[Elecraft] Modules wanted

[Len Chesler]

If anyone has the following modules, I would be interested in purchasing:
4-band module for K1 
KBPF3 Genral coverage RX band module for K3
Please let me know what you have.
Tnx and best 73
Len, K6LEN,  310-261-6696


 

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Re: [Elecraft] Confusion on Roofing Filters

[Wayne Burdick]

Hi Mike,

The KX3 converts RF directly to baseband, so the roofing filters are  
made using high-performance op-amps and very tight-tolerance discrete  
parts, not crystals.

73,
Wayne
N6KR


On Sep 6, 2011, at 2:06 PM, w0ih wrote:

> Wayne,
>
> Thanks for the very prompt reply last week to my query.
>
> So now I have another question concerning roofing filters.  Will the  
> KX3 use
> the same roofing filter series as the K3?
>
> I added a 2.1 kHz filter in my K3 and found it very effective (after  
> a bit
> of learning!).  Since then, I've wanted to upgrade the 5 pole filter  
> that I
> have in my K3 to an 8 pole.   Can I put the 5 pole that I pull from  
> the K3
> into the KX3?
>
> Mike
>
>
>
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/Confusion-on-Roofing-Filters-tp6708928p6765692.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] W2 and use with computer

[D Joyce]

Hi Jack:  It looks like the features of the Operate Tab in the KPA Utility 
will provide what I need.  Now to get it working thru the RRC-1258 units.

Can I suggest that the KPA500 Owner's Manual be updated to point to the 
Remote Control capability using the KPA Utility.  I completely missed it 
until you gave me the pointer.  Thanks.

73,  Doug  VE3MV

- Original Message - 
From: "Jack Brindle" 
To: "D Joyce" 
Cc: "Elecraft List" 
Sent: Tuesday, September 06, 2011 6:28 PM
Subject: Re: [Elecraft] W2 and use with computer


> Doug;
>
> Why not just connect the serial port directly to the KPA500's PC port  so 
> you can directly control and monitor the KPA500? You can control  power of 
> the KPA500 through the serial port as well as command and  monitor it.
>
> The KPA500 serial control spec is on the Elecraft web page in the  manuals 
> section.
>
> Jack Brindle, W6FB
>
>
>>
>> 73
>>
>> Doug  VE3MV

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Re: [Elecraft] W2 and use with computer

[Brian & Cyndi]

Hi, Doug!

The W2 acts exactly as described in the manual.  Send it a "F" and it 
responds with Forward Power.  Our belief that the wattmeter should not 
speak unless spoken to goes back to the W1 and Wayne Burdick's 
philosophy of how electronic equipment should behave.

73,
Brian, W6FVI


On 9/6/2011 3:21 PM, D Joyce wrote:
> GA:  Perhaps someone here can clarify something regarding the serial computer 
> interface with the W2.
>
> I want to use the W2 in a remote station installation to sense output power 
> and tell me whether or not the KPA500 has been turned On.  To do this I plan 
> to run the serial line from the W2 thru the Com1 transparent serial channel 
> in a pair of RemoteRig RRC-1258MkIIs units.  The computer at the control site 
> will be running the W2 Ver 1.1.9.6 software.  (There is no computer at the 
> remote site where the K3&  KPA500 are located.)  Momentary switch closures to 
> turn the K3 and KPA-500 ON will be provided by the remote switch capability 
> of the MicroBit 1216H Web switch units.  Confirmation of the K3 being ON is 
> provided by receive audio, but I need a power sensor to confirm that the 
> KPA-500 has been turned ON and is actually transmitting.
>
> Could someone provide confirmation that the power output level is 
> automatically displayed by the W2 software anytime power output is displayed 
> on the LEDs of the W2 unit itself.  What got me concerned is the explanation 
> in the top paragraph of the Elecraft W2 Serial Interface Commands document 
> Rev D.  It says in part "The W2 responds to commands for data supplied by the 
> external system.  Nothing is sent until a command is received by the W2."
>
> I've had a LP-100A for a couple of years and tried to use it but it requires 
> a serial line bit rate of 115,200 baud whereas the RRC unit can only go up to 
> 57,600.  It looks like the W2 will be the answer since its bit rate is only 
> 9600 baud.
>
> Please excuse the bandwidth.
>
> 73
>
> Doug  VE3MV
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Re: [Elecraft] K3 - Macbook Pro

[Rick Prather]

Agreed!  If you are running RTTY or PSK I also like cocoaModem, a native Mac 
app.

Among other things, I like it's it's ability to display both receivers in 
Wideband RTTY mode on two separate waterfalls.   Great for pile ups.

Rick
K6LE


On 9/6/2011, at 5:16 , Bob Nielsen wrote:

> You can't go wrong with a Griffin iMic and it is powered by the USB port.  
> 
> Instead of running Parallels, you might take a look at fldigi 
> .  There are versions for OS X, Linux, Windows, etc.
> 
> 73, Bob N7XY
> 
> _
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Re: [Elecraft] K3 - Macbook Pro

[Bob Nielsen]

You can't go wrong with a Griffin iMic and it is powered by the USB port.  

Instead of running Parallels, you might take a look at fldigi 
.  There are versions for OS X, Linux, Windows, etc.

73, Bob N7XY

_
N7XY DX Cluster Node - telnet to n7xy.net, port 7300





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[Elecraft] ARRL SW HAMCON Torrance CA

[Lisa Jones - Elecraft Sales]

This coming weekend, Sept. 9, 10 and 11th is the ARRL SW HAMCON 
Convention in Torrance CA.

Eric will be working the booth and could really use some help in the 
booth any or all days.

If you have some time to spare and can help out for a few hours, you can 
email me directly, l...@elecraft.com and let me know.

As always, we greatly appreciate your help and support!

YES- there will be a KX3 Demo in the booth along with K-Lines, XG3s and 
all the usual suspects!

Thank you for your consideration.

Lisa

-- 
Lisa Jones
Elecraft, Inc.
(831) 763-4211

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Re: [Elecraft] KPA500 [END of Thread]

[Eric Swartz - WA6HHQ, Elecraft]

Folks - Let's end this mutated to OT thread. It should have ended on its 
opwn many posts ago.

Please self moderate and resist posting on high volume OT threads like 
this one.

73, Eric
Elecraft List Modulator

---
www.elecraft.com


On 9/6/2011 4:08 PM, Fred Jensen wrote:
> On 9/6/2011 3:00 PM, Ron D'Eau Claire wrote:
>
> Free 1625's in the 1950's?? Sheesh, I had to pay 10 cents each for them!
> I've probably got a half-dozen or more in the "tube box" in the basement
> if you really want any.  They were "sort of free," they came in the
> ARC-5's I bought for 3 bucks each.  I still have one of those too ...
> 40m I think.  The good news is I don't have a power supply for it
> anymore, I doubt any of my friends want to hear the key clicks it will
> generate.  Cathode keyed ... don't touch the metal parts of the key.
> Nowadays, I suppose OSHA would have a cow.
>
> 73,
>
> Fred K6DGW
>
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Re: [Elecraft] K3 stopped communicating

[Guy Olinger K2AV]

Assume that you are working with winders, make sure that the com port has
not been reassigned because you added or removed some usb device from the
system.  Go into device manager, look under com ports and see if your usb
adapter is on the com port you expect it on.

73, Guy.

