Don and Igor,
I didn't think it out completely when I first posted. This is
because this is the first time I will use a HF amp. VHF amps nearly
all have RF sensed TR (Plus the means for PTT control). I do not
like RF sensing as I can not see how one avoids hot switching.
MY system for
One of my contacts in the UK has asked Yamaha why they don't distribute
the CM-500 outside the US. The answers he received were not very
convincing. He continues to negotiate with Yamaha, so at some future
date it may be possible to obtain the headsets here in Europe.
Charles
HB9EGW
Many thanks everyone for your responses to my request.
I am now investigating the Koss SB40 that appears to be similar to the Yamaha
headset.
Regards
Peter G3SMT
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Hi Peter,
The Koss SB40 looks physically identical. Makes you wonder if Koss makes
them for Yamaha or vice versa. Here in the US the SB40 is available for $30
plus free shipping from Amazon. Please let us know what you learn from your
research.
This would be a great find, if true. The SB40 is available in Europe,
for example here in Germany for 32 Euros from Amazon:
http://www.amazon.de/Koss-SB40-KOSS-Headset-schwarz/dp/B5ML7T/ref=sr_1_1?ie=UTF8qid=1329567287sr=8-1
If someone can verify that these are identical, it would help a
Koss makes a range of stereo headsets and Walmart sells them for much
less than does Amazon.
On 2/18/2012 7:11 AM, Mike K2MK wrote:
Hi Peter,
The Koss SB40 looks physically identical. Makes you wonder if Koss makes
them for Yamaha or vice versa. Here in the US the SB40 is available for $30
http://www.monacor.de/en/product-detail-page/?artikelid=2961
73 Win DK9IP
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This
Headphones look similar but mic and boom do not look identical.
73 to all
Geoff
G3UCK
-Original Message-
From: Mike K2MK
Sent: Saturday, February 18, 2012 12:11 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Yamaha CM500 Headset
Hi Peter,
The Koss SB40 looks physically
Ran across this link from last year but it still works. Just ordered mine.
$45, free shipping
Bill
KD8JxJ
- Forwarded Message -
From: Mark n2qt n...@verizon.net
To: Elecraft@mailman.qth.net elecraft@mailman.qth.net
Sent: Tuesday, January 11, 2011 5:44 PM
Subject:
Fun to know my K3/KPA wrkd their K3/KPA on 40m.
K9IL
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Agreed ... sure would like a command that could be used within a macro to
change the RX EQ settings, like the one for transmit EQ.
KD0HII - Brian
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of ab2tc
Sent: Monday, November
That looks nice and costs only 50 Euro. Technical data's are ok.
Seems to be worth for a test.
The next higher version is also nice:
http://www.monacor.de/produkte/buehnen-und-dj-equipment/produktauflistung/produktdetailseite/?artikelid=133
73's Erwin/DK5EW
Am 18.02.2012 14:00, schrieb Win Kriegl
Hi Geoff,
The only difference I see is that the Koss and the Monacor have a dynamic
mic insert.
The headphone are high impedance and seem to suit the K3, and the hf noise
seems to less of a problem even without the mods.
Since I normally only operate CW and PSK the mic does not bother me.
73
Tim
Agreed ... sure would like a command that could be used within a macro to
change the RX EQ settings, like the one for transmit EQ.
I do this with k3_ez with the eq page I have set to save several different
settings that can be sent to the k3 with a click of send to.
I have labeled a couple of
KPA-500 #698 sings beautifully. A great kit and Dale at Elecraft and Don,
W3FPR, were great in helping me resolve my one miscue. If you're squeamish
about taking this kit on, don't be...it is a breeze, just take your time and
enjoy as the kit building goes all too quickly! Now for the ARRL DX
Before I order the headset, I am curious as to what mic connector is provided
if any? I am supposing an 8 pin connector is a required purchase for my K3,
correct?
Griff...N5AG
--
View this message in context:
It has two 1/8 stereo plugs. One is for the headphone and one plugs into the
rear of the K3 in the mic jack.
73
Keith N8CEP
On Feb 18, 2012, at 11:18 AM, N5AG wrote:
Before I order the headset, I am curious as to what mic connector is provided
if any? I am supposing an 8 pin connector is a
Can anyone tell me what the benefits of TX equalization are?
73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member
Farmers have learned that rotating crops improves
productivity and saves the land. Voters should
improve productivity and save OUR LAND by
rotating
Dear OMs and Yls,
This may be slightly off topic but I at the heart of my operations is a K3
and perhaps another of our number is using a similar arrangement for
contesting and can give me a dig out.
