This one
http://ludens.cl/Electron/Ps20/Ps20.html
I tried it, it is almost perfect and very simple construction, rugged
enough. If you use a high quality toroidal transformer you will probably
need a soft start circuit (limiting the inrush current when switching on).
This one
“Yes, BUT -- these are passive networks, and the response of all passive
networks depends upon the source Z and the load Z at each port. I'll bet your
measurements were for 50 ohm sources and 50 ohm loads. Real world antennas
differ widely from 50 ohms even when they are close to resonance on
Bill,
I am not familiar with that router, but I can only warn you and everyone
else on the reflector to NEVER, EVER use port 5060 as the SIP port for
your RRC. This port is the standard SIP port and is therefore already
used (i.e. effectively blocked) by many routers. I would say that about
Hello,
I'm playing with the serial commands for the W2 wattmeter.
First question, how often can I poll it? My main loop polls for status,
forward, reverse and swr, then waits for a keypress for 0.2 seconds.
Is it safe to reduce to 0.1 s?
Then, in the output of the 'i' command, bytes 2 and 8
Can someone please send me the correct size/dimensions for the KAT500
power plug. I cannot find it anywhere.
Thanks,
Dan -- N3ND
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Dan,
As with other Elecraft gear, the power plug is a 2.1mm coaxial jack.
A power cable is supplied with the KAT500.
73,
Don W3FPR
On 1/19/2014 11:11 AM, Dan Atchison wrote:
Can someone please send me the correct size/dimensions for the KAT500
power plug. I cannot find it anywhere.
Thanks, Don. Several different coaxial plugs fit the jack, but wanted
to make sure my friend purchased the correct size. Unless I am blind, I
could not find this kind of information in the manual. An oversight, I
guess.
73,
Dan
On 1/19/2014 11:19 AM, Don Wilhelm wrote:
Dan,
As with
I spoke to an Elecraft employee about bugs in the W2, and he confirmed
that there are a number of them and that they are planning to come out
with a new version of the firmware at some point (I don't want to say
'real soon now').
The manual IS incorrect about the alarm needing to be turned on
Vic == Vic Rosenthal K2VCO k2vco@gmail.com writes:
Vic I spoke to an Elecraft employee about bugs in the W2, and he confirmed
Vic that there are a number of them and that they are planning to come out
Vic with a new version of the firmware at some point (I don't want to say
Dan,
One place in the manual that the size of this plug/jack is mentioned is on
pages 3, 5, and 7 which give the description of the connections to the
device. Referencing figure 1, item 2 is given as Two wire power cable with
a female 2.1 mm coaxial connector (supplied). This is the same 2.1mm
Phil and Don,
Lighting is key to seeing detail, small objects. In high light the
pupil constricts and depth of vision improves. These concepts well
known to camera buffs. Want sharp image get higher light levels,
better f-stops, shorter exposure time. I used to have a macro-lens
for a
I am a a rookie in the ham world so I feel a little funny posting this. I have
built a KX3 and a K3. I bought something called AX7-C electrical contact
anti-corrosion protectant lubricant. The bottle has web site
www.rc-electronics-usa.com. I found if I coated all of the pins and slide
I am a a rookie in the ham world so I feel a little funny posting this. I have
built a KX3 and a K3. I bought something called AX7-C electrical contact
anti-corrosion protectant lubricant. The bottle has web site
www.rc-electronics-usa.com. I found if I coated all of the pins and slide
Hello,
I push this message again, because I have the same question / issue...
I am building a specific Arduino interface between a microHam stationMaster
and the KAT500, but unfortunately I am not able to find any wiring/voltage
concerning this serial «3.5 stereo jack» connector.
If someone has
On at least one occasion when I thought my amplifier had blown up, and it
turned out only to be a bad coax cable in the shack. So even when testing
by running the amp directly to a dummy load, it's a good idea to try more
than one coax cable.
73,
Dick- K9OM
In a message dated
The KX3 schematic shows the following:
RxD = tip
TxD = ring
GND = sleeve
-
73, Stan - KR7C
--
View this message in context:
http://elecraft.365791.n2.nabble.com/KAT500-serial-cable-tp7579847p7583086.html
Sent from the Elecraft mailing list archive at Nabble.com.
On 1/19/2014 1:50 PM, Stan Gibbs, KR7C wrote:
The KX3 schematic shows the following:
RxD = tip
TxD = ring
GND = sleeve
My computers have serial ports, but the cable from Elecraft was USB. I
made myself a serial cable for my KAT500 from a hi-fi cable with a 3.5mm
TRS plug on one end, split
I'd like to correspond with someone who has this setup and has it
successfully operating on a Windows 8.1 computer offline. My frustration
level is high and I want someone able to take me through the connection
and setup step by step. jnme...@southslope.net
Thanks
73
Jim NO0B
---
This
The KX3, KAT500 and the XG3 serial cables are the same at the
equipment end - whether they are USB or serial.
