy kits

[Phil Wheeler]

Or do you mean Dayton?

Phil W7OX


On 5/16/16 2:18 PM, Tony Rowland wrote:

Can you buy aK3s kit with all the bells an whistles at Daytona?

Sent from my iPad




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[Elecraft] Buy kits

[Tony Rowland]

Can you buy aK3s kit with all the bells an whistles at Daytona?

Sent from my iPad
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Re: [Elecraft] Funny audio output in kx3

[Don Wilhelm]

Penna,

Is there any chance that you have AFX turned on?  If the delay is set 
too high, the sound in the headphones (or external stereo amplifier) 
will have a "ghost-like" quality to it.  Since the internal speaker is 
only one channel, that effect will not be heard (AFX requires stereo 
output).


73,
Don W3FPR

On 5/16/2016 4:51 PM, Pentti A J Pajunen wrote:

Hi'ya all!

Have any of You bumped with a phenomenon of KX3's audio output when 
using headphones or xternal speaker with amplifier (TBA 820), sounding 
like ghost-like space sound. This phenomenon doesn't xist when my rigs 
own internal speaker is in use. The funny sound gives me an expression 
of leak of sampling glitches from the processor. Is there some kind of 
possibility of bad or broken grounding inside the rig. Unsuitable 
input impedance of the external spkr amp, or bad headphones?


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[Elecraft] Funny audio output in kx3

[Pentti A J Pajunen]

Hi'ya all!

Have any of You bumped with a phenomenon of KX3's audio output when 
using headphones or xternal speaker with amplifier (TBA 820), sounding 
like ghost-like space sound. This phenomenon doesn't xist when my rigs 
own internal speaker is in use. The funny sound gives me an expression 
of leak of sampling glitches from the processor. Is there some kind of 
possibility of bad or broken grounding inside the rig. Unsuitable input 
impedance of the external spkr amp, or bad headphones?

My K3 once sounded alike, but was healed by upgrading the software.

Any ideas for fixing?

73 & CU
Penna OH2G, OH2CG
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Re: [Elecraft] K3 NB

[Don Wilhelm]

Mike,

Good work to have discovered where the problem lies.  You might want to 
obtain a new KNB3 board and simply replace the one in the mainRX.


Yes, you can swap the KNB3 between the main and the sub, so if you want ---

Look in the K3 assembly manual as well as the KRX3 manual to see where 
they are plugged in - as well as how to remove the KRX3 to get at the 
KNB3 board on the main board.


The process is:
Remove the top cover
Remove the KRX3 assembly
Take the top cover off the KRX3 and remove the KNB3
Remove the KNB3 from the main and put it in the KRX3 (the top cover can 
now go on)

Put the KNB3 that was from the sub into the main
Put the KRX3 in place being careful that both the SubIN and SubOUT 
boards are in place.

Reconnect the cables to the KRX3
Put the top cover on.

Job done.

73,
Don W3FPR


On 5/16/2016 4:14 PM, Mike Smith VE9AA wrote:

Just found it.  Tony, N2TK asked about the 2nd rx.  Good on ya Tony.At
least I am making headway.

  


Can the KNB3's be swapped guys or is there a lot more to it?



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Re: [Elecraft] K3 NB

[N2TK, Tony]

Mike,
They can be swapped. You need to take out the second receiver to get to  the
one on the main rf board. One screw takes each one out. Make sure on the rf
board that there are two lockwashers between the NB standoff and the rf
board.
Take the screw out and the bard pulls out. Swap them and put it back
together. See if you swapped the problem.

73,
N2TK, Tony 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike
Smith VE9AA
Sent: Monday, May 16, 2016 4:15 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 NB

Just found it.  Tony, N2TK asked about the 2nd rx.  Good on ya Tony.At
least I am making headway.

 

Can the KNB3's be swapped guys or is there a lot more to it?

 

Mike VE9AA

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

From: Mike Smith VE9AA [mailto:ve...@nbnet.nb.ca]
Sent: May 16, 2016 5:08 PM
To: 'elecraft@mailman.qth.net'
Subject: K3 NB

 

I wish I could find the email from this weekend from the fellow who asked me
if the NB works on the 2nd receiver.

I hadn't used the 2nd receiver really much at all (only had the rig a few
days) and was hesitant to play with it until I learned a little more about
the rig in general.

 

Anyways - an AHA! -moment.  The IF Noise Blanker actually works pretty well
on the 2nd receiver.  So, that leads me to believe that there's something
about the primary rx that is not quite right.

 

Are there two KNB3 blanker boards in an early K3 with two receivers?

 

Can I revert the firmware back to 4.83 (I saved it to a folder before
upgrading to the latest) and see if somehow the blanker was maybe shut off,
then turn it back on, then re: upgrade the firmware?

 

I just knew there was something up!

 

BTW, it was only the first day I had the radio that I heard relays clickity
clacking when I had the NB engaged.  Now I just transmit once or twice, and
the NB letters flash. (no relay noise)

2nd receiver NB seems fine.

 

Is it easy to find the KNB3 board(s) ?

