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FT-60R Battery Pack
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WSPRView for Windows
Forum: Digital Modes
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06-12-2023, 09:15 AM
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6m & 2m WSPR Challenge fo...
Forum: Digital Modes
Last Post: VK2KRR
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FK8SUX beacon. :)
Forum: 50MHz
Last Post: VK4ADC
02-12-2023, 07:09 AM
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Easy BitX build - RF prob...
Forum: Homebrew
Last Post: VK5PJ
01-12-2023, 04:33 PM
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ADS-B Receivers needed - ...
Forum: Computer related
Last Post: VK1JA
29-11-2023, 06:57 PM
» Replies: 2
» Views: 183
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ACMA Update to Amateur Li...
Forum: Regulatory, Licencing & Exams
Last Post: VK2ZRH/4
28-11-2023, 02:16 PM
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Amateur Radio magazine - ...
Forum: W.I.A. / ITU / IARU
Last Post: VK2ZRH/4
27-11-2023, 11:22 AM
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Someone in SEQld with an ...
Forum: Wanted
Last Post: VK4ADC
20-11-2023, 03:25 PM
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» Views: 136
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Microwave display - Balla...
Forum: Club Activities, Hamfests, Gippstech
Last Post: VK3BA
19-11-2023, 07:35 PM
» Replies: 2
» Views: 208
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| Easy BitX build - RF probe |
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Posted by: VK3UVW - 29-11-2023, 10:26 PM - Forum: Homebrew
- Replies (4)
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Hi there,
I'm building a kit, the 'easy bitx' from inkits. Been a bit of a slog, but almost there!
At one point it requires an RF probe be used to test signal on the pcb. I did find a howto but the ascii schematic is a bit unclear.
A) Am I right in thinking there's a capacitor (C1) at the tip, a diode(D1) to ground, then a 1M resistor (R1), then another capacitor(C2) to ground, with measurement taken across C2?
B) Is measurement just with a standard digital multimeter ok? Or is a moving coil type the only real solution?
C) Is there any advantage to this method over just probing with an oscilloscope or spectrum analyser (I have both)
D) Is impedance of the RF probe a concern at all?
E) Does the voltage output depend on the rf probe construction / component selection?
F) Lastly, does the paragraph
"While doing this test you would see that the meter needle if analogue meter is used and some voltage show’s up to a certain level, this is the carrier from the balance modulator which has to be made zero or null. To null the carrier press PTT with RF probe connected adjust RV2 100 ohms in balance modulator till the meter needle comes down to zero, adjust the 22pf trimmer too. So when you modulate now you want see any movement in meter apart from a ticking of 67 meter, so when you modulate now the meter will move and come back to zero when no modulation is done"
make much sense? (Taken from page 66 of the build instructions). I know where RV2 is on the board; not entirely sure how the balance modulator works but my vague understanding is that it suppresses the carrier so only the LSB/USB are present (Thanks, google). I guess my main question is what the 67 meter is; and is "modulation" in this sense just transmitting?
I'm building this thing because I want to learn, and it's been a success on that front, but now I'm at the pointy end of making it actually work...
Thanks for reading,
Scott
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| ACMA Update to Amateur Licensing arrangements |
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Posted by: VK2ZRH/4 - 28-11-2023, 10:00 AM - Forum: Regulatory, Licencing & Exams
- Replies (1)
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By email from ACMA
28 November 2023
https://acma.createsend1.com/t/d-e-vhhtduk-l-r/
Status of new amateur radio arrangements and transition with AMC
As indicated in our August 2023 update, we plan to make the amateur
class licence in December. We will commence class licensing arrangements
in February, at the same time as the commencement of the proposed new
amateur radio qualification framework and new assessor accreditations.
In the August update, we indicated that more details about the
transition arrangements for existing amateur licensees, including
amateur radio clubs, will be published in December 2023. This will
include information on the surrender of amateur licences and eligibility
for a pro-rata refund of the tax paid.
