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PA2AGA > HDDIG 05.12.99 20:08l 218 Lines 6800 Bytes #-9660 (0) @ EU
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Subject: HamDigitalDigest 99/307A
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Ham-Digital Digest Tue, 30 Nov 99 Volume 99 : Issue 307
Today's Topics:
Clover and Pactor II
Computer RF noise in HF SSB
JNOS vs TNOS?? (2 msgs)
Kenwood TS-570D and Kam (6 msgs)
looking for Kam+ owners
PTC2e on the route...
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We trust that readers are intelligent enough to realize that all text
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Loop-Detect: Ham-Digital:99/307
----------------------------------------------------------------------
Date: Sun, 28 Nov 1999 15:33:09 -0500
From: "Rob" <NoEmail@NoWay.com>
Subject: Clover and Pactor II
There would appear to be more people using PACTOR II than CLOVER. (A lot of
the winlink stations use Pactor II)
Also, many people say that PACTOR II is a better, more robust mode than
CLOVER.
I have a SCS PTC II -- PACTOR II is by far the best mode I have ever used.
It is better than my KAM's GTOR by a long shot!
(But I have never tried CLOVER)
73's
Rob
"Bob Lewis" <aa4pb@erols.com> wrote in message
news:81rqc8$7ii$1@autumn.news.rcn.net...
> Check out http://www.scs-ptc.com for Pactor II modems. Check out
> http://www.halcomm.com/ for Clover modems. I don't believe there are
> any other mfgs. of modems for these two modes.
>
> boboevale <boboevale@dada.it> wrote in message
> news:38413f33.0@news.dada.it...
> > I have a kam plus. I' m interested in clover and pactor II modes.
> Which
> > modem do I need? Thanks .
> > 73 de IZ4BFC.
> >
> >
>
>
>.
------------------------------
Date: Tue, 23 Nov 1999 07:02:38 -0800
From: Patricia Gibbons <wa6ube@ix.netcom.com>
Subject: Computer RF noise in HF SSB
Since your description seems to be power-supply related, can you
arrange a method to power the laptop from a DC source ?? Even if
the external "wall-wart/desk-wart" may have an AC output
(Mine is 15 vac), if you can get your hands on the tech manual
for your computer, you may find that there is an in-built rectifier
for the AC from the desk-wart.
I run mine right off of 13.8 volts DC and that cleared 95% of the QRN.
All that is left is radiation from the LCD screen, but if I dont hold
my hand next to it, the rfi will be lower ..
anyway, just a thought..
be sure to verify if external DC will be acceptable with YOUR computer
before trying this method.. !!
Trish
--
Patricia E. Gibbons
Acting Chief Communications Technician
City of San Jose - ITD/communications
<http://www.qrz.com/callsign.html?callsign=wa6ube>
.......................................
My Public Key is available at:
<http://pgp5.ai.mit.edu:11371/pks/lookup?op=vindex&search=0xEDECB44F>
Key ID: 0xEDECB44F
Robert Cook wrote:
>
> All,
>
> Perhaps someone will have a suggestion re a noise problem I have with my
> Toshiba Computer used in an HF E-mail configuration. The computer is a
> Toshiba Tecra 500 CDT computer. I have begun using it in conjunction
> with an Icom 728. Other system components are a dipole antenna and a
> Kantronics Kam Plus TNC. .
>
> The problem is that the computer puts out a lot of RF noise, significant
> enough to interfere with reception, at various freqs primarily in 7 and
> 8 mhz bands, ie from about 6.0 mhz through to about 9.0 mhz. I have done
> some preliminary testing and have tried some fixes but so far still have
> problem. I have just posted an inquiry with one of the Toshiba
> Authorized Service Centers and am awaiting a reply.
>
> There is a law which this computer is supposed to comply with which says
> that a device may not cause such interference. It is FCC Part 15. The
> FCC's Rule 15 compliance ID number is CJ6UK333. The decal on the bottom
> of the unit references the law and
> the FCC ID number.
>
> 1. Noise seems to be generated by CPU or internal power supply, ???,
> (80%?), but LCD screen adds (20%?).
>
> 2. Freqs of major interferrence seem to be spaced at roughly 110 khz, ie
> 7070, 7180, 7290, 7400, 7510, etc.
>
> 3. Noise is stopped if computer is turned off or put in "suspend" mode
> and powered down
>
> 4. Noise is significantly reduced, (perhaps acceptable), at freqs lower
> than 6.0 mhz, and higher than 9 mhz
>
> 5. Have tried grounding computer chassis to TNC and to Icom 728. This
> helps reduce noise by 5-10%
>
> 6. Have tried ferrite chokes / cable clamps on data caple and computer
> 110 vac cord. Effect is negligible
>
> 7. Have tried unplugging 110 vac power cord. Effect is dramatic. Much
> reduced noise, 80-90%.
>
> 8. I have seen somewhere where someone suggested trying rf bypass caps
> to bleed off RF. Where ?????
>
> 9. I have not tried but heard than using a 500 hz filter may help with
> noise or SNR, ?????
>
> Thanks for any suggestions, a reference elsewhere, or for forwarding my
> request for help to somone experience in the area.
>
> Bob
This key is RSA, NOT Diffie-Hellman !!
>.
------------------------------
Date: Tue, 23 Nov 1999 06:20:12 -0600
From: "Charles Brabham" <n5pvl@texoma.net>
Subject: JNOS vs TNOS??
Rob <NoEmail@NoWay.com> wrote in message
news:Ohk_3.192841$5r2.444085@tor-nn1.netcom.ca...
>
> Which is the best version of NOS for DOS or Windows 98?? Is there any
> consensus out there in the HAM world??
TNOS is no longer supported or being developed.
--
73 DE Charles Brabham, N5PVL
N5PVL @ N5PVL.#NTX.TX.USA.NOAM
http://www.texoma.net/~n5pvl
>.
------------------------------
Date: Tue, 23 Nov 1999 09:50:03 -0500
From: "Rob" <NoEmail@NoWay.com>
Subject: JNOS vs TNOS??
I still see that TNOS has a web site. But perhaps the development is dead!
But my question still remains -- what do you think is better -- JNOS or
TNOS?? Which has more features?? Which is more reliable?? etc
73's
Rob
"Charles Brabham" <n5pvl@texoma.net> wrote in message
news:81e53f01b2p@enews4.newsguy.com...
>
> Rob <NoEmail@NoWay.com> wrote in message
> news:Ohk_3.192841$5r2.444085@tor-nn1.netcom.ca...
To be continued in digest: hd_99_307B
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