 

Tnx to whoever it was who asked about that.(kudos and give yourself a pat on
the back) - you were the only one in 25+ ops to suggest that).

  At least now I know the NB does in fact WORK in these Elecraft beasts..but
only in my 2nd RX.

 

Mike VE9AA

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

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Re: [Elecraft] circuit breaker

[Todd Ruby]

Well Ron, I guess there's a first time for everything. Although the radio was 
deaf and dumb, I had display function and it looked as it normally does after 
turning on the power. There was just no receive nor output power. 

I turned it off, pressed the 20 amp circuit breaker on the rear panel and sigs 
were coming through the headphones and I had full power. 

Today it's also operating perfectly. 

73

Todd

> On May 16, 2016, at 3:30 PM, Ron D'Eau Claire  wrote:
> 
> Todd responded to me off the reflector that he lost all power to the K3 so it 
> wasn’t the 20A breaker. That only controls power to the KPA3. The front panel 
> is still powered and the receiver continues to work.
>  
> I suggested it might be the self-resetting breaker inside the K3. That will 
> turn it off completely. Actually power will still be on the KPA3 module and 
> anything plugged into the 12V external power connector on the K3 rear panel, 
> but the K3 itself will look dead with no front panel lights, receive or other 
> functions until it cools and resets itself.
>  
> I’ve never had an issue with either breaker opening unexpectedly.
>  
> 73, Ron AC7AC
>  
> From: a...@sbcglobal.net [mailto:a...@sbcglobal.net] 
> Sent: Monday, May 16, 2016 12:18 PM
> To: Ron D'Eau Claire; 'todd ruby'; 'Elecraft Reflector Reflector'
> Subject: Re: [Elecraft] circuit breaker
>  
> I believe Todd is referring to the breaker on the K3, not his house panel 
> circuit?
> Ron has some good advice, but I wonder how common this circuit breaker 
> operates? 
>  
> I looked thru my manual for more info on it.  The block diagram shows it as a 
> 25A fuse,
> text and device indicate 20A circuit breaker, but NO  info on the type 
> operating curve, or current vs. time for minimum trip?
>  
> I have a 10A circuit breaker on my 40Ahr battery supply and it has never 
> tripped.  It is a thermal time delay like most house breakers.
>  
> Anyone out there have any clue?   Wayne? 
>  
> Mike  AC5P
>  
>  
> 
> On Monday, May 16, 2016 12:28 PM, Ron D'Eau Claire  wrote:
>  
> 
> The normal underlying cause for the breaker to open is over-current. That's
> a 20A breaker that protects only the KPA3 100 watt amplifier module. The
> first thing I'd do is check the current drain from your power supply on the
> band where you experienced the problem. First set the power to 10 watts so
> the KPA3 is bypassed and note the total current drain key down. Now crank up
> the power and see if the part used by the KPA3 is pushing 20A. For example,
> if your total current at 10 W was 3A, does the total at 100 watts approach
> 23A? IF so, the breaker was simply doing its job. Note that circuit breakers
> are not precision devices so it may trip a couple of amperes one way or the
> other from 20A. 
> 
> A primary reason for excessive KPA3 current is a high SWR on your antenna
> system. The higher the SWR, the less efficient the KPA3 becomes and the more
> current it has to draw to produce the power. 
> 
> A defective breaker can also start tripping at lower currents. 
> 
> 73, Ron AC7AC
> 
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of todd
> ruby
> Sent: Monday, May 16, 2016 9:08 AM
> To: Elecraft Reflector Reflector
> Subject: [Elecraft] circuit breaker
> 
> Would anyone venture to guess what would cause the circuit breaker to trip
> on a K3? Mine did all of a sudden yesterday. Fortunately, my friend
> suggested the reset and voila, I am back on the air. But if there is an
> underlying cause, I think it would be wise to be aware of it so as to
> preclude this episode from repeating. Any thoughts are welcome.
> 
> 73
> 
> todd
> 
> WB2ZAB
> 
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Re: [Elecraft] K3 NB

[Dale Boresz]

Mike,

Yes, the KNB3's can be swapped. But if you'll be in there anyway, I'd
strongly suggest that you first remove and then re-insert the KNB3 module
in your main receiver first. Then try it out and see if the blinking "NB"
issue persists. If not, you're done. Otherwise, swapping them and
observing the results would provide some additional useful data points.

