HAM Radio 3/hamradioversion3.0examsandprograms1992.iso/news/inham05/856.

Text File | 1980-01-01 | 10KB | 238 lines

INFO-HAMS Digest            Wed,  8 Nov 89       Volume 89 : Issue 856

Today's Topics:
              are QSL cards really necessary for awards?
                          Butternut Vertical
             Letter from the FCC: 20M Maritime Mobile Net
                        Need HV xfrmr....HELP
                         Product Review : KAM
                           schematic needed
                         Vertical HF Antennas
----------------------------------------------------------------------

Date: 8 Nov 89 18:40:42 GMT
From: shlump.nac.dec.com!ryn.esg.dec.com!pstjtt.enet.dec.com![e-mail]
Subject: are QSL cards really necessary for awards?

In article <[e-mail]>, [e-mail] (Goh Kawai) writes...
>Say, for example, you tape-record all your contacts.  Then, by
>listening to your tape-recordings, anybody can verify you have indeed
>worked the stations you have claimed to have worked.  There would be
>no need for obtaining QSL cards.

If nobody ever pretended to be a station they weren't then that might be
true.  But there is no way to verify the station you hear on the tape is
indeed the station it claims to be.  The thought is that by contacting
that station by mail and having the operator send a written confirmation,
you can reasonably verify the contact.  (There are scenarios where
fraudulent contacts can still be perpetrated, but they start getting out
toward the end of the bell curve.  I think a QSL card gives greater than
95% confidence that the contact was genuine.)

In re some other message:

Making out your own QSL cards and trying to pass them off for awards
seems to be in the gray area between ethical and unethical.  Certainly
if I found a lot of fill-in-the-blanks QSLs in the same handwriting, I
would put the entire stack under extreme scrutiny.  And maybe if I found
even one or two from stations that I knew don't QSL "nohow, noway" it
would be likely to turn ugly.  In a hobby that communicates around the
world, do you want your name associated with something that is not on
the up-and-up?

                >>>==>PStJTT
            Patrick St. Joseph Teahan Taber

Mail address:  ahhhhh, you don't want to send me mail....

------------------------------

Date: 8 Nov 89 15:59:42 GMT
From: ingr!b11![e-mail]  (Joe Herbster)
Subject: Butternut Vertical

In article <[e-mail]>, [e-mail] writes:
> I have recently purchased a second-hand Butternut HF6V vertical
> antenna.  The antenna is complete except for a section of 75-ohm
> matching line that was buried in the ground at the original installation.

    I bought a brand-new HF6V a year ago.  I couldn't find a place to
    run decent radials and then got a Cushcraft R4.  I still have most
    of the pieces to the butternut.  The coax i found in the box was
    a generic RG-59 hunk that was 62 inches long.  If I can find the
    original instruction sheet in my vertical piling system I will
    verify whether is was to be trimmed down or not.  Hope this helps.

                    de km4jn

------------------------------

Date: 8 Nov 89 19:29:37 GMT
From: vsi1!wyse![e-mail]  (Steve Wilson xttemp dept303)
Subject: Letter from the FCC: 20M Maritime Mobile Net

John Armond Writes
>The FCC seems to have done this in the past and appears to be doing it
>again here.  Ham radio axiom #1 - The more invisible we are to the
>Comission the better off we are.
>

>>I'm assuming no one thinks we should wish for more emergencies, but
>>how long, now, before someone concludes that the relaxation of normal
>>rules during emergency operation is no longer justified because all
>>organizations normally served during disasters, etc., should have
>>planned better for their own exigencies?
>
>I suspect that the obvious is being acknowledged.  That the technology
>now exists for most organizations to handle their own emergency
>communications.  Consider portable earth stations, for example.  And
>that in the big picture, the ham contribution is pretty small and
>getting smaller as alternative communications resources become
>available.
>
>In other words, we'd better clean up our act, cooperate with the
>Comission whenever possible, and take a good hard look at our
>real contributions in time of emergencies.
>
>John

I've got a real problem with this point of view.  I've just come off
a week stint of providing emergency service to several agencies.  The
thing you guys keep forgetting is that a disaster by definition is
when all of your normal capabilities in what ever capacity are
BROKEN/EXCEEDED.  Hams have in the past, and are currently providing
the required communications capability when the normal circuits
aren't enough, or circuit requirements come into being spontaneously.

Example 1.  The city of Hollister's EOC/Comm facility wasn't usable
            for something like a week.  Two different Com Vans built
        by hams with agency help(CDF and the city of Gilroy I
            believe) where used not to supplement, but to replace
            the lost capability.  Amateur frequencys where used to
            keep the city in contact with state and county officials.
            There wasn't any other way to do this.

