"John - KD5YI" wrote in message
...
On 3/17/2011 9:27 AM, amdx wrote:
"John - wrote in message
...
Mike -

What are you working on now? Your projects interest me.

Cheers,
John

I'm sorry to say that working for a living gets in the way, of my
important
to me work :-)
Add to that a few household projects, such as building a fence around one
side of the house,
and some other minor repairs, I haven't had much time.

That's understandable. Well, you can look forward to retirement, then.

I'm still on a quest for a high Q inductor of about 240uh. I hope to
hit
2000. That involves
building a new polystyrene frame and two or three bundles of 660/46 litz
wire.

I'm interested in not only whether you achieve your goal, but your trials
and tribulations along the way. Please keep us informed as your time
permits.

I still want to finish the high input impedance amp I had questions
about. I have three PCB's
with the basic amp so one will be with a 0,3pf input cap to 20 Meg and a
fet
gate. Another
will be a bootstraped input which as I understand, should be better. The
third is unknown,
If I get the bootstrap working well, I may finish the third and try to
sell
it on a crystal radio group.

I'm also very interested in the amp as an aid to achieving your goal. For
some reason, I'm a bit leery about it. However, your progressive story
might change that.

Summer is the busy time for my business, so I won't get much important
work :-) done for a while.

I have a flag antenna up in my yard.
http://i395.photobucket.com/albums/p...P1010128-1.jpg

(Basic Flag antenna info, if your not aware,
http://www.hard-core-dx.com/nordicdx...lag/index.html)

Is that a metal mast and how close is the bottom antenna wire? It looks as
if the antenna wire is insulated. Yes?

Yes, the mast is metal, and the wire is insulated. At the
present time I have
450 ohm ladder line running around the frame as the antenna. I
used that because
I had a thought about some type of phasing between the two
wires, but I have not
done anything further.


When I built the antenna, the idea was fairly new and I figured there
would
be some changes to the design,
with that in mind I built it so I could tilt the crossbeam for easy
access
to the matching transformer and
termination resistor. This assembly allows me to tilt the crossbeam.
http://i395.photobucket.com/albums/p...m/P1010135.jpg

Interesting. You seem to be good at mechanical stuff. I am lousy.

By pulling on a rope, the pin slides and allows the tilt.
The mast is also on a rotor.
http://i395.photobucket.com/albums/p...m/P1010129.jpg

There have been a few improvements, such as the Waller,
http://www.n4is.com/waller/BIG_DUAL_LOOP.html
But I have made any changes to mine.
Time to get to work.
Later, Mike
PS. have ya seen my electric gokart? :-)

No. Aren't all go carts electric?

Here's a video, that's about 2 years old. I have since put new deep cycle
batteries on it.
It has a lot of torque, the kids love to do donuts, ok, I do too!
I smoked the first motor after a year or year and a half. Actually the
motor was ok, but
a connection between one 4 gauge wire and eight 16 gauge wires overheated
and created
a lot of smoke. I had a second motor, so I made another motor mount and put
it on.
This started as a project to get my 16 yr old son to build something
instead of play video games.
It was more my project than his, but I had some time with him and he learned
a little, so I'm glad
I did it. He is too.
http://www.youtube.com/watch?v=5MKjbXltAew
Mikek