Others have answered the power-per-band issue. If you are seeing power
overshoot from the K3 then you should do a recalibration of the K3 power.
JackB, W6FB
Sent from my iPad
On Mar 23, 2014, at 9:31 AM, Dick Frey k4xu.1...@gmail.com wrote:
I am bringing up a new (to me) K3.
What makes
What kind of cables are you using between the PC and the K3? If shielded, are
you sure the shields are connected to the DE9 shell at both ends? The RF
_could_ be getting into the conductors and causing problems in the
computer/serial card and not actually the K3. The computer could then be
by the “off” transceiver for any reason, you
can expect weird things to happen.
Jack Brindle, W6FB
Elecraft Engineering
On Apr 22, 2014, at 5:04 PM, Phil Hystad phys...@mac.com wrote:
Don,
OK, I may be expecting too much. Actually, I am not sure if I was expecting
as much as I was a little bit
Check the transceiver. The KPA has constant gain, and nothing that allows it to
change power as you describe.
If you use a K3, then reconsider your choice to use ALC. It is not recommended,
nor is it needed with the KPA500. You also might consider recalibrating the
transceiver to eliminate
Larry has it right. The 8-pole filters are from our good friends at Inrad,
while the last time I checked the 5-pole filters are in-house. from my own
experience, both are excellent. But then I could be accused of being a wee bit
biased... :-)
JackB, W6FB
Sent from my iPad
On Apr 27, 2014,
. Give them a
shout if need be. As you already know, thee are a lot of cool features to the
K-system, we want you to enjoy them. Just have to get things going first...
Jack Brindle, W6FB
Elecraft Engineering
Sent from my iPad
On May 1, 2014, at 9:43 PM, Ben Collins-Sussman suss...@red-bean.com
That iMac is a wonderful system, with one of the best monitors available. In
fact, there is a way to adjust the height of the monitor - you just need a
different stand. I believe the iMacs are designed to accept a VESA monitor
adapter, which would allow you to set the computer at pretty much
me that there is an
incompatible signal connected, probably the power-on signal.
So, my suggestion. Use the cable with all pins intact between the KPA and K3.
Use the other cable from the K3 to the KPA. That should work just fine.
Jack Brindle, W6FB
Sent from my iPad
On May 2, 2014, at 8:08
Brindle, W6FB
Elecraft Engineering
Sent from my iPad
On May 2, 2014, at 9:28 AM, Jack Brindle jackbrin...@me.com wrote:
Interesting.
I have a slightly different take. The two cables should be identical, with
the same pins missing. If the cable is broken, as Don suggests, you would see
very
I would take issue with your answer to #1. It really depends on your situation.
For most of the folks on this list your answer very well may be correct. In
areas where there is very high station density, it probably is not. Here in
Silicon Valley there are a LOT of very strong near-by signals.
Jerry,
Why do you say it has been corrupted? This is exactly the purpose for the
Roofing Filters in the K3.
Jack B, W6FB
On May 12, 2014, at 9:33 AM, Jerome Sodus jso...@comcast.net wrote:
Hello Bill,
The term roofing-filter made sense back in the 1980's when I designed
roofing-filters at
for the
TS480. I think it is that pin, but
will need to check it. Also look at the KRC2 manual for the proper W jumpers.
I’ll also take a look and privately
email you what I come up with.
Your station should work quite well in this configuration. Good luck!
73,
Jack Brindle, W6FB
Elecraft Engineering
will cause it to come to life. This information is
described in the KPA500 Programming Reference.
Now, if you would like to respond to my email, we will work with you to see if
you can get your setup closer to the way you really want it.
Jack Brindle, W6FB
Elecraft Engineering
On May 26, 2014
, but a
severe RFI problem caused the effort to be abandoned. Boy have things come a
long way since.
Jack Brindle, W6FB (ex-WA4FIB)
On May 28, 2014, at 6:19 PM, Daniel Allen dl...@bellsouth.net wrote:
And Radio Shack started selling the TRS-80 on August 3, 1977. I bought one
on that date
communication. If there
is no computer, connect the two directly, then set the KPA’s SER POLL menu item
to ON so that it will send serial commands to the K2 to get the band.
