HDTenEightyP/NetNews huggingface dataset:
Newsgroups: rec.radio.shortwave
Subject: Re: Ramsey SW Converter Kit
From: emd@ham.almanac.bc.ca
Date: Sat, 09 Jan 93 21:11:32 PST
Distribution: world
Organization: Robert Smits

franzis@evax.gdc.com writes:

> 
> Robert Smits Writes: 
> 
> 
> >The only problem with some digital radios is that they tune in 10KHz 
> >steps, while you often fins SW stations are at 5KHz intervals. It's no 
> >big problem, just use two crystals in the converter - one 5KHz away from 
> >the other, and switch from one to the other to cover the entire range of 
> >frequencies you're interested in.
> 
>    I thought maybe this converter would work like one of those
>    FM Converters I used to use, where the converter would do the 
>    tuning and broadcast it on one frequency on your AM radio.
>    Do you actually have to use the radio to tune through the SW
>    range? How do you know where you are tuning?
> 
>                         Thanks.
>    franzis@evax.gdc.com
>    
Well, for example, the Oak Hills converter I use in my car converts the 
range 9,550 KHz to 10,600 KHz down to the range 550 KHz to 1,600 KHz. 

To tune, I just mentally add 9,000 KHz to what's shown on the dial. You 
can do the same thing with other bands by choosing the appropriate 
crystal frequency.

FM converters work differently because they not only have to convert 
frequencies from FM broadcast, they also have to convert modes. They do 
this by demodulating the FM signal, and using the recovered audio to 
modulate a carrier signal that you tune in on your AM car radio. 

The problem with using digital radios together with shortwave converters 
is that the digital radios usually operate in 10 KHz steps, thus missing 
all the stations in between. Adding a second crystal offset from the 
first by 5 KHz would allow me two ranges:

9,550 - 10,600 KHz converted to 550 KHz - 1600 KHz, and
9,555 - 10,605 KHz converted to 550 KHz - 1600 KHz.

So, if I tune the first range with a digital radio operating in 10 KHz 
steps, I'll be able to hear all the stations between 9,550 and 10,600 KHz 
at 10 KHz intervals. Similarly, by using the second crystal, I'll be able 
to listen to all the stations between 9,555 and 10,605 KHz at 10 KHz 
intervals. Thus, by adding a second crystal and a toggle switch, you CAN 
use a digital radio and a cheap shortwave converter for a fairly good 
receiver. 

Course, some of us find it easier to glom onto an old AM radio someone 
has discarded BECAUSE it's not digital, FM, etc, add a power supply and a 
converter, and voila! - for thirty bucks you've got a reasonably good SW 
receiver.



Robert Smits  VE7EMD Ladysmith B.C. 
Ph (604) 245-2553 e-mail: emd@ham.almanac.bc.ca 
PACKET VE7EMD@VE7KIT.#VANC.BC.CAN.NA                             

                                         
Newsgroups: rec.radio.shortwave
From: Bamin@novell.com (Baber Amin)
Subject: What is Daily Solar Geophysical data
Organization: Novell NPD
Distribution: usa
Date: Mon, 4 Jan 1993 17:31:18 GMT

Hi, I am new to this and would like to know what is the Daily Solar 
Geophysical data?  How I might use it?  What things can it be used for and 
how to interpret it?  Any help would be welcome

Thanks

Baber
Newsgroups: rec.radio.shortwave
From: martin@datacomm.ucc.okstate.edu (Martin McCormick)
Subject: Re: American Commercial Shortwave Broadcasting
Organization: Oklahoma State University, Stillwater, OK
Distribution: na
Date: Mon, 11 Jan 1993 14:20:32 GMT

In article <1993Jan11.045958.22317@ringer.cs.utsa.edu> sbooth@lonestar.utsa.edu (Simon E. Booth) writes:
>>Commercial HF broadcasting is definatly legal in the USA. In fact, that's
>>the only place privatly owned shortwave station are legal. Just a for

There are loads of them in Latin America.

>>instance, that's what we do here! The restriction is that we are *NOT*
>>allowed to target the USA as an audience. There is a minimum power
>>requirement of 50 KW also, so the investment is pretty substantial. There
>>are fees every six months for frequency coordination also. It's not
>>something you can undertake as a hobby, but there are a couple of low
>>budget groups with dedicated support that do an adequate job of remaining
>>on the air.
>
>I never knew that American SW stations were prohibited from targeting
>US listeners.  I seem to pick them up just fine, here in Texas :-).
>
>Seriously, why is there this restriction?
>
>Simon
>


It is my understanding that only the Voice of America is restricted from
targetting U.S. listeners.  The reasoning might seem a little strange, today,
but it probably stems from a good idea.  Congress drafted that restriction
in the fourties when the VOA was established to avoide the possibility of
a radio station or network owned and operated by the U.S. government which
would push the party line, as it were, down the ghroats of the people as
is sometimes done in totalitarian states.

