Thanks Don.
Will run through the suggestions.
I'll take a peek at the filters through a VNA too.
Is there an 'ideal' freq vs transmission plot anywhere?
Two other suggestions off list for the 'deafness' points at the RX RP resistor
banks so I expect a dry joint might explain some of this.
72
Well go ahead and put me down for having the UTEC fans in SN#1116.
I'd say that the fans are perfectly reasonable yet they are clearly
audible when they are running. When they step up into high gear they
are very clearly heard and this is in a room full of computers with
several fans in each one.
Joe Planisky wrote:
> From the responses I received, it looks like the Elina fans were used
> on earlier K3s with serial numbers < 900 or so.
>
> I received responses from 13 people (including myself), covering 13
> K3s. If the reporter used words or phrases like "quiet", "silent",
> "nev
Don,
Thanks.
Premix LO signals look fine for both 40m and 20m bit more than 200mV P-t-P
http://m1kta-qrp.blogspot.com/2010/05/k1-build_28.html has the oscilloscope
plots and a spectrum plot from both too.
Using the oscilloscope to adjust the filters nice suggestion thanks.
Video, bit shaky on
If a KSYN3 was completely unmodified, the mods should be done as follows:
1. SMD version (only) of KSYN3 ALC.
2. K3SYN DDS Gain (your #3 below).
3. KSYN3 Stiffener (your #2 below).
This way there's no rework. Also remember that the DDS Gain mod is not
necessary for the Sub RX KSYN3 (if you d
David Pratt escribió:
> In a recent message, Ramiro Aceves said
>> I experienced something that I do not know wether is normal or not.
>>
>> 14 MHz band: Power knob 0,1,2,3,4,5,6,7,8,9,10,11,12---> jump to --->>>
>> 13, 14, 15 . and so on Watts.
>> 50 MHz band: Power know 0,1,2,3,4,5,6,7,
Alexandr Kobranov escribió:
> There is maybe some IMD issue on 50MHz in 9 - 12Watts range so
> mentioned levels skipped intentionally.
> Try to go through archives...
>
> 73!
> Lexa, ok1dst
>
Thank you very much Lexa
73, Ramiro, EA4NZ
David Quental escribió:
> Hello all,
>
> my K3 behaves same way like yours.
>
> Best 73.
>
> CT1DRB
> David Quental
>
Thanks David
73, Ramiro.EA4NZ
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Alexandr Kobranov escribió:
> Hi.
> there is info from May 04, 2008
>
>
> We only allow up to 8 W with the lower-power amplifier stage on 6
> meters to ensure plenty of headroom (i.e., low IMD). In an future
> firmware release we'll allow the high-power amplifier to cover
I know there has been a recent thread about headphones,
but this time I would like to focus on just the receive aspect,
as I need to buy a set of 'cans' for use 90% use with cw.
What I am really confused by is the K3's stereo rx capabilities,
with *ONLY* the main receiver.
(Looks like the headpho
Sam,
With the K3's excellent receive EQ capability, you can tailor the receive
sound most anyway you want, with most any headphones you want.
The Yamaha CM500's are very popular and cost a ton less than Heil. I have
both the Yamaha and Heil and switch back and forth - they both have their
plusses
Yes, just like the Proset Plus. But I prefer the latter as they seem more
sensitive.
73
Geoff
G3UCK
- Original Message -
From: "Sam Morgan"
> Does the Heil Proset allow for the stereo (separate channels)?
> It doesn't specifically say so.
___
Sam,
I am not certain why you looking only at Heil. Their products are
somewhat overpriced IMHO.
I suggest you go to a place that deals in consumer audio - Best Buy,
Circuit City, or even Target stores (Sam Ashe too) and look at what they
have. The popularity of iPods and other such devices h
Sam,
While popular, the amateur grade headsets are very poor
quality and a poor value compared to good stereo headsets.
I found two very good headsets for mine. One type is a noise
cancelling Phillips headset I bought at a local Ace hardware
for $20, and the very best I have ever had are Sennh
On 5/28/2010 7:44 AM, Don Wilhelm wrote:
> Sam,
>
> I am not certain why you looking only at Heil. Their products are
> somewhat overpriced IMHO.