On Tue, Sep 6, 2011 at 5:57 PM, stan levandowski wrote:

> My K3 (#5244) mysteriously stopped working with HRD.  It had been
> working FB for months.  HRD claimed it could not connect with the K3.
> I then tried it with the K3 Utility and I got the following:
>
> Xe211 Bootstrap loader did not echo a D
> MCU Firmware load failed
>
> It's a K3/10 which I built and it works just fine except for this.  The
> USB cable is the Elecraft product.
>
> So far I've downloaded a 'fresh' copy of the utility, cold-started the
> system, and reviewed the process.
>
> I'm not particularly computer-literate when it comes to this new-fangled
> stuff and I'm becoming less enthusiastic every day ;-)
> (Gimme a System 360/Mod 67, a bank of 2400 bpi tapes, and assembler
> language any day!)
>
> Any suggestions would be appreciated.  My gut feel is that it's in the
> K3.  The sudden cessation of communication with HRD for no apparent
> reason makes me think this way.
>
> 73, Stan WB2LQF
>
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Re: [Elecraft] KPA500

[Fred Jensen]

On 9/6/2011 3:00 PM, Ron D'Eau Claire wrote:
>
> Free 1625's in the 1950's?? Sheesh, I had to pay 10 cents each for them!

I've probably got a half-dozen or more in the "tube box" in the basement 
if you really want any.  They were "sort of free," they came in the 
ARC-5's I bought for 3 bucks each.  I still have one of those too ... 
40m I think.  The good news is I don't have a power supply for it 
anymore, I doubt any of my friends want to hear the key clicks it will 
generate.  Cathode keyed ... don't touch the metal parts of the key. 
Nowadays, I suppose OSHA would have a cow.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2011 Cal QSO Party 1-2 Oct 2011
- www.cqp.org
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Re: [Elecraft] K3 - Macbook Pro

[Mike]

Thanks, Alan.

Good info. I'm curious about the splitter cable. Can you describe it in more 
detail? 
The solo jack was able to pass audio in both directions? I read somewhere that 
it had 
to be manually switched in the Sys Prefs|Sound gizwadget. (These new Mac terms 
. . . 
. :-D )

I ordered an iMic.

73, Mike

On 9/6/2011 5:45 PM, Alan D. Wilcox wrote:
> Mike,
> The iMic works great with the MB Pro. See 
> http://wilcoxengineering.com/projects/amateur-projects/44-psk31-k2 for my 
> setup 
> with using Parallels as well.
> Cheers,
> Alan
>
> Alan D. Wilcox, W3DVX (K2-5373, K3-40)
> 570-321-1516
> http://WilcoxEngineering.com
> http://eBookEditor.net
> https://www.smashwords.com/books/view/28062?ref=awilcox
> Williamsport, PA 17701
>
>
> On 9/6/11 4:17 PM, Mike wrote:
>> I've been using AFSK A for RTTY and PSK. I got a MacBook Pro yesterday, and 
>> it has
>> only 1 audio jack, which may be either input or output. I'll be running Win7 
>> in
>> Parallels for my ham stuff.
>>
>> Is there an external sound card that will work? I found one, but it requires 
>> external
>> power.
>>
>> How about serial ports? Will USB/serial converters work?
>>
>> What's your solution?
>>
>> I'd love to talk to any Mac programmers out there, off list.
>>
>> 73, Mike NF4L
>


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Re: [Elecraft] W2 and use with computer

[Jack Brindle]

Doug;

Why not just connect the serial port directly to the KPA500's PC port  
so you can directly control and monitor the KPA500? You can control  
power of the KPA500 through the serial port as well as command and  
monitor it.

The KPA500 serial control spec is on the Elecraft web page in the  
manuals section.

Jack Brindle, W6FB


On Sep 6, 2011, at 3:21 PM, D Joyce wrote:

> GA:  Perhaps someone here can clarify something regarding the serial  
> computer interface with the W2.
>
> I want to use the W2 in a remote station installation to sense  
> output power and tell me whether or not the KPA500 has been turned  
> On.  To do this I plan to run the serial line from the W2 thru the  
> Com1 transparent serial channel in a pair of RemoteRig RRC-1258MkIIs  
> units.  The computer at the control site will be running the W2 Ver  
> 1.1.9.6 software.  (There is no computer at the remote site where  
> the K3 & KPA500 are located.)  Momentary switch closures to turn the  
> K3 and KPA-500 ON will be provided by the remote switch capability  
> of the MicroBit 1216H Web switch units.  Confirmation of the K3  
> being ON is provided by receive audio, but I need a power sensor to  
> confirm that the KPA-500 has been turned ON and is actually  
> transmitting.
>
> Could someone provide confirmation that the power output level is  
> automatically displayed by the W2 software anytime power output is  
> displayed on the LEDs of the W2 unit itself.  What got me concerned  
> is the explanation in the top paragraph of the Elecraft W2 Serial  
> Interface Commands document Rev D.  It says in part "The W2 responds  
> to commands for data supplied by the external system.  Nothing is  
> sent until a command is received by the W2."
>
> I've had a LP-100A for a couple of years and tried to use it but it  
> requires a serial line bit rate of 115,200 baud whereas the RRC unit  
> can only go up to 57,600.  It looks like the W2 will be the answer  
> since its bit rate is only 9600 baud.
>
> Please excuse the bandwidth.
>
> 73
>
> Doug  VE3MV
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[Elecraft] K6JSS/7 - tomorrow's tentative schedule

[Kevin Rock]

Starting at 1500z.
I will try these bands in this order: 40, 30, and then 20 meters.
So, 7060, 10116, and 14060 kHz.
That way I can cover more ground in my one hour of operation.
Kevin.
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[Elecraft] W2 and use with computer

[D Joyce]

GA:  Perhaps someone here can clarify something regarding the serial computer 
interface with the W2.

I want to use the W2 in a remote station installation to sense output power and 
tell me whether or not the KPA500 has been turned On.  To do this I plan to run 
the serial line from the W2 thru the Com1 transparent serial channel in a pair 
of RemoteRig RRC-1258MkIIs units.  The computer at the control site will be 
running the W2 Ver 1.1.9.6 software.  (There is no computer at the remote site 
where the K3 & KPA500 are located.)  Momentary switch closures to turn the K3 
and KPA-500 ON will be provided by the remote switch capability of the MicroBit 
1216H Web switch units.  Confirmation of the K3 being ON is provided by receive 
audio, but I need a power sensor to confirm that the KPA-500 has been turned ON 
and is actually transmitting.

Could someone provide confirmation that the power output level is automatically 
displayed by the W2 software anytime power output is displayed on the LEDs of 
the W2 unit itself.  What got me concerned is the explanation in the top 
paragraph of the Elecraft W2 Serial Interface Commands document Rev D.  It says 
in part "The W2 responds to commands for data supplied by the external system.  
Nothing is sent until a command is received by the W2." 

I've had a LP-100A for a couple of years and tried to use it but it requires a 
serial line bit rate of 115,200 baud whereas the RRC unit can only go up to 
57,600.  It looks like the W2 will be the answer since its bit rate is only 
9600 baud.

Please excuse the bandwidth.

73

Doug  VE3MV
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Re: [Elecraft] K3 stopped communicating

[Dick Dievendorff]

A 67? Must be a VM guy. I grew up on MFT

Try an alternate USB to Serial adapter. That's the easiest to replace. 

