Re: [Elecraft] [K3] Audio cutting out??

[James Sarte (K2QI)]

Can any contacts have gotten corroded internally and perhaps after the
unit warms up, a better contact is made due to thermal expansion?
Reason I ask, I noticed that the screws on my K3 have begun to rust
while sitting in storage.

73,
James K2QI

On Tue, Aug 9, 2011 at 9:16 PM, Eric Swartz - WA6HHQ, Elecraft
 wrote:
> Unlikely. If it is activated, you get a 'Hi RFI' message on the VFO B
> display.
>
> 73, Eric
>
> ---
> www.elecraft.com
>
>
> On 8/9/2011 6:15 PM, James Sarte (K2QI) wrote:
>>
>> Hi Eric,
>>
>> No, squelch is wide open.  It was cutting out on SSB, FM, AM, etc.
>> For what it's worth, it isn't doing it anymore!  Strange... I wonder
>> if lightning in the distance was causing the overload circuitry to
>> kick in.  Is it possible?
>>
>> 73 de James K2QI
>>
>> On Tue, Aug 9, 2011 at 9:12 PM, Eric Swartz - WA6HHQ, Elecraft
>>   wrote:
>>>
>>> Hi James,
>>>
>>> Could you have the squelch turned up?
>>>
>>> 73, Eric   WA6HHQ
>>>
>>> ---
>>> www.elecraft.com
>>>
>>> On 8/9/2011 5:56 PM, James Sarte (K2QI) wrote:
>>>>
>>>> Not quite sure what's going on here; have had the K3 in storage for
>>>> about 4 months. Finally unpacked it after our move to PA and set it
>>>> up, and now audio is cutting in and out; as if it would just mute for
>>>> a few seconds (sometimes 4-5 secs) then come back to a normal level.
>>>> I'm wondering if the RF overload protection is engaging as the weather
>>>> here has been quite stormy, and I suspect lightning interference.  How
>>>> can I confirm?  It's been a long time since I've been on the air with
>>>> the K3 that I've forgotten quite a bit.
>>>>
>>>> Any suggestions?
>>
>>
>



-- 
73 de James K2QI
President UNARC/4U1UN
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Re: [Elecraft] [K3] Audio cutting out??

[James Sarte (K2QI)]

Hi Eric,

No, squelch is wide open.  It was cutting out on SSB, FM, AM, etc.
For what it's worth, it isn't doing it anymore!  Strange... I wonder
if lightning in the distance was causing the overload circuitry to
kick in.  Is it possible?

73 de James K2QI

On Tue, Aug 9, 2011 at 9:12 PM, Eric Swartz - WA6HHQ, Elecraft
 wrote:
> Hi James,
>
> Could you have the squelch turned up?
>
> 73, Eric   WA6HHQ
>
> ---
> www.elecraft.com
>
> On 8/9/2011 5:56 PM, James Sarte (K2QI) wrote:
>>
>> Not quite sure what's going on here; have had the K3 in storage for
>> about 4 months. Finally unpacked it after our move to PA and set it
>> up, and now audio is cutting in and out; as if it would just mute for
>> a few seconds (sometimes 4-5 secs) then come back to a normal level.
>> I'm wondering if the RF overload protection is engaging as the weather
>> here has been quite stormy, and I suspect lightning interference.  How
>> can I confirm?  It's been a long time since I've been on the air with
>> the K3 that I've forgotten quite a bit.
>>
>> Any suggestions?
>



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[Elecraft] [K3] Audio cutting out??

[James Sarte (K2QI)]

Not quite sure what's going on here; have had the K3 in storage for
about 4 months. Finally unpacked it after our move to PA and set it
up, and now audio is cutting in and out; as if it would just mute for
a few seconds (sometimes 4-5 secs) then come back to a normal level.
I'm wondering if the RF overload protection is engaging as the weather
here has been quite stormy, and I suspect lightning interference.  How
can I confirm?  It's been a long time since I've been on the air with
the K3 that I've forgotten quite a bit.

Any suggestions?
-- 
73 de James K2QI
President UNARC/4U1UN
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Re: [Elecraft] K3EXREF and Trimble Thunderbolts

[James Sarte (K2QI)]

Brilliant - thanks to all for your replies.

I'll start looking for a used Thunderbolt to experiment with.  Sorry
if I missed this in an earlier exchange, but are there specific
Trimble model numbers known for recommended units?

Paul - I agree; can never hurt to have a disciplined reference source
for other projects.

Mni tnx es vy 73,
James K2QI

On Tue, Apr 5, 2011 at 3:40 PM, Paul Christensen  wrote:
> Jim,
>
> In case you missed earlier comments, don't worry about phase noise
> performance of the external reference if you'll only use it with the K3.
> But, in addition to the K3, a high performance, low phase noise external
> reference can be distributed around the shack or work bench for other
> purposes.  I use a second output from the Trimble to phase-lock an ADAT
> transceiver.
>
> Paul, W9AC
>
> - Original Message -
> From: "Paul Christensen" 
> To: 
> Sent: Tuesday, April 05, 2011 3:36 PM
> Subject: Re: [Elecraft] K3EXREF and Trimble Thunderbolts
>
>
>>> 1.  Any reference oscillator operating at 10 MHz would work with the
>>> K3XREF?
>>
>> The 10 MHz source should have a signal level between +4 dBm and +16 dBm.
>> For
>> square wave sources, 2VDC to 3.3VDC peak is optimum.  If the source is a
>> 5V
>> logic level, use a 50-ohm resistor in series with the input.
>>
>>> 2.  All that's needed for this to work is the K3XREF, updated
>> firmware, an accurate 10 MHz clock/oscillator, and a BNC cable?
>>
>> Yes.
>>
>>> 3.  Trimble Thunderbolt seems to be a good, cheap product to try.  Any
>> others that are > $100?
>>
>> Many.  For those not affraid of getting a soldering iron hot, I think the
>> Trimble units are pretty tough to beat.  Requires making a power cable to
>> a
>> triple-output power supply of your choice.  For a while, the HP Z3801A
>> units
>> were very popular.  These use noisy DC-DC internal converters, are power
>> hungry, but offer some of the best phase noise peformance of all the
>> GPS-DO
>> units.  The Trimble units have been documented to pretty much meet the
>> phase
>> noise performance of the Z3801A.   Rubidium is another choice in the USD
>> $100 range but these too will require some creative power connections.
>>
>>> What are the additional advantages of doing this other than knowing
>> you've pretty much eliminated any frequency drift?
>>
>> Really none I can think of, but as the weak-signal V/UHF ops have said,
>> that's reason enough!
>>
>> Paul, W9AC
>>
>>
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-- 
73 de James K2QI
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Re: [Elecraft] K3EXREF and Trimble Thunderbolts

[James Sarte (K2QI)]

Hello group,

It's been many months since I've posted here, much less actually done
something new with my K3.  This topic has however piqued my interest.
Just so I understand fully, am I right in assuming then that the
following is correct:

1.  Any reference oscillator operating at 10 MHz would work with the K3XREF?
2.  All that's needed for this to work is the K3XREF, updated
firmware, an accurate 10 MHz clock/oscillator, and a BNC cable?
3.  Trimble Thunderbolt seems to be a good, cheap product to try.  Any
others that are > $100?

What are the additional advantages of doing this other than knowing
you've pretty much eliminated any frequency drift?

73 de James K2QI
President UNARC/4U1UN

On Tue, Apr 5, 2011 at 2:32 PM, Rich Heineck  wrote:
> The K3EXREF uses the 10 MHz standard as it's time base to measure the K3's 
> TCXO and passes
> an error value to the K3's MCU every few seconds.  No TCXO frequency control 
> takes place,
> thus no increase in phase noise.  Frequency compensation is done in software 
> by
> automatically updating the REF CAL function.  A relatively simple mechanism 
> but effective :)
>
> For my installation, I'm using a Thunderbolt, an $11 active antenna from 
> Digi-Key, and a
> 30' run of RG-6, which works nicely with the F connector on the Tbolt.
>
> 73,
> Rich  AC7MA
>
> On 4/5/2011 10:35 AM, Leigh L. Klotz Jr WA5ZNU wrote:
>> ...
>> The K3XREF product that Elecraft is developing is, to my understanding, an
>> external disciplining interface for the TCXO in the K3. It's probably a
>> frequency counter / microprocessor which reads the internal oscillator and
>> the external 10 MHz reference, and when the internal oscillator doesn't
>> produce the right number of cycles in 10 million of the external
>> oscillator's cycles, it adjusts the voltage on the TCXO to bring it back
>> into spec.  But if you do this too often, you'll introduce phase noise into
>> the K3 (think of it as FM-ing).  Wayne N6KR has said it does this a few
>> times a second an has achieved a trade off between accuracy and phase noise.
>> (I presume he doesn't adjust during TX, for example.)
>>
>> I leave my K3 on most of the time, and I've found that it is seldom off more
>> than +/- 3 Hz.  But the K3XREF would let it off +/- 1Hz as soon as you turn
>> it on, provided it's hooked up to your external reference.  The actual
>> received frequency is only valid for one mode and one filter, once you
>> calibrate it, since when you shift modes or filters the offets of the
>> various internal IF stages varies.  (Keep that in mind if you use the K3 for
>> the ARRL FMT.)
>>
>> Leigh/WA5ZNU
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Re: [Elecraft] K3. 2.7 or 2.8 filter?