73,

Dale - WA8SRA

> Just found it.  Tony, N2TK asked about the 2nd rx.  Good on ya Tony.At
> least I am making headway.
>
>
>
> Can the KNB3's be swapped guys or is there a lot more to it?
>
>
>
> Mike VE9AA
>
>
>
> Mike, Coreen & Corey
>
> Keswick Ridge, NB
>
>
>
> From: Mike Smith VE9AA [mailto:ve...@nbnet.nb.ca]
> Sent: May 16, 2016 5:08 PM
> To: 'elecraft@mailman.qth.net'
> Subject: K3 NB
>
>
>
> I wish I could find the email from this weekend from the fellow who asked
> me
> if the NB works on the 2nd receiver.
>
> I hadn't used the 2nd receiver really much at all (only had the rig a few
> days) and was hesitant to play with it until I learned a little more about
> the rig in general.
>
>
>
> Anyways - an AHA! -moment.  The IF Noise Blanker actually works pretty
> well
> on the 2nd receiver.  So, that leads me to believe that there's something
> about the primary rx that is not quite right.
>
>
>
> Are there two KNB3 blanker boards in an early K3 with two receivers?
>
>
>
> Can I revert the firmware back to 4.83 (I saved it to a folder before
> upgrading to the latest) and see if somehow the blanker was maybe shut
> off,
> then turn it back on, then re: upgrade the firmware?
>
>
>
> I just knew there was something up!
>
>
>
> BTW, it was only the first day I had the radio that I heard relays
> clickity
> clacking when I had the NB engaged.  Now I just transmit once or twice,
> and
> the NB letters flash. (no relay noise)
>
> 2nd receiver NB seems fine.
>
>
>
> Is it easy to find the KNB3 board(s) ?
>
>
>
> Tnx to whoever it was who asked about that.(kudos and give yourself a pat
> on
> the back) - you were the only one in 25+ ops to suggest that).
>
>   At least now I know the NB does in fact WORK in these Elecraft
> beasts..but
> only in my 2nd RX.
>
>
>
> Mike VE9AA
>
>
>
> Mike, Coreen & Corey
>
> Keswick Ridge, NB
>
>
>
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Re: [Elecraft] K3 NB

[Oliver Dröse]

Hi Mike,

yes, there are two KNB3s installed if you have the Sub-RX: one on the 
Main and one on the Sub. And yes, you can swap'em.


73, Olli - DH8BQA

Contest, DX & radio projects: http://www.dh8bqa.de


Am 16.05.2016 um 22:07 schrieb Mike Smith VE9AA:

I wish I could find the email from this weekend from the fellow who asked me
if the NB works on the 2nd receiver.

I hadn't used the 2nd receiver really much at all (only had the rig a few
days) and was hesitant to play with it until I learned a little more about
the rig in general.

  


Anyways - an AHA! -moment.  The IF Noise Blanker actually works pretty well
on the 2nd receiver.  So, that leads me to believe that there's something
about the primary rx that is not quite right.

  


Are there two KNB3 blanker boards in an early K3 with two receivers?

  


Can I revert the firmware back to 4.83 (I saved it to a folder before
upgrading to the latest) and see if somehow the blanker was maybe shut off,
then turn it back on, then re: upgrade the firmware?

  


I just knew there was something up!

  


BTW, it was only the first day I had the radio that I heard relays clickity
clacking when I had the NB engaged.  Now I just transmit once or twice, and
the NB letters flash. (no relay noise)

2nd receiver NB seems fine.

  


Is it easy to find the KNB3 board(s) ?

  


Tnx to whoever it was who asked about that.(kudos and give yourself a pat on
the back) - you were the only one in 25+ ops to suggest that).

   At least now I know the NB does in fact WORK in these Elecraft beasts..but
only in my 2nd RX.

  


Mike VE9AA

  


Mike, Coreen & Corey

Keswick Ridge, NB

  


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Re: [Elecraft] K3 NB

[Mike Smith VE9AA]

Just found it.  Tony, N2TK asked about the 2nd rx.  Good on ya Tony.At
least I am making headway.

 

Can the KNB3's be swapped guys or is there a lot more to it?

 

Mike VE9AA

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

From: Mike Smith VE9AA [mailto:ve...@nbnet.nb.ca] 
Sent: May 16, 2016 5:08 PM
To: 'elecraft@mailman.qth.net'
Subject: K3 NB

 

I wish I could find the email from this weekend from the fellow who asked me
if the NB works on the 2nd receiver.

I hadn't used the 2nd receiver really much at all (only had the rig a few
days) and was hesitant to play with it until I learned a little more about
the rig in general.

 

Anyways - an AHA! -moment.  The IF Noise Blanker actually works pretty well
on the 2nd receiver.  So, that leads me to believe that there's something
about the primary rx that is not quite right.

 

Are there two KNB3 blanker boards in an early K3 with two receivers?

 

Can I revert the firmware back to 4.83 (I saved it to a folder before
upgrading to the latest) and see if somehow the blanker was maybe shut off,
then turn it back on, then re: upgrade the firmware?

 

I just knew there was something up!

 

BTW, it was only the first day I had the radio that I heard relays clickity
clacking when I had the NB engaged.  Now I just transmit once or twice, and
the NB letters flash. (no relay noise)

2nd receiver NB seems fine.

 

Is it easy to find the KNB3 board(s) ?

 

Tnx to whoever it was who asked about that.(kudos and give yourself a pat on
the back) - you were the only one in 25+ ops to suggest that).

  At least now I know the NB does in fact WORK in these Elecraft beasts..but
only in my 2nd RX.

 

Mike VE9AA

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

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[Elecraft] K3 NB

[Mike Smith VE9AA]

I wish I could find the email from this weekend from the fellow who asked me
if the NB works on the 2nd receiver.

