QRZ! Ham Radio 4/QRZ Ham Radio Callsign Database - Volume 4.iso/digests/digital/940203.txt

Internet Message Format | 1994-11-13 | 14KB

Date: Tue, 21 Jun 94 04:30:27 PDT
From: Ham-Digital Mailing List and Newsgroup <[e-mail]>
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Subject: Ham-Digital Digest V94 #203
To: Ham-Digital


Ham-Digital Digest          Tue, 21 Jun 94       Volume 94 : Issue  203

Today's Topics:
                          Baycom and TCP/IP
                       DRSI HF Modem?? (2 msgs)
                     finding the freq of an xtal
                       GTOR evaluation/update?
                        HAM/PACKET MODEM FAQ?
                       Info Wanted - paKet 6.0
                        MFJ 1274 - Info wanted
                Railroad track as an antenna? (2 msgs)
                       SoundBoard scope program
                WA8DED rom wanted gor v2.6 need higher

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Archives of past issues of the Ham-Digital Digest are available
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We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party.  Your mileage may vary.  So there.
----------------------------------------------------------------------

Date: 20 Jun 1994 20:07:54 GMT
From: ihnp4.ucsd.edu!sdd.hp.com!spool.mu.edu!howland.reston.ans.net!cs.utexas.edu!convex!news.duke.edu!godot.cc.duq.edu!newsfeed.pitt.edu!dsinc!netnews.upenn.edu![e-mail]
Subject: Baycom and TCP/IP
To: [e-mail]

I am looking for anyone who has successfully enstalled Baycom modem with
AX.25 and NOS.  I cannot get the software to work.  I do not know whether
it is the AUTOEXEC.NOS file, or the commands I am using.

Thanks

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

Date: 20 Jun 1994 13:01:00 GMT
From: ihnp4.ucsd.edu!library.ucla.edu!agate!spool.mu.edu!torn!news.unb.ca!nbt.nbnet.nb.ca!mockler.nbnet.nb.ca![e-mail]
Subject: DRSI HF Modem??
To: [e-mail]

I have a DRSI Type 2 and a DRSI Type 1 in my 386, which runs a
packetcluster node. I find that the HF modem does a very poor
job. At one time I owned a PK-232 and it could copy just
about anything. The DRSI HF modem seems to have real problems.
Has anyone else beside me actually bought one of these? If so,
how do you find that it works? de Rick VE9HF.

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

Date: 20 Jun 1994 13:02:37 GMT
From: ihnp4.ucsd.edu!library.ucla.edu!agate!howland.reston.ans.net!spool.mu.edu!torn!news.unb.ca!nbt.nbnet.nb.ca!mockler.nbnet.nb.ca![e-mail]
Subject: DRSI HF Modem??
To: [e-mail]

In article <[e-mail]> [e-mail] (Mockler Allen & Dixon) writes:
>From: [e-mail] (Mockler Allen & Dixon)
>Subject: DRSI HF Modem??
>Date: 20 Jun 1994 13:01:00 GMT
>I have a DRSI Type 2 and a DRSI Type 1 in my 386, which runs a
>packetcluster node. I find that the HF modem does a very poor
>job. At one time I owned a PK-232 and it could copy just
>about anything. The DRSI HF modem seems to have real problems.
>Has anyone else beside me actually bought one of these? If so,
>how do you find that it works? de Rick VE9HF.

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

Date: Mon, 20 Jun 1994 14:07:17 GMT
From: ihnp4.ucsd.edu!library.ucla.edu!europa.eng.gtefsd.com!gatech!usenet.ins.cwru.edu!nshore!seastar![e-mail]
Subject: finding the freq of an xtal
To: [e-mail]

As quoted from <2u0mk4$[e-mail]> by [e-mail] (Acsys Inc.):

>
> I have a xtal of unknown value (~8.7mhz) that I need to find the exact
> frequency of.  What is the best way to do this?  I do have a frequency
> counter, sho should I build a xtal osc and use the coutner?  How bout
> a simple osc made out of cmos parts like the 4011?  If so what would
> be a good schematic to use to do this?  I need to be quite accurate.
>
> thanx,
>
> mycal

   What are you going to do with the crystal?  If you'll be using it
in an oscilator and you need it to be accurately measured, build the
oscillator (see TTL databooks for a good circuit) and measure that.
If you're using it for a crystal filter, you more likely need the
series resonant frequency (the TTL oscillator is parallel-resonant,
and typically a few kilohertz higher in frequency, and changes with
varying capacitance).  Series resonant can best be had by using a
signal generator and an oscope.  If this is what you need, write me
for details (won't waste bandwidth this way).

