Author: Dfg

  • Building your own Radio Station

    Building your own Radio Station

    The following guide mainly deals with modifying low power, short range FM adapters commonly used for allowing things like ipods and computers to output audio through an FM radio. This is based on personal experience and is illegal in most parts of the world, although depending on where you live they may not monitor for illegal broadcasts and in that case try to keep a low profile and not advertise that you are a pirate radio station, as amateur radio operators commonly report such things :mad:. The range of such a transmitter will generally average around 3 Kilometres ( about 2 miles )

    Transmitter

    Most low power off the shelf FM transmitters can have an external antenna attached if you have the time to study where you can and can’t connect an external antenna. Most transmitters have an internal coil antenna next to the main board which is ok if you have a legit use for the transmitter but for most is pathetic. Most can be upgraded by soldering the core conductor of a 75 ohm coax cable to the point where the internal antenna is soldered to and the shield wire should be connected to the negative battery terminal as that is generally the common point of the circuit. I would actually remove the internal antenna so all radiated power goes to your amp and antenna and not leak out through the internal antenna

    Amplifier

    The signal from the transmitter wont be strong enough on its own to cover any real distance so the signal needs to be boosted to be of any real use. A cheep way is to use a TV signal splitter/amplifier which most electronics stores sell. Although not as good as a proper linear amplifier it should give descent range depending on antenna and terrain. A linear amp can be built from plans on the interwebz or purchased from stores that deal with radios. eBay generally has amps for sale for a decent price if your budget allows.

    Antenna

    Helical Antenna

    Believe it or not your TV antenna will not work and will provide poor results in the long run. Search the net for Helical Antenna designs see Helical Antenna for details on this antenna design the picture above is an example of the design. I made mine out of PVC drainage pipe and fencing wire and it works very well for my needs. the antenna is circularly polarised allowing for better signal propagation over hilly terrain. The antenna needs to be impedance matched with amp and transmitter to give excellent results. The antenna will still work well unmatched but range is reduced due to wasted power. Online calculators will calculate impedance depending on number of loops and loop diameter. Size is crucial to the design and needs to be calculated for the exact transmission frequency of your transmitter.

    As you can see in the next pic, this is an example of a homebuilt antenna and it is the antenna I’m currently using.

    My Antenna

    By Daktologist

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  • A Look at Psychopathy and its Causes

    A Look at Psychopathy and its Causes

    Psychopathic or Sociopathic personality disorder is characterized by a complete lack of a conscience and empathy. Another name for it is Anti Social Personality Disorder. Anti Social doesn’t mean you avoid people. It means that your actions go against the laws of society, such as theft murder etc. It’s a particularly interesting disorder because it’s often the cause of most serial killer’s and other types of Murder. At this point there is no cure for it.

    History
    In 1801 Dr. Philippe Pinel wrote of patients that he described as la folie raisonnante (“insane without delirium”). This was the earliest psychiatric term for what would later be called the psychopath. In 1909 the term sociopath was first used. Before this they were known as “Moral Imbeciles”. The disorder did not make it into the DSM diagnostics manual until 1980 when Robert Hare created the Psychopathy checklist.

    Symptoms

    • Persistent lying or stealing
    • Apparent lack of remorse or empathy for others
    • Cruelty to animals
    • Poor behavioral controls — expressions of irritability, annoyance, impatience, threats, aggression, and verbal abuse; inadequate control of anger and temper
    • A history of childhood conduct disorder
    • Recurring difficulties with the law
    • Tendency to violate the boundaries and rights of others
    • Substance abuse
    • Aggressive, often violent behavior; prone to getting involved in fights
    • Inability to tolerate boredom
    • Disregard for safety

    The DSM IV criteria for it is as follows(The DSM Criteria is the major authority used to diagnose mental illness)

    1. There is a pervasive pattern of disregard for and violation of the rights of others occurring since the age of 15, as indicated by three (or more) of the following:
      failure to conform to social norms with respect to lawful behaviors as indicated by repeatedly performing acts that are grounds for arrest; deceitfulness, as indicated by repeatedly lying, use of aliases, or conning others for personal profit or pleasure; impulsivity or failure to plan ahead; irritability and aggressiveness, as indicated by repeated physical fights or assaults;reckless disregard for safety of self or others; consistent irresponsibility, as indicated by repeated failure to sustain consistent work behavior or honor financial obligations; lack of remorse, as indicated by being indifferent to or rationalizing having hurt, mistreated, or stolen from another.
    2. The individual is at least 18 years of age.
    3. There is evidence of Conduct disorder with onset before age 15.
    4. The occurrence of antisocial behavior is not exclusively during the course of schizophrenia or a manic episode.