I hadn't used the 2nd receiver really much at all (only had the rig a few
days) and was hesitant to play with it until I learned a little more about
the rig in general.

 

Anyways - an AHA! -moment.  The IF Noise Blanker actually works pretty well
on the 2nd receiver.  So, that leads me to believe that there's something
about the primary rx that is not quite right.

 

Are there two KNB3 blanker boards in an early K3 with two receivers?

 

Can I revert the firmware back to 4.83 (I saved it to a folder before
upgrading to the latest) and see if somehow the blanker was maybe shut off,
then turn it back on, then re: upgrade the firmware?

 

I just knew there was something up!

 

BTW, it was only the first day I had the radio that I heard relays clickity
clacking when I had the NB engaged.  Now I just transmit once or twice, and
the NB letters flash. (no relay noise)

2nd receiver NB seems fine.

 

Is it easy to find the KNB3 board(s) ?

 

Tnx to whoever it was who asked about that.(kudos and give yourself a pat on
the back) - you were the only one in 25+ ops to suggest that).

  At least now I know the NB does in fact WORK in these Elecraft beasts..but
only in my 2nd RX.

 

Mike VE9AA

 

Mike, Coreen & Corey

Keswick Ridge, NB

 

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Re: [Elecraft] K3 NB

[Fred Jensen]

Noise blankers have never worked well, or at all, on most power line 
noise which is usually caused by very small arcing in the distribution 
line [usually around 12 KV in the US] hardware on the poles.  It's 
multiple arcs, and the noise pulses from each one overlap each other 
producing the rough buzz.


The K3 IF NB worked far better than great for me when I was surrounded 
by electric fences and it's puzzling that anyone is having problems 
getting it to work.  Ignition noise tends to be a thing of the past, but 
in the few times I've encountered it. the NB was extremely effective as 
well, and easy to adjust.


I don't remember who first came up with it ... I thin Art Collins had 
some role ... but it was light years ahead of the old Lamb Noise 
Limiters such as in the SX-28.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

On 5/16/2016 8:57 AM, riese-k3...@juno.com wrote:


lots of opinions,,, what I take away is regardless of the update ( I am
woefully behind )
the NB on the K3 doesnt work well on power line noise,,, this is my
experience as well
but I am behind on the software upgrades

Bob K3DJC


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Re: [Elecraft] circuit breaker

[Ron D'Eau Claire]

Todd responded to me off the reflector that he lost all power to the K3 so it 
wasn’t the 20A breaker. That only controls power to the KPA3. The front panel 
is still powered and the receiver continues to work. 

 

I suggested it might be the self-resetting breaker inside the K3. That will 
turn it off completely. Actually power will still be on the KPA3 module and 
anything plugged into the 12V external power connector on the K3 rear panel, 
but the K3 itself will look dead with no front panel lights, receive or other 
functions until it cools and resets itself. 

 

I’ve never had an issue with either breaker opening unexpectedly.

 

73, Ron AC7AC

 

From: a...@sbcglobal.net [mailto:a...@sbcglobal.net] 
Sent: Monday, May 16, 2016 12:18 PM
To: Ron D'Eau Claire; 'todd ruby'; 'Elecraft Reflector Reflector'
Subject: Re: [Elecraft] circuit breaker

 

I believe Todd is referring to the breaker on the K3, not his house panel 
circuit?

Ron has some good advice, but I wonder how common this circuit breaker 
operates?  

 

I looked thru my manual for more info on it.  The block diagram shows it as a 
25A fuse,

text and device indicate 20A circuit breaker, but NO  info on the type 
operating curve, or current vs. time for minimum trip?

 

I have a 10A circuit breaker on my 40Ahr battery supply and it has never 
tripped.  It is a thermal time delay like most house breakers.

 

Anyone out there have any clue?   Wayne?  

 

Mike  AC5P

 

 

On Monday, May 16, 2016 12:28 PM, Ron D'Eau Claire  wrote:

 

The normal underlying cause for the breaker to open is over-current. That's
a 20A breaker that protects only the KPA3 100 watt amplifier module. The
first thing I'd do is check the current drain from your power supply on the
band where you experienced the problem. First set the power to 10 watts so
the KPA3 is bypassed and note the total current drain key down. Now crank up
the power and see if the part used by the KPA3 is pushing 20A. For example,
if your total current at 10 W was 3A, does the total at 100 watts approach
23A? IF so, the breaker was simply doing its job. Note that circuit breakers
are not precision devices so it may trip a couple of amperes one way or the
other from 20A. 

A primary reason for excessive KPA3 current is a high SWR on your antenna
system. The higher the SWR, the less efficient the KPA3 becomes and the more
current it has to draw to produce the power. 

A defective breaker can also start tripping at lower currents. 

73, Ron AC7AC


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of todd
ruby
Sent: Monday, May 16, 2016 9:08 AM
To: Elecraft Reflector Reflector
Subject: [Elecraft] circuit breaker

Would anyone venture to guess what would cause the circuit breaker to trip
on a K3? Mine did all of a sudden yesterday. Fortunately, my friend
suggested the reset and voila, I am back on the air. But if there is an
underlying cause, I think it would be wise to be aware of it so as to
preclude this episode from repeating. Any thoughts are welcome.