Enjoy the setup!
Jack Brindle, W6FB
Elecraft Engineering
On Jun 7, 2014, at 4:24 PM, Robert G Strickland rc...@verizon.net wrote
can’t get you going with it
today, then be sure to contact tech support tomorrow.
Jack Brindle, W6FB
Elecraft Engineering
On Jun 8, 2014, at 6:40 AM, Jorge Mejia lauss...@me.com wrote:
Hello list members
I just finished putting together a KPA 500 which seems to be having problems.
When I
It is not a good idea to connect pin 8 of the K3’s AUX IO connector to pin 8 of
the KPA500’s AuxBus connector. The two aren’t compatible. While both need to be
pulled low to power on the device, the K3’s pin stays low, while the KPA needs
for its pin to go high since it is in parallel with the
. In K3 mode, it receives
band data through the BCD lines.
So how can we help you to get your station going properly. After all, we
NCCCers do want your QSOs… ;-)
Jack Brindle, W6FB
On Jun 19, 2014, at 9:52 PM, Dick Dievendorff d...@elecraft.com wrote:
Randy:
The KAT500 has four ways
Rich;
Since you are talking about the K3, I believe your conclusion to be correct,
but I would not (yet) rule it out. I don’t believe that the K3 outputs the
RxAnt status on the Auxbus. Interestingly, the K2 _does_ output the Rxant
status, and the KRC2 can respond to that inout, although it
sigh This is not a difficult problem to solve. First off, the MacBook Air is
_not_ a netbook. Netbooks are defined by their low-power processors (typically
Intel Atoms). The MacBook Air has a full multi-core Intel I5 processor, which
means it can do real work.
The best way to approach this is
, it sounds like something is causing the 60V power
supply to stay on. Just to make sure, is this what you are saying?
Did you recently open up the KPA, move cables, or anything like this?
Jack Brindle, W6FB
Elecraft Engineering
On Jul 20, 2014, at 7:40 AM, T Gahagan wa7...@gmail.com wrote:
I’m
Godo questions. The power sequencing key is that the KAT500 must be powered
before the K3 initializes the Auxbus. You actually have a little bit of time
after the K3 powers on before this happens, and the KAT500 powers up quickly to
wait for this activity, so if you were able to power the
. I've just had to
add a Rigrunner to power more devices in my wireless station.
'Tis a pity that the KAT500 can't treat the bus like the KRC-2 and KPA500.
Wes N7WS
On 10/4/2014 7:20 PM, Jack Brindle wrote:
Godo questions. The power sequencing key is that the KAT500 must be powered
There should be a blocking adapter in the cable kit that should be attached on
the K3 side of the AUX cable. This is used to block the INHIBIT# and other
signals that should not actually go to the KPA from the K3. Some signals are
already cut in the cable, but there are some that actually might
Hey Randy. Ready for a surprise?
The FTDI driver is actually built in to Yosemite. Mavericks, too. That
means you don’t need to download the driver from FTDI. Why is this important?
In Yosemite, drivers must be signed. The ones on the FTDI site are not.
I didn’t believe this when I first heard
But can he hear you? It is quite common for stations on the same frequency not
to be able to hear each other. It could be due to power differential,
propagation conditions, or other similar situations.
If you are running very low power, but with a received (such as the K3) that
matches very
Check for something arcing in the antenna system at higher power. This would be
something that heats
up before the arcing starts, like maybe a grounding RF choke on a vertical or
something similar. The
worst feedline component for this is the cheap right-angle UHF adapter. The
center conductors
Hey Vic;
Hope you are enjoying life in Israel. Someday I'd love to visit the country.
Strange not having you over here, though.
As for the original KPAs, I can assure you that at this time there are no
functional units. There are a lot of wild rumors on the list in this topic,
most very much
for three days. It was a beauty!
http://www.n6ie.com/Elecraft.html
73,
Scott, N9AA
On 12/13/14, 3:10 PM, Jack Brindle wrote:
Hey Vic;
Hope you are enjoying life in Israel. Someday I'd love to visit the country.
