HDTenEightyP/NetNews huggingface dataset:
Newsgroups: alt.radio.pirate

You didnt give your name, so I'll call you Mr. Valdez, ok?

Well, Mr. Valdez....you can save yourself a lot of time and effort by 
purchasing a commercial low pass filter that are usually used in ham 
radio..they I believe will work fine for the AM band, although they 
are typically spec'd for the 160 to 10 meter wavelengths... 

You have lots of reference material available...I would recommend the 
Amateur Radio Relay League's ARRL Handbook..if you know any Hams, they 
will have one, or your school library is bound to have one...are you 
at UCSD? I'm from San Diego.. anyway these low pass filters are multi
section L-C filters...they will handle up to 100 watts easily..

Forget Chebyshev and all the rest of those active filters etc... there
are books (I have one with the info if you need any info) with cookbook
info i.e. plug the frequency in and presto here are the component values
because they require typically +/- power supplies (op amps) and generally
if you are not an EE major, a headache.. The L-C filters in the ARRL
handbook will also be of the plug in values form (I think) and its easy
to find or make the inductors and buy capacitors although if you construct
the L-C filter you may need tools to work the sheet aluminum into a several
sectioned box enclosure for shielding etc... 

Good luck my friend...stay in touch

Sounds like fun.

Tony WB6TRU
From: ci167@cleveland.Freenet.Edu (David Hoppe)
Newsgroups: alt.radio.pirate
Subject: Information wanted..
Date: 12 Dec 1992 10:19:02 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu


  IS there a FAQ for alt.radio.pirate? If so could some post it, or mail
it to me?  I'm looking for some schematics or plans on designing and 
building a AM/FM transmitter.  I do not have FTP access, but I could probably get them ftp mail, or someone could mail them or post them on here.
Newsgroups: alt.radio.pirate
From: cward@lynx.dac.northeastern.edu (clay ward)
Subject: FM/AM Transmitters.
Followup-To: N.A
Summary: Looking for information
Keywords: Transmitters,Information
Organization: Northeastern University, Boston, MA. 02115, USA
Date: Sun, 13 Dec 1992 19:49:19 GMT

	I am looking for information on obtaining FM or AM (small
distance) transmitters, if anyone has the address of any companys that i
can get a catalog from or if they have textfiles or anything related to
the topic, PLEASE, drop me some email... thanks in advance...

cward@lynx.dac.northeastern.edu

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
...my moral standing is lying down..
	-NiN.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 
Newsgroups: alt.radio.pirate
From: markz@ssc.com (Mark Zenier)
Subject: Re: Short Range AM transmitter
Organization: SSC, Inc.,  Seattle, WA
Date: Wed, 16 Dec 1992 22:27:05 GMT
X-Newsreader: TIN [version 1.1 PL6]

David Serhienko (serhienk@cobber.cord.edu) wrote:
: The admin is not aware of our
: plan, but an FCC license is not necessary until radius is 2 miles (is that
: right) and once we have it patched, they will leave it in, we're sure.  

Nope, it's not right.

47 CFR 15.221 sez

" (c) at the perimeter of the campus, the field strength of any emissions,
including those within the frequency band of 525-1705 kHz, shall not
exceed the general radiated emissions limits in (paragraph) 15.209"

And a lot of other stuff related to operating a carrier current system
on campus (about a half a page).

Mark Zenier  markz@ssc.wa.com
From: mycal@netronix.com (Just Mycal)
Newsgroups: alt.radio.pirate
Subject: FM radio hacking 
Distribution: world
Date: Wed, 16 Dec 92 18:01:54 GMT
Organization: Netronix, Inc.


ooops, address is

mycal
co/netronix
1372 N. McDowell Blvd.
Petaluma, CA 94954


-------------------------------------------------------------------------
Restrictions Suck!  Information is cool.                  |
Ignore info/freedom restrictors is the rule.              |
                                                        // \\
Your Pal Mycal -- mycal@netronix.com                 pirate radio!
Newsgroups: alt.radio.pirate
From: svaldez@ocf.berkeley.edu (Steve Valdez)
Subject: Re: Short Range AM transmitter
Organization: U.C. Berkeley Open Computing Facility
Date: Sun, 20 Dec 1992 00:14:45 GMT
Distribution: na
X-Posted-From: avalanche.berkeley.edu
NNTP-Posting-Host: sol.ctr.columbia.edu

In article <1992Dec19.210826.3513@cbnewsd.cb.att.com> varney@cbnewsd.cb.att.com (Al Varney) writes:
>In article <42428@sdcc12.ucsd.edu> svaldez@sdcc13.ucsd.edu (@ocf.berkeley.edu  ) writes:
>   [deleted...]
>>Actually you have two options:
>>
>>15.119 ( I think) - which is the 100mw limit with the maximum
>>feedline, antenna combo of 3 meters...
>>
>>OR
>>
>>15.221 - encourages on-campus broadcasting -- UNLIMITED field
>
>   So how is "campus" defined?  Can a "corporate campus" use this
>sub-section?  How about an "corporate educational campus"?  Just
>thinking....