Dick

On Sep 6, 2011, at 14:57, stan levandowski  wrote:

> My K3 (#5244) mysteriously stopped working with HRD.  It had been 
> working FB for months.  HRD claimed it could not connect with the K3. 
> I then tried it with the K3 Utility and I got the following:
> 
> Xe211 Bootstrap loader did not echo a D
> MCU Firmware load failed
> 
> It's a K3/10 which I built and it works just fine except for this.  The 
> USB cable is the Elecraft product.
> 
> So far I've downloaded a 'fresh' copy of the utility, cold-started the 
> system, and reviewed the process.
> 
> I'm not particularly computer-literate when it comes to this new-fangled 
> stuff and I'm becoming less enthusiastic every day ;-)
> (Gimme a System 360/Mod 67, a bank of 2400 bpi tapes, and assembler 
> language any day!)
> 
> Any suggestions would be appreciated.  My gut feel is that it's in the 
> K3.  The sudden cessation of communication with HRD for no apparent 
> reason makes me think this way.
> 
> 73, Stan WB2LQF
> 
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Re: [Elecraft] KPA500

[Ron D'Eau Claire]

It's not just SSB that needs a good linear. As you move the amp out of its
linear range, special keying shaping becomes more important if you don't to
generate clicks heard across the band. Typically, it's necessary to soften
up the keyed driving rig since Class C will drastically steepen both the
make and break. 

Another issue is that modern rigs and amps like the KPA500 (and K3) have
fixed-tuned output filters that become increasingly inefficient when the
power is pushed above or below the design value because the impedance of the
amplifier changes. Older rigs that required tuning the output (dipping the
final plate current/adjusting loading for desired current at the dip)
allowed the operator to adjust for the impedance change. 

It's not often noticed when reducing power below the design value because
few will notice if the current demand of the finals only drops 20% or 30%
when the power is reduced by 50%. But going higher in power quickly pushes
the finals out of their linear range toward saturation. Vacuum tubes would
do the same is pushed hard enough, but have a much wider working range that
is usually limited only by the heat it has to dissipate. Solid state amps
more quickly saturate, unable to draw the current on peaks needed to stay
linear. That's one reason why rigs running >100 watts invariably use a
higher voltage than the common 13VDC on the finals. 

Free 1625's in the 1950's?? Sheesh, I had to pay 10 cents each for them! 

73, 

Ron AC7AC



-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Guy Olinger K2AV
Sent: Tuesday, September 06, 2011 10:25 AM
To: Jon K Hellan
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500

There ya go, the drive-it-until-it-smokes instinct.

That WORKS on CW .  as long as it doesn't fault, or burn something,
because class C and CW get along well together.  BUT SSB cannot exceed the
** LINEAR ** range of the amplifier without splatter, which means
drive-it-until-it-smokes always generates splatter.  ANY amplifier can
generate CW power well beyond the linear range, 1) if the power supply will
supply it, 2) if the device does not burn up because of inability to
dissipate all the heat (and remember that solid state devices can have
runaway failures where they lose control of current before the current
carrying elements burn), and 3) if the amp does not have a fault system to
prevent the previous.

I can tune up my 3-1000Z monster to 2500 watts, too, (power supply is 5 kV,
2 amps CCS move-it-with-a-hand-truck monster) but if I do, it's gone WAY,
WAY, WAY off linear and spreads SSB up and down 10.  The huge range overkill
for a 1500 watt legal limit is to have the 1500 watt signal WELL down into
the linear range, it's not to run 2500 watts.  The double overkill 2 amp CCS
is to make sure that contesting does not burn it up, make it wheeze, or ever
come anywhere near close.  And the original owner may have been running more
than one amp with it.

I would have been quite happy enough with 1 amp CCS, but the total overkill
came with it when I bought it.

The KPA500 comes with internal over-range, that you can't get at because of
the fault system.  Elecraft is very well aware of ham radio's queer
self-destructive predilections and trying for maximum smoke (what a telling
Freudian clue in that idiom!).  AND also well aware that SSB does not
tolerate that.  They have their technical reputation to mind, and also know
that the outcome of "maximum smoke" usually gets shamelessly blamed on the
manufacturer.

In high school days we used to do drive-it-until-it-smokes with WWII surplus
ARC-5 transmitters, and could get 500 watts out of a pair of 1625's (two
twelve volt filament 807's in series to run off military 24 volt battery
systems).  We had a near inexhaustible supply of FREE 1625's and enjoyed
watching the tube envelopes and anodes melt holes in them.  Kind of like
fireworks without the explosion.

But the 1625's were free.  KPA500 and innards not exactly free...

Melting down 1625's WAS fun, but when it comes down to trying to hear
someone in an SSB contest, one could wish that every amp had the shutdowns
so people could NOT drive their amps into non-linearity and put all those
unnecessarily broad signals on the band.  Thank you Elecraft for putting
some linear range in the amp that people can't get at.

73, Guy.

On Tue, Sep 6, 2011 at 4:31 AM, Jon K Hellan  wrote:

> On 09/05/2011 11:34 PM, Lyle Johnson wrote:
> > Yes, 500 watts PEP regardless of mode.  This is thus 500W RTTY/FM/CW
> > (key down :-) etc.
>
> Excellent, but then why limit it to 500 W in low duty cycle modes?
> Shouldn't it be capable of more? Are the intermod issues?
>
> Jon
>
>
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[Elecraft] K3 stopped communicating

[stan levandowski]

My K3 (#5244) mysteriously stopped working with HRD.  It had been 
working FB for months.  HRD claimed it could not connect with the K3. 
I then tried it with the K3 Utility and I got the following:

Xe211 Bootstrap loader did not echo a D
MCU Firmware load failed

It's a K3/10 which I built and it works just fine except for this.  The 
USB cable is the Elecraft product.

So far I've downloaded a 'fresh' copy of the utility, cold-started the 
system, and reviewed the process.

I'm not particularly computer-literate when it comes to this new-fangled 
stuff and I'm becoming less enthusiastic every day ;-)
(Gimme a System 360/Mod 67, a bank of 2400 bpi tapes, and assembler 
language any day!)

Any suggestions would be appreciated.  My gut feel is that it's in the 
K3.  The sudden cessation of communication with HRD for no apparent 
reason makes me think this way.

73, Stan WB2LQF

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Re: [Elecraft] K3 - Macbook Pro

[Mike]

Thanks for the tip Dave and Stephan. I just ordered an iMic.

Mike

On 9/6/2011 4:26 PM, David Guernsey wrote:
> I have a Mac Mini with only one audio port.  I use a iMic USB sound card and 
> it 
> works very well for fldigi and cocoamodem with my K3 and MacMini.
> 73 de Dave KJ6CBS
> -
> *From:* Mike 
> *To:* Elecraft List 
> *Sent:* Tuesday, September 6, 2011 1:17 PM
> *Subject:* [Elecraft] K3 - Macbook Pro
>
> I've been using AFSK A for RTTY and PSK. I got a MacBook Pro yesterday, and 
> it has
> only 1 audio jack, which may be either input or output. I'll be running Win7 
> in
> Parallels for my ham stuff.
>
> Is there an external sound card that will work? I found one, but it requires 
> external
> power.
>
> How about serial ports? Will USB/serial converters work?
>
> What's your solution?
>
> I'd love to talk to any Mac programmers out there, off list.
>
> 73, Mike NF4L
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>

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Re: [Elecraft] K3 - Macbook Pro

[Alan D. Wilcox]

Mike,
The iMic works great with the MB Pro. See 
http://wilcoxengineering.com/projects/amateur-projects/44-psk31-k2 for 
my setup with using Parallels as well.
Cheers,
Alan

Alan D. Wilcox, W3DVX (K2-5373, K3-40)
570-321-1516
http://WilcoxEngineering.com
http://eBookEditor.net
https://www.smashwords.com/books/view/28062?ref=awilcox
Williamsport, PA 17701


On 9/6/11 4:17 PM, Mike wrote:
> I've been using AFSK A for RTTY and PSK. I got a MacBook Pro yesterday, and 
> it has
> only 1 audio jack, which may be either input or output. I'll be running Win7 
> in
> Parallels for my ham stuff.
>
> Is there an external sound card that will work? I found one, but it requires 
> external
> power.
>
> How about serial ports? Will USB/serial converters work?
>
> What's your solution?
>
> I'd love to talk to any Mac programmers out there, off list.
>
> 73, Mike NF4L
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Re: [Elecraft] K3 - Macbook Pro

[Mike]

Thanks, Daniel.