Strange not having you over here, though.
As for the original KPAs, I can
No. I doubt if the internal 12V regulator in the KPA has enough spare capacity
to run the KAT500. I certainly wouldn’t want to try it, and strongly suggest
others not to.
Jack B, W6FB
On Dec 17, 2014, at 11:09 AM, Tom Warren mtn...@hartcom.net wrote:
Is there a way to get 12v from the
Let me rephrase my answer. There is no 12V output form the KPA500. The internal
12V regulator is pretty well loaded, taking most of the capacity of the
regulator. The KAT500 needs upwards of 1 amp when the relays are switching, and
there is not enough capacity in the KPA’s regulator to handle
I’ll go beyond this. CocoaModem allows for decoding two streams simultaneously.
I feed the main receiver to the left channel, and the K3’s sub receiver to the
right. Of course only one channel can be used for transmit since Wayne hasn’t
developer a sub transmitter yet. ;-)
Other digital apps
From the discussion that you referred to, I would recommend the use of thick
copper braid to bond the grounds of your equipment together in order to
reduce grounding problems. This is far better than using a copper bar or a
single point ground in a star pattern.
Now just what problem are you
Sam;
It sounds like the Auxbus is no longer connected from the KPA to the KAT/ K3.
Make sure the 15 pin connector is solidly connected on both sides at both the
KPA and the KAT. Also, make sure no pins in that cable are bent.
- JackB, W6FB
Sent from my iPad
On Dec 22, 2014, at 6:26 AM, Sam
from my iPhone
On Dec 22, 2014, at 7:16 AM, Sam Morgan k5oai@gmail.com wrote:
That was my thought Jack. I just re re checked, no bent pins, and both ends
firmly reseated. no joy :-(
On 12/22/2014 8:43 AM, Jack Brindle wrote:
Sam;
It sounds like the Auxbus is no longer connected from
The KPA500 is my work, so I’ll try to answer…
See discussion below.
On Dec 24, 2014, at 9:22 PM, James Bennett w6...@me.com wrote:
First, let me wish all a very Merry Christmas!
And from the W6FB family as well!
OK, now the problem. I have a KX3 and the full K-line: K3, P3, KPA500, and
It is also very important to use the small disconnect adapter that came with
the cable kit to make sure the pin 11 connection is not made at the KPA500. Pin
11 of the KPA500 is not compatible with the PR6's control pin, and must not be
connected to it.
- Jack Brindle, W6FB
Sent from my iPad
Make sure the big toroid power transformer is tightened down properly. The
tendency is to avoid tightening it too much, fearing some damage will occur.
The transformer needs a bit more than that. I'm sure you will get a better feel
for it shortly.
- JackB, W6FB
Sent from my iPad
On Dec 31,
Unplug the AUX IO cable from the KPA500 and try powering it on. If the Power
ON/OFF signal
is held low it will prevent the KPA from powering on. It might be that you have
connected the
KPA to the new K3 with a straight-through cable, which will cause this problem.
The KPA _will_ power on if the
now gets this same treatment,
which has quieted things immensely as far as RF is concerned. See the excellent
paper by K9YC at his web site for details on how to handle this stuff. The url:
http://audiosystemsgroup.com/RFI-Ham.pdf
- Jack Brindle, W6FB
On Jan 28, 2015, at 11:15 AM, Jeff Hall w
That would not cause the KAT500 to shut down, though. In the situation you
describe the KPA500 would continue to output power unless the HV supply drops
below 40V. What I am saying is that if the 117V power supply on the KPA500
sags, the amplifier will just keep going, using what it gets. The
Do you have the Auxbus adapter in place on the KPA500 end of the cable on the
second system? Pin 11 on the KPA side should not be connected to the preamp.
This might be causing problems if it is connected.
- Jack B, W6FB
Sent from my iPad
On Jan 5, 2015, at 7:10 PM, zumbruns
The W8AMZ is a 1/4 wave vertical with two radials. This means that all of the
return currents are expected to go through those two wires. Except there is a
third that is very appealing to the antenna - the coax shield. You might try
adding more radials. That will distribute the return current
...@yahoo.com wrote:
My line voltage is 239 (which calls for the yellow tap) but on Key down it
sags to 59v
With the Red Tap it only sags to about 66v (80.7 no key)
So The proper tap would be?
