Michael Meerman’s (M0MPM) amazing QSL card page is now live on RADARC.org!

After some hard work from Michael M0MPM, Tom M0LTE and our web team, we are happy to announce that there is a live QSL card viewing system for RADARC (M0AAA,MX0AAA,G3ULT, G3AKF, M4T,M0EEE).

There is a vast amount of cards to see and one can search, browse or just sit back and watch as a slide show.

Click below

https://qsl.radarc.org/RADARC

Thanks again to all involved.

73

Simon M0ZSU, RADARC

Antennas evening 14th June, 50MHz UKAC

Folks,

We meet again this Thursday 14th June.

Venue: Reading Rugby Football Club, Holme Park/Sonning La, Sonning, Reading RG4 6ST 7pm til late.

This time we’ll have a go at the 50 MHz UK Activity contest. Aim will be to introduce people to contesting. It runs from 8pm to 10:30pm BST. There’s also a 50 MHz FM contest from 7pm to 8pm before that for the really keen. I for one would be at least interested in giving some points away in that.

We will also try and do a bit of an RF site survey at RRFC just to get
an idea of how noisy/quiet it is. So I’ll bring up some SDR kit
(software defined radio) of some sort – probably an airspy and SDR
Sharp.

We will have some sort of HF station also. I think Wally wants to
experiment with a 20m/40m cross dipole. Not sure what he did to upset it.

I’ve not run this by the committee yet but we might have a look into why the cheapie icom club rig we have is deaf as we established last time. It’s not much use as a rig at the moment so we might as well learn something from it. I’m thinking for those who wonder “what’s in the box” it might prove of passing interest.

As ever feel free to bring along anything you feel may be of interest.

Looking forward to seeing you there.

We will adapt activities (QSY the bar most likely) if the weather is not clement.

Refreshments provided by the bar!

73

John
G4RDC

Podcast about Understanding Receiver Specifications

Thought the following Podcast might be interesting to members:

https://www.hamradioworkbench.com/podcast/understanding-hf-receiver-specifications

Eric Swartz WA6HHQ, co-founder of Elecraft, joins us to guide our understanding of RF receiver performance specifications. Eric introduces us to common receiver specs such as Sensitivity, Noise Floor, Dynamic Range, Intermod Dynamic Range, Phase Noise, and RMDR. He tells us what they mean in real-world receiver performance terms, how they are tested, and whether it’s better to have a higher or lower number in each one. It’s also the final episode before the 2018 Hamvention and George and Jeremy share our plans for our Booth, special offers, and exclusives for show listeners who stop by booth 3104 in Xenia.

David M0DHO

Meeting Thursday 24th May Reading Rugby Football Club – informal evening

Next meeting is 24th May at Reading Rugby Football Club, Sonning Lane, RG4 6ST. Plan is to enjoy a beer/beverage, some sunshine, a bit of radio and have a natter. Hopefully the weather will be kind, Though the forecast could be better…

We’ll try to put on a simple HF station and maybe some 6m/4m/2m VHF. Should be a good opportunity newcomers to experience setting up a station.

Would be interesting if we can start to judge what the site is like RF
wise. At VHF it should be quite good as it’s not too far from where the old BK repeater used to be at Shepherd’s Hill.

By all means bring along any kit you’d like to play with. Just remember to keep an eye on it as it is a public space, try not to irradiate passers by etc.

Also be aware of high field strengths near antennas damaging kit – very unlikely anything would get damaged but something to keep in mind.

Check out FT8 on 6 metres for Es activity

I’m seeing tons of Sporadic ‘E’ activity (Es) on FT8 digi mode on 6. Running wsjtx. 50.313MHz.

Would be interested if anyone sees a double-hop – or further – as per Chris Deacon’s talk. Paths open to Finland this morning so maybe the JA path will open up.

Also how it compares to 10m, 4m, 2m. Haven’t seen any FT8 on 4m.

https://physics.princeton.edu/pulsar/k1jt/wsjtx.html

What’s interesting is WSPR seems dead on 6 but FT8 is hopping.

Ant is slim jim strung from a tree; motorola mc micro + 21.4MHz IF  tap into a funcube dongle. wsjtx-1.9.0-rc3 on Ubuntu Linux 17.4 on Dell M4400 2.8MHz Core2 laptop. Rx only. For now…

Very strong signals so Ian NXJ won’t be getting much sleep in the shack. With those sort of signal strengths, FM 51.51MHz calling will open up.

10th May meeting – what would you like to hear about/do?

Our speaker is being called away for a meeting with “UK Space Agency” on Thursday and sounds extremely busy.

This presents us with an opportunity.

So.

We will still meet at Woodford Park, Woodley, 8pm, 10th May as usual.

If you have a burning desire to talk about/share something, please let
me know! It doesn’t have to be a full on polished presentation. If fact
I’d prefer exactly the opposite this time round.

Baldrick has a few cunning plans. However, yours are most likely better.

So here’s my turnip:

* (All) brief discussion about the future of the club – get
feedback/ideas from you. eg. Maybe dial back talks a bit and dial up
more practical stuff? 10-15 minutes tops. Springboard for discussions
over a pint at the rugby club, perhaps.

Then break up, have tea etc and as parallel activities:

* short FT8 digimode demo
I realise computers and radio may not be everyone’s cup of tea but
having got FT8 going in Rx mode on 50 MHz I can see it’s huge potential.

* program up the club DMR handheld

* learn to use the Marconi 2955 test set we acquired from G8ZWN

* Zello https://zello.com/ demo – PTT on mobile telephones thingy;
network radios

* “gardener’s question time” type q&a for 5 minutes?

* ???? let me know!