Interesting. A bit more than the iMic, but it does more.

73, Mike NF4L

On 9/6/2011 4:28 PM, Daniel Brown wrote:
> On Tue, Sep 6, 2011 at 4:17 PM, Mike  wrote:
>> I've been using AFSK A for RTTY and PSK. I got a MacBook Pro yesterday, and 
>> it has
>> only 1 audio jack, which may be either input or output. I'll be running Win7 
>> in
>> Parallels for my ham stuff.
>>
>> Is there an external sound card that will work? I found one, but it requires 
>> external
>> power.
>>
>> How about serial ports? Will USB/serial converters work?
> I've had good luck with the Tigertronics Signalink on my mac.
>
>
>
>
>


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Re: [Elecraft] Confusion on Roofing Filters

[Lyle Johnson]

No, the KX3 uses a completely different architecture than the K3.

73,

Lyle KK7P

> ...Will the KX3 use the same roofing filter series as the K3?

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Re: [Elecraft] Confusion on Roofing Filters

[w0ih]

Wayne,

Thanks for the very prompt reply last week to my query.

So now I have another question concerning roofing filters.  Will the KX3 use
the same roofing filter series as the K3?  

I added a 2.1 kHz filter in my K3 and found it very effective (after a bit
of learning!).  Since then, I've wanted to upgrade the 5 pole filter that I
have in my K3 to an 8 pole.   Can I put the 5 pole that I pull from the K3
into the KX3?

Mike



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Re: [Elecraft] K3 - Macbook Pro

[Stephen Prior]

I'll second that.  The iMic is a respectable performer.  My MacBook has both
audio in and out sockets but I prefer to use the iMic.

73, Stephen G4SJP


On 6 September 2011 21:26, David Guernsey  wrote:

> I have a Mac Mini with only one audio port.  I use a iMic USB sound card
> and it works very well for fldigi and cocoamodem with my K3 and MacMini.
>
>
> 73 de Dave KJ6CBS
>
>
> 
> From: Mike 
> To: Elecraft List 
> Sent: Tuesday, September 6, 2011 1:17 PM
> Subject: [Elecraft] K3 - Macbook Pro
>
> I've been using AFSK A for RTTY and PSK. I got a MacBook Pro yesterday, and
> it has
> only 1 audio jack, which may be either input or output. I'll be running
> Win7 in
> Parallels for my ham stuff.
>
> Is there an external sound card that will work? I found one, but it
> requires external
> power.
>
> How about serial ports? Will USB/serial converters work?
>
> What's your solution?
>
> I'd love to talk to any Mac programmers out there, off list.
>
> 73, Mike NF4L
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Re: [Elecraft] K3 - Macbook Pro

[Daniel Brown]

On Tue, Sep 6, 2011 at 4:17 PM, Mike  wrote:
> I've been using AFSK A for RTTY and PSK. I got a MacBook Pro yesterday, and 
> it has
> only 1 audio jack, which may be either input or output. I'll be running Win7 
> in
> Parallels for my ham stuff.
>
> Is there an external sound card that will work? I found one, but it requires 
> external
> power.
>
> How about serial ports? Will USB/serial converters work?

I've had good luck with the Tigertronics Signalink on my mac.





-- 
Dan Brown
br...@brauhaus.org
http://www.brauhaus.org
http://www.dc-beer.org
http://photos.brauhaus.org
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Re: [Elecraft] K3 - Macbook Pro

[David Guernsey]

I have a Mac Mini with only one audio port.  I use a iMic USB sound card and it 
works very well for fldigi and cocoamodem with my K3 and MacMini.

 
73 de Dave KJ6CBS



From: Mike 
To: Elecraft List 
Sent: Tuesday, September 6, 2011 1:17 PM
Subject: [Elecraft] K3 - Macbook Pro

I've been using AFSK A for RTTY and PSK. I got a MacBook Pro yesterday, and it 
has 
only 1 audio jack, which may be either input or output. I'll be running Win7 in 
Parallels for my ham stuff.

Is there an external sound card that will work? I found one, but it requires 
external 
power.

How about serial ports? Will USB/serial converters work?

What's your solution?

I'd love to talk to any Mac programmers out there, off list.

73, Mike NF4L
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[Elecraft] K3 - Macbook Pro

[Mike]

I've been using AFSK A for RTTY and PSK. I got a MacBook Pro yesterday, and it 
has 
only 1 audio jack, which may be either input or output. I'll be running Win7 in 
Parallels for my ham stuff.

Is there an external sound card that will work? I found one, but it requires 
external 
power.

How about serial ports? Will USB/serial converters work?

What's your solution?

I'd love to talk to any Mac programmers out there, off list.

73, Mike NF4L
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Re: [Elecraft] [KPA500] - 144MHz Version?

[Bill K9YEQ]

Yes,

I would.  Wouldn't require all the space either and would have a little room
to spare.  Auto tuner for 2m?  :-)

73,
Bill
K9YEQ

-Original Message-

I was recently studying the schematics of the KPA500 and looked at the
specification of the VRF2933 devices which are used in the RF deck of the
amplifier. I noted that the devices are rated to 150MHz which made  me think
a 144Mhz version of the KPA500 would be a nice addition for a K3 equipped
with a K144XV 2m option (or indeed any 144MHz transceiver). Nearly all the
existing KPA500 metalwork, PSU and front panel PCB (with different firmware
and no band buttons) could be carried over with a different RF deck (perhaps
using the same VRF2933 devices and heatsink). A 2m version could potentially
be lower cost as the switchable complex LPF arrangement of the HF/6M KPA500
would not be required. The RF deck aside, the R&D costs would be low, using
much of the already proven KPA500 hardware. The 500W output is ideal for
here in the UK where the power limit is 400W. Even a 432Mhz version could be
created although the VRF2933 devices would have to be replaced with
something else - I suspect the demand for this 70cm version would be far
lower than that for 144MHz and would not be cost effective for Elecraft.

I currently use a Henry Tempo 2002 using two Eimac 8874 on 144MHz. I think
that a 144MHz KPA500 would be cheaper than obtaining two replacement tubes
for my existing amp! I would certainly be very interested in the purchase of
a 144MHz KPA500 (KPAV500 ?) - anyone else?


73

Allan
GM4ZUK


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[Elecraft] [K3]

[Alastair Couper]

Regarding the use of filters on RTTY:

> None of that is surprising given the nature of cascaded narrow filters

Has anyone seen much difference between the FIR and IIR filters?
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[Elecraft] [K3][Speaker Out interaction with Line Out?]