From: Jack Brindle jackbrin...@me.com
To: Harry Yingst hlyin...@yahoo.com
Cc
to your line voltage as described on page 9 so that it
gives you nominal HV in the range as described on page 17.
- Jack Brindle, W6FB
Elecraft Engineering
On Mar 22, 2015, at 11:49 AM, Harry Yingst via Elecraft
elecraft@mailman.qth.net wrote:
In the manual on page 9 it shows to set
there…
Jack Brindle, W6FB
Elecraft Engineering
On Mar 22, 2015, at 2:33 PM, Harry Yingst hlyin...@yahoo.com wrote:
Thank you, That was how it seemed I just wanted to double check.
That amp seems a bit happier on 240 than 120.
From: Jack Brindle jackbrin...@me.com
To: Harry
, the K3 goes to 2 meters. Otherwise it will go to 10 meters. In
all cases what the KPA does is determined by the state of the K3’s
BAND outputs.
Then there is the other answer - it has provided many, many questions about its
use. ;-)
- Jack Brindle, W6FB
On Mar 15, 2015, at 11:27 AM, Jim Miller j
Mike;
It is definitely a cable problem. If the asterisk is not being displayed on
key-down, then the
amplifier is not going to go into transmit. recheck the cables all the way from
the K3 to the KPA
to see what came undone. Find and fix that and the KPA will come back to life.
You might want
When you key the K3, does an asterisk show up on the left side of the KPA’s
LCD? If not, check the AUX or PTT connections to the KPA500.
Otherwise, let me know so I can follow up with you to get you going.
- Jack Brindle, W6FB
Elecraft Engineering
On Mar 15, 2015, at 10:02 AM, mike ai
the 2 meter transverter.
- Jack Brindle, W6FB
Elecraft Engineering
On Mar 15, 2015, at 6:21 PM, Harry Yingst via Elecraft
elecraft@mailman.qth.net wrote:
Mine does the same
Maybe a feature request to have the display in the KPA500 to show AUX?
From: k...@arrl.net k
experiments come out.
- Jack Brindle, W6FB
Elecraft Engineering
On Mar 20, 2015, at 6:14 AM, j-meis...@comcast.net wrote:
Setup is Yaesu FTDX3000 xcvr -- Elecraft KPA500 amp -- LDG AT1000ProII
tuner. I am using a cable
between the FTDX3000 and KPA500 to transfer band data and the key
That is the right cable. You can use it between the K3 and KPA, the KPA and KAT
or the KAT and K3. Remember, the correct cable configuration for using all three
together is the AUX cable from the K3 to the KAT500, then another from the
KAT500 to the KPA500.
Enjoy your K-Line!
- Jack Brindle
Standard 18-gauge computer cords can get pretty hot with the KPA500. They carry
a lot of current (over 10 amps at 117V), and six feet of 18-gauge has
surprisingly substantial resistance.
What you really want is a heavy-duty power cord such as is used with servers.
The heavy duty cords that
ASCII? That is a character set that is a subset of Unicode, which is now used
on all modern computers. It isn’t something you program with, it simply
represents characters. On the Mac we do not use ASCII coded characters, but
rather Unicode characters, usually coded in UTF-8.
What is it that
might be easier for someone who is just starting out to
learn. I am not sure which would be easier to learn, Objective-C or Swift
but I think Swift, being more modern and also supporting scripting is
easier.
73, phil, K7PEH
On Feb 21, 2015, at 9:30 PM, Jack Brindle jackbrin...@me.com wrote
between 100 and 600 watts is that at 600 I feel like I am
heard.
I am sure you will hear from others on the power comparison and the KPA500
operation as well.
- Jack Brindle, W6FB
Elecraft Engineering (like I said, I’m a bit biased…)
On Apr 23, 2015, at 9:42 PM, Fred Jensen k6...@foothill.net
customer support and you may avoid shipping the amp
back.