I am using a K3, Micro Keyer II and WInTest for contesting and all was
working okay but no
You can plug the Yamaha CM500 microphone and headphone 3.5mm plugs directly
into 3.5mm jacks on the back panel, and use the K3's SPKR+PH capability
(which I have set up as PF1) to turn the speaker on and off. The K3 has a
back panel RCA connector that you may use for something like a foot switch,
How would it match up to on the K2.
Phil
G7BZD
On Sat, Feb 18, 2012 at 4:56 PM, Dick Dievendorff die...@comcast.netwrote:
You can plug the Yamaha CM500 microphone and headphone 3.5mm plugs directly
into 3.5mm jacks on the back panel, and use the K3's SPKR+PH capability
(which I have set up
The ad says it has a dynamic microphone. While that can be fine, IMX dynamic
mics vary widely in audio response and output level, unlike the ubiquitous
electret condenser mics that tend to have much higher output and an
extremely flat response.
Also, it's clear the headband and earphone support
Griff,
For the K3, nothing is needed, just plug the 3.5mm stereo connectors
into the rear panel mic and phones jacks. Set the microphone menu for
rear panel with bias.
73,
Don W3FPR
On 2/18/2012 11:18 AM, N5AG wrote:
Before I order the headset, I am curious as to what mic connector is
Ron,
Have you taken a look at the Koss SB40 that someone also found? Does
this look any better?
http://www.amazon.de/Koss-SB40-KOSS-Headset-schwarz/dp/B5ML7T/ref=sr_1_1?ie=UTF8qid=1329567287sr=8-1
73,
Mitch DJ0QN
On 18.02.2012 18:02, Ron D'Eau Claire wrote:
The ad says it has a dynamic
In radio communications, it's been long understood that a male voice sounds
best with an audio response the rises in output gradually to about 2.5 kHz
before falling off again.
The equalization controls allow you to adjust this response.
Modern condenser electrets mics are usually flat from
Thanks for the multiple replies. Y'all make life easier!!
73,
GriffN5AG
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Phil,
To match the Yamaha CM-500 to the K2, you can purchase the adapter used
with the Proset-K2 - and wire the microphone configuration header just
as for the Elecraft MH2 microphone - all pins jumper straight across and
add the 5.6k bias resistor between mic jack pins 1 and 6.
I thought I
Hello,
I have a Yamaha CM500 and looks exactly as Koss SB40 but this one in EUis
easy to get from Amazon and cheaper.
Both headphones have the same characteristics 120 ohm, 96 dB etc. and both
have Dynamic Mic.
Can some one who has a pair of these tell me if there is any electronic noise
reduction circuitry in the headphones or is it by physical isolation only
please?
Sorry to be off topic
Malcolm
G0MIC
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There is a way to download the audio file stored in the memory of the K3?
73, Fausto IK4NMF
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Heil Sound AD-1-K is the red adapter that has an 8-pin Foster microphone
connector, a 3.5 mm mono ack for the microphone, and a 1/4 mono jack for a
footswitch. It's suitable for a K3 as well as a K2 if you wire the
microphone configuration header appropriately.
The picture has the wrong color
If the UKeyer is showing the correct frequency, then the Ukeyer is talking
just fine to the K3, and you need to be on the Wintest logger reflector.
Do not throw your K3 out the window or call Elecraft tech support. K3 is
not involved.
Remove the USB cable from the Microham Ukeyer
Shut down
My Yamaha CM500 does not include electronic noise reduction.
The supplied battery box is for bias, and isn't required if you can get bias
elsewhere, like a PC microphone connector, or a K3 with microphone bias
turned on.
Dick, K6KR
-Original Message-
From:
Trying to get some operating time this weekend while doing school work.
I am connected to N1MM with KX3 #14 and interfaced with my SO2R box. No
problems so far with N1MM using the K3 setting as expected.
I have the KX3 connected to an OB12/6 yagi at 50ft (high winds today)
and running 5W.
Greg wrote:
One suggestion for folks who get this. Make your interconnect cables
from molded right angle plugs. Right now I am using adapters from 1/4
in down to 1/8 inch
Hi Greg,
Good advice.
Note that all of the cables we supply -- power, PC, and mic -- come
with molded
I'm curious. Once set, why would you change eq settings, especially receive?
73, Mike NF4L
On 2/18/2012 10:32 AM, Art Nienhouse wrote:
Agreed ... sure would like a command that could be used within a macro to
change the RX EQ settings, like the one for transmit EQ.
I do this with k3_ez with
Jamie,
Without regard to what that ad states, the CM500 has an electret element
- NOT a dynamic element.