    Psychopath’s are not the same thing as psychotic although this is often confused. While psychosis means having no grip on reality the psychopath is normally very in tune with reality they simply lack the part most people have that control’s guilt and empathy and other such traits.

    What Causes it
    There are many theory’s on what causes it although it’s true cause remains unknown. One prevailing theory is that it’s caused by severe abuse suffered during childhood. In many cases of Murder and Serial murder the killer came from a very unstable and abusive household. However this isn’t always the case for example both Jeffrey Dahmer and Ted Bundy, two of Americas most famous killers came from relatively normal backgrounds. Though there childhood’s weren’t perfect it still wouldn’t explain there future actions.

    So if it’s not abuse then what is it? Another prevailing idea is the bad seed theory. This states that some people are simply born evil. One study that lent credit to this theory showed that brain scans of people with this disorder showed very dead level’s in there frontal lobe which control’s emotion and remorse.

    How prevalent is it?
    Most estimates put the number at around 3% in males and 1% in females. This does not mean that all who have it will go on to kill. Many leaders and businessmen are likely to have this as the lack of feeling helps when getting ahead.

    The Mask Of Sanity
    The mask of sanity reffers to the fact that most of the time a psychopath is not easily recognized. In fact they often seem very charming and kind but these emotions are not real. The truth doesn’t normally come out until a crime has been committed and often unless the crime is serious enough it still goes unrecognized.Think of the psychopath as a Chameleon they can blend into almost any social group or situation even though none of there emotions are real.

    How to Stop it
    At this point there is currently nothing that can be don’t about it because they don’t normally willingly seek help and there exists no medication for this. With psychiatry still in it’s infancy there is a lot to still be learned. Hopefully one day as the science becomes more advanced a solution can be found. Until then be careful of that charming guy that wants to hitch a ride.

    By DirtySanchez

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  • How to Use Semicolons

    How to Use Semicolons

    How to Use Semicolons

    I remember throughout high school i could never figure out how to use a semicolon but as moved on to uni i learned how to properly use these little fuckers. It’s actually quite simple.

    There are 2 ways to use semicolons properly:

    1. To connect two independent clauses

    Independent clauses are series of words that could stand alone as complete sentences. When you have two otherwise complete sentences that you want to connect to form one long sentence, use a semicolon between them.

    Example: This could be a complete sentence; this could be another. Another example could be: Twelve workers started the project; only 3 remain.

    Now if you were to add “and” in the middle then you would need to change the semicolon to a comma.

    Example: Twelve workers started the project, and only 3 remain.

    2. To serve as a super comma

    When you have a series of three or more items that normally would be separated by commas except that each individual item already has a comma in it, you use the semicolon between items.

    Example: We visited Pago Pago, Western Samoa; Curitiba, Brazil; and St. George, Utah.
    Example: The trio’s birthdays are November 10, 1946; December 7, 1947; and October 31, 1950.
    Example: Her favorite players are Steve Young, a quarterback; Jason Buck, a defensive end; and Ty Detmer, another quarterback.

    As in the examples above, citing places, dates, and people’s names with descriptions, are three very common situations where you’ll see the super-comma usage.

    Semicolons make you look sophisticated in writing and could give people a good impression of you for college papers or paper work at your job. Once i learned how to properly use a semicolon i started having professors compliment me on my work more and i’ve been getting better grades in my English course.

    Hope this helped.