- Jack Brindle, W6FB
Sent from my iPad
On Jun 21, 2015, at 8:16 AM, Ray W2RS via Elecraft elecraft@mailman.qth.net
wrote:
My KPA500 amplifi_es_ (file://\\es) normally but seems to have a
switching problem on receive. The receiver
that the PTT line is engaged or shorted. fix that
connection and things should return to normal.
There are several things that could be causing the trouble you see. Work
through them with Elecraft customer support and you may avoid shipping the
amp back.
- Jack Brindle, W6FB
Sent from my
Mike, just how are you wanting to control the switch? If it is band-based, then
just wire up the RCS-10 to the appropriate terminals in the KRC2, connect the
KRC2 to the K3, and thing should start working. Are your needs more than this?
The best way to use the KRC2 with the K3 is using the
Lyle, I seriously doubt that, given the task of having to dupe and cross-check
500 or a thousand QSOs in a contest, that even you would be so nostalgic as to
do it with the paper dupe sheets we used to have to use. These days if you are
logging on paper you have already lost the contest…
73,
Reference has been seeing a lot of
update activity recently. If you haven’t downloaded the latest, you may be
missing out on some interesting stuff.
Jack Brindle, W6FB
On Jul 4, 2015, at 11:57 AM, Byron Servies by...@n6nul.org wrote:
Hi,
See the KRC2 manual and search for AC1. On Page 15
the serial port, nor does the transceiver have the ability to make
that request using the serial port instead of Aux I/O.
- Jack Brindle, W6FB
On Jul 5, 2015, at 10:47 AM, Jack Brindle jackbrin...@me.com wrote:
Byron is on the right track here. The best way to control the KRC2’s ACx pins
Yes. Check the KAT500 specs on page 2 of the KAT500 manual. The tuner is
limited to matching no more than a 10:1 SWR in the HF range, and lower at VHF.
Note that this is specified for 500 watts of power, so you may be able to get a
little more. 13:1 indicates a very bad match, however. You will
You should be looking for a USB-C docking adapter. It supplies power for
charging and extends the USB for devices to connect.
They are relatively new - there aren’t that many USB-C systems out so far, so
you should expect them to be somewhat expensive.
But, the adapters are available. I know
it in and it will work.
- Jack Brindle, W6FB
On Jul 22, 2015, at 2:58 AM, Joel Black joel.b.bl...@gmail.com wrote:
Not sure if this is worth the email or not (my last question about the NF of
the KIO3B did nothing but raise the NF of the list, got hi-jacked, and then
lost in the ether).
I
Cool! Please publish the specs. How secure it it? SSL? TLS 1.2 (or better)?
Will there be accommodations for upgrades as security problems are found?
Does it do ipv6 (which is rapidly becoming a requirement)?
My concern is this - we are putting a rather powerful transceiver on the
internet.
Paul;
What is your proposal for the host-side interface? Pretty much all host
programs these days use a serial interface. We usually use this through a
USB-Serial adapter or through built-in serial ports, which are rapidly
disappearing. To make this viable we would need drivers for all major
for it to work properly.
Your next question will be which KRC2 terminal is selected when this is set
properly. For the standard (factory default) bandmap it will be the XV1
terminal. Of course you can remap it as you desire with the KRC2 Utility.
73,
Jack Brindle, W6FB
> On Oct 20, 2015, at 7
What else do you have connected to the K3, specifically the serial port.
Overly strong signals will general kick in a relay to protect the front end of
the receiver and not
enable the attenuator. Is it possible that something else is enabling the
attenuator, like maybe a command
from a computer
try reseating these cables to make sure they are
connected properly.
- Jack Brindle, W6FB
Elecraft Engineering
> On Nov 15, 2015, at 12:24 PM, Mark Goldberg <marklgoldb...@gmail.com> wrote:
>
> I will contact Elecraft tomorrow, but posting in case someone
> recognizes the symptom
to K3.
Is there anything else connected to the AUX IO ports on either the K3 or KPA?