[James Sarte (K2QI)]

The 2.7 has been satisfactory for me.  I have matching pairs for the
sub, and both 2.7s work very well.

73,
James K2QI

On Sun, Dec 19, 2010 at 11:17 AM, Mike Rodgers
 wrote:
> I finally able to order myself a k3 on Monday. I will probally never get the 
> sub receiver. Will there be any noticeble advantage on ssb to get the
> 2.8 with 8 poles? I will be getting the
> 1.8 as well. Thanks and cc me as well if possible as I get the list as daily 
> digest.
>
> I saw it on the radio!
>
> Happy QSO'ing.      Mike R
>
>
>
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-- 
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Re: [Elecraft] Apple MacBook Pro Audio for PSK-31 with K2?

[James Sarte (K2QI)]

Alan, what MBP do you own?

I have a 2010 15" MBP, and it has separate stereo input and output
jacks.  I am able to input anything the K3 spits out with nothing more
than a regular stereo cable.

73,
James K2QI

On Thu, Dec 9, 2010 at 9:27 PM, Alan D. Wilcox
 wrote:
> Hello,
>
> The MacBook Pro has a single 1/8" audio connection for both mic in and
> external-speaker output. Unfortunately, that disables the internal speakers,
> preventing their use for monitoring. Also, the single "special" plug needs a
> homebrew Y-cable to get the input and output on separate connectors.
>
> Before I over-complicate what should be a simple interface to the K2, does
> anyone have a success story with the MacBook Pro?
>
> Cheers, Alan
>
> Alan D. Wilcox, W3DVX
> 570-321-1516
> http://WilcoxEngineering.com
> https://www.smashwords.com/books/view/28062
> Williamsport, PA 17701
>
>
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Re: [Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

Aha! Discovered that AFX was on.  Turned it off, and now everything
works perfectly.

73 and good night!
James K2QI

On Sat, Dec 4, 2010 at 1:28 AM, James Sarte (K2QI)  wrote:
> Only thing I have to figure out now is what to do about the audio
> being out of phase; there is a hollow, echo type sound that is
> produced now that both channels are being combined into a single
> channel.
>
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Re: [Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

Hi Don,

No such luck on finding schematics for the adapters, but I did test
everything out with my ohmmeter.  It looks like the adapters I
purchased do exactly what you suggest.  Ring and tip of the adapter is
connected to just tip on the other end of the mono cord, while sleeve
are shorted on both ends.

Seems to work well enough, and as I said in my previous emails, both
tip and ring present the K3 with a 22 ohm load when connected to the
ANEM.

Only thing I have to figure out now is what to do about the audio
being out of phase; there is a hollow, echo type sound that is
produced now that both channels are being combined into a single
channel.

73,
James K2QI

On Sat, Dec 4, 2010 at 1:10 AM, Don Wilhelm  wrote:
>  James,
>
> The only way to be certain is to examine the schematic of the adapter (I
> know, sometimes that is hard to come by), or to dope it out with your
> ohmmeter.  I have found some that do it either way.
>
> The one you want is one that connects the ring and tip of the stereo plug to
> the tip if the mono jack.  That one will connect both the left and right
> channels together and do what you desire.
>
> Sorry if the adapter nomenclature is confusing - in the midst of confusion
> and lack of information about how the various adapters are wired, it is
> usually easier to build your own adapter rather than relying on the "smarts"
> of someone else who assumes (but does not know) what you are trying to
> accomplish.
>
> 73,
> Don W3FPR
>
>
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Re: [Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

One last experiment showed that with a standard stereo 1/4" to 1/8"
reducer with a mono 1/8" device connected to the end, ring and sleeve
showed a 0 ohm load.

So it seems to me that the RS adapters that short ring and tip rather
than ring and sleeve should be OK for use with the K3.

Tnx,
James K2QI

On Fri, Dec 3, 2010 at 11:53 PM, James Sarte (K2QI)  wrote:
> BTW, one thing I noticed is that both stereo to mono adapters I
> purchased short ring and tip together rather than ring to sleeve.
> Since both hot signals are combined, isn't there still a load being
> presented to the right channel amp?
>
> I know some adapters will short ring to sleeve, thereby presenting a 0
> ohm load to the amp.  In this case, that isn't happening.
>
> My ohm meter shows when using a stereo to mono adapter while connected
> to the mono DSP, ring and sleeve show a 22 ohm load; tip and sleeve
> show a 22 ohm load, and ring and tip have a 1 ohm load as they're
> shorted.
>
> Seems safe to me?
>
> Tnx,
> James K2QI
>
>
>
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Re: [Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

BTW, one thing I noticed is that both stereo to mono adapters I
purchased short ring and tip together rather than ring to sleeve.
Since both hot signals are combined, isn't there still a load being
presented to the right channel amp?

I know some adapters will short ring to sleeve, thereby presenting a 0
ohm load to the amp.  In this case, that isn't happening.

My ohm meter shows when using a stereo to mono adapter while connected
to the mono DSP, ring and sleeve show a 22 ohm load; tip and sleeve
show a 22 ohm load, and ring and tip have a 1 ohm load as they're
shorted.

Seems safe to me?

Tnx,
James K2QI



On Fri, Dec 3, 2010 at 6:14 PM, Paul Christensen  wrote:
> Jim (K9YC) is right.  When looking at the K3 schematic, realize that the
> headphone amp's 8-ohm build-out resistors are not on the same schematic page
> as the headphone amp.  At least it wasn't the last time I looked.
>
> Paul, W9AC
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Re: [Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

I will have a look a the schematics tonight after dinner; just find it
a bit hard to believe that I'd get conflicting information direct from
Aptos.

Tnx,
James K2QI

On Fri, Dec 3, 2010 at 5:57 PM, Jim Brown  wrote:
>
> The manual is correct -- the HEADPHONE output is isolated with
> resistors. The SPEAKER output is NOT, and putting a two-circuit plug
> (mono plug) into it can cause the output chip to fail destructively.
>
> Again, the SCHEMATICS are on line. Study them.  We're hams. We passed
> exams showing that we know this stuff.
>
> 73, Jim K9YC
> __
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Re: [Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

OK, now I'm REALLY confused.

From what I've read on the reflector, and what others have told me, it
is OK to insert a mono plug into either the front or rear phone jacks.
 It was also made very clear that inserting a mono plug into the rear
SPKR jack was a big no-no, even if the settings were set to SPKRS=1.

Now, I just got an email from Dale Farmer who told me that I should
not insert a mono plug into the phone jacks, as the plug will
obviously short the amplifier channels.  On the other hand, and
contrary to what everyone else told me, he said it was OK to insert a
mono plug into the SPKR jack as long as speakers setting was 1.  His
reasoning was, that if speakers were set 1 in the menu, the right
channel amp would be isolated and thus no damage could happen.

But here's what confuses me. According to page 20 of the manual, it states:

> PHONES
>
> STEREO or MONO; 16
>
> The front and rear-panel headphone jacks are both
>isolated with series resistors. This allows you to use
>mono phones on one jack and stereo on the other, if
>required. You’ll need stereo phones for AFX (audio
>effects) and stereo dual receive (with sub receiver).
>Ω min. recommended

Now what am I to believe here???  If I understand what was written in
the manual, then it's ok to use a mono plug in those jacks as they're
buffered by a series of resistors.

73,
James K2QI
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Re: [Elecraft] [K3] Keypad beeps when phones plugged into rear phone jack?