[Edward R. Cole]

Sounds like you still have some RF getting in on the speaker cables 
or maybe on the line-out cables.  How much power do you run in 
JT-65HF?  I run JT-65 on 144-MHz at 1400w with no issues like you 
have.  I do not use a powered/amplified speaker, just and old 
National speaker console from the 1950's with plain speaker wire.  My 
line-in and line-out cables are standard shielded audio patch cords 
from RS. But then I only run 1.5mw to my transverter on 28-MHz, so no 
significant RF coming out of the K3.

A quick test would be adding a .001 uF disc. ceramic bypass cap from 
the center wire to ground at the K3 on the speaker.  The toroid 
apparently is helping according to what you write.  Maybe shielded 
speaker wire would help?  I would guess the audio is already 
transformer coupled to the K3 speaker output so an isolation 
transformer probably would not help.  I do think this looks like RFI.


73, Ed - KL7UW, WD2XSH/45
==
BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-60w, 3400-?
DUBUS Magazine USA Rep dubus...@gmail.com
==

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Re: [Elecraft] [KPA500] - 144MHz Version?

[Lew Phelps K6LMP]

If a 2-meter version of the KPA500 ever gets to the drawing-board stage,
I'd vote for two-band capability, adding 6 meters; this would be ideal
for VHF/UHF contesting, as it would provide a single amp for the two most-used 
bands in those contests. I think that trying to stretch it to 432 mhz would
be a much more difficult design challenge, since it would require more 
modification to the circuitry than substituting a different power transistor,
whereas you might be able to accommodate 2 meters with the existing board layout
or something similar.

Lew K6LMP


On Sep 6, 2011, at 7:48 AM, Allan G Duncan wrote:

> I was recently studying the schematics of the KPA500 and looked at the
> specification of the VRF2933 devices which are used in the RF deck of the
> amplifier. I noted that the devices are rated to 150MHz which made  me think
> a 144Mhz version of the KPA500 would be a nice addition for a K3 equipped
> with a K144XV 2m option (or indeed any 144MHz transceiver). Nearly all the
> existing KPA500 metalwork, PSU and front panel PCB (with different firmware
> and no band buttons) could be carried over with a different RF deck (perhaps
> using the same VRF2933 devices and heatsink). A 2m version could potentially
> be lower cost as the switchable complex LPF arrangement of the HF/6M KPA500
> would not be required. The RF deck aside, the R&D costs would be low, using
> much of the already proven KPA500 hardware. The 500W output is ideal for
> here in the UK where the power limit is 400W. Even a 432Mhz version could be
> created although the VRF2933 devices would have to be replaced with
> something else - I suspect the demand for this 70cm version would be far
> lower than that for 144MHz and would not be cost effective for Elecraft.
> 
> I currently use a Henry Tempo 2002 using two Eimac 8874 on 144MHz. I think
> that a 144MHz KPA500 would be cheaper than obtaining two replacement tubes
> for my existing amp! I would certainly be very interested in the purchase of
> a 144MHz KPA500 (KPAV500 ?) - anyone else?
> 
> On a slightly different matter, I note that the KPA500 front panel PCB
> schematic also has an unused "2nd RF deck" connection - perhaps for a future
> KPA1000 utilising two of the KPA500 modules combined?
> 
> 73
> 
> Allan
> GM4ZUK
> 
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Re: [Elecraft] KI02

[Don Wilhelm]

David,

Remove the KIO2 cable from the Control Board and try those measurements 
again.
Compare with your other K2 to obtain a sanity check.

It may be that you had a surge that damaged the pin 26 input of CB U6.

Are you certain PORT is set to ON?

73,
Don W3FPR

On 9/6/2011 12:50 PM, David N. wrote:
> Hello All
> My KI02 is not communicating with the computer.
> I put it in my other K2 and it works ok.
> I found that I do not have the 5 volts at the RXD Line (Pin 26) U6 Actual 
> (.54v)
> I found that I have 1.37 volts at TXD Line (Pin 25) U6 when it should be 0
> I have the 5 volts going into the resitor pack rp7 Pin 3 but not at pin 4
> So I figured that the pack is opened but I get a shorted reading between pin 
> 3 and pin 4
> of rp7. Schematic gives the 2 pins 33k I do not know it this is correct. I do 
> not see any other parallel circuits across these pins.
> But not knowing the make up of the 2 IC's, I cannot know if this is normal.
> Thanks David KR4OW
>
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[Elecraft] K3 Using IC-SM5 Mic

[w0ih]

I'm trying to get my Icom IC-SM5 mic to work with the K3.  I've setup the
"FP:L Bias" on the K3 and there is 4.98 volts on Pin 1 of the K3 mic
connector.  No output from the rig at all (varied the pot on the bottom of
the mic and the rig mic gain).

I would think that 5v should be sufficient for the SM5 mic.

I tried putting in a 1k resistor from pin 6 (8v) to a 2.2uf cap, but then I
just get feedback (full output) into a dummy load.

Anyone have any ideas?

Mike

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Re: [Elecraft] KPA500

[Guy Olinger K2AV]

There ya go, the drive-it-until-it-smokes instinct.

That WORKS on CW .  as long as it doesn't fault, or burn something,
because class C and CW get along well together.  BUT SSB cannot exceed the
** LINEAR ** range of the amplifier without splatter, which means
drive-it-until-it-smokes always generates splatter.  ANY amplifier can
generate CW power well beyond the linear range, 1) if the power supply will
supply it, 2) if the device does not burn up because of inability to
dissipate all the heat (and remember that solid state devices can have
runaway failures where they lose control of current before the current
carrying elements burn), and 3) if the amp does not have a fault system to
prevent the previous.

I can tune up my 3-1000Z monster to 2500 watts, too, (power supply is 5 kV,
2 amps CCS move-it-with-a-hand-truck monster) but if I do, it's gone WAY,
WAY, WAY off linear and spreads SSB up and down 10.  The huge range overkill
for a 1500 watt legal limit is to have the 1500 watt signal WELL down into
the linear range, it's not to run 2500 watts.  The double overkill 2 amp CCS
is to make sure that contesting does not burn it up, make it wheeze, or ever
come anywhere near close.  And the original owner may have been running more
than one amp with it.

I would have been quite happy enough with 1 amp CCS, but the total overkill
came with it when I bought it.

The KPA500 comes with internal over-range, that you can't get at because of
the fault system.  Elecraft is very well aware of ham radio's queer
self-destructive predilections and trying for maximum smoke (what a telling
Freudian clue in that idiom!).  AND also well aware that SSB does not
tolerate that.  They have their technical reputation to mind, and also know
that the outcome of "maximum smoke" usually gets shamelessly blamed on the
manufacturer.

In high school days we used to do drive-it-until-it-smokes with WWII surplus
ARC-5 transmitters, and could get 500 watts out of a pair of 1625's (two
twelve volt filament 807's in series to run off military 24 volt battery
systems).  We had a near inexhaustible supply of FREE 1625's and enjoyed
watching the tube envelopes and anodes melt holes in them.  Kind of like
fireworks without the explosion.

But the 1625's were free.  KPA500 and innards not exactly free...

Melting down 1625's WAS fun, but when it comes down to trying to hear
someone in an SSB contest, one could wish that every amp had the shutdowns
so people could NOT drive their amps into non-linearity and put all those
unnecessarily broad signals on the band.  Thank you Elecraft for putting
some linear range in the amp that people can't get at.