	Remember what was happening when this charter was drafted.
Our country did lots of things, then, which are hard to understand, today.

Martin McCormick WB5AGZ   Stillwater, OK
O.S.U. Computer Center Data Communications Group
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Newsgroups: rec.radio.shortwave
Date:         Fri, 8 Jan 1993 11:47:00 -0800
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From:         SYSMGR@CBOS.UC.EDU
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>I have some questions about shortwave broadcasting...

>What is the feasability of making commercial broadcasts over shortwave in the
>USA?  Is it legal?  Are there any commercial stations in the US?  What is the
>investment required to establish a station that could be easily heard with a
>radius of 100 miles, for example?


Commercial HF broadcasting is definatly legal in the USA. In fact, that's
the only place privatly owned shortwave station are legal. Just a for
instance, that's what we do here! The restriction is that we are *NOT*
allowed to target the USA as an audience. There is a minimum power
requirement of 50 KW also, so the investment is pretty substantial. There
are fees every six months for frequency coordination also. It's not
something you can undertake as a hobby, but there are a couple of low
budget groups with dedicated support that do an adequate job of remaining
on the air.

Michael
--
Michael Batchelor--Systems/Operations Engineer #compliments and complaints
WSHB - An International Broadcast Station of   #   letterbox@csms.com
       Herald Broadcasting Syndicate, Inc.     #technical questions and reports
michaelb@wshb.csms.com         +1 803 625 5552 #   letterbox-tech@csms.com
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Date:         Fri, 8 Jan 1993 01:31:00 -0800
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Robert Smits Writes:


>The only problem with some digital radios is that they tune in 10KHz
>steps, while you often fins SW stations are at 5KHz intervals. It's no
>big problem, just use two crystals in the converter - one 5KHz away from
>the other, and switch from one to the other to cover the entire range of
>frequencies you're interested in.

   I thought maybe this converter would work like one of those
   FM Converters I used to use, where the converter would do the
   tuning and broadcast it on one frequency on your AM radio.
   Do you actually have to use the radio to tune through the SW
   range? How do you know where you are tuning?

                        Thanks.
   franzis@evax.gdc.com
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Date:         Fri, 8 Jan 1993 03:01:00 -0800
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In rec.radio.shortwave randall@informix.com (Randall Rhea) writes:

>franzis@evax.gdc.com writes:
>>        Does anyone out there have or know anything about the
>>        Ramsey shortwave converter kit ? I believe it sells for
>>        about $30.00.


>This enables an AM radio to receive shortwave.  I don't believe that it
>works on radios that have digital readouts, so I did not get one.

OK, I'll bite.  If the Ramsey is a simple down-converter that mixes the
frequency band of interest into the MW region, why would the type of readout
on your MW radio make a difference?


----------------------------------------------------------------------------
Shrikant Ranade                                          sranade@cup.hp.com
----------------------------------------------------------------------------
From: wmartin@STL-06SIMA.ARMY.MIL (Will Martin)
Newsgroups: rec.radio.shortwave
Subject: Re:  Any information on new Yaesu FRG-100 ?
Date: 5 Jan 1993 10:05:15 -0600
Organization: UTexas Mail-to-News Gateway
NNTP-Posting-Host: cs.utexas.edu

I, too, have been looking for info on this fabled FRG-100. Nothing about it
anywhere yet -- maybe the new WRTH will have some data; we'll see when my
pre-pub ordered copy comes in a week or so... But the strange thing is that
none of the 1993 catalogs have any pictures or pre-availability 
announcements, even a photo of a mockup. Yaesu has been of no help --
their ads in SWL publications only show a ham transceiver, not any
of their SWL receiver line!!! I wonder why they do that... 

Is anybody going to offer a discount price on the new WRTH equipment
guide book? I had been hoping to see pre-publication offers for it
the way some firms do for the WRTH itself, but have seen no such ads.

Regards, Will
wmartin@st-louis-emh2.army.mil OR wmartin@stl-06sima.army.mil
From: andrew@rentec.com (Andrew Mullhaupt)
Newsgroups: rec.radio.shortwave
Subject: Re: John Peel show on BBC World Service
Date: 10 Jan 93 15:56:21 GMT
Organization: Renaissance Technologies Corp., Setauket, NY.