>
I focused on Heil, just because the are usually spoke of as the golden standard
but folks that can afford to buy whatever they want, so I figured I s
I have been using the CM-500 since Nov 2009 and on CW and SSB,now that we can
have separate RX EQ per mode,its all you will need,set them up properly by your
wish and pay only about $52 for them,like Bob said,its the best bang for the
buck without a doubt.
AD4C
"If you see a woman handling a
Hi Sam,
Good questions for sure.
As I also agree IMHO the Heil stuff is over rated, for full bore 48 hour
contests I use Bose QC-2 headphones.
http://bit.ly/9bXxL4
I find these to be extremely comfortable especially over 36+ hours of wear time
non-stop. They can also be had cheap on the used
Does anyone have a wiring diagram for the 15 pin cable that will go from the K3
to the THP 2.5 linear?? or is it straight thru??
Thanks,
PHIL. www.n2bee.net
"Sometimes I think I understand everything, then I regain consciousness"
__
Elec
Sam,
When this topic was previously discussed I saw mention of Extreme
Isolation EX 29 headphones which provide:
1) Good noise suppression (29 dB or nearly a factor of 1000 at 1000 Hz) so
you can keep the volume down and not hear your station's fans or the TV in
the next room.
2) Comfort and
The THP2.5 uses a regular 15-pin D-connector, whereas the K3 uses the 15-pin
HD D-connector. Nothing special needs to be done, other than finding the
pin outs from the manuals. The THP 2.5 even has pull-up resistors so early
K3 radios will drive the band data input just fine (NOT the case with
This thread reminded me of something that I read back in I believe the
'80s. There was a circuit in which the CW audio was spread spatially,
i.e., the lower frequencies were heard toward your left side while the
higher frequencies were heard toward the right. The idea was that the
brain could d
I use similar arrangement. I follow K3 recommendation of no ALC which is
contrary to advice I received from THP. When using THP parameters I had
problems. Been ALC free 1yr plus.
Howard..K2HK
> From: dpsa...@tx.rr.com
> To: elecraft@mailman.qth.net
> Date: Fri, 28 May 2010 10:55:54 -0500
Contact either of the US Distributors for the Tokyo High Power
amplifiers for that data. They are HRO and Array Solutions.
Information is in the HL-2.5Kfx manual (use the "Yaesu" data).
Good luck.
73,
... Joe, W4TV
On 5/28/2010 11:30 AM, PHIL wrote:
> Does anyone have a wiring diagram fo
I've had Sennheiser HD400 for many years (long since out of production
but there is a newer model). These are very light. I've also the Heil
Proset noise cancellers. The Proset and any other can-style headphone
I've ever used just kill my ears after a while, like in a contest. The
HD400's are b
Since I work in pro audio, I have a selection of very good headphones laying
around. So far, everything Ive tried works with the K3. It all comes down to
creature comforts and, to some extent, their ability to reduce room noise.
The pro-quality in-ear earphones made by Etymotic Research and Shu
I had exactly the same experience as Bill (and I'm an ex-Orion user as
well.) While Eric is correct that, in theory, roofing filters with tights
skirts aren't necessary in a down-conversion design, the K3's hardware AGC
threshold requires tighter roofing filters when the band is crowded with
loud s
Keep in mind that Eric (K3NA) typically operates with AGC off, especially in
the presence of strong signals.
Ed - W0YK
Ed Muns
Muns Vineyard - www.munsvineyard.com
Facebook - www.facebook.com/munsvineyard
Dick, WC1M, wrote:
>
> I had exactly the same exp
Does anyone know if the W1 wattmeter LED lightbar readouts can be physically
and electrically remoted from the rest of the circuit board, e.g. say, cut the
board and use wire flat ribbon? Anyone tried this? Doing so would make
mounting the board in an enclosure so much easier. Jim Robbins, N1
Ed Muns, W0YK wrote:
>
> Keep in mind that Eric (K3NA) typically operates with AGC off, especially
> in
> the presence of strong signals.
>
True but "AGC Off" only applies to the digital (DSP) AGC. Hardware AGC is
always on (to protect the DSP) and therefore is subject to blocking, even if
AG
Jim,
Yes, I did it some time ago.