Example 2.  Shelters were set up at various locations in the mountains
            that didn't really fit with the model of a shelter, i.e.
            structures to house people in. Several times it was more,
            Gee theres a flat space here where no trees are going to
            fall on us.  There isn't any phone service to places like
            this at the front end of an earthquake. Hams were the
            first and only people capable of providing communications
            to these remote locations initially.  Things like CelTel
            weren't reliable in those locations initially.

Example 3.  The EOC in the City of Los Gatos was initially not deemed
            hapitable.  They wound up setting up their operation outside.
            Phone service was extremely unreliable there for a couple
            days.  Hams were used for Red cross comm, and city comm
            to the shelters that got established.  Ham radio was also
         used to get to County Comm from there initially.

These are just a few of the instances I'm aware of locally. I'm sure
that there are dozens of examples from the rest of the Bay area that
I'm just not aware off.   Our capability to handle the overload proved
to be up to the task.  As far as the county, cities, and red cross are
concerned we earned our keep and then some.

As for giving into the FCC, it seems that they keep forgetting
that they work for the public, and this type of operation is nothing
but for the public good!  If they would simply bust some jerks instead
of making more things illegal when they aren't willing/capable to
enforce the laws that are ALREADY on the books things would be
alot more civil.

Steve Wilson KA6S

------------------------------

Date: 8 Nov 89 16:29:59 GMT
From: ingr!b11![e-mail]  (Joe Herbster)
Subject: Need HV xfrmr....HELP

Please Help,
    I am in dire need of a transformer for a tube supply.  I need to
    generate about 600vdc at 200ma.  The transformer can be either a
    single winding at 450vac, or 850 center tapped.  Anyone with one
    of these babies or having information on sources please respond.
    Any help at all wanted.

                TNX  de KM4JN

------------------------------

Date: Thu, 9 Nov 89 12:26:17 PST
From: [e-mail]
Subject: Product Review : KAM

I recently buy KAM at T.ZONE (Akiabara, Japan).
And I tried to connect it to my AT clone PC.
But KAM didnot react my typings though all the connection is VY OK.
I check all Computer I/F part of KAM circuits and finally
found some bad things.
 RS-232C data ( about +10 ~ -10V ) from PC was guides by a resister and
a capacitor, and a negative voltage (~ -10V) is pulled at the TXD pin.
and the signal is entered to XOR gate (CMOS 4030, or 4070),
another input of XOR gate is pulled up to ~ 10V.
This will normally work well, but my problem is :
 negative voltage of KAM is made with +12V and the specific
pull-down negative voltages are from op-amp(MC34074),
I found the negative supply voltage has VY MUCH ripples (10% or more.)
And this ripple makes interference to CMOS, so the output of
CMOS XOR is the SQUARE WAVE. (I had thought KAM's 68B03 CPU intentionally
make the square pulses for unique serial communication, hihi,
but oscilloscope drew the same pulse width of the ripple.)

 My solution of this problem is :

 1. Cut all the OP-amp driven pull-up and pull down of 4030(4070).
 2. +10V -> 5V (VDD line , pin 14 of 4070(4030)) with series of 10K Ohm
 3. -10V -> GND ( GND line , pin 7 of 4070)


------------------------------

Date: 9 Nov 89 03:41:32 GMT
From: quanta.eng.ohio-state.edu!phonon.eng.ohio-state.edu![e-mail]  (Prof. Ronald Long)
Subject: schematic needed

I need a schematic for a Mirage/KLM two meter amplifier
Model 3016. I bought it used without the manual. I am
having relay problems and also want to know how to hard
key it.

If someone could copy the schematic page from the manual
and send it to the address below I would be very grateful.

Ron Long W8GUS
1516 Essex Road
Columbus, OH 43221.

Thanks.

-=-
Ronald K. Long, Ph.D.
Ohio State Univ EE Dept., 2015 Neil Ave., Columbus, OH 43210
[e-mail]

------------------------------

Date: 8 Nov 89 22:37:35 GMT
From: fluke![e-mail]  (Frank Tomlinson)
Subject: Vertical HF Antennas

I am considing a vertical antenna, the Cushcraft R5 No-Ground-Radial
Vertical.  I am interested in hearing from others using multiband
vertical antennas.   What is your opinion of there performance?

Is the R5 design different from other verticals in some significant
way as to eliminate the need for ground radials?

How is the R4 different from the R5?

------------------------------

End of INFO-HAMS Digest V89 Issue #856
**************************************