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Sunday, 18 February 2018


Had these in the workshop for a while and thought was time to make then up.

Basically Butterworth band-pass filters for 80m, 40m, 30 and 17m.

Used T80-6 torroids and 500V (I think) SM caps.

Should be good to 20W at least, probably a lot more.

The 80m and 40m ones I used thin wire in the winding so probably not good for higher powers, the 30m and 17m ones used 16SWG wire should should be good for 100W

Monday, 12 February 2018

C6AKT now on clublog & LoTW

As I found out C6AKT was a reissued reciprocal SK call (Glenn W2CXX) and they had registered it through clublog and LoTW etc. So had to go through the steps needed and they are both now live again so requests for QSL will come to me.

Please make sure you realise I will not be dealing with requests for QSO or operation before my time there 8th March 2018.

"On 2018-01-13 16:31:45, Dominic Baines (M1KTA) requested that C6AKT be transferred to their account.

The allowed 28-day waiting period has now expired, and glen fadden (W2CXX) has not responded.
As a result, this Callsign Transfer Request has been automatically completed and C6AKT has been
transferred to Dominic Baines (M1KTA) as requested. The original log has been renamed C6AKT-1 and
remains under the account of glen fadden (W2CXX).

This resolution is now final, and the Callsign Transfer Request has been closed.

vy 73,
Michael G7VJR and the team at Club Log -"

Thursday, 8 February 2018

Keyers work in SO2R mode

Just tested, before going to the salt mines (sadly work still), that can use the keyers (K1EL Lite and WKUSB or K3NG) and the ATS-3B and K2 rigs independently of each other when switching manually and they are fine. In case ask/puzzled, the plan is I will using ONE manual key input through the SO2R and those will go into the 2 keyer paddle inputs. But I'll use win-test to key just ONE of the rigs the other will be manual.

Will be testing the win-test functionality and effect when change from rig1 to rig2 etc over the w/e.

Got to make sure the TX lock out works.

Wednesday, 7 February 2018

A 5th 10m travel pole goes in the bag...

And still inside weight limit :-)

The suggestions are:

4SQ try 4SQ+1 so a 5th parasitic element might help in one direction or other.

The theory is to either place it in the dead centre or inline (along the diagonal) with the required direction.

IF there is 15m or 10m activity, add a second GP.

Friday, 2 February 2018

C6AKT 100% homebrew

As asked... Will be QRP.

The C6 trip will be 100% using home brew kit.

2el on 80m, Supports are two 12m poles from Spiderbeam, with top capacity hats. Directed end-fire towards UK/EU. Wires all new.
4-square on 40m, Four 10m traveling poles from SOTABeams will support the radiators, radials all new wires from CPC. Using a TK5EP based hybrid controller, same as used elsewhere, this time M1GEO made me up a QRP PCB and much lighter so will be trying that instead of the S2JW version.
VDA on 20m, 12m pole, Tesco chopping board and parts from two 4m poles. See details how to build one. TX6G David Aslin G3WGN also has excellent designs. There is a 1/2 wavelength version out there too...
GP's 15m and 10m (Not expecting much if anything on 15m and 10m)

Feed is NEW Aircell-5 with 75ohm webpro 100 between the phased antennas.

Taking coax stubs for 40m and 20m made from coax I picked up from SM7UCZ a while back (tnx G4BWP for the conversations and corrections)
W3NGN based BPF (but qrp versions) between the TRX and antenna

I'll use an SO2R arduino controller not really for running SO2R but to switch between the antennas.

Rigs will be ATS-3B and K2
Homebrew Softrock "Lite + USB Xtall" V9.0 Si570

I do have KX3 which I 'built' but they don't really fall into the hombrew category so they stay in UK

Wednesday, 31 January 2018

M1KTA SO2R controller

Asked if I could share details of the SO2R controller...

It seemed impossible to find a current project for this that was being kitted and pre-made commercial kit seems way too expensive so in order to make this as small as possible (using through hole) I've put together an Arduino Uno shield. This all started based on the work from NCJ July 2010 by Paul Young, K1XM and then the SO2R box YCCC created. All from a while back and discussions with a quite a few along the way going back a bit. I looked a bit at the stuff M1DST had done too.

Design choice was this absolutely MUST only use very common through hole components, nothing unobtainium.
Everything apart from plugs and sockets HAVE to fit on an Arduino Shield.
(I did play with a MEGA one too but no idea where that is right now.)
Design choice ALL connections HAVE to be on the outer edges of the board, absolutely nothing in the middle. Those square 4 pad switches definitely got moved.

Not complete by a long way and only really a prototype and being a cynic I expect it will get ripped off somewhere which is why not posted all the details this was an early layout and it 100% was re-organised, I just plonked the basic required components on the shield board to see if fitted, no tracks. This has tracks both on top and bottom of the board.

What does it do? Well if no PC or Arduino (I added an external power option) you got the ability to MANUALLY switch between 2 rigs .... PTT, CW key, Microphone and Headphones with AF control was all be off board. Honestly nothing is rocket science!

It can work like that all manually if you do not want to do anything else, it doesn't need the Arduino and the 'plan' was build it so manually I can switch from rig1 to rig2 if the PC is not there. In my case I used to see if there is an opening etc as I'll have the 2nd rig and separate antenna all setup. Now the extra bit is I kinda followed the OTRSP protocol so it should be usable by Win-Test by sending a command but I have not tested that bit in anger.

BTW ZERO band data, as this had to be small and I don't use it anyway so you cannot use this for switching antennas or BPF/LPF/ATU etc It could be added I expect.

After a chat with Ash, 3V8SS I added an LCD instead of the LED, meant adding to the Arduino code and only works if the arduino is present and powered. The LED work in either case.

The Arduino bit, I munged the code from K1XM and 3V8SS's versions into something this will work with.

I am sure using a Nano and SMT components this could probably be made even smaller (and lighter).

The isolation of the audio components from ground might be a wise choice if you have group loop issues but not added isolation transformers at this point.

My rigs are either separately CAT controlled (or not at all like ATS-3B) with either their own keyer or either a K1EL or KD1JV Simple keyer connected so I didn't include any of those bits either.

Saturday, 20 January 2018

SO2R based on SO2Rduino

For DX trips building an SO2R controller based on the SO2Rduino from K1XM NCJ Article by Paul Young -

Got the relays and other components so putting something together to see what is possible.

Will look at using with non CAT controlled radios as well as an SDR RX input.

As move long will post info.

The relays I'll be using at 5V versions...MCB-S-205-C-M basically as have them.
Pretty sure got plenty of some 12V versions as well.

In addition (as will use an Arduino MEGA will look at including an OLED display and possibly a VSWR meter, so don't have to have an extra bit of kit on trips.

One crazy idea is to use a K2 as one TRX and as have a spare K2 enclosure build the SO2R into it, along with the second TRX and anything else might normally require on trips.

Will probably be for CW only and I'll not bother with the mike/phone switching for SSB or data modes.