First, thanks to all that responded to my query on the various
interfaces. I am waiting on some of those I contacted for
info on their specific products. In the meantime, I built the
one described in the Feb. '93 QST. Works like a champ!! But...
I don't care for having the additional power supply to run it.
Does anyone know where one might find a schematic for an
interface that gets its power from the computer. I understand
that by inserting 3 diodes between selected lines on the
computer and the voltage regulator input on the interface circuit
that sufficient voltage is available. I do not know which pins or
if additional modifications are necessary. Can anyone help me
with this?
Thanks in advance,
73 KC5DVT Wayne email...ehayes@vnet.ibm.com
Austin, Texas
>From n6ig@netcom.com (Jim Pratt) Tue Apr 18 20:52:39 1995
From: n6ig@netcom.com (Jim Pratt) (Jim Pratt)
Subject: SS Results/logs
Message-ID: <199504181952.MAA21718@netcom17.netcom.com>
Hello all...
1) I got many direct replies regarding my comment about getting a "return
receipt" for electronically submitted contest logs to the League. In my
note, I mentioned their BBS; I have not sent a log via internet, as I
only recently got an account with direct access. But, the overwhelming
response what that logs submitted via internet DO get a return receipt
soon after they are sent. Good show! I will try that next time...
2) I got my May QST yesterday...and my Sacramento Valley CW HP SO
certificate. Either the QST was really late (this is the normal time we
on the "left coast" get our magazines), or the certificates were really
early. I suspect the latter. Great job...
3) Sorry, no Poission D'Avril score to post, I accidentally sent it in with
my tax forms. Gee, I hope that doesn't lead to an audit! Perhaps just a
bigger refund. But, judging from some of the political policies being
discussed in the various forums these days, my score summary will fit
right in...
73, Jim N6IG
>From fish@crl.com (Bill Fisher, KM9P Concentric Systems, Inc.) Tue Apr 18
>21:09:34 1995
From: fish@crl.com (Bill Fisher, KM9P Concentric Systems, Inc.) (Bill Fisher,
KM9P Concentric Systems, Inc.)
Subject: CATV Hardline Question Summary
Message-ID: <199504182009.AA11345@mail.crl.com>
Responses have stopped coming in...
Several people asked about good ways for making connectors for CATV
hardline. Can someone that has some good ideas post something?
> I have a ton of 75 ohm CATV hardline I am using at the new place. Some of
> the 1/2" stuff doesn't have the jacket on it and in the process of bending
> it through the tower and other things - dimples have developed in places.
> Should I be concerned?
---
from the desk of N6TR:
Naw. The impedance discontinuity is so small in wavelengths that it
won't affect things. It gives you a little extra capacitance so the
impedance is lower at that point. Imagine a 45 Ohm matching section that
is 1/1500th of a wavelength long (1 CM at 15 meters).
---
from the desk of KH6BZF
Bill:
Watch some of the dimples as you will obtain "perturbations in
impedance" if the center conductor and the outer shield are disturbed.
The use of a TDR (Time-Domain Reflectometer) will confirm if you have
a problem with that in use, or TDR the remaining "ton" of hardline to
check which is the best.
Generally, the manufacture will specify the minimum bending radius.
Anything less presents problems. That's from 42-years of experiences
in Radio Transmission Engineering....but I'm still learning! You too?
I use a 1/2 wave coax from the antenna to a "barrel" to insert
the SWR bridge to check the mono-bander. The SWR bridge belongs, in my
mind, at the antenna for checking and tuning. However, this is a
practical approach. The 1/2-wave coax length depends on the velocity
factor(Vf). The Higher the Vf, the longer the antenna-to-barrel
breakout point, the longer the length. I believe my math is correst!
---
> Should I worry about water in it?
>From N6TR:
I have not seen much problem with water migration. I think the foam is
pretty good in this respect. I always cut a foot off (of course, you
already thought of that). I haven't ever seen anything looking like
water damage there.
---
>From K8LX:
One of the prime design requirements of CATV coax is that it not
accept water under any circumstance.
1) The foam (or in some cases, fused disc polyethelene) will not itself soak
up water.
2) The dielectric is glued to the smooth shield; no chance for ingress
between the two.
3) And lo and behold, the center conductor is smooth and glued to the
dielectric also.
What you have here is the perfect coax, in my opinion. I use the 3/4" stuff
almost exclusively.
