Search found 53 matches

by VK4JAM
Thu Mar 31, 2016 9:51 am
Forum: General Discussion
Topic: What's on your Workbench?
Replies: 603
Views: 58414

Re: What's on your Workbench?

This looks similar (with the same specifications) to the frequency counter that I have been using for a few years, and I paid a similar amount of $$$ for it off e-bay. I have found it a good piece of kit for general amateur use. The stability of my unit is good and within specification - I reference...
by VK4JAM
Fri Mar 25, 2016 4:22 pm
Forum: Transceivers, Transmitters & Receivers
Topic: Chinese linear amp
Replies: 17
Views: 3173

Re: Chinese linear amp

Hi, The kit seems to be of good quality, it can also be purchased of Banggood for AU$22.60 including shipping. Refer: http://www.banggood.com/DIY-45W-SSB-HF-Linear-Power-Amplifier-Amateur-Radio-Transceiver-Shortwave-Radio-Development-Board-Kit-p-1018834.html A review on the banggood site states: "Th...
by VK4JAM
Wed Mar 23, 2016 9:18 am
Forum: 1296, Microwaves and Opto
Topic: 23 on 23 Wed Mar 23rd 2016
Replies: 3
Views: 636

Re: 23 on 23 Wed Mar 23rd 2016

Will aim to be on air.
73
Andrew
VK4JAM
by VK4JAM
Thu Sep 10, 2015 9:40 pm
Forum: PC/Mac iOS Software
Topic: Software for calculating feed impedance
Replies: 17
Views: 1522

Re: Software for calculating feed impedance

Hi Nev,
Try the following:

http://www.arrl.org/files/file/Antenna% ... 0W8WWV.pdf

It may point you in the right direction.

73
Andrew
by VK4JAM
Wed Jul 15, 2015 9:59 pm
Forum: 1296, Microwaves and Opto
Topic: Is this a simple way to get on 10 GHz?
Replies: 30
Views: 1636

Re: I this a simple way to get on 10GHz?

Hi Wayne, Perhaps .... I expect that frequency stability would still be an issue, but Gunn Diode based transceivers would probably be less stable. The unit looks like a doppler motion sensor. These are available off e-bay real cheap. You may find the following link of interest: http://www.limpkin.fr...
by VK4JAM
Sun Jul 05, 2015 8:04 pm
Forum: Satellites & Balloons
Topic: PS-46 PICO balloon HF payload WSPR JT9
Replies: 56
Views: 3812

Re: PS-46 PICO balloon HF payload WSPR JT9

Hi Bob,
Thanks for the feedback. I seem to be getting de-codes that do not always end up on the map?
I suspect that my firewall is being a problem.
73
Andrew
by VK4JAM
Sat Jul 04, 2015 12:42 pm
Forum: Satellites & Balloons
Topic: PS-46 PICO balloon HF payload WSPR JT9
Replies: 56
Views: 3812

Re: PS-46 PICO balloon HF payload WSPR JT9

Hi Andy,
Thank you, have upgraded to the modified version. Nothing heard so far.
73
Andrew
by VK4JAM
Sat Jul 04, 2015 11:27 am
Forum: Satellites & Balloons
Topic: PS-46 PICO balloon HF payload WSPR JT9
Replies: 56
Views: 3812

Re: PS-46 PICO balloon HF payload WSPR JT9

Hi Andy,

I am listening on 14.095.60, just want to confirm the RX on WSJT-X should be 1800 as shown.

73
Andrew
by VK4JAM
Mon Jun 08, 2015 7:43 pm
Forum: Transceivers, Transmitters & Receivers
Topic: Opinions on the FT-857D
Replies: 12
Views: 1560

Re: Opinions on the FT-857D

I have also had and 857D in a 4wd mobile situation (Pajero NL) since 2005. Similarly it has performed flawlessly - no display issues.
I use a panel extension kit, with the main radio boy located under the driver's seat. A brilliant radio!!!
73
Andrew
VK4JAM
by VK4JAM
Tue May 19, 2015 11:31 pm
Forum: Ancillary, Test Equipment, Components & Parts
Topic: LC Meter options?
Replies: 13
Views: 1363

Re: LC Meter options?