73, Guy.

On Tue, Sep 6, 2011 at 4:31 AM, Jon K Hellan  wrote:

> On 09/05/2011 11:34 PM, Lyle Johnson wrote:
> > Yes, 500 watts PEP regardless of mode.  This is thus 500W RTTY/FM/CW
> > (key down :-) etc.
>
> Excellent, but then why limit it to 500 W in low duty cycle modes?
> Shouldn't it be capable of more? Are the intermod issues?
>
> Jon
>
>
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[Elecraft] WTB: KSB2

[TJ Campie]

I'm interested in buying a K2 Sideband module, KSB2 - preferably still in
kit form.  Paypal required, just got a bonus gift card from work :)

TJ W0EA
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Re: [Elecraft] KPA500

[Jim Brown]

On 9/6/2011 1:31 AM, Jon K Hellan wrote:
> Excellent, but then why limit it to 500 W in low duty cycle modes?
> Shouldn't it be capable of more? Are the intermod issues?

500W is a published minimum performance spec, not a hard limit.  The 
actual limit is somewhat variable, depending on the efficiency of the 
output stage. My KPA500 gives me  550W out on 6M in keydown modes, 
slightly more on CW and SSB; and 650-675W on the HF bands in all modes. 
Firmware control limits the output to about 700W, a limit that was 
chosen on the basis of IMD performance and device longevity.

73, Jim K9YC
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[Elecraft] KI02

[David N.]

Hello All 
My KI02 is not communicating with the computer. 
I put it in my other K2 and it works ok. 
I found that I do not have the 5 volts at the RXD Line (Pin 26) U6 Actual 
(.54v) 
I found that I have 1.37 volts at TXD Line (Pin 25) U6 when it should be 0 
I have the 5 volts going into the resitor pack rp7 Pin 3 but not at pin 4 
So I figured that the pack is opened but I get a shorted reading between pin 3 
and pin 4 
of rp7. Schematic gives the 2 pins 33k I do not know it this is correct. I do 
not see any other parallel circuits across these pins. 
But not knowing the make up of the 2 IC's, I cannot know if this is normal. 
Thanks David KR4OW 
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Re: [Elecraft] CK722 transistor

[ke9uw]

My first power transistor was a 2N35. We had to check them out from the EE
storeroom for the lab of an EE course at the U of Illinois, Urbana. I forget
what the exercise was about, it went well, but I mostly remember the plastic
box the transistor came in and the sheet I had to "sign" for it.

-
Chuck, KE9UW
--
View this message in context: 
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Re: [Elecraft] CK722 transistor

[ke9uw]

I bought my first, 3 of them from Allied Radio in the late '50s. I made a
three stage IF strip amplifier with them. As I remember, they were packaged
in thin plastic tubes with a plastic cork, skinny, taller than they were
wide and with long leads...maybe an inch long. They were a buck each.
Memories.
The IF amp worked...pretty well...

-
Chuck, KE9UW
--
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[Elecraft] K6JSS/7 from Oregon

[Kevin Rock]

My first run as K6JSS went OK.  I ran for a little under an hour and got a  
couple.  I will try again tomorrow at 1500z.
73,
   Kevin.  KD5ONS
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Re: [Elecraft] [K2] Lost 80m recieve.

[Don Wilhelm]

Al,

Yes, the solder reflow should fix it. relay K15 must have a path to K14 
before K13 is connected, and K13 then connects C72 for 80 meters - the 
whole path must be intact.
Sounds like you got it.

73,
Don W3FPR

On 9/6/2011 11:16 AM, Alan Davenport wrote:
> Don,
>   
>  No, the relays are not damaged. I was extra careful with them as the 
> build instructions said to be.
>   
>   I just re-flowed the solder on C72 and all K13 pins. The rig is now 
> working on all bands and the VCO is in spec on all bands EXCEPT 80m. 80 was 
> working briefly and just quit as I was typing my response. I switched bands 
> and when I switched back to 80 it was dead again. Direct frequency entry does 
> not help.
>   
> I  think I had two seperate issues. 80M had been dead since I was away on 
> vacation this June and the other bands were working fine. I do not know when 
> they went dead but I do know I spent 7 weeks at a remote cabin and I used the 
> K2 extensively on all bands up there. 80 went dead while I was there. (3 days 
> after I put up a dipole to get on a net!)
> .
>   
> I just took it apart again, I reflowed the solder on all relays for 80m, 
> K2,K3,K8,K13 and also K14&  K15 as well while I had it apart. 80m is 
> currently working as are all other bands. I have switched bands many times 
> and 80m continues to work. Looks like I may have fixed it with your help. As 
> always Don, thank you very much for taking the time to help me and everyone 
> else who asks for help.
>   
>  Take care,
>Al, W2GZN
>
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Re: [Elecraft] [KPA500] - 144MHz Version?

[Udo Langenohl - DK5YA]

Allan G Duncan wrote:
> I was recently studying the schematics of the KPA500 and looked at the
> specification of the VRF2933 devices which are used in the RF deck of the
> amplifier. I noted that the devices are rated to 150MHz which made  me think
> a 144Mhz version of the KPA500 would be a nice addition for a K3 equipped
> with a K144XV 2m option (or indeed any 144MHz transceiver).

If it's goin' to be at 2KW version it'll be mine.

Just the 2 cents of an insane moonbouncer...

Udo, DK5YA


-- 
**
Webs by DK5YA:   *
http://www.mmmonvhf.de/  [editor]*
http://www.vhfdx.de/ [owner] *
http://www.palekastro.de/[owner] *
http://www.solweb.de/[owner] *
http://www.spessartwetter.de/[owner] *
**

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Re: [Elecraft] [K2] Lost 80m recieve.

[Alan Davenport]

Don,
 
    No, the relays are not damaged. I was extra careful with them as the build 
instructions said to be. 
 
 I just re-flowed the solder on C72 and all K13 pins. The rig is now 
working on all bands and the VCO is in spec on all bands EXCEPT 80m. 80 was 
working briefly and just quit as I was typing my response. I switched bands and 
when I switched back to 80 it was dead again. Direct frequency entry does not 
help.
 
I  think I had two seperate issues. 80M had been dead since I was away on 
vacation this June and the other bands were working fine. I do not know when 
they went dead but I do know I spent 7 weeks at a remote cabin and I used the 
K2 extensively on all bands up there. 80 went dead while I was there. (3 days 
after I put up a dipole to get on a net!)
.
 
I just took it apart again, I reflowed the solder on all relays for 80m, 
K2,K3,K8,K13 and also K14 & K15 as well while I had it apart. 80m is currently 
working as are all other bands. I have switched bands many times and 80m 
continues to work. Looks like I may have fixed it with your help. As always 
Don, thank you very much for taking the time to help me and everyone else who 
asks for help.
 
    Take care,
  Al, W2GZN
From: Don Wilhelm 
To: Alan Davenport 
Cc: "elecraft@mailman.qth.net" 
Sent: Tuesday, September 6, 2011 9:34 AM
Subject: Re: [Elecraft] [K2] Lost 80m recieve.

Al,

With that new information, I can say that the problem is in the VFO Range 
Selection area.  It could be relay(s) or it could be capacitors.  Do you have 
soldering iron burned cases on any of K13, K14 or K15?  If so, those relays 
should be replaced since that is the most likely problem.

