09/08/2025

ON7DQ Teeth Key for SKCC Weekend Sprint


As a member of the SKCC, I try to be active each month for the "WES", the SKCC Weekend Sprint.
Weekends are often busy with other activities or family visits, but I always try to get at least a few contacts in the log.

What is the Weekend Sprint ? From the SKCC website:

The SKCC WES aims to bring together operators with different skill levels in a regularly scheduled, informal operating event lasting 36 hours. The event starts at 1200 UTC on the 2nd Saturday of each month and ends at 2359 UTC on Sunday. Participants can operate for the full 36 hours.

Of course, all contacts are made with a mechanical key, be it a Straight Key, Bug or Sideswiper (Cootie).

The August edition favours the use of a home built key, giving 5 bonus points for each QSO made with that key. So I had to think of a new key ...

After building a few Cootie designs in the past, I decided to build a new straight key, using my own teeth !

My own teeth, huh ?
Well ,not my actual teeth, but a 3D printed replica I got from my dentist. It was made at the occasion of a dental implant a few years ago.

I did have a varnished plank, that was a first test object when I aquired a router some time ago.

[ Sidenote: I used the router to make a Christmas decoration with 3 LED candles that used 3 AAA batteries EACH. I got rid of all the batteries by connecting all three candles to a 5V adapter, or it can also work on a powerbank. This was the result: ]


Now, how to make a straight key with that set of teeth. I took a few pieces of wood in my garage and started tinkering ... this is the result:




Two bolts (through top and bottom) touching each other do the keying. The spacing is adjustable with the top bolt. Keying force can be adjusted by removing some wood from the top plank, but I think it's just right as it is now. 
The teeth were simply glued to top and bottom with hot melt glue.

No springs attached !



A groove in the bottom houses the wires,  and the wire is fixed with two rubber pads, pressed into the groove.


01/07/2025

ON7DQ Friedrichshafen 2025 - Day 10

 

DM/RP-411, Hohe Derst - 561m, 4 points




FL/VO-166, Stromberg - 314m, 1 point






Continue reading ... go to DAY 11

or

Go back to overview HERE

30/06/2025

ON7DQ Friedrichshafen 2025 - Day 9

 

DM/BW-064, Heersberg - 964m, 10 points




DM/BW-147, Gespaltener Fels - 1000m, 10 points 






DM/BW-054, Hohloh - 984m, 10 points



Continue reading on DAY 10

or

Go back to overview HERE

29/06/2025

ON7DQ Friedrichshafen 2025 - Day 8


DM/BW-348, Gehrenberg - 754m, 8 Points

2 MG











 Continue reading on DAY 9

or

Go back to overview HERE

28/06/2025

27/06/2025

ON7DQ Friedrichshafen 2025 - Day 6

POTA DA-0156 Riedlepark Park 









DM/BW-854, Höchsten - 838m, 8 Points












The SOTA Dinner













Continue reading on DAY 7

or

Go back to overview HERE


26/06/2025

ON7DQ Friedrichshafen 2025 - Day 5

This day, I drove from Eschbach near Freiburg to Friedrichshafen, where I had booked an AirBnb apartment for 4 nights. I left at 08:30 local time, the temperature was already 25°C.
Along the road, I had planned three summits.


DM/BW-233, Buchberg - 880m, 10 points


 

Parking spot is here : 47.835652, 8.530815 , at the Friedhof Blumberg.

Right across the road starts a shortcut through the grass (yellow line), or you can just walk the Pommernweg (red line),  it doesn't make a big difference.


I wanted to follow the track by Markus, HB9BRJ from SOTL.as, but I must have been sleeping ... I missed the right turn to the Eichlerweg. So in the end I walked more than needed, but following the Buchbergweg made it less steep. I returned via the Eichlerweg.
In case you want to avoid my mistake, this is where you should go up the steeper Eichlerweg, note the three "steps".


Anyway, I made it to the summit, at the Buchberghütte, and got this nice view as a reward.


I set up my station at the picnic bench, and had a nice activation.
30 QSO's and 5 S2S made me a happy activator.



DM/BW-235, Hoher Randen - 930m, 10 points



Again, it was around noon when I arrived at my second summit, so time for lunch ... lucky that there was a nice bench in the hut at the parking spot, position 47.791913, 8.557019



Can you tell it was again getting hot that day ?



After lunch, it was a 10 minute walk to a nice spot in the activation zone. I didn't walk to the actual summit, but followed the track and advice by Markus, HB9DIZ.
Near another hut are a number of beehives, but I wasn't bothered by any bees, it must have been too hot for them as well ... hi.



The bench where I set up was in the shade when I started the activation, but after a while it became completely sunlit, so I was lucky that I brought an umbrella ... and my extra fans !



I had 19 QSO's in the log, no S2S but 1 P2P for POTA.



DM/BW-359, Stöckenloch - 698m, 6 points


Finding the road to this summit may be a bit tricky. First you have to drive to this position 47.787370, 9.013911, along the Dettelbachstrasse. There you will see a sign to the Bisonstube. Follow the forest road all the way until you see the Bisonstube, where you can park, position 47.790349, 9.029421
You can see a few bisons in the picture above.

There was a slight drizzle when I arrived, so I wanted to wait a little until it passed.
While I was making some notes in my travel logbook, someone came knocking on my window.
It was Ingo, DH5ST ! He had also just arrived to activate this summit, on his way to Friedrichshafen.
I knew Ingo from the lecture he gave at the SOTA meeting in 2022.
While we decided to activate or not, I forgot to take a "selfie" with Ingo, but you can find a picture of him somewhere in this report).

The drizzle faded away and we started walking to the sumit. We split up, and agreed to use different HF bands to avoid mutual interference. I found a nice spot in the activation zone. I had taken an umbrella but the rain had stopped completely, so no need to use it.


Because I wanted to stick to my schedule, I made it a short activation with only 5 QSO's, but 2 of those were S2S. When walking back, I looked if I could spot Ingo, but I couldn't see him. He was probably somewhere near the arrow in the picture, hi.






The final part of the road goes along the Bodensee, using the B31 road.
It gives some nice views of the Bodensee, but goes through many holiday resorts (Erholungsort), where speed is limited to 30 km/h. So a slow and long drive resulted ... arriving in Friedrichshafen at 18:00 local time. It had been a long day ...

Continue reading ... go to DAY 6

or

Go back to overview HERE