You can see pictures of what I did on my web site www.lawrenceingram.com
Let me know if you have any questions
73,
Larry Ingram AG4NN
At 02:08 PM 5/28/2010, you wrote:
>elecraft@mailman.qth.net
Does anyone know if the W1 wattmeter LED lightbar readouts can be
> Ed Muns, W0YK wrote:
> >
> > Keep in mind that Eric (K3NA) typically operates with AGC off,
> > especially in the presence of strong signals.
> >
Bill Tippett, W4ZV, replied:
>
> True but "AGC Off" only applies to the digital (DSP) AGC.
> Hardware AGC is always on (to protect the DSP) and
Has anyone used a second K3 for a diversity receiver rather than a
second receiver in a single K3? The switching and protection could be
worked out.
Mike KL7QOW
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Michael Dillon wrote:
> Has anyone used a second K3 for a diversity receiver rather than a
> second receiver in a single K3? The switching and protection could be
> worked out.
It would present some significant challenges.
1) The Ref Osc from the "primary" K3 would have to be used for all
sign
Sam Morgan-3 wrote:
>
> Besides sealing out noise passively
>
For those interested in external isolation, I found a really neat website
which compares noise isolation by frequency range. Select among 4
headphones you're interested in, choose Isolation Response and then click
Compare for a gra
Has anyone used a second K3 as a diversity receiver as opposed to the
second receiver installed in a single K3? Switching and protection
could be accomplished externally to achieve this.
Mike KL7QOW
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You may need to cut and past the entire link into your browser to make it
work correctly!
http://www.headphone.com/learning-center/build-a-graph.php?graphID[0]=1743&graphID[1]=533&graphID[2]=753&graphID[3]=1753&graphType=6&buttonSelection=Compare+Headphones
--
View this message in context:
http
You have to have the same time base for both channels.
Ideally it would be the same LO for both channelsbut
separate oscillators from the same reference are workable.
Two different radios would be a problem to keep locked.
- Original Message -
From: "Michael Dillon"
To:
Sent: Fr
I think you are referring to March 1999 QST, "Binaural IQ".
That effect is what the K3 AFX Bin mode is supposed to be, insn't it?
(For some reason though my ears can't hear the "spatial" separatoin.
It sounds different for sure, but I just don't interpret it as spatial
separation..)
73,
Drew
AF2
What!!? You mean your jaw didn't drop and eyes glaze over as did the
author's?
Steve
N4LQ
- Original Message -
From: "drewko"
To: "Jim Campbell"
Cc:
Sent: Friday, May 28, 2010 4:09 PM
Subject: Re: [Elecraft] K3 Was - Which headphones for stereo cw work? Now -
Audio Spread Spectrum
OK - Here is my problem, I should have worded it different. I bought an "open
box" Linear and it came without any cables. So I guess I need to know what
pins go to what pins.I can get the connectors and build my own cable if I
know what hooks where...I replaced the board in my K3 so I didn
ever notice this?
Clint KI6SSN
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The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
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Elecraft mai
No, but the jaw drop did occur when I was a kid with my first pair of
stereo headphones listening to the Rolling Stones psychedelic album
(forget what it was called...) I guess I was expecting something like
that from binaural IQ...
The funny thing with the K3 AFX is I can't decide if it sounds be
Hi All,
I have a a Tokyo High Power 1.1KX amp and would like to know if my K3 SN 2704
has this ALC modification installed already? Is there a magic place to look
this up?
Thanks in advance,
Dave Anderson, K4SV
Tryon, NC
828 777-5088
www.K4SV.com
From
Elecraft will be attending both SeaPac (OR) and HamCom (TX) this year.
SeaPac is June 5th and 6th. Lisa (that's me) will be tending the booth
with help from Greg, AB7R and Roger, WA7BOC.
If you are attending and would like to help out at the booth to answer
questions about our products, please
The graph shows some interesting data for both impedance vs.
frequency and frequency response. It demonstrates why the
Sony MDR-6V are such favorites among CW operators.