--
While (its_not_working())                            John Welch, N9JZW
  mess_with_it();                                    [e-mail]

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

Date: 20 Jun 1994 20:21:15 GMT
From: newsgw.mentorg.com!hpbab33.mentorg.com!wv.mentorg.com![e-mail]
Subject: GTOR evaluation/update?
To: [e-mail]

In article <[e-mail]>, [e-mail] (hamilton on BIX) writes:
|> [e-mail] (Roger Buffington) writes:
|>
|> >I'd be interested in hearing about your evaluations of GTOR versus Clover
|> >or Pactor.  How is this new mode working out?
|>
|> I also would be interested in hearing reports from those who've tried
|> these different protocols.  But I must say, from the evidence in front
|> of me, it looks like Clover, available only in the IBM PC plug-in board
|> from HAL, is going to have a miserable time against a protocol available
|> in a standard outboard TNC unless its technical advantages are just
|> overwhelming.

Well ... to date that has been the case:
CLOVER far outperforms any other protocol on HF.

   ...  Hank

--

Hank Oredson @ Mentor Graphics             Library Operations
Internet     : [e-mail]    "Parts 'R Us!"
Amateur Radio: [e-mail]

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

Date: 20 Jun 1994 20:15:51 -0300
From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!spool.mu.edu!news.cs.indiana.edu!nstn.ns.ca!halifax-24-2.nstn.ns.ca![e-mail]
Subject: HAM/PACKET MODEM FAQ?
To: [e-mail]

I'm looking for information about packet modems that work over VHF/HF radio.
Is there a FAQ for rec.radio.amateur? Any information you happen to have
would be greatly appreciated.

Drew

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

Date: Mon, 20 Jun 1994 16:19:52 GMT
From: ihnp4.ucsd.edu!usc!nic-nac.CSU.net!charnel.ecst.csuchico.edu!olivea!news.bu.edu!gw1!nntpa!lena![e-mail]
Subject: Info Wanted - paKet 6.0
To: [e-mail]

I am looking for information on the latest release of a packet terminal
program called paKet. Does anyone know of a ftp site or land line BBS
that has this new version?


John, WB3ESS [e-mail]

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

Date: Mon, 20 Jun 1994 11:23:14 +0000
From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!pipex!uknet!demon!oiiag.demon.co.uk![e-mail]
Subject: MFJ 1274 - Info wanted
To: [e-mail]

I have recently bought an MFJ1274 TNC.  All working well.  But thought
that it should have MAIL facility. I couldn't find anything in the
User Manual that referenced MAIL (having scanned it several times).

Eventually, while in QSO with a friend, he suggested trying to type
'MAIL ON'.  Suprise - suprise, it accepted it and presumably enable
the mail system.  Why is such an important feature undocumented ?

However - I am new to packet and in need of advice as to how to use
my TNC's mailbox, e.g reading it!  Can anyone please enlighten me ?

The specification on the box and when the TNC powers up, is that it
supports FAX and BPL (what's BPL??).  Does anyone know how to use
these from the MFJ1274.  I have a couple of FAX progs, e.g. JVFAX
and WEFAX, but not sure whether I can use this TNC with these progs.

Would be very grateful for ANY info - especially any other undocumented
command !


Life used to be so simple with a morse key !!!!

--
Ian Gillingham (G0FLB)

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

Date: 20 Jun 94 12:59:48 GMT
From: ihnp4.ucsd.edu!agate!spool.mu.edu!bloom-beacon.mit.edu!crl.dec.com!crl.dec.com!random!nntpd.lkg.dec.com!cimcad.enet.dec.com![e-mail]
Subject: Railroad track as an antenna?
To: [e-mail]

In article <2u2rkq$[e-mail]>, [e-mail] (Tim Rumph) writes...
>STORM JAMES ([e-mail]) wrote:
>: I have heard a legend that a college radio station (either at MIT, Tufts,
>: or Swarthmore) welded antenna to railroad tracks, and peeved the FCC by
>: broadcasting nationwide.  Is this true?  If anyone knows, please email me
>: (or post here)  If you do know, could you please direct me to some
>: documentation regarding this legend if you can.