We have considered the submissions we received in response to our consultation on the proposed amateur radio qualification and assessor accreditation arrangements. We plan to publish the submissions and our response to them, as well as the outcome of the consultation by mid-December.
[that link does not work - VK2ZRH]
Before the amateur class licence commences, we will write to all
current non-assigned amateur licensees to outline the transition
arrangements. In this letter, we will confirm the qualification level
and call sign(s) they hold, and that they are authorised to operate
under the amateur class licence.
The ACMA has been working closely with the AMC to support a smooth
transition of qualification and call sign services – which the ACMA will
administer from February 2024 – and continuity of service for the
network of assessors.
Details of AMC cut-off times are outlined on the AMC’s website.
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| ADS-B Receivers needed - AirScout Aircraft Scatter Software |
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Posted by: VK1JA - 25-11-2023, 04:36 PM - Forum: Computer related
- Replies (2)
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Hi All,
Apologies as this will be posted across multiple groups.
Users of AirScout, the software that calculates the angle/line between two stations to enable a contacts to be made via AE enhancement, would have noticed that the plane feed information has not been working for a few weeks now due to the sites that the software was gathering the ADS-B data from, either no longer working or have closed off access to the data.
We may have a solution to have AirScout working for all VK Amateurs again!
As noted on the AirScout news page (http://airscout.eu/index.php/news), Thomas, OV3T is providing a server (and backup server) for gathering ADS-B data from volunteer receivers and then distributing the data for users of the AirScout software via a plugin and/or manual feed line. This has been very successful in Europe - details at http://airscatter.dk/index.php/how-it-works/
This has been so successful in Europe that Thomas now provides this as a free service (but donations are welcome to ensure the service continues).
I've emailed Thomas and asked if it would be possible to provide the same service for Australian Amateurs, and the good news is yes, it should be no problems.
BUT, we need ADS-B data. If you have a ADS-B receiver currently up and working it could be as simple as feeding the data to Thomas' server. My understanding is that you can still feed your data to where ever you're currently feeding it to, but you can also send it to Thomas' server to help get AirScout working in Australia again.
Once enough data from Australia is sent to Thomas, Thomas' servers will be able to provide coverage.
Thomas is happy to liaise directly with people willing to share their ADS-B data for setup etc. Thomas's email address is ov3t@ov3t.dk Please keep us informed as how you progress.
73
Jayson
VK1JA
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| FK8SUX beacon. :) |
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Posted by: ZL2WHO - 19-11-2023, 02:13 PM - Forum: 50MHz
- Replies (5)
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I have been asked to help out with a new beacon for New Caledonia. When I built 50.024 I built 2x, and to date I haven't needed the spare so im willing to donate to the cause.
Many years ago I came across a rock.. 50.080, thought to myself that might come in handy one day ! What are the chances of that.
So the beacon is all run up on freq, rock seems happy in its new oven environment. Max power out is set to 30w, its final is a 2N5643 rated to 40W so 30 is a doddle.
Ok cut to the chase, why am I here ? well im glad you asked.
The Keyer is a ham gadgets IDoMatic 2 and for what ever reason I cant connect. Conversing with ham gadget man he bluntly said buy the new one, so he clearly has no idea.
Can anyone help me with getting this thing to connect ? as soon as the ident has changed I can get it away.
Original Putty version that last worked was 0.62, I have downloaded the latest 0.79 but same result.
Im considering buying a Arduino Nano and programing, so if this is happens id like to get someone to write some code if ness as my skills are somewhat limited.
Cheers,
Mark
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| Solar Regulators and Inverters To Avoid |
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Posted by: VK3ZAZ - 16-11-2023, 03:01 PM - Forum: EMC, Interference
- Replies (2)
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Renogy and Rego Multipoint Tracking.
Kings MPPT aka other names. Evert etc. spurs all over 2M bsnd and opens mute on multiple fm channels.