[James Sarte (K2QI)]

Nevermind!  All is working.

On Fri, Dec 3, 2010 at 4:02 PM, James Sarte (K2QI) wrote:

> Is there any way to get the button confirm beeps to sound when using phones
> plugged into the rear phone jack?
>
> --
> 73 de James K2QI
> President UNARC/4U1UN
>
>


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[Elecraft] [K3] Keypad beeps when phones plugged into rear phone jack?

[James Sarte (K2QI)]

Is there any way to get the button confirm beeps to sound when using phones
plugged into the rear phone jack?

-- 
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President UNARC/4U1UN
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Re: [Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

Thanks Don.

I have decided to forego the the 1/4" to 1/8" adapter for the front phone
jack.  I am now plugging the 1/8" mono cable and plug directly into the rear
phone jack.  To get audio to both cans, I am using a mono to stereo adapter
between the offboard DSP and my headphones.  Seems to work fine, and can now
get sub rx audio to both cans as well after adjusting the L-MIX-R settings
to Ab - b.

In the end, I guess I overcomplicated matters.  I just wanted to ensure that
inserting a mono plug into either front or rear phone jacks would be fine.

Tnx,
James

On Fri, Dec 3, 2010 at 3:38 PM, Don Wilhelm  wrote:

>  James,
>
> That is incorrect.  If you plug a 3.5mm mono plug into the adapter, it will
> short between the ring and sleeve on the 1/4 inch side too.
>
> 73,
> Don W3FPR
>
>
>
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Re: [Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

I'm assuming however that a 2 circuit plug into a 3 circuit adapter should
be fine; i.e. plugging a 3.5mm mono plug into 1/4" stereo to 3.5mm stereo
adapter, which is then inserted into the 1/4" phone socket?

Tnx,
James K2QI

On Fri, Dec 3, 2010 at 2:14 PM, Jim Brown  wrote:

> On 12/3/2010 8:29 AM, James Sarte (K2QI) wrote:
> > Just wanted to get some advise before I continue with my experiment.
>
> Two-circuit 1/8-in plugs should NOT be used at the output of the K3. A
> 3-circuit plug is needed. Nearly all pre-made patch cables are junk, and
> many are wired wrong for our uses. We are hams. We can MAKE our own
> patch cables, and we can study the schematics to see how to wire them.
> Elecraft schematics are on line. Good quality 1/8-inch connectors are
> made by Neutrik and Switchcraft, and are available on line from good pro
> audio vendors like Full Compass Systems in WI.  I use miniature coax to
> build them (like RG174, etc.)
>
> For part numbers, see http://audiosystemsgroup.com/HamInterfacing.pdf
> There's a table on one of the slides.
>
> 73, Jim Brown K9YC
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Re: [Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

Thank you Joe.  That really puts my mind at ease.

Vy 73,
James K2QI

On Fri, Dec 3, 2010 at 12:49 PM, Joe Subich, W4TV  wrote:

>
>  With that said, is it safe to bridge the L&R channels coming out of
>>> the K3'sphone jacks, front or rear panel without fear of damaging
>>>
>>> the amplifier? The ANEM presents a 22 ohm load to the K3.
>>>
>>
> Yes, it is safe to sum the *headphone* jacks since both the front and
> rear panel headphone jacks include 8.4 Ohm resistors in series with
> each (tip and ring) output.
>
> *WARNING* do not sum the Speaker output or use a mono cable in the
> speaker jack as the speaker output does not include any resistor and
> shorting an output (or driving power into an unused output) can
> destroy the speaker amplifier.
>
> 73,
>
>   ... Joe, W4TV
>
>
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[Elecraft] [K3] Shorting K3 PHONE jack outputs (WAS OT: Stereo to mono adapters)

[James Sarte (K2QI)]

Hello group,

Just wanted to get some advise before I continue with my experiment.

I recently received a new BHI ANEM AF DSP module.  It is a mono-only device
and as such, is supplied with a mono 3.5mm patch cable.

Plugging that cable into the K3 only gives me audio to the left channel.
The right channel or ring, I assume is left floating.

This morning, I stopped by Radio Shack and purchased a stereo to mono
adapter that essentially shorts tip and ring thus channeling both L&R
sources into one.  With this adapter, I can hear both main and sub receivers
in my left ear.

I however would like to be able to hear the main RX in both ears, so I
purchased another adapter: mono plug to stereo jack.

Basically, the connections will be like this:

[K3]-->[stereo to mono adapter]--->[mono patch cable]--->[ANEM
DSP]>[mono to stereo adapter]>[Headphones]

With that said, is it safe to bridge the L&R channels coming out of the K3's
phone jacks, front or rear panel without fear of damaging the amplifier?
The ANEM presents a 22 ohm load to the K3.

Mni tnx,
James K2QI


On Fri, Dec 3, 2010 at 7:04 AM, Monty Shultes  wrote:

> James, such an adapter would short the stereo outputs together unless it
> were an active mixer.  I doubt that it exists.
> Monty K2DLJ
>
>
> > Does anyone know the part number of a Radio Shack or equivalent 3.5mm
> stereo
> > male to 3.5mm mono female adapter that will bridge both L & R channels
> into
> > a single mono source?
> >
> > --
> > 73 de James K2QI
> > President UNARC/4U1UN
> > __
>
>


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Re: [Elecraft] OT: Stereo to mono adapters

[James Sarte (K2QI)]

OK, I think I got it now...

Here's what I plan to do:

Stereo to mono adapter -> ANEM AF DSP --> mono to stereo adapter
---> headphones.

The stereo to mono adapter that I already have will combine audio from both
main and sub receivers into a single channel.  The mono to stereo adapter on
the other end of my headphones will then take that mono signal and output
into both cans for a simulated stereo experience.

73,
James K2QI

On Thu, Dec 2, 2010 at 10:02 PM, James Sarte (K2QI) wrote:

> Hi Ken,
>
> That is not my intent.  What I'm trying to do is combine both L&R audio
> channels from the K3's phone output into a mono signal.  That mono signal
> will then go into my BHI ANEM which only accepts a mono input.  The ANEM's
> output is also mono.  I then want to be able to connect my stereo headphones
> into the ANEM and still get audio out of the L&R cans rather than just one.
>
> I can't seem to determine exactly what adapter is required.  Is it a mono
> plug to stereo jack, or stereo jack to mono plug?
>
> I have one of these, which is a stereo plug to mono jack adapter, but mixes
> both L&R sources into a single channel:
> S2M-Adapter-250.gif<http://www.scansound.com/xcart/images/P/S2M-Adapter-250.gif>
>
> I'm assuming then that I'll need this, which is a mono plug to stereo jack:
> Mono-to-Stereo-Adapter-250.gif<http://www.scansound.com/xcart/images/P/Mono-to-Stereo-Adapter-250.gif>
>
> I also assume that it's safe to bridge both L&R channels from the front or
> rear phone (not SPKR) jacks?
>
> 73,
> James K2QI
>
>
>
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Re: [Elecraft] OT: Stereo to mono adapters

[James Sarte (K2QI)]

Hi Ken,

That is not my intent.  What I'm trying to do is combine both L&R audio
channels from the K3's phone output into a mono signal.  That mono signal
will then go into my BHI ANEM which only accepts a mono input.  The ANEM's
output is also mono.  I then want to be able to connect my stereo headphones
into the ANEM and still get audio out of the L&R cans rather than just one.

I can't seem to determine exactly what adapter is required.  Is it a mono
plug to stereo jack, or stereo jack to mono plug?

I have one of these, which is a stereo plug to mono jack adapter, but mixes
both L&R sources into a single channel:
S2M-Adapter-250.gif

I'm assuming then that I'll need this, which is a mono plug to stereo jack:
Mono-to-Stereo-Adapter-250.gif

I also assume that it's safe to bridge both L&R channels from the front or
rear phone (not SPKR) jacks?

73,
James K2QI



On Thu, Dec 2, 2010 at 9:52 PM, Ken - K0PP  wrote:

>   Hi James,
>
> If you're wanting this adapter to be used with the K3's
> speaker jack on the rear of the radio, DON'T do it. (;-)
>
> 73!
> Ken Kopp  - K0PP
> elecraftcov...@gmail.com
> http://tinyurl.com/7lm3m5
>




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[Elecraft] OT: Stereo to mono adapters

[James Sarte (K2QI)]

Does anyone know the part number of a Radio Shack or equivalent 3.5mm stereo
male to 3.5mm mono female adapter that will bridge both L & R channels into
a single mono source?