73

todd

WB2ZAB

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Re: [Elecraft] circuit breaker

[ac5p]

I believe Todd is referring to the breaker on the K3, not his house panel 
circuit?Ron has some good advice, but I wonder how common this circuit breaker 
operates?  
I looked thru my manual for more info on it.  The block diagram shows it as a 
25A fuse,text and device indicate 20A circuit breaker, but NO  info on the type 
operating curve, or current vs. time for minimum trip?
I have a 10A circuit breaker on my 40Ahr battery supply and it has never 
tripped.  It is a thermal time delay like most house breakers.
Anyone out there have any clue?   Wayne?      
Mike  AC5P
 

On Monday, May 16, 2016 12:28 PM, Ron D'Eau Claire  wrote:
 

 The normal underlying cause for the breaker to open is over-current. That's
a 20A breaker that protects only the KPA3 100 watt amplifier module. The
first thing I'd do is check the current drain from your power supply on the
band where you experienced the problem. First set the power to 10 watts so
the KPA3 is bypassed and note the total current drain key down. Now crank up
the power and see if the part used by the KPA3 is pushing 20A. For example,
if your total current at 10 W was 3A, does the total at 100 watts approach
23A? IF so, the breaker was simply doing its job. Note that circuit breakers
are not precision devices so it may trip a couple of amperes one way or the
other from 20A. 

A primary reason for excessive KPA3 current is a high SWR on your antenna
system. The higher the SWR, the less efficient the KPA3 becomes and the more
current it has to draw to produce the power. 

A defective breaker can also start tripping at lower currents. 

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of todd
ruby
Sent: Monday, May 16, 2016 9:08 AM
To: Elecraft Reflector Reflector
Subject: [Elecraft] circuit breaker

Would anyone venture to guess what would cause the circuit breaker to trip
on a K3? Mine did all of a sudden yesterday. Fortunately, my friend
suggested the reset and voila, I am back on the air. But if there is an
underlying cause, I think it would be wise to be aware of it so as to
preclude this episode from repeating. Any thoughts are welcome.

73

todd

WB2ZAB

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Re: [Elecraft] circuit breaker

[Ron D'Eau Claire]

The normal underlying cause for the breaker to open is over-current. That's
a 20A breaker that protects only the KPA3 100 watt amplifier module. The
first thing I'd do is check the current drain from your power supply on the
band where you experienced the problem. First set the power to 10 watts so
the KPA3 is bypassed and note the total current drain key down. Now crank up
the power and see if the part used by the KPA3 is pushing 20A. For example,
if your total current at 10 W was 3A, does the total at 100 watts approach
23A? IF so, the breaker was simply doing its job. Note that circuit breakers
are not precision devices so it may trip a couple of amperes one way or the
other from 20A. 

A primary reason for excessive KPA3 current is a high SWR on your antenna
system. The higher the SWR, the less efficient the KPA3 becomes and the more
current it has to draw to produce the power. 

A defective breaker can also start tripping at lower currents. 

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of todd
ruby
Sent: Monday, May 16, 2016 9:08 AM
To: Elecraft Reflector Reflector
Subject: [Elecraft] circuit breaker

Would anyone venture to guess what would cause the circuit breaker to trip
on a K3? Mine did all of a sudden yesterday. Fortunately, my friend
suggested the reset and voila, I am back on the air. But if there is an
underlying cause, I think it would be wise to be aware of it so as to
preclude this episode from repeating. Any thoughts are welcome.

73

todd

WB2ZAB

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Re: [Elecraft] circuit breaker

[Charlie T, K3ICH]

I'm fairly sure he's talking about the circuit breaker IN the radio, rather
than an AC mains breaker

Charlie k3ICH



-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David
Davis
Sent: Monday, May 16, 2016 12:55 PM
To: todd ruby 
Cc: Elecraft Reflector Reflector 
Subject: Re: [Elecraft] circuit breaker

Check if the breaker is an AFCI type breaker. If it is there is an article
on the ARRL site with details on how you might get them replaced for free. 

I just went through this with mine. Homes built after 2011 have arc fault
tolerant (AFCI) breakers. The RF can cause them to open. I contacted the
Eaton using the information from ARRL and Eaton sent me all new breakers for
free. It ended up being about $300 in breakers. 

Here is a link to the ARRL article. 
http://www.arrl.org/news/arrl-helps-manufacturer-to-resolve-arc-fault-circui
t-interrupter-rfi-problems

Hope this helps 

David
KG6MTI

Sent from my iPhone

> On May 16, 2016, at 10:07, todd ruby  wrote:
> 
> Would anyone venture to guess what would cause the circuit breaker to trip
on a K3? Mine did all of a sudden yesterday. Fortunately, my friend
suggested the reset and voila, I am back on the air. But if there is an
underlying cause, I think it would be wise to be aware of it so as to
preclude this episode from repeating. Any thoughts are welcome.
> 
> 73
> 
> todd
> 
> WB2ZAB
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> This list hosted by: http://www.qsl.net Please help support this email 
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Re: [Elecraft] circuit breaker

[David Davis]

Check if the breaker is an AFCI type breaker. If it is there is an article on 
the ARRL site with details on how you might get them replaced for free. 