- Jack Brindle, W6FB
Elecraft Engineering
>
> On Oct 30, 2015, at 10:23 PM, NE9U - Jasper <skjas...@att.net> wrote:
>
> Just hooked a new kpa500 to a k3.
>
> when switching bands on t
in kpa500 is set to k3
>
> i also updated all firmware yesterday thinking that might helpno change.
>
> scott
>
>
>
>
> Sent from Republic Wireless Cray-1
>
>> On Oct 31, 2015, at 12:28 AM, Jack Brindle <jackbrin...@me.com> wrote:
>>
that sell these cables,
just make sure they are not VGA cables when you purchase and use them.
73!
Jack Brindle, W6FB
> On Oct 12, 2015, at 8:40 AM, j...@kk9a.com wrote:
>
> I am setting up my newly purchased K3S and I have three devices that use
> the same ACC jack on the transceiver.
They are on. The Elecraft rigs sound great (of course, I’m a bit biased)…
I worked them on 21285 SSB a short time ago. They are presently very readable
here in Northern California.
Propagation conditions are much better today than yesterday with much lower QRN
caused by solar
conditions
BCD signals, they only listen to them. That means that both must
respond to RF data to determine band changes, unless you find some way to tell
both (independently) the new band. Perhaps the DXLabs box can perform that
function. It is possible for a KRC-2 to do this function, although I have
Or connect the Kenwood’s serial port to the KPA500’s Radio port, then set the
RADIO = SERIAL in the KPA.
Follow the directions in the KPA manual. This is exactly what that serial port
is designed to do. Make sure you
use the RADIO port, not the PC port for this.
If you connect the serial port
Jim;
Dick’s advice is sound. When in OPER mode, the KPA will display an asterisk on
the left side of the display when PTT is applied. If you are seeing that
indicator, check the PTT connections to see if there is a short to ground. When
using the KPA with your K3S, you should only use the AUX
Works just fine for me. I use a powered USB hub. A standard USB port can
deliver a maximum of 500 mA for USB2 ports, or 750mA for USB ports. That should
power a lot of USB-Serial ports, but as they say, your mileage may vary.
I use an FTDI four-port USB adapter (it’s a development device from
again taking great care to separate the KUSB cable
from any coax, and I’ll report back.
David A., KC0XT
On Aug 26, 2015, at 2:46 PM, Jack Brindle jackbrin...@me.com
mailto:jackbrin...@me.com wrote:
I do. No problems here from development through current use, and I put it
through
switched by the KRC2.
Jack Brindle, W6FB
> On Sep 7, 2015, at 5:40 PM, Jim Miller <j...@jtmiller.com> wrote:
>
> Thanks all. The 200v tolerance will handle the minimal energy produced by
> the reed relay field collapsing.
>
> 73
>
> jim ab3cv
>
>
>
> O
, but there are still tweaks
occurring with each subsequent release as problems are uncovered.
Jack Brindle, W6FB
> On Sep 7, 2015, at 3:40 PM, David Ahrendts <davidahren...@me.com> wrote:
>
> Many thanks for the half-dozen direct responses off list. Most of you run a
> powered US
them for yourself
with
the SWR / power formulas available in the ARRL handbook.
So the short answer is that the SWR value for fault depends entirely on how much
power you are getting from the amplifier.
Jack Brindle, W6FB
> On Sep 13, 2015, at 11:44 AM, Byron Peebles <n...@arrl.net&
No. The KPA500 never used RS-232 to connect to the K3 or K3S. It uses the AUX
I/O connection.
- Jack, W6FB
> On Sep 16, 2015, at 9:54 AM, ae...@carolinaheli.com wrote:
>
> Accessory plug?
>
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
>
.
73,
Jack Brindle, W6FB
Elecraft Engineering
> On Sep 19, 2015, at 10:04 AM, Mike VE3YF <m...@ve3yf.com> wrote:
>
> Hi:
>
> I hope nobody gets offended as I have also posted a message on the Elecraft
> K3 Group, but I need some help in resolving this issue. I hav
Dick is an early riser - even more amazing since it is still dark where he
lives, and will be for a bit longer.
He already has a new version in limited testing this morning, literally minutes
after the problem was reported.