In article <1993Jan9.052911.8563@magnus.acs.ohio-state.edu> jlaird@magnus.acs.ohio-state.edu (James P Laird) writes:
>In article <1993Jan7.004406.22837@beaver.cs.washington.edu> karty@cs.washington
>.edu (Richard Karty) writes:
>>Does anyone know the time and frequency of the John Peel show on the
>>BBC World Service?

>Isn't that "A jolly good show"?  I wonder if he is still in that
>green studio?

I'm sure this is charming, but the host of 'jolly good show' is David Lee
Travis, usually styled D.L.T. The John Peel show takes itself slightly
more seriously. It's somewhere to the left of Tommy Vance in the BBC 
musico-political spectrum.

Later,
Andrew Mullhaupt
Newsgroups: rec.radio.shortwave
From: DPALIK@CCIT.ARIZONA.EDU
Subject: NRD 525 wanted
Date: 05 Jan 1993 13:14:55 -0700 (MST)
X-Received: by usenet.pa.dec.com; id AA25167; Tue, 5 Jan 93 12:15:24 -0800
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 <01GT5SVHH1O08WWKM4@CCIT.ARIZONA.EDU>; Tue, 5 Jan 1993 13:14:55 MST
X-To: rec.radio.shortwave.usenet
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I would like to buy a used NRD 525 receiver.  If you have one that you 
would consider selling, please send me a message.
Thanks.    --- Don Palik           dpalik@ccit.arizona.edu
Newsgroups: rec.radio.shortwave
From: martin@datacomm.ucc.okstate.edu (Martin McCormick)
Subject: Re: RICV radio (for the blind) - need info
Organization: Oklahoma State University, Stillwater, OK
Date: Mon, 4 Jan 1993 14:30:18 GMT


The question is asked whether something can be done to correct the problem
of crosstalk between the main and sub channels in a SCA system.
	A good antenna, of course, will minimize multipath and deliver the
strongest practical signal to your receiver.  The best SCA receivers also
have lots of filtering between the 67 or 92KHZ detectors and discriminator to
get rid of as much crosstalk as possible and also should have excellent
AM rejection in the SCA detector since that is another source of crosstalk.
	The facts are that it is really easy to produce a lousy SCA signal
and there are lots of reasons to do so.  The main one is that radio stations
are only allowed to take up 150KHZ of spectrum space on the dial.  The SCA
signal, stereo subcarriers, main channel audio, and anything else the
broadcaster wants to put on to his signal are all additive.  Most stations
want to have a good loud signal so that people will stop and listen to them
as they tune across the dial.  If they are running SCA on that station,
the engineer must choose between lots of main channel modulation or deviation
and a weak SCA signal or more SCA signal and less main program audio.  Guess
which one wins out.  There are also minimum program levels which the FCC
says must exist in order to have quality audio.  The bottom line is that an
SCA receiver's detector circuit is always looking at a very hostile world.
There is the desired signal, alright, plus maybe another SCA signal just
above or below that one, plus lots of wide-band garbage from the main channel
and stereo subcarriers.  This garbage is about 10 times stronger than the
desired signal so it is no wonder that SCA receivers have always been a 
bit tricky to design well.

Martin McCormick WB5AGZ   Stillwater, OK
O.S.U. Computer Center Data Communications Group
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Newsgroups: rec.radio.shortwave
Date:         Thu, 7 Jan 1993 23:42:00 -0800
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From:         SYSMGR@CBOS.UC.EDU
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Daniel Romanchik asks:

>Anyone know what's happening with R. Czechoslovakia?  It looks like

I listened to R. Prague International on 7345 Jan. 1st. 18-1900 UTC in
eng and french, and at 2200 UTC on 6055. It did not sound as though they
were dancing in the streets over the dissolution of Czechoslovakia; mostly
they played "The Moldau" from Smetana's _Ma Vlast_. They said that a new R.
Slovakia Intl would come into being. Presumably this will be from
Bratislava.

As to what the new country is called, I heard Czechia on Radio Moscow; R.
Prague calls it The Czech Republic.

Bill

--
William Merrill
wmerrill@ikaros.harvard.edu
From: georges@yang.earlham.edu
Newsgroups: rec.radio.shortwave
Subject: Re:  Any information on new Yaesu FRG-100 ?
Date: 7 Jan 93 20:49:51 GMT
Organization: Earlham College, Richmond, Indiana

In article <9301051605.AA23932@cs.utexas.edu>, wmartin@STL-06SIMA.ARMY.MIL (Will Martin) writes:
> I, too, have been looking for info on this fabled FRG-100. Nothing about it
> anywhere yet -- maybe the new WRTH will have some data; we'll see when my

The new WRTH *does* have a fairly lengthy review with a good many details.