I just went through this with mine. Homes built after 2011 have arc fault 
tolerant (AFCI) breakers. The RF can cause them to open. I contacted the Eaton 
using the information from ARRL and Eaton sent me all new breakers for free. It 
ended up being about $300 in breakers. 

Here is a link to the ARRL article. 
http://www.arrl.org/news/arrl-helps-manufacturer-to-resolve-arc-fault-circuit-interrupter-rfi-problems

Hope this helps 

David
KG6MTI

Sent from my iPhone

> On May 16, 2016, at 10:07, todd ruby  wrote:
> 
> Would anyone venture to guess what would cause the circuit breaker to trip on 
> a K3? Mine did all of a sudden yesterday. Fortunately, my friend suggested 
> the reset and voila, I am back on the air. But if there is an underlying 
> cause, I think it would be wise to be aware of it so as to preclude this 
> episode from repeating. Any thoughts are welcome.
> 
> 73
> 
> todd
> 
> WB2ZAB
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Re: [Elecraft] [K2] External amplifier keying circuit question

[Don Wilhelm]

Steve,

It is not a good idea to leave the gate of a MOSFET with no static drain 
on it.
When the board is removed from the K2 the gate at the input is exposed - 
thus the 100k


The 100k between the 2 devices might be omitted if you wish.

The first link you mentioned is Eric Swartz work - the second is from 
Tom Hammond (SK).
I would recommend Tom's version.  The 2nd FET could be a 2N7000 if it 
will handle the current and voltage that you have to deal with.


73,
Don W3FPR

On 5/16/2016 10:01 AM, Steve Kavanagh via Elecraft wrote:

  I'm planning to add an external amplifier/transverter keying circuit to one 
of my K2s.  I found two versions on the web, both apparently designed by N0SS 
(SK).  The one on the Elecraft site 
(http://www.elecraft.com/Apps/Amp_keying_ckt.htm ) appears to be his original 
circuit, using a 2N7000 driving a 2N.  The archive of Tom's later kit 
offering (http://www.mmccs.com/mmarc/n0ss/k2_t-r_rly_drvr.pdf ) uses two 
MOSFETs and is capable of keying somewhat higher voltage and current.  But also 
he added a 100k resistor from the input gate (8R) to ground and another from 
the gate of the second MOSFET to ground.
I am trying to figure out if these two 100 k resistors serve any useful purpose 
or if I can happily leave them both out of the 2-MOSFET circuit.  There doesn't 
immediately appear to be any need to pull these gates down as there are several 
loads on the input 8R voltage (on the K2 RF board) which will do that for the 
1st MOSFET, and the 1st MOSFET will pull down the gate of the 2nd one when 
needed.  Maybe something odd will happen on power-up or power-down?
Any thoughts?



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[Elecraft] circuit breaker

[todd ruby]

Would anyone venture to guess what would cause the circuit breaker to trip on a 
K3? Mine did all of a sudden yesterday. Fortunately, my friend suggested the 
reset and voila, I am back on the air. But if there is an underlying cause, I 
think it would be wise to be aware of it so as to preclude this episode from 
repeating. Any thoughts are welcome.

73

todd

WB2ZAB
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Re: [Elecraft] K3 NB

[riese-k3djc]

lots of opinions,,, what I take away is regardless of the update ( I am
woefully behind )
the NB on the K3 doesnt work well on power line noise,,, this is my
experience as well
but I am behind on the software upgrades

Bob K3DJC 

> One of the (few) disappointments of my K3 is the NB.  I've never 
> found 
> any settings which are effective against power line noise under any 
> 
> conditions, 

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[Elecraft] K3 NB

[Scott Ellington]

On 5/16/2016 04:40, Oliver Dröse wrote:
I have both and the KX3's NB is definitely much better than the K3's 
(although still worse than the Icom NBs). Probably a question of the 
newer DSP chip in the KX3 and maybe updated DSP code, too (on which 
Lyle, KK7P, could chime in). 


One of the (few) disappointments of my K3 is the NB.  I've never found 
any settings which are effective against power line noise under any 
conditions, even on a quiet band.  My old FT-1000D NB, on the other 
hand, can be very effective against that same noise, provided the band 
isn't full of strong signals.  Neither is useful in contests, of 
course.  Given the way the NB's in both transceivers work (wide filter 
ahead of NB), neither can be effective with strong signals nearby.  My 
dream is that Elecraft could provide a way to use the subreceiver to 
detect noise outside the band, and control the NB in the main receiver.  
Or perhaps some day I'll figure out how to do that myself.  However, 
first the K3 NB has to work in the absence of strong signals, which it 
does not.


