Category Archives: Uncategorized

New SSB/CW dual-band for 4 and 6 meters

Good news. This looks like a great rig. I want…

Ham Radio Blog PD0AC

Still in beta, but might be interesting for the European market. A company called “Noble Radio” (link) is developing a dual-band SSB/CW transceiver for 4 and 6 meters. Price point unknown at this time.

Noble Radio

Preliminary Technical Specifications

Frequency Coverage
4M: 69.9 MHz to 70.5 MHz
6M: 50.0 MHz to 52.0 MHz

Modes:
SSB (USB & LSB) and CW

Circuit Type: Down converting design
Dual Conversion: 1st IF: 10.7 MHz 2nd IF: 25 kHz

Sideband elimination using phasing techniques with digitally generated Quadrature carriers and Image Reject Mixers preceded by 15 kHz crystal roofing filters

Ultimate receiver bandwidth set by adjustable SCAF filters (two 8th order filters used. One for High Cut and one for Low cut)

Sensitivity:
MDS = -130 dbm

Dynamic Range Figures:
Blocking: 110 db
IMD (3rd Order) = 95 db

Selectivity:
500 Hz to 4 kHz adjustable with the SCAF filters
Ultimate attenuation of filters are 55db…

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SOTA – Homebrew 23cm 12 element Yagi Antenna

Super homebrew work well worth the reblog.

Get out of the Radio Shack and Live Life

Sunday 18 June 2017.  I recently purchased a new 2.5 watt 23 cm transverter from SG-Lab in Sofia Bulgaria. The package includes a 2el HB9VC PCB which has turned out to be a great addition for portable work, particularly from a hilltop with a good uninterrupted view of the horizon.  Today from the summit of Mt Taylor VK1/AC-037 locator QF44MP, I worked Rod VK2TWR in Nimmitabel over 130 km, not bad for 2 watts in to a tiny PCB antenna.

While the PCB antenna is a great addition to the SOTA kit, be it for local summits or perhaps on a long hike 10 km or more, what I really need is an antenna with a fair amount of ‘oomph’ that’s non-techo speak for gain, whilst keeping weight and size or length within reasonable limits.

For SOTA purposes keeping antenna construction as simple as possible is a key attribute to…

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SOTA – Getting on 1296 MHz with a Transverter

I hope to be on 23 cm myself by the end of 2017. Great stuff!

Get out of the Radio Shack and Live Life

How do you get on 23 cm 1296.2 MHz USB for SOTA activations without forking out loads of dough for an ICOM IC-910 or IC-9100?  Answer a lightweight all mode 2.5 watt 23 cm transverter from Hristiyan LZ5HP in Sofia Bulgaria.  The current unit on offer is version 2.3.

SG-Lab all mode 2.5 watt 23 cm Transverter version 2.3.  The parcel arrived after 13 calendar days between Bulgaria and Canberra Australia, pretty good considering the transition points along the way.

The 23cm transverter’s default configuration is simplex with the local oscillator (LO) set to 1152 MHz.  The unit has internal jumpers to change the LO frequency by +/- 2 MHz, this option permits simplex operation on 1294 MHz FM.  A separate jumper configures the unit for simplex or repeater operation while a fourth jumper configures the repeater offset which in VK is 20 MHz.  We don’t have a 23cm repeater…

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Sporadic E on 6m – 50 MHz SSB

Sporadic E in Australia and what can be done with a modest antenna. Interesting. Well done, Andrew.

Get out of the Radio Shack and Live Life

Tuesday 20 December 2016. Operating from my home QTH (QF44MP) 9 km south-west of Canberra GPO, I made several 6m Sporadic E QSOs today plus Matt VK1MA, currently on Norfolk Island 1908 km (1,185 miles) north-east in the South Pacific Ocean, reported hearing me call CQ on 50.110 at 01:15 UTC 🙂

Stations heard: ZL1TAP calling CQ DX on 50.110 and Frank VK5KV in Port Augusta, South Australia.

My equipment: Yaesu FT-857D @ 80 watts. Antenna is a homebrew omnidirectional 1/2 wave vertical mounted 500 mm above a flat corrugated iron garage roof. 🙂

VK1AD 6m QSOs, 20 December 2016:

Time UTC Frequency Callsign Name Report Grid/Location
1:05 50.120 VK4AML Greg S58 R59 QG62LP 963 km (598 miles)
1:18 50.165 VK4AMG George S59 R53 QG62LO 959 km (595 miles)
3:21 50.160 VK5XDX Oly S59 R59 Angle Vale, PF95HI 951 km (590 miles)

Post update @ 0900 UTC:

At 08:11 and…

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SOTA – Yaesu FT-857D configured for SSB

Useful info on a handy little rig.

Get out of the Radio Shack and Live Life

For Yaesu FT-857D owners, I have published a Quick Reference Guide on the configuration of the radio using a standard MH-31 microphone or the MH-59 AJ8 remote DTM microphone.  I prefer to use the MH-59 DTMF microphone with programmable P1 and P2 buttons for quick access to selected menus.  Watch out for the nifty VFO wheel on the upper right edge of the microphone just where your right thumb sits.  Yes I too have been caught out shifting the VFO in the middle of a SOTA contact!    🙂

See my new page  FT-857D Menu Settings

FT-857D deployed for a SOTA activation of Mt Little Joe VK3/VC-027 FT-857D deployed for a SOTA activation of Mt Little Joe VK3/VC-027. The Mic pictured is the standard MH-31

Purchased accessory MH-59 A8J DTMF Microphone

MH-59 DTMF Microphone MH-59 A8J DTMF Microphone. The VFO thumbwheel is pictured on the edge of the microphone.  P1 and P2 buttons are programmable to give you direct access to two selected menus.

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Shingleback or Stumpy-tailed Lizard 

Always keep your eyes open in the countryside. You might get a bonus like this.

Get out of the Radio Shack and Live Life

Walking at lunch today I passed this perfect specimen of the Shingleback. Length is about 350mm or 14 inches in the old scale. The shingleback lizard is native to Australia. The name ‘Stumpy’ is from the short tail.

Canberra is well-known as the bush capital.

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Excellent VK0EK Heard Island Video by Vadym, UT6UD

Noble but chilly expedition in the names of amateur radio and perhaps international understanding also

Please enjoy this excellent video made by Vadym, UT6UD who was one of the “dynamic duo” on Top Band (along with Dave, K3EL), and a major reason why VK0EK broke Top Band records from Heard Island:

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