Of course, it must be handled carefully when you install it. Kinks would
bother me; but if the kink does not overheat at full power, you are probably OK.
---
from K4XU/9 /blackhole /QRP /T92 /ect..
Not to worry. CATV hardline has closed cell foam and thus cannot wick
water like the braid in flexible coax. As long as you do not kink the
hardline so badly that the inner shorts to the jacket, you should be
OK even on 10M at the power you are running.
---
---
Bill Fisher, KM9P - Concentric Systems, Inc.
>From norf@euronet.nl (Rob_Snieder_PA3ERC) Tue Apr 18 21:35:02 1995
From: norf@euronet.nl (Rob_Snieder_PA3ERC) (Rob_Snieder_PA3ERC)
Subject: RTTY Controllers
Message-ID: <199504182035.WAA03075@mail.euronet.nl>
Hi guys, I currently use a PK232 with WF1B RTTY Contest software. I'm not so
happy with this controller because of the poor filters, when it is realy
busy it only writes crap. I have also worked with a PTC Pactor controller
which supports also RTTY and I must say that this worked 100% better, but
this controller does not support packet radio, so I'm thinking about a PK900
from EAE. I like to know what your experience is with RTTY controllers, what
is the best you can buy which is also supported by WF1B? I hope to hear soon
from you, 73 de Rob PA3ERC
Rob Snieder
HAM Radio callsign PA3ERC
>From H. L. Serra" <hlserra@teetot.acusd.edu Tue Apr 18 21:33:33 1995
From: H. L. Serra" <hlserra@teetot.acusd.edu (H. L. Serra)
Subject: DX Proficiency Filter
Message-ID: <Pine.3.89.9504181139.A9582-0100000@teetot.acusd.edu>
Re K0OD's question about the ethics of DXpedition stations sending a
cryptic "87" to direct the proficient to the right listening frequency
(Bouvet Split Technique), I don't think there is any question of ethics.
Just as DX stations handling pile-ups use a "signal-strength filter"
(i.e., peel off the strongest signals first, so you can work the weaker
sigs without interference), what's wrong with using a "proficiency filter"
of higher code speed to indicate where you will listen, especially when
the pile-up is uncontrollable and all over the band? I hope it's not
"unethical" for us to call CQ in the foreign portion of the 40M phone
band and say only "Two Three Zero" rather than "Listening Two Three Zero."
73, Larry N6AZE (6E2T team member)
>From H. L. Serra" <hlserra@teetot.acusd.edu Tue Apr 18 21:33:33 1995
From: H. L. Serra" <hlserra@teetot.acusd.edu (H. L. Serra)
Subject: DX Proficiency Filter
Message-ID: <Pine.3.89.9504181139.A9582-0100000@teetot.acusd.edu>
Re K0OD's question about the ethics of DXpedition stations sending a
cryptic "87" to direct the proficient to the right listening frequency
(Bouvet Split Technique), I don't think there is any question of ethics.
Just as DX stations handling pile-ups use a "signal-strength filter"
(i.e., peel off the strongest signals first, so you can work the weaker
sigs without interference), what's wrong with using a "proficiency filter"
of higher code speed to indicate where you will listen, especially when
the pile-up is uncontrollable and all over the band? I hope it's not
"unethical" for us to call CQ in the foreign portion of the 40M phone
band and say only "Two Three Zero" rather than "Listening Two Three Zero."
73, Larry N6AZE (6E2T team member)
>From jreid@aloha.net (Jim Reid) Tue Apr 18 22:00:48 1995
From: jreid@aloha.net (Jim Reid) (Jim Reid)
Subject: Vanity Call Confusion
Message-ID: <m0s1KNi-000uaKC@hookomo>
>Return-Path: <jhennessee@arrl.org>
>From: "Hennessee, John, KJ4KB" <jhennessee@arrl.org>
>To: Jim Reid <jreid@aloha.net>
>Cc: "Wyatt, Brad (Pacific Dir)" <5016932@mcimail.com>
>Subject: RE: Vanity Call Confusion
>Encoding: 97 TEXT
>
>
>Hi Jim,
>
>It is because of amateurs like you who live off the mainland that ARRL asked
>the FCC to restrict amateurs seeking vanity calls to their call sign region
>of residency. Brad Wyatt, your ARRL Director, was instrumental in
>convincing the ARRL Board of Directors that reconsideration was necessary on
>that one small point and that any amateur shouldn't be eligible for any
>call. In the Report and Order, the FCC essentially said that if a person
>really wanted a particular call, a PO Box could be obtained in the desired
>region. ARRL maintains that amateurs should be restricted to their home
>call sign region and that the traditional call sign system should be
>preserved. It has been my own personal observation that the majority of
>amateurs agree with the ARRL Petition for Partial Reconsideration in this
>matter. 73.