--
Scott Ellington  K9MA
Madison, Wisconsin, USA

k...@sdellington.us

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[Elecraft] [K2] External amplifier keying circuit question

[Steve Kavanagh via Elecraft]

 I'm planning to add an external amplifier/transverter keying circuit to one of 
my K2s.  I found two versions on the web, both apparently designed by N0SS 
(SK).  The one on the Elecraft site 
(http://www.elecraft.com/Apps/Amp_keying_ckt.htm ) appears to be his original 
circuit, using a 2N7000 driving a 2N.  The archive of Tom's later kit 
offering (http://www.mmccs.com/mmarc/n0ss/k2_t-r_rly_drvr.pdf ) uses two 
MOSFETs and is capable of keying somewhat higher voltage and current.  But also 
he added a 100k resistor from the input gate (8R) to ground and another from 
the gate of the second MOSFET to ground.
I am trying to figure out if these two 100 k resistors serve any useful purpose 
or if I can happily leave them both out of the 2-MOSFET circuit.  There doesn't 
immediately appear to be any need to pull these gates down as there are several 
loads on the input 8R voltage (on the K2 RF board) which will do that for the 
1st MOSFET, and the 1st MOSFET will pull down the gate of the 2nd one when 
needed.  Maybe something odd will happen on power-up or power-down?
Any thoughts?
73,Steve VE3SMA
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Re: [Elecraft] Travel Case for K3

[David Christ]

What issues with TSA caused you to start shipping via FedEx?  I experienced no 
problems the last time I came and was planning to bring something again when we 
come up to take care of our grandson.

Isn’t FedEx rather pricy to and from Alaska?

David K0LUM


> On May 16, 2016, at 4:34 AM, Edward R Cole  wrote:
> 
>  I used to be able to carry-on airlines but stopped due to TSA screening.  
> Now I pre-ship with FedEx to my destination hotel.



David K0LUM

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Re: [Elecraft] Elecraft Digest, Vol 145, Issue 16

[Scott Townley]

The easiest way I've found to reroute signal lines in these sorts of cables is 
to build a little "adapter" of back-to-back DB shells (9, 15, 25), one male and 
one female, separated by a  pair of 1" 4-40 hex standoffs.  You then wire 
between the shells whatever pinout changes you need.  Relatively 
straightforward and doesn't wreck the original cable.  That's how I did it on 
my setup (identical to yours).
> 
> 
> Message: 21
> Date: Sun, 15 May 2016 11:43:05 -0400
> From: Art 
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] KPA500 with K3/0 and remote rig
> Message-ID: <154b515cd69-3fd8-1c...@webprd-a54.mail.aol.com>
> Content-Type: text/plain; charset=utf-8
> 
> Hi all,
> 
> 
> Interested in using the KPA500 via remote. K3/0 manual states that a simple 
> mod to the KPAK3AUX cable is needed. 
> 
> 
> However, this cable from factory has a molded shell on both ends. Anyone 
> figured out how to access it to make the wiring connection needed?
> 
> 
> Thanks.
> 
> 
> Art KZ5D
> 
> 
> --
> 
> 

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Re: [Elecraft] NB issue

[Oliver Dröse]

Hi David,


I don't own a K3, hence me not knowing about the significance of the flashing 
NB, I use the KX3 and find the noise blanker works very well on powerline 
noise, narrow pulses, ignition spark type noise. I would find it strange and 
disappointing if the K3's blanker was poorer than the KX3's.


I have both and the KX3's NB is definitely much better than the K3's 
(although still worse than the Icom NBs). Probably a question of the 
newer DSP chip in the KX3 and maybe updated DSP code, too (on which 
Lyle, KK7P, could chime in).


73, Olli - DH8BQA


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Re: [Elecraft] Travel Case for K3

[Edward R Cole]

I like the Pelican cases.  We used them extensively for portable HT 
Field kits at my former work (we had about 14 of them).  They are 
rated waterproof to extreme depth (Navy Seals use them for 
equipment).  The new cases come with perforated foam inserts which 
you can remove to make a custom fit space for equipment.  Extremely 
durable from dropping or being run over.  But they are expensive so 
shop around on line as often one can get up to 50% off MFRP.


I have two.  One encloses my 10-GHz portable station which includes 
my KX3-2M.  I used to be able to carry-on airlines but stopped due to 
TSA screening.  Now I pre-ship with FedEx to my destination hotel.


The other one fit a FT-726 VHF satellite radio and could easily 
accommodate a K3.  I do not travel with my K3 so it does not see much use.


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

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Re: [Elecraft] NB issue

[David Anderson via Elecraft]

Mike,

I think Bill was alluding to my answer which on the face of it didn't make any 
sense, but what I was trying to determine was whether stray RF may have been 
doing something to the K3 NB circuitry during transmit as you suggested you 
thought the NB started to flash after transmitting, hence my suggestion to 
eliminate any possibility by using a dummy load, that's all. 

Now thanks to the group we have the correct answer, the NB annunciation legend 
can flash when the I.F. blanker setting is too high for the signals. It will 
stop flashing when transmitting and start again back on receive. 

I should have searched the electronic manual, that is what I generally do in 
iBooks on the iPad where I keep all my radio manuals. It is generally easier 
than manually searching the paper copy which is safely stored away in a file.

