Remote Rig Access and CW

I have been using my K2 Station remotely, via Internet, for several months now. It works great but I really want to be able to use my keyer instead of a keyboard for CW. I have seen several people talk about doing this, but have not yet seen anyone actually do it. I know some of the pricey commercial remote-rig solutions can support this, but they are too pricey for me.

My approach will be to use an Arduino board on each end of the remote link. There is an Ethernet shield available for the Arduino Mega board. I am getting a pair or these, and am starting to look at the software. The trick will to be send timing information over the link. Character and spacing time precision will be handled by the Arduino at the Station end.

IC-7600 After a few months

I have now been using the IC-7600 for about 5 months. It has not been used heavily the entire time, but I have used it hard during several contests. Overall I am very impressed. The menus are very intuitive, rarely causing me to “RTFM.” The display is as good as any I have ever seen on a radio, and was one of the main selling points for me.

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The ability to work RTTY and PSK-31 with just the addition of a Keyboard is outstanding. I have not used those modes heavily, but the built-in decoder and spectrum displays are great (although a bit small).

CW is a real joy with the flexibility of the digital filters. They are easy to customize. I also really like having the manual adjustments for the filter skirts (high/low cut), and the audio peak filter. These are features I have on my old Kenwood TS-930s and really missed on the K2, which I still enjoy using for CW work.

I am not a heavy SSB operator, but I have started making a few more contacts recently. Icom did a great job with the hand mic included with the rig. I figured it would be a piece of junk, but it matches up so well with the equalizer settings that I have had several unsolicited compliments on the audio quality. I also use a cheap Yamaha CM-500 headset in contests, and that also seems to work well.

The IC-7000 now lives permanently in my vehicle, where it belongs (and does a great job).

VA QSO Party 2012

Had a great time working the annual VA QSO party. This year I spent half my time from my fixed location in Lancaster county (LAN). Then I went mobile to attempt to provide contacts from several hard-to-find Counties in the Northern Neck and Middle Peninsula regions of Virginia.
The mobile operation included about 10 Counties and 200 miles of driving. Some of the Counties were Essex, Richmond, Middlesex, King and Queen, and Westmoreland. Our FARA club score looks great this year. Hopefully we won several categories as we did last year. But in any event, many of our Club members enjoyed operating VAQP, one of the best State QSO Parties in the US every year.

ICOM IC-7000 CI-V with WINDOWS 7

Had real trouble installing the USB CI-V interface for my IC-7000 on a WINDOWS 7 machine. Internet tells me everyone has this problem. The driver that Prolific makes available simply does not work. I tried the usual WINDOWS driver install process (install, uninstall, reinstall, uninstall, try various “compatability” settings which nobody understands), but no luck.

After many attempts, I finally loaded the VISTA version of the driver. It appears to have loaded. Why didn’t I think of this before?? Of course – load a version that is not intended for your operating system. I should know if this actually worked tomorrow when I try to talk to the radio.  Expectations are low.

Remote Rig Access Latency Greatly Improved

I was operating my remote-access Elecraft K2 last week in a short Contest. In the past, I had to wait as much as 1-3 seconds for a single up/down change in operating frequency on Ham Radio Deluxe. This night,  it suddenly became very responsive. I no longer wait, in fact I can now make very quick changes. With this improvement in response, the remote station is now really a joy to operate. I have also used N1MM to make a number of CW Contacts in some contests.

I believe the reason for the sudden tuning-latency improvement is recent version updates in TeamViewer and/or Ham Radio Deluxe.

K2 PTT-line is Tied to Key Line – AGAIN!

As I found out before, the Elecraft K2 uses the same signal line for PTT input and for one of the Key lines (dit I think). This is a royal pain when integrating into a more complex arrangement such as a computer controlled station, or an SO2R contest station. In these configurations, you are likely to be using interface devices to drive the PTT line, and not a Microphone. I am using my K2 for both remote-control and SO2R contesting,  so I had to find a way to easily handle this problem.

When operating SSB only, this is no problem and can be ignored. If you are just connecting a Mic and a Key, it is also not a problem. The issue is when you connect interfaces and want the computer to provide the Mic audio, PTT input, and CW keying. When switching between modes you can disconnect the Mic connector any time you want to use CW. Of course this is a nuisance and puts undue strain on the Mic connector.

I am using N1MM contesting software with the parallel port (LPT1) providing the CW and PTT lines. What I discovered is that you can Configure the LPT1 port to control only the “other radio” and the PTT line no longer activates. So if I have the K2 as radio #1, I use the Config Tab in N1MM, assign LPT1 to radio #2, and the problem is solved. Of course I have to change it back when I change to SSB mode, but at least it is quick and does not involve hardware.