They are not entirely RS-232 complaint - the level for TXD is zero volts
to 5 volts, but RXD will accept the full RS-232 positive and negative
swings with no problem (hopefully I did
On Sat, 18 Jan 2014 19:55:58 -0500, Bill W2BLC wrote:
I did a similar test using a dummy load (Mil-Spec 2 kW) with the KAT500
in line and carried on a QSO while watching all the meters. After
about 45 seconds the tuner went nuts and started a retune - with no
change in frequency etc.
OK,
In fact I planned to use a MAX232 because I though that it was necessary
for the kat500.
At the end it seems that the kat500 is TTL compatible, so it should be
easier to connect with an Arduino.
If I am right, a direct connection should be possible, without MAX232.
Anyone to confirm?
73
Jean,
I mis-spoke. I do not have the schematic for the KAT500. but the
circuit for the RS-232 interface used in the XG3 has become sort of
the standard at Elecraft as far as I know. I initially said it went to
+5 volts, but after checking I see it can go to +9 volts. If your
Ardrino TTL
Is it possible to have the tune button send cw did’s for tuning a Amp.
Chris W7CTH
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I can't speak for Elecraft, but the conversation took place in the last
couple of weeks. I also suggested that they add a net power display
mode (forward - reflected) like the Alpha 4510 and Telepost LP-100A
wattmeters have, since this more closely approximates what we understand
as power
On 1/19/2014 3:46 PM, Don Wilhelm wrote:
I do not have the schematic for the KAT500. but the circuit for the
RS-232 interface used in the XG3 has become sort of the standard at
Elecraft as far as I know. I initially said it went to +5 volts, but
after checking I see it can go to +9 volts. If
Anyone have a schematic to get a K1-4 on 160 meters ???
BYRON / N4AX
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Hi Jim
tried to send to you directly - but 'hidden email' didn't work:
I have K3, P3, KAT500 and KPA500 with Navigator to Win 8.1 system
working fine - just had to redo the whole thing due to an 'house issue'
73 John VE3NFK john.turgooseatgmail.com
ps understand frustration :-)
I'd been looking at cheap and dirty between another TTL level device to
the KX3 (I presume the KXPA100 is similar). The KX3 schematic looks as
if the putput may go as high as +12V, but a series resistor and diode
clamp at +5V should protect a TTL equivalent input. I used to know good
values,
Consider using a MAX232 anyway. The signals need to be inverted to be
compatible with standard UART interfaces. So even if the protective diodes
work, an inverter is needed to get the signals to the proper levels.
Jack B, W6FB
On Jan 19, 2014, at 6:03 PM, Doug Faunt N6TQS +1-510-717-1197
If you're bit-banging, you can do the inversion in your software.
73, doug
On 19-Jan-14 18:39, Jack Brindle wrote:
Consider using a MAX232 anyway. The signals need to be inverted to be
compatible with standard UART interfaces. So even if the protective diodes
work, an inverter is needed to
Seahawks in the Superbowl -- Go Hawks!
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I have ordered a Signaink USB for use with my K3, primarily for PSK31 and
JT65A operation, and expect delivery on Monday.
Does anyone have any precautions or hints on proper setup of the Signalink
for use with the K3? I use Windows 7 running on a Mac under VMWare Fusion.
73,
Bob - N7RJN
Byron,
Not possible.
The K1-4 has only 2 low pass filters, one has a cutoff frequency above
the 30 meter band and works well for both 40 and 30 meters. The other
has a cutoff above the 15 meter band and works well for 20, 17, and/or
15 meters.
You could use the lower band for 160 meters
hope you bought the SignaLink™ USB with cable for the Elecraft K3's rear
panel Line In/Out and PTT jacks, make it a snap to connect
only catch is Win7 has separate controls for each piece of audio
hardware, so you have to also set up the Win7 Playback and Record for
the SignaLink USB, as well
Sam,
Thank you. Yes, I did purchase the special Signalink cable for use with
the K3.
Are there any special K3 setup menu options that need to be set up for use
with the Signalink?
73,
Bob - N7RJN
On 1/19/14, 9:29 PM, Sam Morgan k5oai@gmail.com wrote:
hope you bought the SignaLink USB
Hi Bob -
I've used the SLUSB on both a K3 and a KX3 with success. The K3 had it hooked
to a MacBook AIr laptop; when I moved the SLUSB to my KX3, I hooked it to an
iMac. Nothing special needs to be done on the K3. In my case I ran native in
the Mac OS X environment. For PSK31 I used cocoaModem
I've found it best to use minimal K3 output (Lin Out 1) and maxing the
levels on the SLUSB drivers. Ideally, you want a sprinkling of snow on the
waterfalls, not a blizzard. I also max the driver TX level then adjust the
Data A level to the proper level. The knobs on the SLUSB are kept at noon
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