I don't know about the Koss SB40, I could not find any reliable data,
but they seem to be universally advertized as computer headset and
since most if not all computer microphones are
The MicroKeyer II under the PORT tab does show the correct K3
frequency and does track the K3 but it does not track the band
changes of the UP Down Arrows used for band changing in WinTest.
Sounds like an issue with Win-Test not opening the CAT port in
microHAM Router correctly. Have you
I live near Milwaukee where the Koss factory is located. They have an
outlet store.
I'll try to stop in there this week and see if I can try on a pair
Stay tuned...
BTW...one of the best kept secrets about Koss is that they will do
lifetime repairs if their products fail. I have a
The weekly Elecraft SSB net will meet tomorrow (2/19/12) at 1800Z on 14.3035
MHz +/- QRM. I will be net control from western Oregon, and we'll try relays
to pull in the stations that I can't hear.
See you there.
73,
Phil, NS7P
__
Remove the USB cable from the Microham Ukeyer
If the ports tab is showing frequency and mode, there is no
reason to unplug the USB cable and/or restart Router. The
issue must be in the application software - either the wrong
port is selected or the data communications parameters are
After 2 weeks or so of happy operating of my newly assembled K2, Q7 exploded
with a loud snap. From what I read here, I'm going to have to replace the
whole transmit transistor kit. I did see that this failure has happened to
others, so I'd really like to hear if those who had the experience
Thanks, Jaime, then I will let you play guinea pig instead of me and
wait for your feedback.
73,
Mitch DJ0QN
On 18.02.2012 19:10, Jaime P.Ullivarri wrote:
Hello,
I have a Yamaha CM500 and looks exactly as Koss SB40 but this one in EUis
easy to get from Amazon and cheaper.
Both headphones
Now I am really excited. I saw the KX-3 at the Yuma hamfest and it is a n
absolute beauty. Also got to meet Eric, Lisa and the Elecraft gang. Really cool
people.
Keith
AG6AZ
Sent from my iPhone please excuse typos
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I understand that.
HOWEVER,
Remove the USB cable from the Microham Ukeyer
Shut down the Microham USB Device router program.
Do whatever Wintest requires to save the log (maybe nothing).
Shut down Wintest
Reinsert the USB cable to the Ukeyer.
Bring up the USB Device router.
Restart Wintest
George,
First, you do not have to replace the entire RF transmit chain, only the
two PA output transistors (Q7 and Q8) and the 2 2NAs that control
the PA bias (Q11 and Q13). Replace Q11 and Q13 first, and then measure
the voltage on the PA transistor base solder pads during a TUNE - it
Joe,
I found that the problem was with my Win-Test Setup, Options, Configure
Interfaces menu setup. COM8 is my RADIO 1 port, which needs to be
configured as 38400 BPS, 8 data bits and 1 stop bit. Somehow the
allocation had been dropped and data rate changed to 9600. I tried
reconfiguring
Keith,
I think you have committed yourself to a ride down the Elecraft Road -
it is a pleasant journey with a lot of surprises. Enjoy it.
73,
Don W3FPR
On 2/18/2012 3:29 PM, Keith Heimbold wrote:
Now I am really excited. I saw the KX-3 at the Yuma hamfest and it is a n
absolute beauty.
I am having trouble with my K3 tuner, the SWR jumps high when I turn it above
80 watts on 80m.
At first I thought it was something outside but after replacing open wire
feedline, balun, coax, I have come to the conclusion that the problem must be
internal to the K3.
The antenna is a 130'
On 2/18/2012 11:11 AM, Mike wrote:
I'm curious. Once set, why would you change eq settings, especially receive?
Different modes. I have a group of settings I use for SSB that attempt
to emulate the program in my hearing aids. Not near enough for me but
it's sure better than nothing. If I
You could play it into your computer and record it there.
Rick
K6LE
On 2/18/2012, at 10:19 , Fausto Coletti faustocole...@alice.it wrote:
There is a way to download the audio file stored in the memory of the K3?
73, Fausto IK4NMF
Ken,
Yes, I have the same problem.
Using a 102' doublet, open wire to a 4:1 outside the shack.
Works great everywhere above 160M but on 80 the SWR goes nuts over about 75
Watts.
My workaround has been to not run over 75 Watts :-)
Rick
K6LE
On 2/18/2012, at 1:40 , Ken wa8...@gmail.com
Ken,
A typical question when something like this arises is: What does it do
if you drive a dummy load?.
While another transceiver handling your antenna situation may also be
good to know, it does not satisfy the question of What does the K3 do
when driving a 50 ohm resistive load.