Finally on-the-air with Remote Station

After working on configuring my Elecraft K2 for remote operation. I am finally on-the-air. I had been using it in receive-only mode while I completed a “dead-man” timer, that would shutdown the transmitter if I ever lose my Internet connection while in transmit mode. This is required by the FCC.

It turns out, that remote use is another reason that it is good to build the K2 in one chassis and the 100 watt amp in another. It is perfectly safe to disconnect the power to the base (QRP) K2 with a timer. This avoids the need to interrupt the high-current connection to the 100 watt amp. I was assured that this is safe by Elecraft guru Don, W3FPR. If you ever ask a techical question (especially troubleshooting), Don is likely to give you the answer. Here is what he had to say about this (posted with permission – thanks Don):

Yes, it is sufficient to kill the power to the base K2 (when the KPA100 is mounted remotely).  Unlike the K3, there is little to be lost (bits mixed up) if you turn the power source off for the K2 during normal operation.

——— And he went on to say in another message ——-

If the base K2 and the KPA100 are mounted in the same box, then the situation is different – you would have to interrupt the higher current connection (to the KPA100) if everything were connected normally.
Now, there “is a way” — if you do not connect the AUX 12V connector from the KPA100 to the base K2,  the base K2 will not be powered by the KPA100 power supply connection – you will have to power the base K2 from the coaxial connector.  That makes the power off conditions the same as with the remotely mounted KPA100.

IC-7600 Antenna Tuner Testing

I did a bit of testing with 2 wire antennas this weekend. Here is a summary of the results, which I also posted to the IC-7600 e-mail reflector:

The antennas:
1 – A “long” 80m Dipole, ladder line, 4:1 balun, then a long coax run
to the rig
2 – A fan dipole with 80/40/20 meter elements (these are close-spaced
elements, with 80m and 40m using opposing legs of a single piece of
300-ohm twinlead), 1:1 balun, then a long coax run to the rig

This was a brief test. I tried only 10/15/20/40/80 meters, and tested
only a few frequencies on each band, including something close to the
bottom and top of each band.

The IC-7600 internal tuner was able to tune both antennas over most of
the 10/15/20/40/80 meter bands with the following exceptions:
1 – Could not match the 80m Long Dipole at the high end of 80m or
anywhere on 40 meters
2 – Could not match the Fan Dipole anywhere on 20 meters

The External LDG-100 PROII was able to match all the test frequencies.
The IC-7600 tuner is very good, and tuned most of the frequencies,
including some that appeared to be worse than 3:1 SWR (the stated
spec) on my antenna analyzer.

Please note – I am NOT knocking the internal tuner, and with a little
antenna work (pruning antennas and feedlines – not fun) I could
probably get matches everywhere I need to operate. So, while the
internal tuner is very good, the LDG (which has a nice ICOM interface)
covers a wider range. The LDG was sometimes very slow (10s of
seconds), but once a match is found it is stored and recalled quickly
next time you need it.

Icom IC-7600 Added to the Shack

I have been looking to purchase a new rig for some time and finally decided to go with the Icom IC-7600. I was torn between this rig, the Elecraft K3, and the Yaesu FT-2000 (because I can not afford the FTDX-5000). For my needs, this is the best of the three. and I will maintain my complete K2 station as my “second receiver” and for use in contests in SO2R mode.

I have had the IC-7600 for a few weeks and have had a chance to do a bit of testing. I worked a short stint on a RTTY contest, a 10-hour CW contest, and made a few SSB and PSK-31 contacts. Operating the rig has been very enjoyable so far. It just seems to be very well thought-out and the IF DSP filtering is outstanding. The built-in RTTY and PSK decoders are great. Just plug-in a USB keyboard and go.

The internal antenna tuner works great but only handles up to about 3:1 SWR. Since I have some “ugly” wire antennas, I have acquired an LDG external tuner – the AT-100 PROII. It has an Icom interface that integrates it nicely with the rig (as well as the internal tuner, in my opinion). It definitely allows me to match a broader set of antenna situations than the internal tuner (as the specs would lead you to believe).

Remote K2 Power Timeout

Finally completed the power watchdog timer for the K2. This allows me to operate the K2 remotely within compliance of the requirement to have an automated means of shutting down a transmitter if it exceeds 3 minutes on the air. This is an FCC requirement, and you definitely need to be concerned about the possibility of losing rig control during a transmission.

My approach is the use an Arduino board to monitor the PTT line from the K2. If that is active longer than the predetermined timeout period (FCC mandates not more than 3 minutes), it disconnects power to the rig.  I have the power disconnected for a minute, then restored. The K2 will not power-up in a transmit state, so the problem should be resolved.

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