They may not be much for low frequency isolation but the
frequency response and impedance/sensitivity (high) are a
very good m
Hello,
My K3 station is downstairs in the lab ... but there wasn't any place
for my K2. I brought it upstairs and put it on my desk where I could use
it conveniently. No antenna until I put one in the attic.
See the photos of the K2 and the antenna I kludged together at
http://wilcoxengineerin
Hi Dave,
Here is a direct link to the K3 ALC mod:
http://www.elecraft.com/K3/mods/K3ALCMod_Rev_B.pdf
Best 73,
Frank - W6NEK
- Original Message -
From: "Dave Anderson, K4SV"
To:
Sent: Friday, May 28, 2010 1:30 PM
Subject: Re: [Elecraft] ELECRAFT TO TOKYO HY-POWER 2.5
> Hi All,
>
> I h
This should really be answered by a Tokyo High Power dealer or
Authorized Service Center (but then ... )
Signal 2.5Kfx K3
Band A 3 13
Band B 11 3
Band C 4 9
Band D 12 14
Ground 5 5
PTTSE
The Elecraft Modifications/Updates pages indicates the modification
was added to production starting approximately S/N 2362. You can
download the documentation for the modification and compare it to
your rig.
73,
... Joe, W4TV
On 5/28/2010 4:30 PM, Dave Anderson, K4SV wrote:
> Hi All,
>
>
I have the Sennheiser HD 280 pro 64ohm, I also use
Creative ear buds EP-630 they work very well also
the price of the ear buds are very reasonable.
Regards
Art
ka9zap
On 5/28/2010 11:29 AM, Art K6XT wrote:
> I've had Sennheiser HD400 for many years (long since out of production
> but there is a n
Don you were right.
Q10 and Q11 were in wrong position with inverted pins.
Don it's incredible.
Thank'you.
73 de in3acv
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Mine works just fine without ALC. I Don't believe the anti-liability stuff
with ALC connections from amp producers. If you have your K3 using ALC and
provide a consistent output to your amp then it isn't an issue. If you try
to run over the 1.5kw limit for Amateur operation, it is an issue.
Bil
On 5/28/2010 3:04 PM, Bill W4ZV wrote:
> http://www.headphone.com/learning-center/build-a-graph.php?graphID[0]=1743&graphID[1]=533&graphID[2]=753&graphID[3]=1753&graphType=6&buttonSelection=Compare+Headphones
>
or go to http://tinyurl.com and paste it in there
you will get something like this:
ht
Yesterday was a pretty warm day and I had left my K3 (SN#4181) on into the
evening. When I sat down last night, I was very surprised to see that the
VFO was incrementing in a non-uniform and sometimes very erratic manner. I
tried all the resolutions and different bands, but the behavior was the
s
Thanks for everyone's help. You are really a great bunch and comfort knowing
that your help is there for the asking. I am sure I have all I need now (Just
waiting for the Cables to get here)
PHIL. www.n2bee.net
"Sometimes I think I understand everything, then I regain consciousness"
__
Stan Gibbs wrote:
>
> Yesterday was a pretty warm day and I had left my K3 (SN#4181) on into the
> evening. When I sat down last night, I was very surprised to see that the
> VFO was incrementing in a non-uniform and sometimes very erratic manner.
>
This is not normal and should be reported
Hi Joe,
Thanks much for the information. I'll contact Elecraft.
73, Stan, KR7C
-Original Message-
From: Joe Subich, W4TV [mailto:li...@subich.com]
Sent: Friday, May 28, 2010 5:54 PM
To: Stan Gibbs
Subject: Re: [Elecraft] K3 VFO encoder temperature sensitive?
Stan,
It's a bad encode
Thanks, Bill,
That seems to be the consensus. I'll contact Elecraft.
73, Stan, KR7C
Bill W4ZV wrote:
>
>
> This is not normal and should be reported to K3support at elecraft.com. I
> had a problem with one of my K3s I/O not working at low temps (unheated
> shack in winter) until it warmed
After doing a bit of looking I think the very low THD numbers on these
is also a big benefit. I've since looking ordered a set for Field
Day.
~Brett (N7MG) (Previously KC7OTG)
On Fri, May 28, 2010 at 2:09 PM, Joe Subich, W4TV wrote:
>
> The graph shows some interesting data for both impedance
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