15.221(b) - ...intentional radiators used for the operation of an 
AM broadcast station on a college or university campus or on the 
campus of any other education institution may comply with the 
following:
>
>   And how about places like Kansas State, where the land is actually
>owned by either the State or by the "Foundation".  K-State owns/controls
>thousands of acres of more-or-less contiguous property near the main
>campus.  The ownership probably alternates frequently -- where does the
>"campus" end?  If the EPA or Kansas Bull Testing Service or some state
>agency owns an island of property in a sea of KSU state-owned property,
>does the rule apply at the borders of such islands?  What if the state or
>other owner agrees to not object to such transmissions?

This is where things are vague.  I guess you could assume that places
designated as being part of the campus (despite ownership) qualify.
The situation is the same here -- on one side of a street we have the
'official campus' and on the other side is land owned by the university
but which is not designated as being a part of campus (they're going
to put up a Ritz-Carlton hotel out there  -* on univ. land! *- )  We
are considering that street the edge of campus.  Remember also that 
these are unlicensed transmissions -- these rules are meant to prevent
interference -- if you do your homework this detail should be trivial. 

svaldez@sdcc13.ucsd.edu
From: mycal@netronix.com (Mycal Johnson)
Newsgroups: alt.radio.pirate
Subject: more fm radio hacking
Distribution: world
Date: Fri, 11 Dec 92 22:57:03 GMT
Organization: Netronix, Inc.



I just built a 350mw amplifier using 2 MRF-901's, runs strait of the
FM-10.   I ran this into a modified PA-1 and got 18 watts!  Well I
don't think you need more than this for a pirate radio.  I will
try to do up the plans for the amp and the mods for the PA-1 in
a little while.  They will have to be stored on the FTP site, since
they will be in postscript.

note : all testing was done into a dummy load.

FM-10    = fm radio broadcast kit by ramsey electronics
PA-1     = 2 meter RF amplifier by ramsey electronics
MRF-901  = UHF RF transistor
350mw    = enough to give you a warm fuzzy feeling
18 watts = enough to give you the hebe-gebe's

mycal

-------------------------------------------------------------------------
Restrictions Suck!  Information is cool.                  |
Ignore info/freedom restrictors is the rule.              |
                                                        // \\
Your Pal Mycal -- mycal@netronix.com                gorilla radio!
From: svaldez@sdcc13.ucsd.edu (@ocf.berkeley.edu  )
Newsgroups: alt.radio.pirate
Subject: Re: Short Range AM transmitter
Date: 16 Dec 92 19:42:32 GMT
Distribution: usa
Organization: University of California, San Diego

In article <1992Dec16.082134.26062@cs.uri.edu> reynhout@cs.uri.edu writes:
>
>   Antennas + transmission line are limited to 10 feet in length.  That is
>the "length of all radiating elements plus the length of the transmission
>line" must not exceed 10ft.  So no interesting antennas are feasible...
>
   That's only for `normal unlicensed' transmissions under 15.219.
If you operate under the unlimited FS on-campus reg -- 15.221 then
there is no limit on antenna size -- but you are suppose to certify
your antenna to the requirements in part 2 subpart J.  

>   On that note, I'd like to see what people think would be the best
>antenna configuration under such constraints.  I've made a few pattern
>tests, but I'm not getting any useful results yet.  The gain on the
>antenna is very unhelpful...being ~1/60 of a wavelength.  (580kHz is
>the only xtal I could find for testing)
>
  Move to a much higher frequency to make antenna building much
easier if possible.  I'm still waiting for my transmitter but it 
looks to be a vertical design about 1/20 wavelength (at 1600kHz).
I'll probably have to boost the output quite a bit though...
Radio Systems sells a design meant for campus transmissions which
has a vertical radiator about 15' high and a base 8' high -- but
these require groundplanes which take up 1600 square feet!  
then you have to remember that these are supposed to go with their
20W transmitters...  How much range are you getting with that setup?

svaldez@sdcc13.ucsd.edu
Newsgroups: alt.radio.pirate
From: brenckle@scsuc.ctstateu.edu (BRENCKLE,NICHOLAS)
Subject: Schools and Radio
News-Software: VAX/VMS VNEWS 1.41    
Organization: Southern Connecticut State University - Computer Center
Date: Tue, 15 Dec 1992 15:56:00 GMT

For all the people looking for transmitters for their school:

Contact Either radio Systems or LBP or some other mfg, installer of school
radio systems. THey will be able to translate all the FCC jargon into exactly
what you can and cannot do in your position. They are alot of help. THe FCC
still remains cyptic as ever with their restrictions. (Most english majors would 
be disgusted at the way they phrase the laws..)