If all goes well, it will see wide testing followed by release within a
me know.
Jack Brindle, W6FB
> On Dec 1, 2015, at 1:00 PM, Jerry <w...@jetbroadband.com> wrote:
>
> Good afternoon,
>
>
>
> This past weekend when working the CW contest, I noticed something that may
> have a solution to it, but I don't know where to find it.
&g
At one time the RS-232 spec did have a distance rating (probably in the RS232A
time frame, it was at least 100 feet as I recall). By the C revision, this was
replaced by cable capacitance that the driver could feed. In practice RS-232
can regularly drive several hundred feet of cable, depending
You might try configuring your computers with an alternate DNS entry. Either
4.4.4.4 or 8.8.8.8 should work.
The site is up and functional, which means that something is going on that is
close to your setup. Probably other sites
are not available to you at present either. Usually that means
. With some more info, we should be able to help
you solve this riddle.
73,
Jack Brindle, W6FB
Elecraft Engineering
> On Dec 26, 2015, at 8:33 AM, joeduerbusch <k...@arrl.net> wrote:
>
> I got a new KPA500 for Christmas. It worked fine.
> But I tried to interface it with my FLEX-63
any distribution lists (Joke, Stories or Junk)
> without my permission.
>
>
> On Sat, Dec 26, 2015 at 7:50 PM, Jack Brindle <jackbrin...@me.com
> <mailto:jackbrin...@me.com>> wrote:
> I’ll echo Cliff’s questions, and ask a few more. My reading of DDUtil says it
That would be from me… Amazingly, this was on 80 meters, and was heard all over
the bay area up into central CA. At times the “echo” was louder than the direct
signal!
There are at least two recordings from that event. Very strange, and extremely
interesting. While it was ongoing, both 40 and
The inductors in a directional coupler are not linear. The response to the
turns count is actually a squaring function, so it would be difficult to remove
turns and have the effect you want. The other problem is that the W2 firmware
has a lot of data tables that depend on the values that are
change the tap for a lower voltage to
make sure we stay within limits.
73,
Jack Brindle, W6FB
Elecraft Engineering
> On Nov 20, 2015, at 8:13 AM, Cliff Frescura <c...@cfcorp.com> wrote:
>
> Sounds like the amp is plugged into an outlet that is potentially overloaded
have adverse
affects on our ability to detect characteristics of the unit.
Changing the scaling might be interesting for your use, though. If you try it,
let us know how it works out for you.
73,
- Jack Brindle, W6FB
> On Nov 20, 2015, at 9:07 AM, Alan <n...@sonic.net> wrote:
&g
It’s not just Wayne. You would be amazed at how many Elecraft employees are
active on the bands. I would bet that you have talked with many of us on the
air without realizing it.
SSB Sweepstakes this weekend will be another opportunity. At least three or
four of us will be on the air
Thee is an issue with the cheaper solar controllers - they tend to place the
switching transistor in the ground leg, making connections difficult. For
example the Sunforce controller that Jim mentions uses an N-channel FET as its
pass transistor, in the ground lead. If you then connect the
Fred’s assessment is correct - the output power resolution below 25 watts is
pretty low. But it is still putting out power, at least to a point. There _is_
a lower limit to input power - it involves the ability of the frequency counter
to do its job. If the counter cannot get an accurate count,
This can work. But it can cause problems as well. You should add isolation in
the form of either small diodes (cathode towards K3) or small resistors (maybe
100 ohms).
The problem is that if the Arduino is left powered on when the K3 is off, the
Arduino can actually leak power into the K3
e other things in the shack driving the lines, there
> might
>Bill> be a over voltage issue for the Arduino, but I think there would also
>Bill> be issues with the K3 driver circuitry. (One drives high, one drives
>Bill> low and lots of current flows.)
>
>Bill&
I would not call CocoaModem orphaned. It is open-source, and when things break,
we (myself included) are trying to fix them.
It is not well supported, however.
And, it works pretty well under OS X 10.11.3 (El Capitan) on my Mac mini.
- Jack, W6FB
> On Jan 27, 2016, at 2:53 PM, Joe Subich,
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