The Electronics Universe

I used to have a large selection of smiles untill we redone the data base.
I will be adding more as we move along.
Can not remember where on this pc are those smiles!

2 added
:smileybaby: :bonk:

We have a few rules here.

1-No personal attacks
2-No personal attacks
3-No copy righted material or files posted
4-Post in appropriate forum
5-No vulgar material, porno, ect
6-Personal attacks will get you banned.
7-No spam. If you are here to advertise you will be banned. Suspect names and emails will be banned for suspicious. If you are legit then email webmasters@gokarters.com to state you identity. Spammers will not be tolerated.
8-All post belong to gokarters.com database and you are not allowed to remove post after a time limit of posting said post.
9-User are not allowed to delete account or remove there post (see rule
10-If you require a name change sumit a PM to Admin
gokarters.com/vbforum reserves the right to edit. lock. or remove any post or person on these forums.
All post and contence of www.gokarters.com belong to said website

First I like to thank the following.
N4CZT Doug, For getting me involed in Amateur satellite.

These guys helped me make my mind up on what I wanted to do.
K9STH Glen
KA4DPO John
WA9SVD Larry
KL7AJ Eric

W9GB Gregory, For helping me with some vital information


I been searching for months now trying to find a good design for a circular polarized 70cm yagi. All I could find is bits and pieces.
I took those bits and put them all together and this is the results.
This is a 10 X 10, total 20 element yagi.

Will edit this post as it moves along.
These first four pics shows how the boom is drilled.
I made a simple jig to hold the boom on the milling table.
Mark boom on two locations (vertical and horizontal). You and lay the boom in a piece of long angle iron to get it straight.

Align the bit with the mark and your hole will be at 90 degrees each time.

My boom is 1"OD x 1/16 x 72 inches.
All elements are 3/16 except driven. It will be 3/8"
Elements are insulated from boom. To reduce noise.
Driven element will have "gamma match"

Element length:
Ref- 12 15/16
drv- 12 3/4
D1- 11 15/16
D2- 11 13/16
D3- 11 5/8
D4- 11 9/16
D5- 11 1/2
D6- 11 7/16
D7- 11 3/8
D8- This one in still in question. 11 5/16 would be the next down step. 11 15/16 would blunt the pattern alot to take the sharpness off. 11 1/2 may be the better choice.

Spacing:
Ref= 0
Drv= 0-5 3/4
D1= 0-8 1/2
D2= 0-13 1/8
D3= 0-18 3/8
D4= 0-25 1/8
D5= 0-32 5/8
D6= 0-40 3/4
D7= 0-49 1/2
D8= 0-58 1/2

Horizontal plane will mount first.
Vertical plane will be shifted forward by 1/4 wave length.

Phasing harness will be two 75 ohm cables 1/4 wave length each.
Most antennas are on the same plane. You have to install a 1/4 wave length jumper to get circular polarization. You feed it 90 degrees out of phase.
Since the vertical elements at shifted forward 1/4 wave length (90 degrees electrical in space), the phasing harness is equal on each side, should give identical transformation of antenna impedance.

http://www.qrpkits.com/

http://www.smallwonderlabs.com/

http://www.amqrp.org/

http://www.elecraft.com/KX1/KX1.htm

http://www.mfjenterprises.com/Product.php?productid=MFJ-9330K

Started a new amplifier project.
More of a clone. It will be cloned after the AL-811h.

It will contain 4 811a\'s
I decided to go with this design because parts are still avalable.

Building the chassis.

http://wireless2.fcc.gov/UlsApp/UlsSearch/searchLicense.jsp

Took my upgradee test friday.

And passed
http://www.w4amc.com/barcnews.html

Here is the beginning of my new 6 meter rig. This is semi homebrew. The basic radio came from a MFJ 9406.

The small package made it impossible to upgrade or modify. I added a new chassis. A 6 to 1 ratio vfo mechanism. I have 12 amp power supply that I will be installing. Also a working and tested 6 segment LED readout.

The chassis was originally an old mobile 11 meter amp that I bought at a yard sale for 20 bucks. I stripped it down and saved some of the parts for later projects. The vfo mechanism is from a Pal vfo. I will be adding rf shields to the main board, vfo and display. This should help keep the display clock out of the receiver.

I also will be adding a squelch circuit, mic gain control, and a alc control.
I have to reprint the anolog disk once the radio is completed.

I will post more as this project progresses.