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Re: [Elecraft] Interesting Conversation about FT-5000 vs K3

[James Sarte (K2QI)]

Martin F. Jue... :)

James K2QI

On Wed, Dec 1, 2010 at 3:32 PM, K9ZTV  wrote:

> To name just a few more . . .
>
> Oscar Hammarlund (never spelt with an "e" although a lot hams try to)
>
> Gus Gonsett (two "ts" but the company only had one) . . .
>
> Herb Johnson (Swan Electronics, named after his father)
>
> Edgar F. Johnson (E.F. Johnson)
>
> William M. Nye (Nye-Viking)
>
> Leo Meyerson (World Radio Labs and "Galaxy" and "Globe")
>
> James Millen (National Radio Co. & James Millen Manufacturing Co.)
>
> William J. Halligan (Hallicrafters)
>
> Russ Planck & E.G. Shalkhauser (RME)
>
> The list goes on and on . . .
>
> 73,
>
> Kent  K9ZTV
>
>
>
>
>
> On 12/1/2010 12:22 PM, Terry Schieler wrote:
> > There are MANY examples of successful corporations that were
> > founded and run for years by an individual.
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Re: [Elecraft] K3 ssb sound

[James Sarte (K2QI)]

Hi Mike,

I've always gotten compliments on my K3's audio.  This is with the Elecraft
MH2 hand mic.  As others have said though, you will need to tweak the TX EQ
settings for best performance, or to whatever suits your taste.

73,
James K2QI

On Thu, Dec 2, 2010 at 11:30 AM, Mike Rodgers
wrote:

> I'm still hearing rumblings about how the k3 sounds on ssb. This concerns
> me. The k3 will be a huge investment for my income and I can't help but
> wonder if it will be the right one. I'm really not seriously considering
> anything else but I'm sure getting nervous about unloading the cash. I'm
> just a rag chewer so there's more to it than just making the contact. I have
> however listened to Hector's audio files and they all sound good.
>
> Happy QSO'ing.   Mike R
>
>
>
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Re: [Elecraft] YAESU KEY CLIX

[James Sarte (K2QI)]

In case anyone else was curious as I was about key clicks, here's a good
link with recordings that demonstrate how a badly designed or configured
transmitter would sound:

http://www.w8ji.com/keyclicks.htm

73,
James K2QI
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Re: [Elecraft] Noise Reduction

[James Sarte (K2QI)]

Hi Guy,

I'd have to agree with you there.  I think the algorithm used by the BHI
device sounds much better than the BRIL offering.

73,
James K2QI

On Tue, Nov 30, 2010 at 9:13 PM, Guy Olinger K2AV wrote:

> Well, I listened to the demo's and to MY ears, it seemed ineffective,
> removing the voice entirely at some points.  The "cleaned" output was
> harsh and very treble, and seemed little more than a high pass filter.
>  IMHO, this one is clearly inferior to the K3.  If it was one of the
> choices, it would be complained about a lot, though as completely
> subjective as people are on this topic, some would probably like it.
>
> 73, Guy.
>
> On Tue, Nov 30, 2010 at 2:59 PM, JAMES ROGERS  wrote:
> > Personally I am quite happy with the solutions offered with the K3. I
> > had no problem finding the "sweet spot" for my noise environment. But
> > for those that wish more, take a look at this site. For a licensing
> > fee you can have BRIL ...
> >
> > "BRIL is a new proprietary algorithm has been recently developed for
> > adaptively estimating and removing background noise from speech
> > signals. Unlike noise reduction and speech enhancement algorithms
> > currently available on the market, the new algorithm is capable of
> > cleaning noisy speech even in severe noisy environments without any
> > distortion to the speech signal. The algorithm has been successfully
> > used in many communication systems with high level of noise. BRIL is
> > suitable for many applications such as car kits, mobile telephony,
> > conferencing, speech recognition, Internet phones, etc."
> >
> > They offer a demo where it seems you can play with setting various
> > parameters.
> >
> > http://www.dspalgorithms.com/products/nr.html
> >
> >
> > JIM ROGERS
> > w4...@bellsouth.net
> > http://web.me.com/jimrogers_w4atk
> >
> >
> >
> >
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Re: [Elecraft] KDVR3

[James Sarte (K2QI)]

Hi Johnny,

I do confirm with K3 #2730 and FW 4.22 that DVR record time is limited to
~10 seconds.  I can't remember if the time constraint was larger in previous
FW versions.  Have you tried reverting to an older FW to see if the results
differ?

73,
James K2QI

On Tue, Nov 30, 2010 at 10:33 AM, Johnny Siu  wrote:

> Hello Group,
>
> In my previous K3#46, the KDVR3 could record a message in M1-M4 well longer
> than
> 10 seconds per message.  Is my memory correct?
>
> I recently got a KDVR3 again for my latest K3.  However, each message M1-M4
> is
> now restricted to 10 sec and not long enough to record 'cq cq cq vr2xmc
> vr2xmc
> vr2xmc calling and standing by'
>
> Is there anyway to get round the latest restrictions?
>
>  cheers,
>
>
> Johnny VR2XMC
>
>
>
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Re: [Elecraft] K3: noise reduction performance

[James Sarte (K2QI)]

Hi Lyle!

Indeed, this is a very subjective issue. One issue though that many will
probably agree with me on is the decrease in audio fidelity whenever NR is
engaged; i.e. volume of speech drops in relation to NR.  Would it be
possible to alter the algorithm to prevent this from happening?

It seems to me like the current NR algorithm reduces *everything* within the
passband, including spoken word.

73,
James K2QI

On Tue, Nov 30, 2010 at 10:43 AM, Lyle Johnson  wrote:

> Psycho-acoustics is fun!  Some people swear by the K3 NR, others swear
> at it :-)
>
> Making further changes to the K3 NR remains a possibility, but is not a
> particularly high priority at the moment.  Priorities can and do change...
>
> 73,
>
> Lyle KK7P
>
> > I hope Lyle will read this and perhaps be able to comment directly.
>
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Re: [Elecraft] K3: noise reduction performance

[James Sarte (K2QI)]

Hello Group,

I went ahead and ordered another BHI ANEM module, but I still have high
hopes that the K3's NR performance will improve.  I believe one of the
biggest issues is related to audio fidelity when the NR is activated.  I
find myself having to turn up the AF gain in order to compensate for the
drop in speech volume when NR is on.  Doing so however increases the volume
of band noise which sort of mitigates any benefits the NR brought with it.
Think of it sort of as a see-saw where one is always adjusting one variable
to compensate for another.

I hope Lyle will read this and perhaps be able to comment directly.

Mni tnx es vy 73,
James K2QI

On Sat, Nov 27, 2010 at 7:16 AM, James Sarte (K2QI) wrote:

> Hello Elecrafters,
>
> Regarding the issue of NR, I know this can be a touchy subject and most
> will say its very subjective.  This post isn't intended as a complaint or
> criticism.  Instead, I hope through constructive discussions, more
> improvements to the K3's NR performance will be realized. I'd like to begin
> by saying that Lyle and crew have a done a fantastic job to date with the
> K3's NR.  I've had the privilege of watching the K3's NR function improve
> over time.  The boys at Aptos should really be commended for listening to
> their customers.
>
> With that said, the recent CQSS has made me realize that there is still
> room for improvement.  During the SS, I used NR extensively in combination
> with RF gain and filter hi-cut/lo-cut/shift settings.  NR when used in
> combination with the aforementioned K3 adjustments can and does work well.
>  The problem that I believe remains however is the algorithm used still
> seems too broad in its rejection calculations; what I mean is that SSB
> settings (i.e. F5-1 and higher) don't seem to be selective enough to reduce
> noise while allowing speech patterns to remain unaffected.  In other words,
> the DSP sounds like its reducing everything within its passband.  To my
> ears, the NR doesn't seem to make speech "pop out" quite as effectively has
> other NR implementations.  This can be seen by a not-so-subtle reduction in
> speech volume whenever the NR is turned on.   The NR behavior is consistent
> regardless of AGC slope or threshold settings.
>
> Below are several links to audio recordings of a product I used to own.  It
> is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3.  I
> should have hung on to it as it has become my benchmark for NR performance.
>
> These are some sample recordings of the ANEM being turned on and off.
>  These recordings are found on W4RT's website
>
> 20 m SSB <http://www.w4rt.com/BHI/20Mband-ssb.wav>
> 80 m SSB <http://www.w4rt.com/BHI/80conv-ssb.wav>
> 80 m SSB <http://www.w4rt.com/BHI/80Mconv2-ssb.wav>
>
> I've also compared the K3's NR performance to that of the Icom 756 Pro 3
> which has similar NR reduction properties - albeit not as effective - as the
> ANEM.
>
> Perhaps I am being subjective or overly critical, but one thing you can
> easily notice with the ANEM recordings is that speech volume doesn't get as
> affected as the K3s.  This is really surprising to me as the NR for the ANEM
> is AF rather than IF like what's used in our radios.  This leads me to
> believe that the ANEM's NR algorithms are more effective in reducing
> background noise while leaving speech unaffected.
>
> What do you guys think?
>
> Sorry for the long email. Many thanks in advance for your
> ideas/suggestions.
> <http://www.w4rt.com/BHI/20Mband-ssb.wav>
> --
> 73 de James K2QI
> President UNARC/4U1UN
>
>
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Re: [Elecraft] [K3] Line out, speakers, and L-mix-R settings...