Also try another area school or one within your school system (state?) and 
see what they do.
(A little telephone work upfront will save alot in the end)



Lastly, I went and checked out the Radio Shack VHF/UHF meter and it was
only for a few specific freqs. I found a place that had a general AM/FM 
SWR/Power meter but I forgot to ask the price. 

-Nick
From: svaldez@sdcc13.ucsd.edu (@ocf.berkeley.edu  )
Newsgroups: alt.radio.pirate
Subject: Re: Short Range AM transmitter
Date: 11 Dec 92 20:15:50 GMT
Organization: University of California, San Diego

In article <1992Dec11.052537.15987@netcom.com> ser@netcom.com (Steve Rubin) writes:
>In article <1992Dec11.013605.18403@cobber.cord.edu> serhienk@cobber.cord.edu (David Serhienko) writes:
>>
>>patch it in to the broadcasting hardware.  The admin is not aware of our
>>plan, but an FCC license is not necessary until radius is 2 miles (is that
>>right) and once we have it patched, they will leave it in, we're sure.  They
>
>
>No.. that is a VERY bad idea.  Trust me.  My school's station was just fined $200
>and taken off the air... because we thought wrong..
>
>Im about %99 sure, that the law for unlicensed AM transmitting is
>100mW, into an antenna that is 10feet long, or less.  Included in this
>10 feet is the feedline, and the antenna itself.  
>-- 
Actually you have two options:

15.119 ( I think) - which is the 100mw limit with the maximum
feedline, antenna combo of 3 meters...

OR

15.221 - encourages on-campus broadcasting -- UNLIMITED field
strength on campus -- off-campus spillover has to be pretty low
~15-40uV/meter measured at 30 meters which is very low in power...
There isn't the 3 meter antenna limit and the field strength for
off-campus emissions is dependent on frequency...  Another netter
I've been talking to estimates with a fullsize antenna you can 
cover a 1 mile radius of flat land with a few MICROWATTS...  

Remember -- under these two unlicensed provisions -- you have to
shut down immediately if you create interference.. As mentioned
above -- deal with the bureaucracy it'll save you a lot of grief in
the future.  Not to discourage you but just building a transmitter
and hooking it up is not enough -- there is a bunch of technical 
crap you are going to have to deal with to be 'clean & legal'... 
.
Our station is looking into the same options.... I'm 
going to play around with the Pan-Com/Panaxis 100mW transmitter 
I ordered...  (It's $40 for the kit/plans or just the plans are $10
--a rip considering how much it really costs.  ) I'll consider
putting up a schematic...
From: brewer@anarky.enet.dec.com
Newsgroups: alt.radio.pirate
Subject: SW logging.
Date: 14 Dec 92 01:35:43 GMT
Organization: Digital Equipment Corporation


	WMCR (Magic Carpet Radio) was heard here with nice AM
	signals on Saturday Pm at 7.416 Mhz. Magic Mike was at
	the helm...
Organization: Doctoral student, English, Carnegie Mellon, Pittsburgh, PA
Newsgroups: alt.radio.pirate
Date: Mon, 14 Dec 1992 23:15:36 -0500 
From: Laura D Martz <lm2w+@andrew.cmu.edu>
Subject: Re: Free radios in Hungary

There is also a station called Radio Szokol in Budapest (named for an
old shitty Soviet brand of radios).
If you're in Budapest and are interested in the "underground" scene,
such as it is, try the cafe A on Miksath Kalman Ter. It's about the only
place in town...
Newsgroups: alt.radio.pirate
From: brenckle@scsuc.ctstateu.edu (BRENCKLE,NICHOLAS)
Subject: AM Radio Broadcasting..
News-Software: VAX/VMS VNEWS 1.41    
Organization: Southern Connecticut State University - Computer Center
Date: Sat, 12 Dec 1992 22:27:00 GMT

To the person who was building an AM transmitter for the school:

The new FCC regs allow unlimited broadcasting power on your own campus as long 
as you don't go over into non campus territory at illegal limits. We are 
currently using 6  20watt Radio Systems AM transmitters hooked up in various 
ways (power lines, sewer pipes, I didn't install them but I can say they are all 
hooked up pretty bizzarly..) Anyhow, we are going to replace this with a singal 
transmitter and antenna set up. Total cost for antenna and instillation from
Radio Systems is about $1500. The transmitters are around $500. Definatly check
with someone first. If you want, skip the school beareaucracy and find all this
stuff out yourself first, I did and it saved ALOT of time.