I don't own a K3, hence me not knowing about the significance of the flashing 
NB, I use the KX3 and find the noise blanker works very well on powerline 
noise, narrow pulses, ignition spark type noise. I would find it strange and 
disappointing if the K3's blanker was poorer than the KX3's. 

What is puzzling is that you say it electric fence pulses that the NB is 
struggling with, I would have thought that is one of the easiest things to 
blank out, a simple I.F. Blanker shouldn't have a problem with that. 

Like so many controls that give you a lot of user settings there are benefits 
and also problems, mostly the defaults are a good starting point, but changing 
too many settings at once will not help. You have to be methodical and change 
one thing at a time and see what the effect if any is.

I have used the KX3 as my main rig for more than a year and am still finding 
things about it that I didn't know. It's part of the joy.


73 from David GM4JJJ

> On 16 May 2016, at 00:06, Mike Smith VE9AA  wrote:
> 
> I am not sure what you are eluding to Bill, but suffice to say I don;'t
> think you understand the issue.
> Once I have transmitted, the NB flashes and will stay flashing forever.
> (while I am sitting there receiving)
> Also, the NB seems to do little to nothing.
> 
> I am not a K3 engineer, but I am now SURE this is not how it's supposed to
> work.
> 
> I am going to crack the radio open tomorrow and see if the board has come
> loose during shipping.
> 
> Please don't anyone email me again asking me to look at the page in the
> manual concerning the NB. (I have had a number of you do that and
> even send me a copy of the page. )
> 
> I give you my word I have read it and have read it again!.  Regardless of
> settings the NB letters flash. (when invoking IF NB_)
> 
> Something is not correct :-)
> 
> Mike VE9AA
> 
> Mike, Coreen & Corey
> Keswick Ridge, NB
> 
> 
> -Original Message-
> From: Nr4c [mailto:n...@widomaker.com] 
> Sent: May 15, 2016 8:00 PM
> To: David Anderson
> Cc: Mike Smith VE9AA; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] NB issue
> 
> What effect do you expect when transmitting?  I would think "nothing" since
> NB is a Receive function. 
> 
> Sent from my iPhone
> ...nr4c. bill
> 

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Re: [Elecraft] NB issue

[Oliver Dröse]

Hey Mike,

good to see you here, too. ;-)

> A rig sitting right next to it from an Asian country eliminates the 
pulses

> easily and I have been told the K3 is way better. I have to believe that.

Forget it! As much as I like my K3 (and I really do!) the NB + NR are 
the worst I ever experienced. The Icom NB is running circles around it 
... just to put your expectations where they belong. ;-)


Besides this you'll probably love the radio ... as do I. ;-)

73, Olli - DH8BQA



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Re: [Elecraft] K3 cracked control knob

[David Anderson via Elecraft]

Have a great time in Dayton Sam. Wish I could be with you!

73 from David GM4JJJ

> On 16 May 2016, at 08:24, Sam Jewell  wrote:
> 
> Apologies to all that my request went to the wrong group. I had that one down 
> as Elecraft support.
> I will probably lodge my request directly with Elecraft on Friday at Dayton. 
> No getting the wrong group then!
> 73 de Sam
> 
> 

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Re: [Elecraft] K3 cracked control knob

[Sam Jewell]

Apologies to all that my request went to the wrong group. I had that one down 
as Elecraft support.
I will probably lodge my request directly with Elecraft on Friday at Dayton. No 
getting the wrong group then!
73 de Sam



Sent from my DDKpad

g4ddk.com
g4ddk.blogspot.com


> On 16 May 2016, at 02:35, Brendon Whateley  wrote:
> 
> That may be a better request to send/call directly to Elecraft Support rather 
> than the public email group which is not guaranteed to be seen by the folks 
> at E.
> 
> - Brendon
> 
>> On Sun, May 15, 2016 at 12:43 PM,  wrote:
>> Would it be possible to bring a replacement knob to Dayton later this week, 
>> for me to pick up, please?It is the smaller, RF/SQL knob that has ( badly) 
>> cracked. The larger outer one cracked a few years ago and you have already 
>> replaced this one for me.Many thanks
>> Sam Jewell, G4DDK/W5DDK
>> K3 Nr 5879
>> 
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Re: [Elecraft] OT thread non-Elecraft Looking for 5 Pense piece

[David Anderson via Elecraft]

Gerald,

Why? Just curious? Does it have to be in mint condition?

I can pop one in an envelope with a QSL card if you like. According to the 
Royal Mail it isn't legal to send coins through the mail in the USA. I don't 
suppose a single 5p (pence) would matter though.


73 from David GM4JJJ

> On 16 May 2016, at 05:09, KC6CNN  wrote:
> 
> I am looking for a UK 5 Pense Piece. Does anyone know where I can purchase
> one?
> Thank you
> Gerald - KC6CNN
> 
> 
> 
> 
> 
> -
> KC6CNN - Gerald
> K1 # 0014
> K2 # 5486
> K3 # 6294
> KX3 # 757
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/OT-thread-non-Elecraft-Looking-for-5-Pense-piece-tp7617475.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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