[James Sarte (K2QI)]

I have another question that's somewhat related to my original post.  I know
it has been discussed many times over; that one should avoid using a mono
plug in the SPKRS jack.

What I'd like to know though is this:  Would it be OK to use a mono plug in
either front panel PHONES output, or rear panel PHONE or LINE output without
fear of blowing something up?

Manual says it should be fine, but just want to get confirmation beforehand
that this is OK to do.

Tnx!

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[Elecraft] K3: noise reduction performance

[James Sarte (K2QI)]

Hello Elecrafters,

Regarding the issue of NR, I know this can be a touchy subject and most will
say its very subjective.  This post isn't intended as a complaint or
criticism.  Instead, I hope through constructive discussions, more
improvements to the K3's NR performance will be realized. I'd like to begin
by saying that Lyle and crew have a done a fantastic job to date with the
K3's NR.  I've had the privilege of watching the K3's NR function improve
over time.  The boys at Aptos should really be commended for listening to
their customers.

With that said, the recent CQSS has made me realize that there is still room
for improvement.  During the SS, I used NR extensively in combination with
RF gain and filter hi-cut/lo-cut/shift settings.  NR when used in
combination with the aforementioned K3 adjustments can and does work well.
 The problem that I believe remains however is the algorithm used still
seems too broad in its rejection calculations; what I mean is that SSB
settings (i.e. F5-1 and higher) don't seem to be selective enough to reduce
noise while allowing speech patterns to remain unaffected.  In other words,
the DSP sounds like its reducing everything within its passband.  To my
ears, the NR doesn't seem to make speech "pop out" quite as effectively has
other NR implementations.  This can be seen by a not-so-subtle reduction in
speech volume whenever the NR is turned on.   The NR behavior is consistent
regardless of AGC slope or threshold settings.

Below are several links to audio recordings of a product I used to own.  It
is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3.  I
should have hung on to it as it has become my benchmark for NR performance.

These are some sample recordings of the ANEM being turned on and off.  These
recordings are found on W4RT's website

20 m SSB 
80 m SSB 
80 m SSB 

I've also compared the K3's NR performance to that of the Icom 756 Pro 3
which has similar NR reduction properties - albeit not as effective - as the
ANEM.

Perhaps I am being subjective or overly critical, but one thing you can
easily notice with the ANEM recordings is that speech volume doesn't get as
affected as the K3s.  This is really surprising to me as the NR for the ANEM
is AF rather than IF like what's used in our radios.  This leads me to
believe that the ANEM's NR algorithms are more effective in reducing
background noise while leaving speech unaffected.

What do you guys think?

Sorry for the long email. Many thanks in advance for your ideas/suggestions.

-- 
73 de James K2QI
President UNARC/4U1UN
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Re: [Elecraft] [K3] Line out, speakers, and L-mix-R settings...

[James Sarte (K2QI)]

No suggestions?

Hope everyone had a good thanksgiving.  I know mine is about to start; my
11mo daughter just came home from pediatric ICU.  I am thankful for that.

73,
James K2QI

On Wed, Nov 24, 2010 at 10:19 PM, James Sarte (K2QI) wrote:

> Curious thing I noticed today; plugged in my headphones only to continue
> hearing monoraul audio coming out of my PC's speakers.  It took me a second
> to realize that audio from the K3 was being piped out of the LINE OUT jack
> in the rear, into my PC's input, and out to the two speakers I have sitting
> on my desk.
>
> At first I thought it was strange that the audio I was hearing was only
> coming out of the left speaker rather than both.  I checked the manual and
> after a few minutes of reading realized that under normal situations,
> activating the SUB would provide the right channel.  I then started playing
> around a bit more, and figured I'd post this question to the group just to
> make sure I understand how these functions work properly.
>
> My experimentation led me to the SPKRS settings which was currently set at
> 1.  With the SUB off, I changed the speaker setting to 2 but no change;
> audio was still being heard on the left speaker and not the right.  Am I
> then correct in my assumption that the speakers setting has no bearing on
> the actual number of channels being output from the LINE OUT jack?
>
> This brings me to my second question - is there a way to get both L and R
> channel audio output to the LINE OUT jack just from the main receiver
> without the SUB being activated?
>
> My last question, does the SPEAKERS setting only affect the SPKR OUT jack
> on the rear panel?  According to the manual, leaving it at 1 will only
> provide one channel of audio.  Would setting it to 2 provide both L&R
> channels to the speakers regardless of SUB activation?
>
> Mni tnx es happy thanksgiving.
> --
> 73 de James K2QI
> President UNARC/4U1UN
>
>


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Re: [Elecraft] Plasma TV Noise any ideas on how to filter it out.

[James Sarte (K2QI)]

Tis true they are RFI generators, but plasma black levels are still much
better than LCD, LCOS, or DLP sets.  Only thing that's better in that area
are tube televisions.

As a movie buff, I can't stand black crush, so I live with my Panasonic
plasma.  When I do QRV, the fix is simple; I turn the TV off.  That takes
care of most of my television-related noise.  I can't however do much about
the RFI given off by my neighbor's plasma sets, so I still have to find an
effective way of nulling out that interference.

73,
James K2QI

On Wed, Nov 24, 2010 at 9:27 PM, Jim Cox  wrote:

> I think it is time to dump the plasma tv.. They are nothing but RFI
> generators...  Certainly not compatible with Amateur Radio...
>
> Jim K4JAF
>
>
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[Elecraft] [K3] Line out, speakers, and L-mix-R settings...

[James Sarte (K2QI)]

Curious thing I noticed today; plugged in my headphones only to continue
hearing monoraul audio coming out of my PC's speakers.  It took me a second
to realize that audio from the K3 was being piped out of the LINE OUT jack
in the rear, into my PC's input, and out to the two speakers I have sitting
on my desk.

At first I thought it was strange that the audio I was hearing was only
coming out of the left speaker rather than both.  I checked the manual and
after a few minutes of reading realized that under normal situations,
activating the SUB would provide the right channel.  I then started playing
around a bit more, and figured I'd post this question to the group just to
make sure I understand how these functions work properly.

My experimentation led me to the SPKRS settings which was currently set at
1.  With the SUB off, I changed the speaker setting to 2 but no change;
audio was still being heard on the left speaker and not the right.  Am I
then correct in my assumption that the speakers setting has no bearing on
the actual number of channels being output from the LINE OUT jack?

This brings me to my second question - is there a way to get both L and R
channel audio output to the LINE OUT jack just from the main receiver
without the SUB being activated?

My last question, does the SPEAKERS setting only affect the SPKR OUT jack on
the rear panel?  According to the manual, leaving it at 1 will only provide
one channel of audio.  Would setting it to 2 provide both L&R channels to
the speakers regardless of SUB activation?

Mni tnx es happy thanksgiving.
-- 
73 de James K2QI
President UNARC/4U1UN
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Re: [Elecraft] K3: Right paddle key not working?

[James Sarte (K2QI)]

Hello group,

Just wanted to report back on this issue.  Dale sent me some replacement
chokes which arrived today.  Despite my lack of confidence (and shaky
hands), I was able to remove the old choke and wire jumper.  I then soldered
on the replacement RFC4 choke.  The solder points don't look too pretty, but
they're not cold and continuity tests now pass FB.  Plugged everything back
together, and my paddle now works as it was supposed too.