-Nick
BRENCKLE@SCSUC.CTSTATEU.EDU   WOWL 530 AM

Newsgroups: alt.radio.pirate
From: reynhout@cs.uri.edu
Subject: Re: Short Range AM transmitter
Organization: University of Rhode Island, Computer Science Dept.
Distribution: usa
Date: Wed, 16 Dec 1992 08:21:34 GMT

ser@netcom.com (Steve Rubin) writes:
>serhienk@cobber.cord.edu (David Serhienko) writes:
>>patch it in to the broadcasting hardware.  The admin is not aware of our
>>plan, but an FCC license is not necessary until radius is 2 miles (is that
>>right) and once we have it patched, they will leave it in, we're sure.  They
>
>No.. that is a VERY bad idea.  Trust me.  My school's station was just fined
>$200 and taken off the air... because we thought wrong..
>
>Im about %99 sure, that the law for unlicensed AM transmitting is
>100mW, into an antenna that is 10feet long, or less.  Included in this
>10 feet is the feedline, and the antenna itself.

   It's a very simple procedure to look up the Code of Federal Regulations,
Title 47, section 15 for all the information you could possibly want on
the permissibility of unlicensed emissions.  There's no good excuse for
"thinking wrong."
   With that said, of course, I should also note that my photocopies of the
relevant pages are at work, so I can't cite exact wording, but THIS is how
unlicensed emissions in the AM broadcast band work:
   Maximum field strength is measured at a point ?30ft from the radiating
element.  I don't remember the figure for max field strength, because I
haven't gotten that far in my project.
   HOWEVER- in the case of broadcast on the campus of an educational
institution, the field strength is not measured 30ft from the radiating
element, but 30ft from the property line...the entire campus is considered
a big black box, and anything that happens within the campus is not
relevant, so long as your neighbors don't get interference.  Obviously,
this doesn't help schools with city campuses...only ones with large
contiguous masses of property.

   Antennas + transmission line are limited to 10 feet in length.  That is
the "length of all radiating elements plus the length of the transmission
line" must not exceed 10ft.  So no interesting antennas are feasible...

   On that note, I'd like to see what people think would be the best
antenna configuration under such constraints.  I've made a few pattern
tests, but I'm not getting any useful results yet.  The gain on the
antenna is very unhelpful...being ~1/60 of a wavelength.  (580kHz is
the only xtal I could find for testing)

--
   Andrew <reynhout@cs.uri.edu>    "If you remind me of my dog,
                                    we'll probably get along"  -jane siberry
From: mycal@netronix.com (Just Mycal)
Newsgroups: alt.radio.pirate
Subject: FM radio hacking
Distribution: world
Date: Wed, 16 Dec 92 17:57:13 GMT
Organization: Netronix, Inc.


Ok, Ok,

I have been swamped with 'can you mail me the schematics since I can't ftp.'

well anyone whe wants the schematics, board layouts, and other mods
for amps and other FM-10 mods, send me a buck, and I will send you:

the PA-1 conversion mods.
the mrf-901 350mw amp.
a 700mw amp with 30mw driver amp.
a 4 watt amp with 200mw driver amp.

and other neat photo copies of other relivant stuff.

If you have sent me somthing in the past,  just email me you address
and I will send you the packet for free.

I hope a buck isn't to much to ask, but its about what it will cost me
to copy and send it.

mycal


ps. if anyone has the BA1404 spec sheet, I will trade you the above
    packet for a copy.

-------------------------------------------------------------------------
Restrictions Suck!  Information is cool.                  |
Ignore info/freedom restrictors is the rule.              |
                                                        // \\
Your Pal Mycal -- mycal@netronix.com                 pirate radio!
Newsgroups: alt.radio.pirate
From: varney@cbnewsd.cb.att.com (Al Varney)
Subject: Re: Short Range AM transmitter
Organization: AT&T Network Systems, Lisle, IL
Distribution: na
Date: Sat, 19 Dec 1992 21:08:26 GMT

In article <42428@sdcc12.ucsd.edu> svaldez@sdcc13.ucsd.edu (@ocf.berkeley.edu  ) writes:
   [deleted...]
>Actually you have two options:
>
>15.119 ( I think) - which is the 100mw limit with the maximum
>feedline, antenna combo of 3 meters...
>
>OR
>
>15.221 - encourages on-campus broadcasting -- UNLIMITED field
>strength on campus -- off-campus spillover has to be pretty low
>~15-40uV/meter measured at 30 meters which is very low in power...
>There isn't the 3 meter antenna limit and the field strength for
>off-campus emissions is dependent on frequency...  Another netter
>I've been talking to estimates with a fullsize antenna you can 
>cover a 1 mile radius of flat land with a few MICROWATTS...  
>
>Remember -- under these two unlicensed provisions -- you have to
>shut down immediately if you create interference..

