/diy/ - Do It Yourself

>>672566
diamond tuck

>>672268
have you tried Fastenal ?

>>671367
very nice anon
here's one I made using 1cm x 1cm extruded aluminum C channel

>>670771
I'm not sure what you mean by "antenna wires"

a yagi-uda antenna has several parts

the central support beam and various crosspieces or "elements"

the element at the far left in your pic is called the reflector
the next in your pic is a loop in this case and that place in line is called the driven element
the next 11 crosspieces are directors

the reflector and directors are all electrically connected to the beam

the driven element has 1/2 connected to the beam the other 1/2 usually connects to the center of the coax, the beam and all the rest is electrically connected to the shield of the coax


the length of each element and the spacing between is what determines the frequency of use

if I remember correctly it's something like

spacing = ~ 1/2 wavelength
reflector element > 1/2 wavelength
driven element = 1/2 wavelength
director element < 1/2 wavelength

antenna theory is part black magic anon,
if you really want to build your own I would suggest looking up the ARRL antenna handbook
http://www.ce5prd.cl/documentos/antenna_handbook/00.pdf

>>670088
thanks anon, I like the old tube stuff. it can be a little ticklish to work on, but I understand it.

I don't think the tests will be a problem.

I'm really impressed with the things people are doing on RTL-SDR.com
I've been out of the loop for a couple of decades, and I'm just blown away what a $20 usb dongle and software can do.

as far as ham radio goes, I think it's "work the world" as you put it, and I'll shoot for the General or Extra class for the freqs and modulations it allows.

I am also seriously impressed with the JT65 modulation / encoding scheme

I'm very glad to find out the amateur radio world is still alive and kicking

>>669178
>Is there any legitimate way to earn money online?
amazon turk

I've used it, it does pay, the work is tedious

>>669749
ok...
and that is going to mean something to him ?
for all I know you are just some troll who got his name because I posted the callsign

I'm rather inclined to believe that is the case as you didn't see fit to answer any questions I posted, didn't list a name or callsign until I asked... so...

>i guess I'm not as dumb as you look

>>669737
damn! well it's a small world.
I'll see him tomorrow, who is saying hello?

>>659832
>E4K
wow, I didn't realize what these things could do.

got a serious question

I just helped my landlord (WA9GUH) move his tower and he's offered me an old ham rig, a swan cygnet 270, it works. is this a decent rig to start out on? I've been interested in ham for a long time but I haven't checked the regs in decades, I've heard that a novice license is no morse required, how is it for the upper levels? I've been into electronics since integrated circuits began and hold a broadcast tech cert from the SBE so the tech part of ham tests shouldn't be a problem but I've never learned code and I wonder if I'll need to in order to do anything interesting.

related question, what is the ham world doing for data these days? last I heard it was "packet" 1200 baud stuff is that all there is?

anybody do slow scan?

>pic is 40ft tower and antennas for landlord