Thank you everyone for your help.

73,
James K2QI

On Sat, Nov 13, 2010 at 6:53 PM, James Sarte  wrote:

> What am I doing wrong? I hooked up an old iambic paddle to the K3 a few
> moments ago.  Left paddle works fine; gives me a string of dots.  Right
> paddle doesn't do anything.  I checked continuity on tip, ring, and ground
> and everything tests fine.  Is there something I'm not doing right with the
> K3??
>
> --
> 73 de James K2QI
> President UNARC/4U1UN
>
>
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Re: [Elecraft] Sqelch Settings No Effect and audio listening fatigue and noisy computers.

[James Sarte (K2QI)]

Hi Don,

On pg. 59 of the manual, it states:

"*This menu entry normally sets the main receiver squelch value (**0**-**29*
*). If VFO A is rotated fully clockwise, the parameter changes to **=SUB POT
**. Squelch for both main and sub receivers will then be controlled by the
SUB RF/SQL knob, and both main and sub RF gain will be controlled by the
MAIN RF/SQL knob.*
*
*

*Note: By default, squelch applies only to FM mode. Tapping [1]** **while in
this menu entry alternates between **SQL=ALL **(all-mode squelch) and **
SQL=FM**.*"


If you want to use squelch in all modes, you'll have to tap button [1] while
in the SQ MAIN config section.


73,

James K2QI

On Sun, Nov 21, 2010 at 2:12 PM,  wrote:

> I have enabled the ability to change the sqelch settings to try and
> reduce some of the background static.  However, no matter how I adjust
> it from 0 to 29 it has no effect on the audio.
>
> Is this normal or do I not understand the function in the K3.  In any
> other radio I have owned in the past this would lower the static
> threshold.
>
> To try and improve the audio I have gone to an external equalizer and I
> hope this will help with the hearing fatigue I get with this radio.  I
> am wondering if part of the problem is the Heil pro 2 that I purchased
> with the radio.
>
> I am slowly playing with filter settings, NR, NB ans so on and I can
> definatly pull out signals.  I have been listening all over the bands
> with the contest going on so I can tell the differences.
>
> As a final statement I also had to ditch the tower computer and go to a
> laptop as the computer was putting lots of noise in the system when I
> connected it to the K3 even with a good shielded USB to RS232 converter
> with 6 turns in a 31 mix bead.  I changed to the laptop and this noise
> is not there.
>
> Anyway I am making progress but I would like some ideas on the sqelch.
>
> One final question is there a good users guide that helps to explain all
> the different settings and how making changes affect either RX or TX and
> what are the interactions between these settings.
>
> Thanks in advance for all your help.
>
> KD8NNU
> Don
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President UNARC/4U1UN
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Re: [Elecraft] OT: Ham Radio Stores in Vermont

[James Sarte (K2QI)]

Oops... you're absolutely right.  Don't know what I was thinking. Sorry!

Don't know how I got DE and VT or even NH mixed up. My bad... :)

73,
Jim K2QI

On Sat, Nov 20, 2010 at 11:26 AM, Bob Garrett  wrote:

> HRO is in New Hampshire not Vermont.
>



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Re: [Elecraft] K3: USB port

[James Sarte (K2QI)]

Don, yes I do recall now that the drivers were for the Prolific chipset.
That cable never worked properly for me, and I ended up ditching it in favor
of a Keyspan which uses the FTDI chipset.

73,
Jim K2QI

On Fri, Nov 19, 2010 at 12:34 PM, Don Cunningham wrote:

> James,
> You may have gotten the older Prolific chipset KUSB.  The new ones are FTDI
> chipsets and have NO problems with those programs.
> 73,
> Don, WB5HAK
>



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Re: [Elecraft] K3: USB port

[James Sarte (K2QI)]

Hi Rick,

I would suggest the Keyspan USB to Serial adapter over the KUSB.  With the
KUSB, I always had problems with it when using programs like HRD or DM780.
I believe that was due to the drivers being used.  OTOH, the Keyspan unit
works very well and does not seem to add any additional noise into the
equation.  It also seems to be well shielded from stray RF.

73,
James K2QI

On Fri, Nov 19, 2010 at 11:26 AM, Rick Prather  wrote:

> Sorry James but sometimes sitting in pile up that is out of control brings
> out the worst in us!
>
> This is one of those threads that seems to surface every few weeks to all
> the same responses but your question about the status of current thinking on
> the subject is different I guess.
>
> Personally, I'm happy with the present set up, but will be happier when I
> find a quieter adaptor.  May break down and get the KUSB since that darn P3
> has shown me that the IOGear one I use it pretty darn noisy!
>
> Rick
> K6LE
>
>
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Re: [Elecraft] K3: USB port

[James Sarte (K2QI)]

Hi Mike,

I'm not really asking for anything, other than whether or not the USB option
was still in the works.  I was just curious. The K3 works fine as is with
its current KIO3 configuration.  I didn't realize, as someone else had
already pointed out to me off-list, that this topic is akin to beating a
dead horse.  I guess I must have missed those emails; sorry for bringing it
up.

73,
James K2QI

On Thu, Nov 18, 2010 at 7:50 PM, Mike  wrote:

> I'm not sure how you envision moving the audio to USB.
>
> I think putting the USB port in the K3 would open a Pandora's box re:
> drivers.
>
> If you're asking to just move the serial to USB adapter into the rig, there
> is NO gain.
>
> If you're asking to do away with serial port comms entirely and go to USB
> only,
> you're creating a huge hassle for the software authors, as well as opening
> a
> Pandora's box re: drivers for it.
>
> 73, Mike NF4L
>
> On 11/18/2010 7:31 PM, James Sarte (K2QI) wrote:
> > Hello group,
> >
> > I know Wayne has mentioned several times in the past that they had
> > considered all possibilities when it comes to PC interfaces for the K3,
> > including USB.  In fact, he says the following on 16 June, 2009:
> >
> > "The KIO3's digital I/O module could be replaced with one that has USB
> > rather than RS232 -- or better yet, both. We planned for this.
> >
> > The reason we went with RS232 initially is that many hams are still
> > using PCs that have only RS232 ports. Those who prefer to use USB can
> > use an inexpensive USB-to-RS232 adapter. There is no difference in I/O
> > performance between the two methods. "
> >
> > Just wanted to revisit this topic and find out if anyone has heard
> anything
> > more regarding a possible USB interface for the K3.  I know it's not for
> > everyone, but for myself and perhaps others out there, the ability to
> carry
> > all data, including audio on a single cable would be convenient.  Right
> now,
> > I'm using a Keyspan USB to RS232 adapter for data, along with two
> separate
> > stereo cables for audio.  I don't have any real complaints with that
> setup,
> > but could be problematic when transferring the rig around from computer
> to
> > computer.
> >
>
>
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[Elecraft] K3: USB port

[James Sarte (K2QI)]

Hello group,

I know Wayne has mentioned several times in the past that they had
considered all possibilities when it comes to PC interfaces for the K3,
including USB.  In fact, he says the following on 16 June, 2009:

"The KIO3's digital I/O module could be replaced with one that has USB
rather than RS232 -- or better yet, both. We planned for this.

The reason we went with RS232 initially is that many hams are still
using PCs that have only RS232 ports. Those who prefer to use USB can
use an inexpensive USB-to-RS232 adapter. There is no difference in I/O
performance between the two methods. "

Just wanted to revisit this topic and find out if anyone has heard anything
more regarding a possible USB interface for the K3.  I know it's not for
everyone, but for myself and perhaps others out there, the ability to carry
all data, including audio on a single cable would be convenient.  Right now,
I'm using a Keyspan USB to RS232 adapter for data, along with two separate
stereo cables for audio.  I don't have any real complaints with that setup,
but could be problematic when transferring the rig around from computer to
computer.

-- 
73 de James K2QI
President UNARC/4U1UN
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Re: [Elecraft] XG2 Calibration Question

[James Sarte (K2QI)]

I've only used the XG2 to calibrate the K3's S-meter.

No actual receiver improvements other than a slightly more accurate meter
reading.