--GARS
Newsgroups: rec.radio.shortwave
From: mma001@cbnewsg.cb.att.com (mohammad.m.assami)
Subject: Info on Able receivers.
Keywords: information able receiver mideast
Organization: AT&T
Date: Thu, 7 Jan 1993 21:54:45 GMT


Hi there,

I am yet another beginner, I would appreciate information on the 
least expensive receivers able to pickup Middle East shortwave stations.
I am in the Chicago land area and have an old Sony ICF-7600AW but it
rarely pickup a middle east country.

Any recommendation! Thanks in advance.

Mohammad Assami
Newsgroups: rec.radio.shortwave,soc.culture.czecho-slovak
From: danr@ais.org (Daniel Romanchik)
Subject: Re: What's Happening With Radio Czechoslovakia?
Organization: UMCC
Date: Tue, 5 Jan 1993 01:29:44 GMT

In article <otruba.101.725817139@mitre.org> otruba@mitre.org (Steve Otruba) writes:
>In article <C03tE3.801@ais.org> danr@ais.org (Daniel Romanchik) writes:
>
>>Anyone know what's happening with R. Czechoslovakia?  
>
>Radio Czechoslovakia was on for their regular broadcast at 4:00 UTC
>31 December on 5930.  According to their report they will be 
>changing names to Radio Prague once again.  

I finally did catch them.  They've been very weak here for the last
week or so.  To add insult to injury, WWCR has just cranked up on
5935, all but burying them.  :(

73, Dan Romanchik
Newsgroups: rec.radio.shortwave
From: carter@cmptrc.lonestar.org (Carter Bennett)
Subject: Re: If your new braces receive radio broadcasts...
Date: Tue, 12 Jan 1993 16:10:07 GMT
Organization: CompuTrac Inc., Richardson TX

In article <m0nBSIw-00002hC@bootes.cus.cam.ac.uk> rcj10@cus.cam.ac.uk (Craig Jamieson) writes:
>>Alien tip #2: If your new braces receive radio broadcasts in the range
>>of 5.77314 to 5.77317 kHz, remove them IMMEDIATELY, even if it costs
>>you all your teeth.  Then call the UFO Task Force.  DO NOT INFORM THE
>>U.S. GOVERNMENT -- they probably already know about it.
>
>Are you suggesting that one can pick up alien transmissions on an AM radio?
>My walkman here beside me picks up from 5.3 to 16 kHz (I believe).
>Just tuned down there.  Nothing there... :}
>[text deleted]

Careful, Craig!

   Check those figures a little closer.  Chances are that Walkman is tunable
from 530 to 1600 kHz.

   Besides, 5.7 kHz is not generally classified as "radio," though it's 
possible (dare I say "likely") that someone has tried using it for that.
Mind you, the bandwidth of the signal is likely to splatter outside this
0.03 Hz band!

   For those of a technical interest, this band can readily be received using
a quarter-wavelength antenna hooked to a common audio speaker (note that 5 kHz
is well within the human hearing range).  It is approximately the fourth F
above middle C on a badly-tuned piano.

   Be sure and cut the antenna a little long (about 13 kilometers) and trim to
correct length with a dip-meter.  ;-)

Happy DXing!

-- 
Carter R. Bennett, Jr. - Scientist | "Oh my God!  I _AM_ a nerd!!!"
carter@scilab.lonestar.org - home  | - C. Bennett, Sept 25, 1992, after
carter@cmptrc.lonestar.org - work  | realizing he had been talking about
KI5SR          | "market availability of preconfigured Toll-House cookies."
Newsgroups: rec.radio.shortwave
From: abed@venus.wustl.edu (Abed M. Hammoud)
Subject: Re:      grove and the wrtvh
Organization: Washington University, ESSRL
Date: Thu, 7 Jan 1993 22:02:19 GMT

Could some one please post the phone number for grove..

Thanks, 

+-------------------------------------------------+-----------------------+
|Abed M. Hammoud (KB0INX)			  | abed@saturn.wustl.edu |
|Washington University.				  | Office:               |
|Electronic Systems & Signals Research Laboratory.| -Voice:(314) 935-7547 |
|Department of Electrical/Biomedical Engineering. | -FAX:  (314) 935-4842 |
|Campus Box 1161, One Brookings Drive.		  |			  |
|St. Louis, MO , 63130 USA			  |                       |
+-------------------------------------------------+-----------------------+


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Date:         Fri, 8 Jan 1993 00:11:00 -0800
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Regarding the recent discussion of SSB and whether music can be heard on
it, and also for those who wish to hone their BFO tuning skills. . .