I have one of these off e-bay: http://www.ebay.com.au/itm/Handheld-Capacitance-Inductance-L-C-Meter-LCR-LC200A-Multimeter-Electric-Bridge-/221270029038?pt=LH_DefaultDomain_15&hash=item3384b8b2ee It appears to do what it claims, and will set you back around $45 posted. Measuring SMD inductors may be ...
by VK4JAM
Thu Apr 30, 2015 7:17 am
Forum: Beacons
Topic: Beacon Database changes
Replies: 52
Views: 5047

Re: Beacon Database changes

Hi Adam, The updated page is fantastic!!! I like the path profile addition. :D The feature to report S/N ratio for JT(x) was there all along, I just had not noticed it - thanks for pointing it out. See http://physics.princeton.edu/pulsar/k1jt/wsjt.html for info on the WJST modes : JTMS, FSK441 for m...
by VK4JAM
Tue Apr 28, 2015 6:08 pm
Forum: Beacons
Topic: Beacon Database changes
Replies: 52
Views: 5047

Re: Beacon Database changes

Hi Adam,
The changes look great. Just a suggestion, with the addition of JT4 perhaps an additional column for Digital Signal reports that are specified as signal-to-noise ratio (S/N) in dB.
RST is good for CW, but we give a more quantitative measure with the digital modes.
73
Andrew
VK4JAM
by VK4JAM
Tue Apr 28, 2015 5:45 pm
Forum: Beacons
Topic: VK4RBB - Brisbane beacons back on air
Replies: 15
Views: 2728

Re: VK4RBB - Brisbane beacons back on air

Hi Peter,
Thanks for the info - working great using JT4F.
23cm decode attached :D
73
Andrew
VK4JAM
VK4RBB 23cm 28042015.JPG
by VK4JAM
Tue Apr 28, 2015 5:31 pm
Forum: Beacons
Topic: VK4RBB - Brisbane beacons back on air
Replies: 15
Views: 2728

Re: VK4RBB - Brisbane beacons back on air

VK4RBB 70cm 30042015.JPG
A big thank you to the Brisbane VHF crew. I am hearing the VK4RBB 70cm and 23cm beacons stronger than ever.

I like the JT4 addition :D . A decode off 70cm is attached, still having difficulty decoding 23cm. Perhaps it is not JT4D???

73
Andrew
VK4JAM
by VK4JAM
Tue Apr 14, 2015 7:13 pm
Forum: Arduino, Picaxe, Raspberry Pi, and variants
Topic: pcDuino Single Board Computer
Replies: 1
Views: 396

Re: pcDuino Single Board Computer

Hi Adam, A good question, but I do not think so. PcDuino Nano V3.0 - All Winner A20 SoC (Dual Core) Raspberry Pi 2 Model B - 900MHz quad-core ARM Cortex-A7 CPU Both have 1 Gb RAM and run various flavours of Linux, but there is extra $ for a lower spec CPU if you go down the PcDuino path. Yes, it is ...
by VK4JAM
Sat Mar 21, 2015 8:34 pm
Forum: 1296, Microwaves and Opto
Topic: 23-on-23 - March 23, 2015
Replies: 9
Views: 501

Re: 23-on-23 - March 23, 2015

Scott - I will aim to be there, family commitments permitting. Shane - A real rough path to you from my QTH, some 818.161 Km over mountains :shifty: Rex - I should be able to work you. Have worked up that way previously, but with an 18dBi grid I find that I am am constantly on the rotator looking fo...
by VK4JAM
Sat Jan 24, 2015 9:47 am
Forum: 144 & 432 MHz
Topic: VHF 300W linear project 50v LDMOS
Replies: 4
Views: 1142

Re: VHF 300W linear project 50v LDMOS

Thanks for sharing this. The 3.5", 480x320 high resolution Intelligent Display Module looks great, but the price is a little high on the URL you have listed. There seem to be lower cost options on eBay, such as "SainSmart 5" 5 TFT LCD Touch Panel (Resolution 800x400) + TFT LCD Shield For Arduino Meg...
by VK4JAM
Fri Jan 23, 2015 4:57 pm
Forum: 1296, Microwaves and Opto
Topic: 23 on 23 Jan 2015
Replies: 6
Views: 452

Re: 23 on 23 Jan 2015

I aim to be around. As usual the rotator will be doing overtime as I swing the antenna around :eh:
by VK4JAM
Wed Dec 17, 2014 11:07 pm
Forum: 1296, Microwaves and Opto
Topic: 23-on-23 - December 23, 2014
Replies: 5
Views: 487

Re: 23-on-23 - December 23, 2014

Hi,
I aim to be there. Hopefully all the Xmas shopping will be done by then, or at least the XYL will have had enough of the shops!!! :D
73
Andrew
VK4JAM
by VK4JAM
Sun Oct 26, 2014 8:22 pm
Forum: Ancillary, Test Equipment, Components & Parts
Topic: Which Morse Key?
Replies: 16
Views: 920

Re: Which Morse Key?

I use a WESTERN UNION LEGLESS 2-A TELEGRAPH KEY & SOUNDER on my TS-2000X. It is well over 100 years old from the 1800's, works well, and looks neat :D I do not have the sounder connected, just the key. But the sounder does work :-) I suggest that the key thing is to find something that you like and ...