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Search Results
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Thread: Wire Antennas and Foliage
Post: RE: Wire Antennas and Foliage
| Hi Colin,
Contact between the wire and foliage will very likely be an issue on those bands where it occurs in the vicinity of a high impedance point. For example, I once erected a 40m EFHWA by simp... |
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VK3PY |
Towers, Masts & Transmission Lines, Antennas
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4 |
1,738 |
08-07-2024, 08:31 PM |
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Thread: 2023 Summer VHF UHF Field Day 14/15 January
Post: RE: 2023 Summer VHF UHF Field Day 14/15 January
| Another rule that I observed being breached concerned the use of multiple call signs by operators, i.e. making contest exchanges under two or more callsigns. One such operator remarked that he "couldn... |
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VK3PY |
Contests, Field Days, Portable Operation, JOTA, SOTA
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7 |
2,099 |
18-01-2023, 10:55 AM |
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Thread: Mt Anakie 2m beacon... is it OK?
Post: RE: Mt Anakie 2m beacon... is it OK?
| The Mt. Anakie 2m beacon is currently free-running due to having lost its GPS lock. Whenever there is a power failure, the beacon reverts to its internal reference but does not resume GPS lock when po... |
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VK3PY |
AIS, Beacons, FM & TV DX
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3 |
24,575 |
14-11-2022, 12:37 PM |
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Thread: 2022 John Moyle Memorial Field Day Contest (JMMFD)
Post: RE: 2022 John Moyle Memorial Field Day Contest (JM...
| Thanks for following up on my question, Doug, and also to Denis for his quick response. It makes sense now. I haven't been much into digital modes, having only recently started operating FT8, which is... |
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VK3PY |
Contests, Field Days, Portable Operation, JOTA, SOTA
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14 |
2,204 |
21-02-2022, 01:58 PM |
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Thread: 2022 John Moyle Memorial Field Day Contest (JMMFD)
Post: RE: 2022 John Moyle Memorial Field Day Contest (JM...
| I haven't participated in this contest for nearly 10 years. Having more time on my hands these days, I thought I might have a go if my stars align for that weekend. Looking at its rules, I spotted thi... |
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VK3PY |
Contests, Field Days, Portable Operation, JOTA, SOTA
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14 |
2,204 |
19-02-2022, 12:20 PM |
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Thread: Mains Earth/RF Earth
Post: RE: Mains Earth/RF Earth
| Should one wish to isolate the RF earth from the mains earth with capacitor as Doug suggests, it's quite easy to fabricate a suitable capacitor. I've measured the capacitance of an A4 sheet of alumini... |
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VK3PY |
General Discussion
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7 |
2,229 |
28-06-2019, 02:34 PM |
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Thread: 2019 Winter VHF/UHF Field Day - 22nd / 23rd June
Post: RE: 2019 Winter VHF/UHF Field Day - 22nd / 23rd Ju...
| My brother Bert VK3TU and I mounted an impromptu outing for this event. Given that we only had a few hours' operating time and there were just the two of us, we decided to rationalise the equipment do... |
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VK3PY |
Contests, Field Days, Portable Operation, JOTA, SOTA
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7 |
2,274 |
24-06-2019, 08:48 PM |
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Thread: Signal on 144.2Mhz from FM broadcaster
Post: RE: Signal on 144.2Mhz from FM broadcaster
| Please report your findings after the field day so we know how it turned out. It's useful for others who may experience similar issues in the future.
Chas
VK3PY |
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VK3PY |
General Discussion
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7 |
14,246 |
11-02-2019, 07:51 AM |
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Thread: Signal on 144.2Mhz from FM broadcaster
Post: RE: Signal on 144.2Mhz from FM broadcaster
| To VK4DCM:
If the rogue signal really is emanating from the FM broadcast transmitter, no amount of band-pass filtering at your receiver will remove it. That's because it's a real signal. However, I... |
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VK3PY |
General Discussion
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7 |
14,246 |
08-02-2019, 12:38 PM |
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Thread: Impromptu 5.7GHz outing
Post: RE: Impromptu 5.7GHz outing
| Thanks, Damien.
No, it's not exactly a home-brew TX/RX. The rig started life as an Icom IC-202. Fed up with the rig's VXO drift and frequency uncertainty, I decided to re-purpose its main board by ... |
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VK3PY |
1296MHz, Microwave & Opto
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3 |
1,789 |
29-12-2018, 09:01 PM |
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Thread: Impromptu 5.7GHz outing
Post: Impromptu 5.7GHz outing
| Yesterday (Friday 28 Dec. 2018), Lou VK3ALB posted a request on the VK-VHF Reflector for a contact on 5.7GHz to test his newly-constructed transverter. By evening, he had several operators all agreein... |
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VK3PY |
1296MHz, Microwave & Opto
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3 |
1,789 |
29-12-2018, 05:36 PM |
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Thread: Beacons
Post: RE: Beacons
| VK5BC wrote: "With the number of VHF/UHF beacons in VK they could all easily fit into a 200Hz slot in our VHF/UHF band allocations."