>I don't think that this would be useful for the frequencies used for
>comericial radio, but the Pensylvania RR did use inductive train phones
>that used low frequency signal passed through the rail.
    The trainphone system was basically a huge air core transformer, using
    existing line side wire (including catenary, where present) and the
    rails to form the coil.  The frequencies were in the 30-50KHz regions.

>The antennas looked like hand rails on top of the cars and locos.  This worked
>very well for the trains, but the equipment was not at all portable,
    "walkie talkies" with antennas as 4 foot dia hoops (to be carried strung
    over the shoulder) were tried.  Not popular with crews.  Useful
    installations on locos, cabees (errrr_cabins_) and wayside.

> and propigation away from the tracks was very poor.
    A feature.  RR business stayed private.

thanks
dave pierson            |the facts, as accurately as i can manage,
Digital Equipment Corporation    |the opinions, my own.
200 Forest St            |I am the NRA.
Marlboro, Mass 01751        |[e-mail]
"He has read everything, and, to his credit, written nothing."  A J Raffles

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

Date: 20 Jun 1994 15:55:07 GMT
From: ihnp4.ucsd.edu!library.ucla.edu!europa.eng.gtefsd.com!howland.reston.ans.net!noc.near.net!sunfish.hi.com!brainiac.hi.com![e-mail]
Subject: Railroad track as an antenna?
To: [e-mail]

In article <[e-mail]>, [e-mail] (Jerome
Kaidor) wrote:
> ***** Actually, as I remember it, typical practice is to use a separate inductive loop
> under the track.  Seems that there's something about trains that can cause a large
> inductance change when they pass overhead :-).

Actually, it's the other way around; signals from the inductive loop under
the track are picked-up by a small coil mounted on the locomotive. This
system feeds the block-occupancy information from the track circuit to
relay-logic on the locomotive. The signal indication is relayed in the cab
of the locomotive. If the engineer does not acknowlege the signal
indication (by pushing lever) and respond appropriately (by observing the
appropriate seed restriction for the signal indication), the logic applies
the emergency brakes.

This system and variants were a result of a federal regulation (ICC or FRA
- I forget) that allowed higher speeds if such automatic safeguards were
implemented.

Steve Byan                                  internet: [e-mail]
Hitachi Computer Products (America), Inc.
1601 Trapelo Road                           phone: [phone]
Waltham, MA 02154                           FAX: [phone]

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

Date: Mon, 20 Jun 94 11:32:54 PDT
From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!gatech!asuvax!chnews![e-mail]
Subject: SoundBoard scope program
To: [e-mail]

Can anyone tell me where I can obtain a Microsoft Windows 5Mhz Oscilloscope
program that will run on my PCⁿs sound board which supports stereo right/left
channel input to display a lissajous pattern?

The reason I'm looking for this type of program, so I can attach my sound
boardⁿs input, to my PK232 TNCⁿs mark/space output, for tuning digital signals
on the HF bands. Updates need to occur at a minimum of 2 seconds to make tuning
functional, and the oscilloscope display Windows needs to be scaleable in size.

Tom WB7ASR...

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

Date: Mon, 20 Jun 1994 11:11:55 GMT
From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!pipex!uknet!EU.net!sun4nl!news.nic.surfnet.nl!tuegate.tue.nl!Carla.diensten.hse.nl![e-mail]
Subject: WA8DED rom wanted gor v2.6 need higher
To: [e-mail]

Hello,

I have a tnc2 with a rom that contains wa8ded v2.6 and tapr 1.1.7.
I have discovered that the software has some disavantages.
Example:

when receiving frame 2 and 4 the tnc sends a RR3 (receiver is ready to
receive frame 3). after frame 3 has arrived it sends a RR4. But frame 4 is
has already arrived correctly. The tnc should have send a RR5 (ready fore
frame 5).

The software that I use with my baycom modem does this correctly. It saves a
lot of bandwith because correct frames aren't transmitted again.

I asume that this function is already built in in newer version of wa8ded
hostmode software. I have version 2.6 at the moment but I have read postings
of people talking about 6.6.4.

My quest is the search of this new software.
Where can I find romimages of this new software or where can I buy it??
(btw. I live in the netherlands europe, so obscure stores in singapore are
out of the question. unless the have internet access).

More information about wa8ded is also very nice I got a document that talks
about v0.91 and I use v2.6 so there is probably a great difference.

jan verhoeven

[e-mail]
or
[e-mail]  (yes that's my home computer via an internet-
packet gateway).

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

End of Ham-Digital Digest V94 #203
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