73,
James K2QI

On Thu, Nov 18, 2010 at 1:37 PM, larmar  wrote:

>
> I was wondering how much of a difference calibrating the K3 using the XG2
> vs
> the default factory calibration would have on performance?  For those who
> have used the signal generator, did you see any noticable improvement in
> overall receiver performance?  Trying to decide whether the investment
> would
> be worth it.
>
> Thanks,
>
> Larry
> KE5MO
> K3/100 #4499
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/XG2-Calibration-Question-tp5752828p5752828.html
> Sent from the [K3] mailing list archive at Nabble.com.
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Re: [Elecraft] K3 voltage reading

[James Sarte (K2QI)]

I'd like to add that on 10m, it only drops to 13.0V. Amp draw is around
15.5A.

James K2QI

On Wed, Nov 17, 2010 at 10:18 AM, James Sarte (K2QI) wrote:

> OK, well mine drops from 13.6V to 12.8V on 40m.  Amp draw is roughly around
> 17.88A
>
> On 20m, it drops to 12.7V
>
> HTH
>
> James K2QI
>
>   On Wed, Nov 17, 2010 at 10:15 AM, Steve Ellington 
> wrote:
>
>>  Mine reads 13.1v on any band so it doesn't seem to matter.
>> Steve N4LQ
>>
>> - Original Message -
>> *From:* James Sarte (K2QI) 
>> *To:* Steve Ellington 
>> *Cc:* Elecraft@mailman.qth.net
>> *Sent:* Wednesday, November 17, 2010 10:08 AM
>> *Subject:* Re: [Elecraft] K3 voltage reading
>>
>> What band/frequency?  I want to replicate your exact test variables and
>> revert with my results.
>>
>> James K2QI
>>
>> On Wed, Nov 17, 2010 at 10:02 AM, Steve Ellington 
>> wrote:
>>
>>> Can someone take a look at their voltage reading on their K3's DISP-V
>>> window and tell me what they get with key down, full power output into 50
>>> ohms?
>>> My PS shows 13.7v at it's terminals and the K3's display indicates 13.1v.
>>> I'm just wondering if there is excessive voltage drop on the power leads.
>>> I'm using the factory cable. I'm not sure if the K3 is indicating the
>>> voltage at rig's connector or the voltage on the final amp. transistors.
>>>
>>> Steve N4LQ
>>> __
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>>>
>>
>>
>>
>> --
>> 73 de James K2QI
>> President UNARC/4U1UN
>>
>>
>
>
> --
> 73 de James K2QI
> President UNARC/4U1UN
>
>


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Re: [Elecraft] K3 voltage reading

[James Sarte (K2QI)]

OK, well mine drops from 13.6V to 12.8V on 40m.  Amp draw is roughly around
17.88A

On 20m, it drops to 12.7V

HTH

James K2QI

On Wed, Nov 17, 2010 at 10:15 AM, Steve Ellington wrote:

>  Mine reads 13.1v on any band so it doesn't seem to matter.
> Steve N4LQ
>
> - Original Message -
> *From:* James Sarte (K2QI) 
> *To:* Steve Ellington 
> *Cc:* Elecraft@mailman.qth.net
> *Sent:* Wednesday, November 17, 2010 10:08 AM
> *Subject:* Re: [Elecraft] K3 voltage reading
>
> What band/frequency?  I want to replicate your exact test variables and
> revert with my results.
>
> James K2QI
>
> On Wed, Nov 17, 2010 at 10:02 AM, Steve Ellington wrote:
>
>> Can someone take a look at their voltage reading on their K3's DISP-V
>> window and tell me what they get with key down, full power output into 50
>> ohms?
>> My PS shows 13.7v at it's terminals and the K3's display indicates 13.1v.
>> I'm just wondering if there is excessive voltage drop on the power leads.
>> I'm using the factory cable. I'm not sure if the K3 is indicating the
>> voltage at rig's connector or the voltage on the final amp. transistors.
>>
>> Steve N4LQ
>> __
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>
>
>
> --
> 73 de James K2QI
> President UNARC/4U1UN
>
>


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Re: [Elecraft] K3 voltage reading

[James Sarte (K2QI)]

What band/frequency?  I want to replicate your exact test variables and
revert with my results.

James K2QI

On Wed, Nov 17, 2010 at 10:02 AM, Steve Ellington wrote:

> Can someone take a look at their voltage reading on their K3's DISP-V
> window and tell me what they get with key down, full power output into 50
> ohms?
> My PS shows 13.7v at it's terminals and the K3's display indicates 13.1v.
> I'm just wondering if there is excessive voltage drop on the power leads.
> I'm using the factory cable. I'm not sure if the K3 is indicating the
> voltage at rig's connector or the voltage on the final amp. transistors.
>
> Steve N4LQ
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Re: [Elecraft] OT: SPE expert 1k-fa

[James Sarte (K2QI)]

Hi Johnny,

There are a few members of the Eleflector that own the SPE.  From what I've
read, they've all had nothing but good things to say about the amplifier.
The SPE, if memory serves me right interfaces well with the K3 and can read
band data, etc.

With that said, do you know if the SPE 2K is available in your area? If so,
how much more expensive is it over its smaller sibling?

73,
James K2QI

On Wed, Nov 17, 2010 at 9:58 AM, Johnny Siu  wrote:

> Hello Group,
>
> While KPA500+KAT500 are in the production plan, do any of you use SPE
> expert
> 1k-fa with your K3?  How is the integration?  Is it silk smooth?
>
> I am thinking whether I should get the SPE or wait for the KPA500+KAT500
> which
> have been talking about for some years.
>
> Price of SPE here is US$3,800 so I am also thinking of the price
> differential
> with KPA500+KAT500.
>  cheers,
>
>
> Johnny VR2XMC
>
>
>
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Re: [Elecraft] K3 Firmware Issue

[James Sarte (K2QI)]

Turn K3 off, and close the K3 Utility.  Restart K3 then the utility and try
again.

73,
James K2QI

On Tue, Nov 16, 2010 at 10:14 PM, Glenn Haffly  wrote:

> Good evening , While trying to load 4.22 I had a momentary loss of AC power
> as new firmware was being loaded. Currently the front panel shows MCU LD
> and
> the red TX LED is flashing. The K3 utility is attempting to communicate but
> , The only thing happening is a scroll of the various bps connection
> speeds.
> The box to send checked items and send all new firmware to K3 are both
> grayed out.  I unplugged the K3 for a minute , applied power and held the
> power switch in for 10 seconds with no change.
>
> I would appreciate help getting firmware reloaded.
>
> Thanks , Glenn
> K5ZE
>
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Re: [Elecraft] OT: QST's review of the Yaesu FTDX5000MP

[James Sarte (K2QI)]

Regarding the IC-7700, which is a lot more expensive than the 7600, here's
what an Icom fan had to say about the missing 2nd receiver. Pay close
attention to the first bullet point.


Single HF receiver  with I/Q
second mixer, offering +40dBm 3rd-order intercept point*.

   - *The single receiver should be seen not as a disadvantage, but as a
   plus.* The single receiver allows no-compromise RX performance at a
   reasonable price; BNC sockets on the rear panel, and CI-V, allow easy
   connection and synchronization of a second Icom transceiver such as the
   756Pro3 as a secondary receiver. Many prospective IC-7700 buyers already own
   an IC-756Pro3. Add  the
   IC-7700 to your existing Pro3 for the perfect contest station; use the
   IC-7700 as your main transceiver, and the IC-756Pro3 as a spotting receiver.

   - Upgrade from your IC-765 or IC-775DSP, and get the benefits of a
   spectrum scope.

I love this guy's logic. :)

73,
James K2QI

On Tue, Nov 16, 2010 at 7:50 PM, Igor Kosvin  wrote:

> I don't recall, does the IC7600 has independent second receiver? Perhaps
> you can ADD second receiver to it? Can you ADD 500 Hz or 250 Hz roofing
> filter to it? No? Too bad, I will pass. Still not enough bang for the buck.
>
> 73, Igor, N1YX
>
>
>
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[Elecraft] K3: NB/NR and AM SWL?

[James Sarte (K2QI)]

Hello group,

What are the optimal NB/NR settings for use with AM and AM-S?  I'm
interested in using those features for those times when I SWL, but can't
seem to find a setting that doesn't overly alter audio quality.  The NR for
example seems to reduce the dynamic range, making audio sound very quiet and
muffled.  The NB on the other hand starts to distort the audio past anything
but the lowest settings.  Any suggestions?

Mni tnx!
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Re: [Elecraft] K3: Are the birdies really birdies

[James Sarte (K2QI)]

Hi Mike,

They're not birdies, but real signals.  See what happens when you disconnect
your antenna.  If they were birdies, therefore originating from within the
radio, you'll still hear them.