HCJB has an SSB channel on the upper side band of 21455. WRTH says this is
24 hours a day. I've heard it at various times in English:16-1700 UTC, 2240
UTC Saturday (DX Party Line). The SSB signal received little interference
from R. Portugal on adjacent 21450. Compared to HCJB's AM outlet heard at
the same time on 17790 there was little fading, though the latter frequency
had better fidelity - I assume because the signal was more powerful.

Also I heard them yesterday  (1/5) with SSB on 17490 from 15-1700 UTC.
Music sounded fine on both SSB channels, but the BFO has to be right on the
money - which is not always the case as the DX440's BFO is a tad drifty.

Bill

--
William Merrill
wmerrill@ikaros.harvard.edu
Newsgroups: rec.radio.shortwave,rec.radio.info
From: chris@bclwn.wn.bcl.co.nz (Chris Mackerell)
Subject: Re: address for KCBI
Organization: Business Computers Ltd, Wellington, New Zealand
Date: Tue, 05 Jan 1993 16:18:50 GMT
X-Newsreader: Tin 1.1 PL4

klg@panda.mc.duke.edu (Kim Greer -- rjj) writes:
: 
:   Does anyone have a valid street address for KCBI in Dallas?  The USPS says
: that "Dallas, TX 75221" is insufficient.  Thanks.
: 

The NZ DX Times says:

	KCBI Shortwave
	22720 SE 410th St
	Enamclaw
	WA 98002


: kg
: 
: -- 
: Kim L. Greer                       
: Duke University Medical Center		 klg@orion.mc.duke.edu
: Div. Nuclear Medicine  POB 3949		 voice: 919-681-5894
: Durham, NC 27710  		         fax: 919-681-5636
-- 
    _     _
 / /_) / /   / /  / Chris Mackerell <chris@bcl.co.nz> [a/h chris@owdjim.gen.nz]
/ /_) / /_  / /_ /  Ph: +64 (4) 801-6716  Fax: +64 (4) 385-2752
Business Computers Ltd, Box 3236, Wellington 6000, NEW ZEALAND.
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Has anyone heard anything more from Radio Luxemburg which was on 15350 KhZ?
Their English service was supposed to have been tekan off the air on the
30th of december. I think a German station was going to take over. Does
anyone know the fate of this station?

                                        Mark Wilkerson
                                    Eastern Kentucky University
Newsgroups: rec.radio.shortwave
From: schuster@panix.com (Michael Schuster)
Subject: Re: More Syncronous Detection Questions
Organization: Panix Public Access Internet & Unix, NYC
Date: Fri, 8 Jan 1993 15:46:58 GMT

In article <1993Jan7.213817.1@engvms.unl.edu> tmrdpsrs@engvms.unl.edu writes:
>	I have been reading the posts about synchronous detection and (with my
>very limited knowledge of the subject) it seems that it is an automatic form of
>Exalted Carrier Selectable Sideband (ECSS) reception.  My question is: what
>does one gain from synchro detection except having the radio automatically
>pick out the best sideband???  There must be more to it than that because I can
>manually choose between upper and lower sideband and decide which sounds best!
>What else am I missing????

The essential part of synchronous reception is that the receiver 
phase-locks to the incoming carrier, and then discrads it - replacing it
with a stable internally-generated one.

Whether it uses a single sideband, or both, is up to the manufacturer
for a specific implementation. And synchronous detection in sideband
mode does not imply "automatically picking out the best sideband".
It doesn't.
 



-- 
_______________________________Mike Schuster________________________________
NY Pub. Access UNIX/Internet: schuster@panix.com | 70346.1745@CompuServe.COM
The Portal (R) System: schuster@shell.portal.com | MCI Mail,GEnie: MSCHUSTER
From: klg@panda.mc.duke.edu (Kim Greer -- rjj)
Newsgroups: rec.radio.shortwave
Subject: Re: grove and the wrtvh
Date: 6 Jan 93 13:18:15 GMT
Organization: Duke University, Nuclear Medicine

In article <SWL-L%93010522562869@OHSTVMA.ACS.OHIO-STATE.EDU> kirk baxter <KB06810@UKANVM.BITNET> writes:

>Has anyone that put in a pre-pub order with Grove gotten their
>Handbook?  Just wondering, since Grove has had my money for 2 months.
>kgb....

  Yes - mine arrived Monday 1-4-93.

kg


-- 
Kim L. Greer                       
Duke University Medical Center		 klg@orion.mc.duke.edu
Div. Nuclear Medicine  POB 3949		 voice: 919-681-5894
Durham, NC 27710  		         fax: 919-681-5636