This is literally just off the top of my head.

I will keep the website up to date as the evening shapes up.

73

John
G4RDC

meeting 26th April “UK Six Metre Group – the magic band” by Chris Deacon G4IFX

Chris Deacon G4IFX of the UK Six Metre Group (UKSMG) will be with us for
all things 50MHz including how to work Dx on 6 and how best to take
advantage of the forthcoming Sporadic ‘E’ Season. We hope!

Venue: Woodford Park, Woodley, 8pm as usual, Thursday 26th April.

For me, it’s a fascinating band sharing properties of HF and VHF. It’s
also fun waking Ian G8NXJ up by putting a call out on 51.51MHz FM when
he’s having a nap in the shack.

For full license holders, you do have to be a bit careful with that as
we are only secondary users in the ‘top end’ of the band (51MHz-52MHz)
and limited to 100W rather than the ‘usual’ 400W. For me, 5W from Earley
is usually enough to wake him. Also repeaters GB3AM (50.84/77Hz) and
GB3FX (50.81/82.5Hz).

Talk suitable for all levels of expertise. Newcomers most welcome.

http://www.uksmg.org/landing.php is the UK Six Metre Group website so
you can get your questions ready beforehand.

Coffee, tea and biscuits will be in plentiful supply.

73

John
G4RDC

meeting 12th April “Radios and systems used by the Soviet Reconnaissance Forces and Spetsnaz forces in the Cold War” by Tony Helm G4BCX

Folks,

On Thursday 12th we welcome Tony Helm G4BCX back to Woodford Park Sports Centre, 8pm to deliver a talk entitled “Radios and systems used by the Soviet Reconnaissance Forces and Spetsnaz forces in the Cold War”.

He is very much looking forward to this and enjoys RADARC company.

Tony’s special interests are around former eastern bloc countries and
their modern military/political history. He as traveled extensively
there and collected many tons of radios on the way. A few hundred
weight, at least, of those will be with us on the evening. So Tony will
need a hand getting set up. It goes without saying, Tony is an authority on military radio and an engaging speaker.

The talk content will be:-

1. How SOE and the Germans listening to them operated in WW2
2. The pitfalls for both sides in doing the job.
3. How the Soviet Russian Army got round some of the problems.
4. Burst morse and how it was developed by both sides.

Tony says “Please note that I will be only talking history up to the end
of the Cold War.”

Informally, I am sure Tony would be willing to give a view on very
recent events in Salisbury.

Refreshments to be served as usual.

73

John
G4RDC

Exercise Blue Ham – this weekend

As happens every so often, this weekend the Royal Air Force Air Cadets will be organising and running a military style national radio exercise named ‘Exercise Blue Ham’. The Cadets invite all amateur radio operators to take part, making this the biggest radio exercise that the Cadets are involved in.

The exercise will take place on the MOD 5MHz (60 Metre) band and a significant part of the exercise will be on the section of the band that amateurs are authorised to use.

Locally, at least Woodley Air Cadets are taking part and will be active 9.30am to 2pm Sunday- I know they would appreciate good strong local signals since they live under a blanket of S9 noise.

Some important notes if you’re interested:

This exercise does not give amateur stations permission to operate outside of their normal licensing conditions.

– the allocation is not continuous- refer to http://rsgb.org/main/operating/band-plans/hf/5mhz/ for full details if necessary

– the allocation is for full licencees only

– maximum PEP 100W and 200W EIRP

– max antenna height 20m AGL

– secondary allocation, no interference to MoD stations

A summary of suggested spot frequencies in the 60m amateur allocation follows:

5278.5kHz USB

5298.5kHz USB

5301kHz USB

5304kHz USB

5317kHz AM

5320kHz USB

5335kHz USB

5354kHz USB

5363kHz USB

5379kHz USB

5395kHz USB

5398.5kHz USB

5403.5kHz USB

Note upper side band, against convention.

Selecting a USB frequency from the list above will ensure compliance and is largely compatible with allocations in other countries. Please do not transmit USB on 5330.5kHz, 5357kHz, or 5360kHz.

Various Cadet stations will be operating on each of the days, mainly from 08:00 to 20:00, but could also be outside these times, and will be on various frequencies within the band. Where possible stations will advertise which frequency they are listening on live on this website as the exercise is in progress and amateurs are welcome to check this page and call in on the advertised frequencies.

Cadet stations will call ‘Alpha Charlie’ which is the equivalent of CQ, and amateur stations are welcome to reply. Exercise Callsigns will all be in the range MRE01 up to MRE98 although other MR, MF and MA prefixed callsigns may be taking part.

The information exchange to score the contact will be

Your Callsign,

Signal Report,

Antenna Type,

Transmitter Power

Your Location. 6 Digit Maidenhead. Need not be precise.

As Cadet stations change frequency contacting them again on a different frequency will score as an additional contact, as these frequency changes they will be reported on the exercise website where possible.

The contacts will be plotted almost live on the exercise web server.

The ACO will issue certificates for amateur stations that contact 10 or more Cadet stations during the period of operation using your callsign contact details on QRZ.com. Contact with the same station on different days count as separate contacts. Email your callsign and contact details to claim a PDF Certificate to: [email protected]

The ACO looks forward to operating as many amateurs as they can during the period of the exercise and it will give their young operators an ideal opportunity to utilise their radio operating training on HF equipment to a different audience.

Once a contact is logged into the system it shows up onto a map which can be accessed at http://alphacharlie.org.uk/blueham/showmap.php

Thank you in advance from the Cadets for taking part and giving the operators plenty of ‘Air time’ which cements their radio training that they have received.

Website for the Reading And District Amateur Radio Club