    By :mad:ijuana

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  • An Attempt at Eliminating Pedophilia

    An Attempt at Eliminating Pedophilia

    An Attempt at Eliminating Pedophilia

    From 1962 to 1972, two East Germans by the names of Dieter Müller, Fritz Roeder, and Hans Orthner put forth a surgical procedure that they theorized would cure pedophilia. Based on past studies done on rats, they planned to lesion the ventromedial hypothalamus in the brain. This has been shown to cause rats to become overweight and lose sexual interest. Eventually, they received permission from the government to test the procedure on repeat offenders. When these offenders were put on trial and convicted, they were given several options:

    • Indefinite jail sentence
    • Experimental brain surgery
    • Castration

    Needless to say, most of them chose to have the brain surgery. They performed the stereotaxic lobotomy of the ventromedial hypothalamus by drilling through to the specific location, inserting an electrode, and running a current to destroy the VMH. The majority of the procedures done were unilateral, that is they only destroyed one side of the VMH. Only one or two were bilateral, where they destroyed both sides of the VMH.

    After six months, they did a follow-up with the participants and found that pretty much all of them had no more pedophilia. Their procedure was labelled a success and was allowed to run by the government for many more years.

    They then took their results and presented it at a psychology conference, where they were immediately condemned. Not because of any ethics issues, but because of scientific issues. Past VMH lesions performed on rats were bilateral and destroyed both sides. It was accepted that unilateral lesions had almost no effect. Their response? “We didn’t want our participants to become overweight.” They made a huge false assumption. The VMH affects both appetite and sexual desire in conjunction, not individually. If the participants did not become overweight, they probably didn’t actually have reduced/eliminated sexual desire.

    There are two main reasons why they achieved the results they did. First, the offenders could have been lying so that they wouldn’t have to go to jail or face castration. Second, the placebo effect may have given the offenders the feeling that they were cured, but eventually it wore off.

    A fellow by the name of Gunter Schmidt, after a grueling process, convinced the government to give him access to contact the participants. He conducted interview to determine if any change in the offenders’ behaviours actually happened. Almost all of the ‘cured’ pedophiles were still exhibiting pedophilia. After that study was carried out, the government immediately pulled the plug on the procedure.

    So can VMH lesions cure pedophilia?

    Yes. Bilateral lesions are proven to eliminate any sexual desire.

    So why aren’t any bilateral VMH lesions done?

    Ethics. It can destroy who a person really is, and although many people disagree, dignity is still given to offenders.

    Article by Müller et al. on their procedure

    Article by Schmidt and Schorsch

    By Mayberry

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  • Antenna Connectors

    Antenna Connectors

    Antenna Connector

    As you may well know there are many different types of RF connectors. These range from your basic TV antenna connector right up to connectors designed for high powered transmitters. In this guide I will go over a few different types of RF connector and where you are most likely to come across a certain type of connector

    The “F” Connector

    This connector is commonly used in satellite TV applications it has a 75 Ohm impedance and is well suited for digital TV systems and such. It attaches by simply screwing onto the socket

    F connector:

    Belling Lee Connector

    You are probally famillar with this connector as it is the common tv aerial connector. It has a impedence close to 75 Ohms and does suffer from impedance mismatch between plug and socket. They are rare with modern digital TV receivers due to this fact. It attaches by simply sliding into its socket

    Belling Lee connector :

    BNC Connector

    Commonly found on scanners and some CB transceivers it is available in both 50 and 75 Ohm variants, it is a bayonet type fitting and the connector fits by pushing on and turning half a turn clockwise till it latches into place

    BNC connector :

    “N” Connector

    The “N” connector is commonly used with transmitters, especially on the UHF bands. it is also one of the only connector types able to carry microwave frequency signals. It finds use in homebrew long range WIFI setups. it simply screws onto its socket

    N connector :

    SMA Connector

    The SMA connector is commonly found on WIFI equipment as it can handle frequencies up to 18 GHz. This connector has an impedance of 50 Ohms and can also be found in a reverse variant. The normal variant has a centre pin on the plug and a mating hole in the centre of the socket, however in the reverse variant the pin is in the socket and the mating hole is in the plug. they attach by simply screwing onto the socket

    SMA connector :

    By Daktologist

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