Search found 397 matches

by VK7HH
Sat Aug 24, 2019 10:08 am
Forum: 1296, Microwaves and Opto
Topic: Antennas for 3.4 GHz
Replies: 19
Views: 359

Re: Antennas for 3.4 GHz

Thanks Tim,
My LP antennas arrived the other day so I’ll start to have a play. Interested to see how you mounted the PVC feed arm into the existing metal arm? Can’t quite see in the photo.

Regards
Hayden
by VK7HH
Sat Aug 24, 2019 9:24 am
Forum: 1296, Microwaves and Opto
Topic: Antennas for 3.4 GHz
Replies: 19
Views: 359

Re: Antennas for 3.4 GHz

VK2XAX wrote:
Mon Aug 05, 2019 12:20 pm

I just need to add the coax and N connector and I'm done. I'll post test results when I've finished it.
Hi Tim,
I wonder how you got on with this and the results you found?

Hayden
by VK7HH
Fri Aug 23, 2019 9:21 pm
Forum: General Discussion
Topic: Giveaway! RigPi Station Server - MFJ-1234
Replies: 0
Views: 23

Giveaway! RigPi Station Server - MFJ-1234

Want to win a new RigPi Station Server? Giveaway time!
by VK7HH
Fri Aug 16, 2019 9:26 pm
Forum: General Discussion
Topic: RigPi Remote Radio review
Replies: 0
Views: 231

RigPi Remote Radio review

In this video I review the RigPi sold as the MFJ-1234.
This is a remote ham radio control and computer solution driven by a Raspberry Pi.

by VK7HH
Sun Aug 11, 2019 8:10 pm
Forum: 1296, Microwaves and Opto
Topic: 2.4 GHz contact in Southern Tasmania over mountains
Replies: 6
Views: 277

Re: 2.4 GHz contact in Southern Tasmania over mountains

Here is a follow up video on a rainy day in VK7.

by VK7HH
Fri Aug 09, 2019 9:42 am
Forum: 1296, Microwaves and Opto
Topic: VK7 ready to go
Replies: 0
Views: 184

VK7 ready to go

I made a similar post on Facebook, but posting here for easier discussion. I've got a new 36 element yagi for 23cm on the way, 2.4 GHz is ready to go, 3.4 GHz probably needs a better antenna with more gain - so, the question is... who is ready to break some records? We have several VK7's now running...
by VK7HH
Wed Aug 07, 2019 8:08 am
Forum: 1296, Microwaves and Opto
Topic: Antennas for 3.4 GHz
Replies: 19
Views: 359

Re: Antennas for 3.4 GHz

Thanks for that link Peter. I have ordered a few of those log periodic antennas. I wanted a couple for testing anyway. I'll have a play with the grid and post my results here.

Keep the ideas coming though. It seems the grid pack modification is probably going to be easiest for me.

Regards
Hayden
by VK7HH
Tue Aug 06, 2019 9:37 pm
Forum: 1296, Microwaves and Opto
Topic: Antennas for 3.4 GHz
Replies: 19
Views: 359

Re: Antennas for 3.4 GHz

Thanks Lou, that's an interesting looking site. I'll check it out!
by VK7HH
Tue Aug 06, 2019 11:24 am
Forum: 1296, Microwaves and Opto
Topic: Antennas for 3.4 GHz
Replies: 19
Views: 359

Re: Antennas for 3.4 GHz

Thanks Iain,
Looks good, do you have any more info on the construction of the bi-quad?

Hayden
by VK7HH
Mon Aug 05, 2019 1:30 pm
Forum: 1296, Microwaves and Opto
Topic: Antennas for 3.4 GHz
Replies: 19
Views: 359

Re: Antennas for 3.4 GHz

What model antenna Tim?

850 - 6500 MHz or

2100 - 11000 MHz?

https://www.wa5vjb.com/products1.html

Hayden
by VK7HH
Mon Aug 05, 2019 1:18 pm
Forum: 1296, Microwaves and Opto
Topic: Antennas for 3.4 GHz
Replies: 19
Views: 359

Re: Antennas for 3.4 GHz

Awesome Tim, be interested to know your results.