   So how is "campus" defined?  Can a "corporate campus" use this
sub-section?  How about an "corporate educational campus"?  Just
thinking....

   And how about places like Kansas State, where the land is actually
owned by either the State or by the "Foundation".  K-State owns/controls
thousands of acres of more-or-less contiguous property near the main
campus.  The ownership probably alternates frequently -- where does the
"campus" end?  If the EPA or Kansas Bull Testing Service or some state
agency owns an island of property in a sea of KSU state-owned property,
does the rule apply at the borders of such islands?  What if the state or
other owner agrees to not object to such transmissions?

  [This is an academic question - KSU has enough licensed transmitters;
they don't need more.  I could look up the CFR at work, but I don't plan
on going back this year! :-)]

Al Varney
From: josephs@msen.com (Joseph Stroup)
Newsgroups: alt.radio.pirate
Subject: FCC Fines
Date: 14 Dec 1992 02:58:04 -0500
Organization: Msen, Inc. -- Ann Arbor, Michigan
Distribution: world
NNTP-Posting-Host: garnet.msen.com

To all of you out there who are considering college radio stations using
low power. CONTACT the FCC. Get it in writing! The FCC has this new and
totally "nuts" policy of fining people $20,000 the MAX! Heck people in
Detroit get off for selling drugs easier. NO, I don't promote selling 
drugs. I also don't promote a government agency (under-funded) at that 
charging $20,000 fines for rule violations. There new kick is those that build
and sell computers. What no FCC approval lalel? Thanks $20K please. Its a
scam. If the agency only would realize that there are those of us who would
be willing to be supportive... I am sick of seeing large corporations get
richer - with special licenses that the ave. person can't get.

Down...off my soap box. Seriously guys, I was really into radio in my
school days and have had a few run ins with the monitoring folks, it just
ain't worth it. They will fine your school and you get ejected. Thats
not so great.

-- 
Joseph Stroup          | Still trying to work
                       | and Play well with Others.
From: wells@hpfcso.FC.HP.COM (John Wells)
Date: Fri, 11 Dec 1992 17:08:39 GMT
Subject: Re: how to get 40-50Mzh on AM/FM reciever????
Organization: Zanzor of the CLOUDS
Newsgroups: alt.radio.pirate

In alt.radio.pirate, dseaman@oread.cc.ukans.edu writes:

> In my school newspaper an articles mentioned that it is possible to
> pick-up cordless radio transmissions on an AM/FM receiver. Does anyone
> know how to do this? I would be most interested.

It depends on if you are close enough to the telephone and if the telephone
has a lot of second harmonic energy comming out and if the FM radio isn't
very well designed to reject out of band signals.  E.G. a poorly designed 
fm radio tunes from 88mhz to 108 mhz and will pick up the second harmonic 
or even the fundimental of 44 thru 54 mhz (and more than likely a lot of 
other frequencys).  

Perhaps the best thing to do is to buy an AM/FM/TV band radio and adjust the 
local oscillator for the ch 2-6 band to tune a bit lower, into the 45 MHZ area.

OR ya could just break down and spend not too much money on one of the cheep
16 channel scanners and program in what ya want to listen to.

For what it is worth.
From: mycal@netronix.com (Mycal Johnson)
Newsgroups: alt.radio.pirate
Subject: Short Range AM transmitter 
Distribution: world
Date: Fri, 11 Dec 92 22:47:06 GMT
Organization: Netronix, Inc.


In article <1992Dec11.052537.15987@netcom.com> ser@netcom.com writes:

  > 
  > Im about %99 sure, that the law for unlicensed AM transmitting is
  > 100mW, into an antenna that is 10feet long, or less.  Included in this
  > 10 feet is the feedline, and the antenna itself.  

this needs to be looked up.  I think that schools are allowed some special
privlidges on the AM broadcast band.

mycal


-------------------------------------------------------------------------
Restrictions Suck!  Information is cool.                  |
Ignore info/freedom restrictors is the rule.              |
                                                        // \\
Your Pal Mycal -- mycal@netronix.com                 pirate radio!
Newsgroups: alt.radio.pirate