The
Thanks Don,
I've now pulled the remains of Q7 and also removed Q8. I checked the bias
and it is at .64 volts and present at both base pads. This is a K2/10, so
does that rule out the static antenna charge theory? I have a sort of crude
transistor check which consists of connecting ohm meter -
To be clear, Rick, is the KAT3 in BYPASS when you adjust the Palstar tuner?
It must be. Then, when you switch in the KAT3, you need to do a tune in
which it will adjust its settings to a 1:1 SWR on the link between the KAT3
and the Palstar.
There's no advantage to having both tuners in the
Rick and all,
Look for something in the antenna system that is arcing over above the
80 watt level (or whatever level the problem starts). Check every
junction in your antenna system. Your workaround may be OK, but the
real fix may increase your antenna efficiency.
The other situation that
OK, this is OT, sort of. It will be connected to my K3 so..
I just bought a remote mast mounted antenna switch (Ameritron RSC-8V). It comes
with the center conductor electrically floating when the port is OFF. It seems
to me I would be better off (safer) if the center conductor was grounded (or
On Feb 18, 2012, at 5:35 PM, Don Wilhelm wrote:
A typical question when something like this arises is: What does it do if
you drive a dummy load?.
Well, I don't have a true dummy load. However, since the problem doesn't
occur when letting the Palstar do the tuning (at either setting), I
No. When I moved the balun inside, it went from a 30' length of coax to a 4'
length. No change in the SWR jump.
Likewise no difference in the jump when changing from a 4:1 to a 1:1 balun.
It's difficult to change the open wire feedline length: If I shorten it, it
won't reach the antenna,
George,
OK, do check D9 for possible damage, or if you have the KAT2 installed,
there are wattmeter dides in that option that may have failed and could
produce the same thing as damaged diodes in the KPA100.
I am not saying the above is your problem, but I am saying, do check -
if you have a
On Feb 18, 2012, at 5:43 PM, Don Wilhelm wrote:
Rick and all,
Look for something in the antenna system that is arcing over above the
80 watt level (or whatever level the problem starts). Check every
junction in your antenna system. Your workaround may be OK, but the
real fix may
My trusty LDG Z-100+ tuner died last night. Luckily, it is one month
before the end of the two-year warranty so I will be sending it back for
repair. In the mean time, I am without a tuner. I do not know when (if
ever) I'd buy an amp, so I do not need a high-power tuner. I will be
using
Also, communications type dynamic microphones often have rather
uneven response curves. Some I've seen have way too much response
below 500 or 600 Hz. The equalizer can be used to compensate for this
response.
Electret (condenser) mics also show a bass boost when worked close as
with a
Sorry, I forgot to sign the previous...
Joel - W4JBB
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Normal practice is to connect the ground to the station ground buss. The
station ground buss may be connected to a ground system at the base of the
tower or somewhere near the station, provided it is ALSO tied directly to
the AC mains ground for the structure. The point is to be certain there is
I used the original AT-100Pro with my FT-857D for several years and
really liked it. For me, it did an admirable job. I don't have any
experience with the other two tuners. In fact, my K3 (#281) has the
KAT3 internal tuner. One push tuning and I'm done. No power
adjustments to remember,
Clint,
Not OT at all. Many remote antenna switches do it the easy way, and
use SPST relays to switch in the selected antenna - there is no way with
that type relay to ground the antennas that are not currently selected.
So yes, some type of static discharge device would be beneficial across
Thanks to all of you who replied that you have also experienced the same issue.
I guess I am not alone!
Maybe Wayne or someone from Elecraft will contribute some info.
73, Ken WA8JXM
On Feb 18, 2012, at 5:14 PM, Rick Prather wrote:
Yes, I have the same problem.
On 2/18/2012 3:15 PM, Ron D'Eau Claire wrote:
You guys in the warm climates really have it tough. Here on the Oregon coast
I'm a few hundred yards from the surf, close enough that it's a constant
background sound, and several times each winter we experience Cat 1 or 2
hurricane force winds
Sounds like my shack when I had RF problems. Strange SWR was one of my
problems also.
One thing I found is that I need to wind a big choke on the power leads
into the K3 to stop a lot of my problems. It was the last thing I did
to fix issues. I wish I would have know to start there :-)
~73
If you want to see a remote antenna switch that grounds all un-selected
antennas, take a look at http://www.qsl.net/ei7ba/remote.htm
It is quite easy to homebrew your own remote antenna switch.
73,
Don W3FPR
On 2/18/2012 6:26 PM, Don Wilhelm wrote:
Clint,
Not OT at all. Many remote antenna
One great solution is to put a good balanced link coupled antenna tuner
between the transceiver and the parallel feedline. I emphasize link
coupled because that alone will stop common mode current.