>
>
>John C. Hennessee, KJ4KB
>Regulatory Information Specialist
>ARRL HQ
>Internet: jhennessee@arrl.org
>
>
> ----------
>From: Jim Reid
>To: jhennessee
>Subject: Vanity Call Confusion
>
>Hi John,
>
>I am sure I saw a posting here on the internet a few weeks ago which
>described
>some new call assignments which were going to become available for both
>Alaska and Hawaii. I believe Alaska was to pick up calls such as KL8, KL9,
>and so forth, and Hawaii was to be assigned KH7, since all the KH6 calls
>had
>long been gone. My basic question is, Are these new designators exclusive
>to
>Hawaii and Alaska, or under the new Vanity Call system, will hams
>stateside, who
>becomes aware of this change, be able to receive these prefix's?
>
>I have spent a lot of time searching the Call Book to locate long abandoned
>KH6 calls, KH6 by 1 or by 2, that I might pick up to replace the AH6 call
>I
>was assignes a few years ago when I retired and upgraded to Extra.
>Now it seems, I may have competition for these calls from mainland
>amateurs!
>
>Would obviously be interested in the new KH7 prefix for Hawaii hams, as if
>I were
>to act quickly when Gate 2 opens, I ought to be able to obtain one of the
>26
>new KH7 by 1 calls! Am particularly interested in KH7K, because of my
>QTH here
>on Kauai, and it is both a good SSB and CW call for DX operation. But,
>am sure
>I read in the same posting back awhile ago, that KH7 was to be reserved
>for
>Kure Island hams, of whom there are now none! Of course that is moot, if
>the
>FCC really means anyone who is licensed by the FCC, which includes quite a
>spread of folks and calls across the Western Hemisphere, ie from Guam,
>Saipan,(both
>around 145E), American Samoa, and extending all the way to Puerto Rico
>(about 64W)!
>
>If that is the FCC's intent, no one neither in the US nor DX will have any
>
>idea in a few years
>where over half the world a W, K, or N prefix may be! I had better check
>and see if the
>American Samon call KH8K is going to be available; of course, one of the
>new Alaskan
>KL8K, KL9K etc. would probably be available. Can just list them all on
>the new
>610-V and send it in when Gate 2 opens, and see what happens.
>
>I have seen of the ARRL's petition to the FCC to restrict new Vanity Calls
>to the
>call district of the applicants address; but assume the FCC will counter
>with the
>argument that anyone, if he really wanted to, could get a Hawaiian PO Box
>address (at which most Hawaiians receive there mail) and apply as a
>resident
>of the Hawaiian Islands
>
>I certainly hope the FCC reconsiders this situation before throwing the
>flood gates
>wide open!
>
>Thanks for reading this!
>73 and Aloha,
>Jim Reid, AH6NB (Happily retired on the Island of Kauai)
>Hawaii, USA Email: jreid@aloha.net
>
>
73 and Aloha,
Jim Reid, AH6NB (Happily retired on the Island of Kauai)
Hawaii, USA Email: jreid@aloha.net
>From engberg@ctis.af.mil (Bob Engberg) Tue Apr 18 16:22:46 1995
From: engberg@ctis.af.mil (Bob Engberg) (Bob Engberg)
Subject: Alaska - "L"
Message-ID: <9504182322.AA26553@edfue0.ctis.af.mil>
So I can sign K0MVL/L instead of K0MVL/KL7
Or should I sign K0MVL/KL0?
Or KL0/K0MVL
Or L/K0MVL
Or K0MVL/KL
Or KL/K0MVL
Hmmmm.
The WPX is end of May. This will be fun.
Bob Engberg
phone: 907-552-1895
e-mail: engberg@ctis.af.mil or K0MVL@amsat.org
URL: http://www.ctis.af.mil/~engberg/
packet: K0MVL@KL7AA.#NAK.AK.USA.NOAM
snail: SAIC Attn: Bob Engberg
911 W. 8th Ave., Suite 401
Anchorage, AK 99501
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