Victron MPPT series. White crackles on six,
Any cheap Chinese.
Qrm on 28 -50-144
Rego inverters. Crap on hf unless you filter it with major surgery.
What works
Redarc pwm
Morning star TriStar pwm ts-60.
Imam told mppt does but unproven.
Save yourself some $
Victron. Noisy on six
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| Microwave display - Ballarat Amateur Radio Group Hamvention - Sunday 4th Feb 2024 |
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Posted by: VK3BA - 15-11-2023, 08:05 PM - Forum: Club Activities, Hamfests, Gippstech
- Replies (2)
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G’day to all VK3 Microwavers...
On Sunday the 4th of February 2024 will be the annual Ballarat Amateur Radio Group Hamvention… BARG Hamvention
With the help of others, I’m planning on setting up a promotional display of microwave gear for attendees to see with the intent of attracting more people to microwave radio operations. Yes, there is life beyond 10metres. I’ll also be promoting the VK3RBA linked network… VK3RBA QRZ page as well as Amateur Radio Victoria who maintain many of the repeaters around Victoria… Amateur Radio Victoria
I’ve already received offers of assistance from a few BARG members and Amateur Radio Victoria are committed to assist. I’m waiting to hear back from a manufacturer from Japan to see if they’re interested in being involved as well.
I’ve booked two tables worth of space and if anyone was interested in bringing along and displaying their microwave gear, including antennas, to bring them along to display. It would be great if you could also print out an A4 sized sign on who’s it is and what it is and attach it to your equipment. I’ve booked a GPO for the stand, therefore if you wish to power up your gear, bring along a small power supply and plug it in. The display area will predominantly taped off so that hands-on access will be restricted, but close enough to enable attendees to see the equipment, method of construction, etc and maybe gather some clues & ideas of how to go about it and where to get the bits to build a system. The display will be supervised at all times. There may also be an opportunity to do some live testing from a test station outside to a couple of systems inside the building, including a test ATV broadcast link.
None of the displayed gear will be for sale – it is purely to help promote microwave radio and attract some more people to get involved – more contacts for the rest of us.
So if you’re interested in bringing some gear along to show and encourage others, let me know so that I can plan the display.
Cheers,
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| How to extract date range from wsjt adi |
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Posted by: VK6RO - 14-11-2023, 06:20 PM - Forum: General Discussion
- Replies (2)
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Question
How do i extract a certain date range from a ft8 adif file.
Is there a real easy way to extract say 30 contacts from the date range in sequential order E.G november 7 to nov 11
I have no idea about this stuff really
I use paper logbooks for all except ft8 etc with JTDX which used to upload automatically to EQSL
JTDX does not seen to be uploading to EQSL very day? even though the box is ticked in the reporting tab.
I am an expert on some things but not this sort of stuff.
tnx
graham vk6ro
e&oe
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| Someone in SEQld with an EPROM programmer ? |
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Posted by: VK4ADC - 14-11-2023, 03:34 PM - Forum: Wanted
- Replies (1)
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I have to copy 4 x 2732 EPROMs - I suspect that one in my Marconi Sig Gen is temperature sensitive - to alternative devices, probably 2732 but alternatively 2764, 27128, 27256 or 27512 class chips.
Note that the destination is probably the 27C series where the original is a straight 2732 chip.
As I have discovered by a search through my many "bits" boxes, I already have the chips and the UV eraser, just need the programmer - mine was outmoded many years ago when the ISA bus disappeared from computers..
Three alternatives :
Borrow to copy them
Visit to copy them (if in SE Qld)
Buy it if the price is right.. and no longer required by the existing owner.
If you can assist in one form or another, please respond.
Thanks
Doug
eg GQ-4X Version 4 True USB Programmer ???
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| VK5AKJ |
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Posted by: VK3ZAZ - 14-11-2023, 06:53 AM - Forum: Silent Keys
- No Replies
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Reported by SERG the passing of Ron VK5AKJ.
See serg website for details.
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