Portable Part 15 AM SS-Tran AMT-3000 outside package

Bruce, Dog Radio Studio 2, your idea is even better than you think.

Frankly, the idea of a Part 15 mobile package is appealing and could be very useful to people who want to set up an efficient broadcast, then tear down and leave after it's over.

The fact that we mostly talk of permanent installations is incomplete. There really needs to be movable but efficient systems.

Bruce, do it! What can we do to help?

I'll let you know!

Bruce, Dog Radio Studio 2

The receiver will be a GE Superadio. It will
fun forever on 6 D cells.

The SS-Tran AMT-3000 will run on 13 1.5 volt batteries
for a total of 19.5 volts DC. That should run the
SS-Tran for about 10 hours, which will be enough for
the tests.

I just need to find some odds and ends. That will be
the hardest part.

With the AMT-5000 this should be easier to do.

Bruce, Dog Radio Studio 2

I hooked it up as described.

Now this whole set-up is by itself.

It is not connected to any kind of
ground or ground plane whatsoever.
It is just electrically floating, so to
speak.

It sounded wonderful on AM 1690, which
was retransmitting the 90.9 MHz signal
from the FM transmitter in the house.

The set-up was on the back deck. As expected,
it went nowhere, because it had no ground of
any kind to work against. Range was about
20 feet. If one compares this 20 foot range
to the range of my "permanent" Part 15 AM installation,
which went two miles, we'll - that's quite a
difference.

This isn't going to be easy.

Bruce, Dog Radio Studio 2

If I was a mad scientist I would fill a glass jar with a "secret formula" with a wire immersed in the sludgy stuff and passing up through the cork for connection as a "ground-in-a-bottle." It would have all the effect of an entire buried radial array, all compacted in the small bottle.

But, I am only mad, not a scientist.

"It is not connected to any kind of
ground or ground plane whatsoever.
It is just electrically floating, so to
speak."

Perhaps get a roll of chicken fence and use that as the counterpoise. Just roll it out under the assembly, connect and it should drastically improve that range.

Or take 4 or 8 spools of hook up wire and lay those out in a spiral pattern.

Or go the mad scientist method and get one of those kiddie pools and fill it, put the assembly on a float, use aluminum foil under the float for the ground contact, put the whole thing into the middle of the pool and see what happens.

RFB

Aside from the technical stuff, both
of you guys had me laughing, while I
was sitting here at the computer.

It sure is interesting. I expected a
little bit more than 20 feet, but I
guess that's the way it is.

I'll wire up a bunch of radials and
put the package in the back yard
tonight. We'll start with 4 radials
stretched out from the transmitter
package. I would make a ground screen,
but I don't have any mesh.

Thanks!

Bruce, Dog Radio Studio 2

So when an SS-Tran, or any other
AM Part 15 transmitter for that matter,
is plugged into the wall socket,
and is getting power via the
wall cube supply, is it sort of
trying to find ground? And is that
little bit of a connection making
the difference?

Bruce, Dog Radio Studio 2

Let me answer this! It's something I actually know the answer to. And they said "that'll be the day."

In the SSTran AMT3000 Manual, Page 18, Board Jumper Options, tells us that S2 and S3, when installed, provide an RF ground path through the transformer into the building wiring.

Oh wait........ you are on batteries........ but you might play with removing and re-inserting those jumpers, because the wire to the battery will provide some small ground plane.

Also, with S1 installed the audio negative side becomes part of the transmitter ground.

I may not have helped, but for that one second while I thought I knew something it was magnificent.

"So when an SS-Tran, or any other
AM Part 15 transmitter for that matter,
is plugged into the wall socket,
and is getting power via the
wall cube supply, is it sort of
trying to find ground?"

If the power source plugging into a grounded wall socket has the ground lead (3 prong plug/outlet), the TX can use that as a ground path, though not very effective for through the air transmission, but quite effective for a CC setup.

RFB

While listening to Amy Goodman interview filmmaker Michael Moore (Democracy Now - today) he had just spoken to the demonstrators on Wall Street, and a problem they had was that the NY-PD, who apparently are not under oath to defend The Constitution (the right to assemble, etc), has banned bull-horns and P.A. systems.

The perfect solution would be Dog Studio 2 mobile transmitters on open frequencies with word going out on Twitter: "Bring your portable radios!"

Low power radio might save the American way of life against hostile takeover.

"the NY-PD, who apparently are not under oath to defend The Constitution (the right to assemble, etc), has banned bull-horns and P.A. systems."

In 2007, while Alex Jones was on location in NYC filming for a documentary, he and his group just happened to stumble on a television set where Fox News was doing some live show with Geraldo Rivera. Alex and his group gathered around the rear of the stage and began to shout "9/11 Was An Inside Job" every time Geraldo was on the air.

A few minutes later, Alex managed to find a bullhorn and began shouting the chant through it, interrupting the telecast even more loudly.

Alex was arrested and charged with "Use of a sound device without a permit".

I do not know the specifics of the statue, but if it is not clearly defined, then they could declare ANY type of sound device used in ANY form of protest as illegal...including small radios.

Well...as Reagan always liked to say..."If not us..whom..and if not now....when?"

Too little too late.

Now back to your regular scheduled distraction program.

Speaking as his own honor, Carl Blare, highhorse judge is here to render verdicts.

I love Alex Jones, but it sounds from the description like it was impolite of him to interrupt Geraldo's show. But "unlawful use of a sound device" is too broad, and based on testimony from RFB it's being overturned.

In its place I hereby issue a new charge, that of "Interrupting Geraldo's show." GUILTY!

Please use your bull-horn and car horn in a civil manner.

It's gonna be hard to lay down a bunch of
ground radials in the middle of a pile of
protesters.

Ha!

Bruce, Dog Radio Studio 2

P.S.

I wanted to work on the portable transmit package
tonight, but it's raining. Oh Well.