Is it possible to get the LPDA at the correct focal point? I have a spare conifer dish sitting at home
by VK7HH
Mon Aug 05, 2019 11:46 am
Forum: 1296, Microwaves and Opto
Topic: Antennas for 3.4 GHz
Replies: 19
Views: 359

Antennas for 3.4 GHz

Hi All, I want to get a slightly better antenna with more gain on 3.4 GHz than my GARC panel that I currently have. As I'm relatively new, I wonder what others have done? I've seen coffee can feeds etc.. but I don't have a dish just yet (still looking for one). Perhaps I can modify a gridpack antenn...
by VK7HH
Mon Aug 05, 2019 9:29 am
Forum: 1296, Microwaves and Opto
Topic: 2.4 GHz contact in Southern Tasmania over mountains
Replies: 6
Views: 277

Re: 2.4 GHz contact in Southern Tasmania over mountains

Hi Grant, The mesh antenna in the video is for 2.4 GHz. There isn't really a lot to be gained from trying to use such an antenna on 23cm too. There are plenty of 23cm antenna designs around - https://vk1nam.wordpress.com/2017/12/27/construction-of-a-23cm-1296-mhz-bi-quad-antenna/ https://vk1nam.word...
by VK7HH
Sun Aug 04, 2019 12:32 pm
Forum: 1296, Microwaves and Opto
Topic: 2.4 GHz contact in Southern Tasmania over mountains
Replies: 6
Views: 277

2.4 GHz contact in Southern Tasmania over mountains

An on air contact with my 2.4 gigahertz transverter and FT817. Earlier in the day we had confirmed that Richard VK7ZBX's system was also working. The path is not line of sight and is over 1200m (4000 feet) mountains. Amazing signal considering the path and the location of my grid pack.

by VK7HH
Wed Jul 24, 2019 10:03 am
Forum: 1296, Microwaves and Opto
Topic: Gippstech 2019 - Highlights package
Replies: 0
Views: 221

Gippstech 2019 - Highlights package

Some highlights from this years Gippstech conference

by VK7HH
Tue Jul 16, 2019 11:15 pm
Forum: Transceivers, Transmitters & Receivers
Topic: Icom IC-9700 users topic
Replies: 146
Views: 8816

Re: Icom IC-9700 users topic

Two new videos!

Glen VK1XX speaks at Gippstech 2019 about the IC-9700 and GPS locking board he has designed.



by VK7HH
Sun Jul 07, 2019 7:39 pm
Forum: FM, Repeaters, D-STAR
Topic: Amateur Radio Repeater Repair & Site Visit
Replies: 0
Views: 265

Amateur Radio Repeater Repair & Site Visit

Today I traveled to the site of an amateur radio repeater on UHF (70cm) that I maintain after a fault on the transmitter appeared and gradually got worse over the past few months. Lesson learnt - always bring EVERYTHING you may ever need! On my next visit I will bring back a replacement GPS antenna ...
by VK7HH
Wed Jul 03, 2019 10:38 am
Forum: WSPR
Topic: Using WSPR for weak signal propagation
Replies: 0
Views: 338

Using WSPR for weak signal propagation

How do you know if the band is open? Lots of CQ calls but no response? This video shows the benefits of using WSPR as a beacon mode to try to predict when propagation will be strong enough to support voice or CW communication and how to view propagation paths on any particular band on a WSPR map. In...
by VK7HH
Wed Jul 03, 2019 9:35 am
Forum: WSJT
Topic: WSJT USB Audio Sources???
Replies: 13
Views: 797

Re: WSJT USB Audio Sources???

Just seen this post. That's an interesting one Adam, and again one I haven't seen before.

Can you try another PC to see if it's able to be seen in there? Tried running WSJT-X as admin? Just trying to think what else to try....
by VK7HH
Sun Jun 23, 2019 4:39 pm
Forum: Contests, Field Days, Portable Operation, JOTA, SOTA
Topic: Winter Vhf/uhf field day 2019
Replies: 7
Views: 619

Re: Winter Vhf/uhf field day 2019

Managed a few contacts on otherwise a cold winters day