If the relay cases look good, then it is time to measure the relay contacts 
with your ohmmeter.  Use the schematic (RF Board sheet 2 to determine the pins 
associated with the set and reset state of the relays - they are shown in the 
reset state.  Then switch to each band and consult the chart at the upper left 
of the Schematic Key page to see which of relays K13, K14 and K15 are set for 
that band.  Confirm with your ohmmeter that there is continuity between the 
correct pins of the relay.  Continue for other bands until you have confirmed 
that the proper relays have been set, and also check that those which are 
supposed to be reset are actually in that state.

It is also possible that you have a bad output from the I/O Controller and the 
relay is not getting the pulse to set, but that is a rare occurrence.

73,
Don W3FPR
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[Elecraft] K6JSS/7 from Oregon

[Kevin Rock]

K6JSS/7 will be on the air from Oregon within the next ten minutes.  I'll  
be running on 20 meters at or near 14060 kHz.  I plan to run for an hour  
while I read and work contacts.  I will try to be on each morning near  
1500z for the alloted time period.
73,
   Kevin.  KD5ONS
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[Elecraft] [KPA500] - 144MHz Version?

[Allan G Duncan]

I was recently studying the schematics of the KPA500 and looked at the
specification of the VRF2933 devices which are used in the RF deck of the
amplifier. I noted that the devices are rated to 150MHz which made  me think
a 144Mhz version of the KPA500 would be a nice addition for a K3 equipped
with a K144XV 2m option (or indeed any 144MHz transceiver). Nearly all the
existing KPA500 metalwork, PSU and front panel PCB (with different firmware
and no band buttons) could be carried over with a different RF deck (perhaps
using the same VRF2933 devices and heatsink). A 2m version could potentially
be lower cost as the switchable complex LPF arrangement of the HF/6M KPA500
would not be required. The RF deck aside, the R&D costs would be low, using
much of the already proven KPA500 hardware. The 500W output is ideal for
here in the UK where the power limit is 400W. Even a 432Mhz version could be
created although the VRF2933 devices would have to be replaced with
something else - I suspect the demand for this 70cm version would be far
lower than that for 144MHz and would not be cost effective for Elecraft.

I currently use a Henry Tempo 2002 using two Eimac 8874 on 144MHz. I think
that a 144MHz KPA500 would be cheaper than obtaining two replacement tubes
for my existing amp! I would certainly be very interested in the purchase of
a 144MHz KPA500 (KPAV500 ?) - anyone else?

On a slightly different matter, I note that the KPA500 front panel PCB
schematic also has an unused "2nd RF deck" connection - perhaps for a future
KPA1000 utilising two of the KPA500 modules combined?

73

Allan
GM4ZUK

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Re: [Elecraft] [K2] Lost 80m recieve.

[Don Wilhelm]

Al,

Just to add a little to the "sensibility" of the VCO (R30) voltage readings:
The range of voltages possible is from 0 to about 8 volts.  Your high 
voltage readings indicate that the PLL is trying to increase the voltage 
to the varactors in order to reduce the capacity - and the op amp has 
simply "run out of steam" and can go no higher.  Voltages between 1.5 
and 7 volts are workable, but outside that range, the varactors are not 
linear.

A higher than normal voltage means there is excess capacity in the VFO 
range select controls, and a low voltage means that there is not enough 
capacity in the circuit.
Relays K13, K14, and K15 control which fixed capacitors are placed in 
the circuit, and are in parallel with varactors D23 through D26.

On 9/6/2011 9:03 AM, Alan Davenport wrote:
> I just performed the VCO voltage checks you asked for and here are the 
> results. It looks like it was worse than I thought. 40,30,20 and 12 meteres 
> are all within spec. The other bands are as follows:
>   
> 3.5 MHz = no output
> 4.0 MHz = no output
> 18.0 = 7.94v
> 18.2 = 7.94v
> 21.0, 21.45, 28.0 and 28.8 are all also fixed at 7.94V.
>   
> I never noticed the other bands had gone dead as I operate mostly on 40m CW 
> some operation on 20m and 30m.  "When are the higher bands ever going to open 
> up?" hihi
>
>
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[Elecraft] [K3][Speaker Out interaction with Line Out?]

[Kyle Smith]

Hi, I've been a happy camper with my K3-100F/P3 combo for many months now.  I 
think I've got #5631, if memory serves.  My purpose in writing is to determine 
if what I'm experiencing with noise and diminished volume while in Data-A mode 
on Line out, which goes to the sound card in my US Interface Navigator, seen on 
JT65-HF's waterfall, when my amplified speakers are connected to Speaker out, 
and not otherwise, is considered nominal.  It doesn't have a serious impact on 
how I operate, since the hearing the received audio is not that important while 
using a.digital mode, e.g., JT65-HF, and I hear the signal from the K3's 
internal speaker, without the loss of volume and noise.  Could it be as simple 
as an impedance mismatch from the speakers, and noise from the internal audio 
amplifier feeding back into the speaker out jack?  The amplified speakers are 
nothing specially made for use with an HF transceiver.  The only thing I've 
every done to the speakers, is to pass the audio in c
 able, which is just unshielded small gauge speaker wire, about ten times 
through an RFI toroid, which eliminated the distortion heard when I would tx 
into a relatively high VSWR.  After a quick tune, the distortion went away, at 
any rate.  

Could I use an audio isolation transformer, and/or optical isolation diodes to 
correct this behavior?  I've heard that the line out jack already passes 
through an audio isolation transformer, but perhaps the speaker out jack is not 
so isolated?  I routinely read this reflector in periodic digest mode, so 
excuse me if it takes sometime to reply to any queries or suggestions.

I thank all the people who make this reflector such an interesting read 
everyday, and of course the good folks at Elecraft, who make such exceptional 
equipment available to hams at such attractive price points.  My previous two 
rigs, not counting my HeathKit years, were a TS-450SAT and then an FT-897D.  
You can imagine what it was like for me to use the K3, in contrast to the 
equipment I had become accustomed to using.  My only regret is that I didn't 
get all the mods installed by the factory with my initial purchase.  I have 
several mods that I've since purchased, that I'm just too scared to install, 
and cause anything to go wrong. Somehow I am able to get by without a DVR and 
the 2meter option, and assorted filters.  One day I'll install them when it 
feels right.  Now I await the specifications of the new high powered tuner, 
although I very rarely have any need for even the 100 watts from the K3.  And 
my current SGC SG-230 coupler does every thing except for 6 meters and ab
 ove; but then I have separate antennas for those bands, so it would be a nifty 
thing to have QRO capability, but then I've never had more than 100 watts, and 
somehow I make it through the day.  The KX3, however, is a must have device.  I 
try not to think about it too much, because I can't imagine how long it will 
take to get passed the initial backlog of orders and finally get one in my 
hands.  It makes me tense to even think about the waiting period.  On the other 
hand, maybe Elecraft will be ramped up at the outset and pleasantly surprise us 
all with a KX3 in time for Christmas.  That would be sweet.

--
73, de Kyle AG2F
airf...@me.com
Living with just the right latitude at EL94fp31xr
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Re: [Elecraft] [K2] Lost 80m recieve.

[Don Wilhelm]

Al,

With that new information, I can say that the problem is in the VFO 
Range Selection area.  It could be relay(s) or it could be capacitors.  
Do you have soldering iron burned cases on any of K13, K14 or K15?  If 
so, those relays should be replaced since that is the most likely problem.

