Finally got a chance to test out this new project and the results are absolutely amazing. The Christman phasing system can be a big advantage for QRP stations. I plan to build a a smaller version of this Cir easier portable use in the field.?

I’m on an iPhone. I just take a pic and post it to the server. I’m not emailing it to anyone. The server here is hosting it. If I was on a dial up 56k, I would just set my email options to just receive a daily summery of post to the group, just common courtesy to average internet speed users. And I don’t have any UHF/VHF antennas. I stopped using 2 meters because it’s got to many complainers, at least around here.?

73,?
KG2RG

W8SWL,
your not actually set up to receive the entire groups emails and photos to your limited space email address are you?

I belong to 4 groups on here and I rarely post, however, some of the groups send out many emails like the SKCC (Street Key Century Club) send out somewhere in the neighborhood of 60 emails a day with many attachments of keyers. It’s probably easier for you, the individual to limit your email Preferences then to expect an entire group to limit the content they are posting. The group admins can also set the attachment limits and file size if they don’t want members posting media content.?

My phased array system is almost complete, just need to order 2 male and 2 female 3 prong panel connector/plugs.?

this will be for the house and I will be able to phase 2 verticals for end firing to the east or west or broadside to the north and south.?

after I complete this project, I will make a very small and light weight portable QRP version so I can put my 5W and ears where I want at the flick of a switch.?

il updated this thread to report the results once I have complete the projects and collect some data from the field.?

开云体育

KG2RG,

In the future please compress your photos before sending.?? I have a limited mailbox and your 25mb? sized e-mail put me over the top last night.? There are ways to reduce JPGs to a few hundred kb rather than several mb sized.

Thanks and 73,? Don

Hello to my X5015 QRP portable family,?

Yeah sure!
the FT140-43 toroid is great for QRP. It’s important to note that the random wire end fed and the 1/2 wave end fed are 2 completely different ant. The Random wire uses a 9:1 unun and you do not use a FT140-43. The 1/2 wave end fed is a 1/2 wave length wire, fed at the end and the impedance is somewhere in the range of 2200 to 3100 ohms. Different bands, material, environment are some factors to why the impedance at the end feedpoint varies, but it’s within a small window.?

I originally tried a 49:1 unun but bit better results with a 64:1 unun with the materials I use, and the bands I operate on, 20m and lower. The 49:1 is 2 primaries and a total of 14 turns. 2 and 14 is a 7:1 ratio. Square the 7 and it’s 49. 1 is your 50 ohms. 50 ohms x 49 equals 2450 ohms. So a 49:1 transforms 2450 ohms down to 50 ohms.?

My antenna were reading a higher impedance at the feedpoint and I needed more transformation, so I tried a 64:1. On some bands, this is perfect, on others, it’s a little to much, but still closer then the 49:1 and I get higher/better return loss and I’m closer to 0 reactance on my design frequencies, usually aiming for the center of the band.?

The 64:1 unun is 3 primaries and a total of 24 turns. I crossover from one side of the toroid after turn 12, and turn 13 starts the other side as I work my way to end turn 24 at the far side of the toroid.?

I’m using 18 gage magnet wire. for winding and 14 gage flex weave for ant wire ?

please note that the image is of a 64:1 on a larger FT240-43 toroid and is jest better for viewing the windings.?

?

开云体育

Hello to my X5015 QRP portable family,?
I have not checked in for a while and thought I’d stop in, say hello and give a report on the projects completed and current projects.?

The 1/2 wave end fed is my favorite portable antenna. I make 2 versions. version 1 is rugged, using a ft140-43 and 14 gave flex weave.?

Version 2 is using a small FT50-43. I have not paired it up with wire yet, but planning on something super light but with some quality.?

anyway, now I’m working on phase array. I’m going to start off with 20 meter and if that goes well, I’ll possible upscale to a 40 meter and an 80 meter version. So far I have the 71° Delay line and the two 84° Lines cut and tuned to 0 reactance. Now I’m building the relay box. I have the 5 SO239 connectors installed and all the shields connected together. I just need to wire up the 2 relays and and then I’ll build the control box. Eventually this 2 vertical phased array should be both end firing and broadside with 4 directions.?

as for the verticals:
most hams using this system are running 1/4 wave verticals with 1/4 wave spacing. However, I plan to try using 2 end fed 1/2 waves with 1/4 wave spacing.?

So, keeping busy here and sometimes finding time to actually get on the air and rag chew with friends or chase DX. I’m just waiting for the warmer weather and then I’ll be out there with the XYL on our tandem bicycle and operating during our out of saddle time.?

73 all
KG2RG