Yes, they could, but how would you cope if such a beacon was ins... |
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VK3PY |
144MHz & 432MHz
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24 |
5,840 |
26-06-2018, 02:04 PM |
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Thread: For once, the tin foil worked...
Post: RE: For once, the tin foil worked...
| Quoting from the ABC article:
"A spokeswoman from Telstra said it appeared that in very few cases, some car key remotes struggled to connect with the car's receiver, so close to the powerful satell... |
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VK3PY |
Off Topic!
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5 |
3,326 |
22-05-2018, 04:17 PM |
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Thread: VK3 microwave activity day
Post: RE: VK3 microwave activity day
| Well, I'm now out of this event, my wife having torn her Achilles tendon, leaving her pretty much incapacitated.
This all happened yesterday while I had my microwave gear out on the work bench giv... |
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VK3PY |
Contests, Field Days, Portable Operation, JOTA, SOTA
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2 |
1,505 |
28-03-2018, 02:33 PM |
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Thread: WebSDR control
Post: RE: WebSDR control
| There is also a WebSDR app for Android called Pocket RX TX, or pRxTx for short, by PA3FWM. I have it on my Galaxy tablet. It's a free download with ads, or you can pay for the full, ad-free version.
... |
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VK3PY |
Transceivers, Transmitters & Receivers
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1 |
1,509 |
28-03-2018, 02:21 PM |
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Thread: Bird slug reads high
Post: RE: Bird slug reads high
| Lou,
You wrote: "I venture inside that tube is a trimpot, possibly 25K."
Nope. No trimpot. Re-visit the schematic diagram. There is a tube with an adjustable sleeve (shown as distributed capacit... |
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VK3PY |
Ancillary, Test Equipment, Components & Parts
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7 |
2,747 |
24-03-2018, 07:48 PM |
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Thread: Bird slug reads high
Post: RE: Bird slug reads high
| Lou,
Re-reading your initial posting, you mention the trimpot works OK. What trimpot??? There is no trimpot in my 50D element. Its circuit diagram is as shown in the accompanying schematic. The te... |
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VK3PY |
Ancillary, Test Equipment, Components & Parts
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7 |
2,747 |
24-03-2018, 03:05 PM |
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Thread: Bird slug reads high
Post: RE: Bird slug reads high
| Lou,
There isn't much inside a Bird slug, as you know. I'm curious why the diode and terminating resistors were replaced. Did you repair the slug yourself?
There is obviously too much coupled vo... |
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VK3PY |
Ancillary, Test Equipment, Components & Parts
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7 |
2,747 |
23-03-2018, 03:23 PM |
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Thread: FT817 Bias tee modification
Post: RE: FT817 Bias tee modification
| I can attest to the usefulness of this mod, having done it to my FT-817. However, be aware that it only works for the VHF/UHF bands. It does not provide the PTT switching voltage on the HF bands. Dunn... |
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VK3PY |
Transceivers, Transmitters & Receivers
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1 |
1,854 |
19-03-2018, 07:37 PM |
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Thread: VK3 microwave activity day
Post: RE: VK3 microwave activity day
| Good on ya Rob!
I'll definitely be on deck for this operation. It's been way too long between drinks! Not sure about 23cm, but several microwave bands from 2.4GHz to 10GHz ought to be do-able. QTH w... |
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VK3PY |
Contests, Field Days, Portable Operation, JOTA, SOTA
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2 |
1,505 |
19-03-2018, 07:23 PM |
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Thread: Rain effects: E.M.E...
Post: RE: Rain effects: E.M.E...
| Steve,
Perhaps this might go some way towards answering your question:
http://www.qsl.net/yu1aw/Misc/wetantenas.pdf
I have not read it yet myself, but from a cursory glance it appears very in... |
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VK3PY |
E.M.E.
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6 |
3,035 |
12-01-2018, 06:41 PM |
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Thread: 2M transmission shuts computer down
Post: RE: 2M transmission shuts computer down
| Wayne,
You haven't given much of a description your your station layout or computer set-up, but here's a suggestion. Could it be that you have a loose connector or poorly-terminated connector on th... |
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VK3PY |
Computer related
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6 |
2,759 |
11-01-2018, 04:16 PM |
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Thread: 2018 Summer VHF/UHF Field Day
Post: RE: 2018 Summer VHF/UHF Field Day
| VK4ADC wrote:
"..... I am finding that my interest in these activities is lacking due to the low participation rates in the recent FD events....."
Gee, I wonder why? Could it be because many of ... |
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VK3PY |
Contests, Field Days, Portable Operation, JOTA, SOTA
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7 |
2,472 |
08-01-2018, 06:10 PM |
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Thread: 2017 Summer VHF/UHF Field Day - Jan 14 and 15
Post: Re: 2017 Summer VHF/UHF Field Day - Jan 14 and 15
| The VK3UHF crew will operate from the usual location 15km west of Geelong, QF21CU. All bands 50MHz to 47GHz inclusive will be available.
This time we're going to concentrate on supporting Mike VK3BDL... |
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VK3PY |
Contests, Field Days, Portable Operation, JOTA, SOTA
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12 |
3,667 |
12-01-2017, 09:29 PM |