If the relay cases look good, then it is time to measure the relay 
contacts with your ohmmeter.  Use the schematic (RF Board sheet 2 to 
determine the pins associated with the set and reset state of the relays 
- they are shown in the reset state.  Then switch to each band and 
consult the chart at the upper left of the Schematic Key page to see 
which of relays K13, K14 and K15 are set for that band.  Confirm with 
your ohmmeter that there is continuity between the correct pins of the 
relay.  Continue for other bands until you have confirmed that the 
proper relays have been set, and also check that those which are 
supposed to be reset are actually in that state.

It is also possible that you have a bad output from the I/O Controller 
and the relay is not getting the pulse to set, but that is a rare 
occurrence.

73,
Don W3FPR

On 9/6/2011 9:03 AM, Alan Davenport wrote:
> I just performed the VCO voltage checks you asked for and here are the 
> results. It looks like it was worse than I thought. 40,30,20 and 12 meteres 
> are all within spec. The other bands are as follows:
>   
> 3.5 MHz = no output
> 4.0 MHz = no output
> 18.0 = 7.94v
> 18.2 = 7.94v
> 21.0, 21.45, 28.0 and 28.8 are all also fixed at 7.94V.
>   
> I never noticed the other bands had gone dead as I operate mostly on 40m CW 
> some operation on 20m and 30m.  "When are the higher bands ever going to open 
> up?" hihi
>   
>  73 de Al, W2GZN
>
>
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Re: [Elecraft] [K2] Lost 80m recieve.

[Alan Davenport]

I just performed the VCO voltage checks you asked for and here are the results. 
It looks like it was worse than I thought. 40,30,20 and 12 meteres are all 
within spec. The other bands are as follows:
 
3.5 MHz = no output
4.0 MHz = no output
18.0 = 7.94v
18.2 = 7.94v
21.0, 21.45, 28.0 and 28.8 are all also fixed at 7.94V.
 
I never noticed the other bands had gone dead as I operate mostly on 40m CW 
some operation on 20m and 30m.  "When are the higher bands ever going to open 
up?" hihi
 
    73 de Al, W2GZN

From: Alan Davenport 
To: "d...@w3fpr.com" 
Cc: "elecraft@mailman.qth.net" 
Sent: Tuesday, September 6, 2011 8:33 AM
Subject: Re: [Elecraft] [K2] Lost 80m recieve.

Good Morning Don,
 
 Well it certainly looks like it is a VCO issue. On all bands except 80m, 
it is working correctly however on 80m here are the results:
 
3.5 MHz = 11038.61 MHz
4.0 MHz = 11038.51 MHz
 
Subtracting 4913 KHz gives me  ~ 6125.6 KHz. 
 
No wonder 80m isn't working. What surprises me is that this issue is confined 
to just one band. What is your suggestion on what to check?
 
    Thank you again Don,
 73 de Al, W2GZN
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Re: [Elecraft] [K2] Lost 80m recieve.

[Don Wilhelm]

Alan,

That sounds like you tuned down from 40 meters to the 80 meter band, and 
the VFO could go no lower than 11038 MHz.  If so, it is easy to fix - 
just do a direct frequency entry to any frequency in the 80 meter band.

If that does not fix it, then check the soldering on RF Board C72.  
Another possibility is a bad relay at K13, but if all other bands are 
OK, then the relay is quite low on the suspect list - but check the 
soldering at K13 pin 4 since that pin only switches in C72,

73,
Don W3FPR

On 9/6/2011 8:33 AM, Alan Davenport wrote:
> Good Morning Don,
>   
>   Well it certainly looks like it is a VCO issue. On all bands except 
> 80m, it is working correctly however on 80m here are the results:
>   
> 3.5 MHz = 11038.61 MHz
> 4.0 MHz = 11038.51 MHz
>   
> Subtracting 4913 KHz gives me  ~ 6125.6 KHz.
>   
> No wonder 80m isn't working. What surprises me is that this issue is confined 
> to just one band. What is your suggestion on what to check?
>   
>  Thank you again Don,
>   73 de Al, W2GZN
>
>
>
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Re: [Elecraft] [K2] Lost 80m recieve.

[Alan Davenport]

Good Morning Don,
 
 Well it certainly looks like it is a VCO issue. On all bands except 80m, 
it is working correctly however on 80m here are the results:
 
3.5 MHz = 11038.61 MHz
4.0 MHz = 11038.51 MHz
 
Subtracting 4913 KHz gives me  ~ 6125.6 KHz. 
 
No wonder 80m isn't working. What surprises me is that this issue is confined 
to just one band. What is your suggestion on what to check?
 
    Thank you again Don,
 73 de Al, W2GZN
 
 

From: Don Wilhelm 
To: Alan Davenport 
Cc: "elecraft@mailman.qth.net" 
Sent: Monday, September 5, 2011 9:04 PM
Subject: Re: [Elecraft] [K2] Lost 80m recieve.

Alan,

First of all, transmission at a fixed frequency of 3712 is indicative of a 
problem with the VCO/PLL.
Are the R30 (VCO voltage) values within range on all bands?  That is the 
starting point.

Next put the internal probe into TP1 and measure the frequency when the K2 is 
tuned to 3500, and also at 4000 kHz.  The measured frequency should be near 
4913 kHz above the frequency shown on the K2 display.

If the frequency is not correct, the K2 will transmit on the wrong frequency.

Give us the results from the above tests and we can proceed from there.

73,
Don W3FPR
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[Elecraft] KAT500 questions

[Frank Oppedijk]

Hi,

I'm planning antenna additions and have a question about the upcoming
KAT500.

I'm planning on using 2 antennas, at 2 physically separated locations, each
equipped with a remote KAT500. Both antennas can be switched to the same K3.
I understand the KAT500 will be able to receive frequency/band data from the
K3, and would like to use this feature for both antennas. (Thus, both ATUs
will be correctly tuned as soon as I QSY to a certain band, without the need
to send RF to both ATUs in order to let the RF sensing circuitry to its
thing...)

Will it be possible to have multiple remote KAT500s connected to the same K3
at the same time? (I guess another way of phrasing the question is: is there
only unidirectional data flow from K3 to KAT500, or do the K3 and KAT500
engage in bidirectional communication during tune-up [e.g. to enable the K3
to reduce power whilst the KAT500 is rattling its relays], just like the
KAT100 does?)

Also, I'm very interested in pricing and availability info. Surely, the
Waynes and Erics of this world have preliminary info, but knowing the way
these people keep the cards close to the chest, I'm afraid the only way of
this information getting onto the reflector would be one of them goofing up
and accidently posting data intended for private communication... :-)

Cheers,

Frank PA4N
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Re: [Elecraft] KPA500

[Jon K Hellan]

On 09/05/2011 11:34 PM, Lyle Johnson wrote:
> Yes, 500 watts PEP regardless of mode.  This is thus 500W RTTY/FM/CW
> (key down :-) etc.

Excellent, but then why limit it to 500 W in low duty cycle modes? 
Shouldn't it be capable of more? Are the intermod issues?

Jon

>
> If the amplifier gets too hot, it will let you know in a safe,
> non-spectacular way.
>
> 73,
>
> Lyle KK7P
>
>> I just received my KPA500 (s/n 376)  and am very pleased with it.   What is
>> the power limitation, if any, for operating the KPA500 on RTTY?  I gather
>> from the specs that perhaps it is 500 w as long as the duty cycle does not
>> exceed 10 minutes operate/ 5 minutes standby.  Is this correct?
>
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