Magnetic loop antennas and fundamental antenna questions – Prof. Mike Underhill G3LHZ

Folks,

At our next meeting we welcome Prof. Mike Underhill G3LHZ to tell us all about magnetic loop transmitting antennas including the latest research. He will bring a selection of loops.

Venue: Woodford Park, Woodley, 8pm as usual, Thursday 27th April.

Further, Mike will address fundamental questions about antennas in
general.

Mag loops offer interesting possibilities where space is at a premium –
a number of them we are hoping will fit in the tea room at Woodford
Park.

Also, if extreme volts and amps are your bag – this is definitely one
for you. I’m no expert (Rael is, M0RTP) but the tuning caps need to be
specially designed to handle the high voltages (often involving vacuums) and the loops themselves need low resistance.

Tuning of said caps offers challenges for micro controller/computer auto tuning so there’s something for Arduino/Raspberry Pi enthusiasts etc. – indeed Rael has done quite a bit of work here.

Refreshments to be served as usual.

Looking forward to seeing you on Thursday.

Many thanks to Rael, our own mag loop exponent, for helping organise this meeting.

cheers

John
G4RDC

Digital Voice Modes from a User Perspective, Tim Kirby G4VXE

 Folks,

Next RADARC meeting is on Thursday 13th April  when Tim Kirby
G4VXE joins us again to look at the DMR, DSTAR and Yaesu Fusion digital voice modes from a user perspective.

Venue is Woodford Park as usual, 8pm.

Please feel free to bring along your digital voice mode hand held
equipment. Or larger if you wish. I’d be particularly impressed with
thermionic equipment (perhaps in the shape of a linear??).

If anyone has PC programming stuff they could demo that would also be good. I keep hearing about ‘codeplugs’ and it would be great to see one in all it’s 3 pin glory 🙂 Though I suspect you wouldn’t want to
connect it to the mains.

On the software side, if anyone has DSD working on a PC/tablet it’d be great to see that too.

Digital Speech Decoder

SharkRF openSPOT also looks interesting
https://www.sharkrf.com/products/openspot/ – thanks PW for pointing that one out 🙂

Refreshments to be served as usual.

A huge thankyou to Tim for supporting us.

Look forward to seeing you there.

cheers

John
G4RDC