You can homebrew one, or look for a Johnson Matchbox.
73,
Don W3FPR
On 2/18/2012 6:33 PM,
On 2/18/2012 3:14 PM, Joe Subich, W4TV wrote:
Electret (condenser) mics also show a bass boost when worked close as
with a headset or close talked hand mic. That's why - in addition to
limiting hum and background noise - it's generally best to set the K3's
two lowest EQ bands to -16 and set
On 2/18/2012 3:15 PM, Ron D'Eau Claire wrote:
You guys in the warm climates really have it tough. Here on the Oregon coast
I'm a few hundred yards from the surf, close enough that it's a constant
background sound, and several times each winter we experience Cat 1 or 2
hurricane force winds
OK Don,
I pulled one leg of D9 and saw 54K forward and infinite reverse on the DVM
(no KAT2) so I'm guessing that's ok for a Schottky diode. I just now
checked the tuner taps and the antenna was charged up pretty good. . .that's
amazing since there's hardly a breeze and it isn't below freezing
I am trying to do the tx gain calibration. I am hooked into a 300w dummy dry
dummy load. When I run the test it dies on the 17m band and says:
Tx Gain calibration failed because power readings did not converge to a
consistent value
I really have no idea what this means, and I can't find any
These
http://www.monacor.de/de/JPG/1024/H/H2/H220300A.jpg
were on the ham market in DL some years ago, labeled *GB Sound* .They
were equiped with Heil Mics (HC4 or 5, could choose).
It is pretty much the same as a Heil, even the Heil earpads
fit. The original earpads are covered with cheap
The KAT3 is an excellent internal tuner and if you don't plan on ever having
an amp why not get one? If not there are a lot of good tuners out there. I
would look for an L network tuner as they are more efficient and more broad
banded than the differential T units out there. For high power work
George,
I would advocate 100 uHy rather than 50 mHy - but for 40 thru 10 meters,
50 uHy is OK.
If you really meant 50 millihenries, then yes that would be quite fine
for providing a DC path for the lower bands, but there may be strange
effects on the higher bands due to stray capacity.
73,
After a career that started in the recording studio, spent time in
radio and then as a TV audio man before moving into management, I've
done a lot with voice equalization ...
I use a Heil Elecraft ProSet with the electret mic. My Audio Elmer
[K9YC] suggested setting the TX EQ:
0.05 -14
Temporary conditions mandate that I offer up the following for sale:
K3/100 serial # 3019, equipped with
KAT3
KBPF3
KXV3
KIO3
KNB3
MH2
KFL3A-6K
KFL3A-2.7K
KFL3A-500
KFL3A-200
When new this cost somewhere around $2800. The rig is in excellent
Don makes an excellent point. And a really cheap and effective way to do it
is to put a resistor from each antenna hot side to ground. For a 50-ohm
transmission, 500 to 1000 ohms is fine. That will bleed off any charge
building up on the antenna but will be too high of a value to affect the
This unwanted effect is largely avoided by using a communications mic
correctly - speaking *across* the front of it, not into it. A boom mic that
will reach the front of your face should be positioned *below* your mouth.
Note that most newer boom mics stop short of the mouth. That automatically
After getting the HiCur message, I replaced the two PA transistors, the
associated hardware, Q11 and Q13, and R50. Unfortunately I stll get the same
message: HiCur when I press TUNE with power any higher than about 1.5 watts
inot a 50 ohm dummy load. Any have any ideas about what else
Well, you and Jim seem to move in the same audio circles. I think you
may be right, more the derivatives than the actual numbers, but mine
sure work good. I will confess, I had no idea what to do with all these
TX and RX EQ #'s without help from my Elmer.
73,
Fred K6DGW
- Northern
Ron: Whatever made you think this was an unwanted effect? :-) I
loved it as soon as I figured it out! [Pgm Mgr didn't all that much but
it was 0600 and he wasn't awake yet]. I loved it, Johnny Cash wasn't
quite as famous then but he's the first person I can think of that I was
trying to
It's an unwanted effect for those looking for best communications quality.
Ron AC7AC
-Original Message-
Ron: Whatever made you think this was an unwanted effect? :-) I
loved it as soon as I figured it out! [Pgm Mgr didn't all that much but
it was 0600 and he wasn't awake yet]. I
Yes I see, the advert is wrong but I think the Koss is also electret, just a
few days to know.
I don't plug my CM500 directly to the K3, it is connected with its battery
to a NCS Multi=Switcher, I use it with other rigs also, so I have the K3
bias OFF.
I will try the Koss directly to the K3
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