I have two routers in my house, and both wreak havoc for me!  I still
haven't found a good way to minimize their impact.

73,
James K2QI

On Tue, Nov 16, 2010 at 6:02 PM, Mike K2MK  wrote:

>
> There's a very interesting item in December's QST "The Doctor is In"
> feature
> (page 48 right column). Receiver birdies turned out to be caused by a noisy
> router. I have learned to live with 10 meter birdies on my K3. But lately
> I've been active on 12 meters and there is an S5 birdie at about 24900KHz.
> So after reading the article I started unplugging cables on my wireless
> router (which is in another room from my K3). Whoa, what's this? Birdies
> come and go as I unplug the router power line or unplug the CAT 5 cable
> going to the shack. Ditto in the shack. If I unplug the CAT 5 from the wall
> or from the PC the birdie on 12 meters disappeared. Moving on to 10 meters
> I
> discovered that all of the prominent birdies also disappeared. I haven't
> done a thorough investigation but I suspect they might all be gone.
>
> Of course that was only step one. I still need an internet connection on my
> shack PC so I'm currently experimenting. Snap-on ferrite cores had no
> effect. Moving the shack CAT 5 cable away from other radio related cables
> is
> having a positive effect. Next I'm going to try a shielded CAT 5 cable from
> the wall to the shack PC. But of course the cable wiring in the wall to the
> router is not shielded so I don't have high hopes of solving it in this
> way.
> But at least I'm on the right track and I'm sure I'll find something that
> works eventually.
>
> 73,
> Mike K2MK
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/K3-Are-the-birdies-really-birdies-tp5745866p5745866.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] OT: QST's review of the Yaesu FTDX5000MP

[James Sarte (K2QI)]

I believe some of the older Kenwood's also had a low MHz IF out - 8.8 or 8.9
MHz.

I know this because I have a Kenwood SM-230 that requires an 8.9 MHz IF
input.

James K2QI

On Tue, Nov 16, 2010 at 5:25 PM, Wes Stewart  wrote:

> There is a serious misconception by some true believers that Elecraft
> "invented" down-conversion (or at least conversion) to an i-f in the 8 to 9
> MHz range.
>
> Nothing could be further from the truth, and I know that the folks at
> Elecraft would never claim as much.  I had a Henry Radio Tempo-1 (Yaesu
> FT-200) back when radios warmed up the shack.  It was a 9 MHz i-f
> transceiver.
>
> Wes Stewart,  N7WS
>
> --- On Tue, 11/16/10, Benny Aumala  wrote:
>
> >
> > When K3 came I told this RX architecture will soon be a
> > standard
> > (as Rob Sherwood told long time ago).
>
>
>
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Re: [Elecraft] OT: QST's review of the Yaesu FTDX5000MP

[James Sarte (K2QI)]

Hi Benny,

Only new Icom expected is the IC-9100 Daylight to DC box.  Looks
interesting, and would most likely be compared to the Kenwood TS-2000.

The receiver is a double conversion superheterodyne. They claim +30 dBm
IP3.  How they tested that, I don't know.  Their promotional material also
states that the first receiver has a 15 KHz filter for the first IF, and 3/6
KHz filters are optional.  Not sure about the second receiver.

Price is another issue.  If you look at Icom's market pricing strategy, then
expect this rig to be somewhere in the neighborhood of $4,000 without the
1.2GHz module or additional filters.  Maybe, and this is just my estimate,
that fully loaded will probably be somewhere around $4500.

I'm waiting to see what reviewers have to say before jumping to
conclusions.  One thing that I can say right off the bat, is that I wish it
had the screen from the 7600 or 7700.  Right now, it looks like they took
the LCD panel straight off an Icom 746.

73,
James K2QI

On Tue, Nov 16, 2010 at 1:53 PM, Benny Aumala wrote:

> To-day we have K3 and welcome Kenwood back again with TS590.
> There is TT 599 Eagle and now this FT5K. Fine rigs all, and available.
> Waiting for Icom.
>
> Benny   OH9NB
>
>
73 de James K2QI
President UNARC/4U1UN
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Re: [Elecraft] K2 5995 Lives

[James Sarte (K2QI)]

Congratulations Michael on completion of K2 #5995!

Hope to work you on the bands soon! :)

Vy 73,
James K2QI

On Tue, Nov 16, 2010 at 1:26 PM, Michael Babineau wrote:

> I just made the first QSO with my newly completed K2 (serial #5995 - great
> number ! ) on 40m with VE9WJ.
>
> I used the Rework Eliminators UN-PCB kit to build an option-ready K2.
>  Many thanks to Mychael (aka "the Toroid-Guy") AA3WF for the excellent job
> on the pre-wound toroids.
>
> Michael VE3WMB / VA2NB
>
> P.S. Looking forward to exercising the new K2 in CQ WW CW in a couple of
> weeks.
>
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Re: [Elecraft] OT: Problems with Icom 756 Pro III internal tuner

[James Sarte (K2QI)]

Hello group!

I'd like to close this thread now; many thanks to everyone who replied
off-list with suggestions and assistance.  In summary, I was referred to an
Icom technician who I was able to speak too over the phone and describe the
situation.

The tech told me that he sees this behavior on many Pro II's and Pro III's.
He also stated that a 10% insertion loss seems to be the norm with these
radios, although he didn't have any documentation officially stating so.
Finally, he confirmed that the Icom uses a T network for its ATU versus the
modified Pi/L C-in/C-out network the K3 uses.  That obviously explains the
huge difference in efficiency.

With that said, I'll leave well enough alone.  He believes from my
description that the Pro 3 is working within manufacturer permitted
tolerances.

This experience also reconfirmed my belief that our K3's are superbly
engineered products, and I'm glad to be a part of this family.

Mni tnx,
James K2QI

On Mon, Nov 15, 2010 at 10:18 PM, James Sarte  wrote:

> Greetings fellow Elecrafters,
>
> I'm sorry for emailing this question to the group, but the folks on this
> reflector are a smart bunch.  Maybe someone could give me some advice or
> suggestions.  I posted this question to the Icom 756 Pro III group and QRZ,
> but no one seems to have an answer.
>
> I'm diagnosing a problem with an Icom 756 Pro III.  It's tuner's "insertion
> loss" is quite high.  For example, when the tuner is off, sending an
> unmodulated FSK carrier shows the transceiver putting out 100W.  As soon as
> the tuner is activated, power drops by 10-15%.  That's a lot of power being
> dissipated somewhere, and I don't think it's good especially for 100% duty
> cycle modes.  It doesn't matter whether the Icom is connected to a dummy
> load or resonant antenna.  The results are always the same on every band.
>
> In comparison, the K3's tuner seems to be incredibly efficient.  If there
> is a loss of output power on the K3 whenever its tuner is inline, it's not
> noticeable.  More often than not, power increases when the K3 finds a good
> impedence match.
>
> I've gone as far as recalibrating the Icom's tuner.  This was done by
> terminating the remote jack on the rear panel, and entering the tuner
> service mode.  The tuner calibration process completed with no errors
> reported by the Pro3.
>
> Any suggestions?  I'm going to call Icom support tomorrow to see what they
> say.
>
> -
> 73 de James K2QI
> President UNARC/4U1UN
>
>
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Re: [Elecraft] Firmware failed to load, again

[James Sarte (K2QI)]

Dr Martin,

I have not had this experience with any of the firmware versions; I have
been switching between many different releases as of late to help with some
beta testing.

I do not have the LPF installed yet.  I will be receiving one soon though.
I find it hard to believe that the LPF could have something to do with this
issue though; others would have mentioned it on the reflector.

Have you sent a message to K3 support?

73,
James K2QI

On Tue, Nov 16, 2010 at 4:54 AM, DM4iM  wrote:

> Elecrafters,
> when updating to 4.22 , DSP1 again failed to load.
> DSP1 is skipped, the Utility proceeds with DSP2.
>
> I need to start a second run with only DSP1 checked
> to complete the update.
> This happened with 4.17, 4.18 and 4.22.
>
> Otherwise the radio works 'as advertised'
>
> I installed the K3DSPLPF recently.
>
> Anyone experience this?
>
> Radio is K3 # 2878
> SUB RX
>
> Utility is the latest Linux version.
> Real serial connection (ttyS0), no USB.
>
> --
>
> 73,
> Martin DM4iM
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