As for the width of the SSB signal, I never touch the stuff.
Mark, WA6OTU
wa6otu@caltech.edu
>From James B. Wolf D611 x4638 MS25-71"
><netwrk!most.magec.com!JBWOLF@uunet.uu.net Thu Jul 7 15:28:12 1994
From: James B. Wolf D611 x4638 MS25-71"
<netwrk!most.magec.com!JBWOLF@uunet.uu.net (James B. Wolf D611 x4638 MS25-71)
Subject: KR9U FD results
Message-ID: <940707092812.e568@most>
Name: James B. Wolf D611 x4638 MS25-71
From: MOST::MRGATE::"MRS::SN_L=HOSTNODE::SN_U=JBWOLF"
To: MOST::INTERNET
Subj: KR9U FD results
From: NAME: Wolf <SN_U=JBWOLF@SN_L=HOSTNODE@MRS@MOST>
To: NAME: INTERNET.MAGNAVOX <INTERNET@MOST@MRGATE@MOST>
DATE : July 7, 1994
TO : M. INTERNET
FROM : J.B. Wolf
SUBJECT : KR9U FD results
SMTP%"cq-contest@tgv.com"
KR9U 1A low power
BAND CW SSB
160 0 0
80 140 0
40 594 278
20 2300
15 14 10
10 0 0
6 9 129
2 5 45
Pkt 46
-------------------------
1038 452 = 1490TOTAL = 5056 + 800 Bonus
Lots of storm noise this year. Had to shut down for almost
1 1/2 hr due to lightning.
Jim, KR9U
James B. Wolf
>From barry@w2up.wells.com (Barry Kutner) Thu Jul 7 12:59:37 1994
From: barry@w2up.wells.com (Barry Kutner) (Barry Kutner)
Subject: Non-contaminating cables?
Message-ID: <32a4oc2w165w@w2up.wells.com>
As long as we're on the subject of burial, etc. - If heard from
(un)reliable sources that when a jacket is called non-contaminating, it
has nothing to do with how well it will stand up under direct burial. I
was told it meant that IF buried, no contaminents (i.e. poisons) will
leech into the surrounding ground, but it will break down.
Comments?
Also, speaking of waterproofing... Does anyone still use coax seal?
73 Barry
--=====================================================================
Barry N. Kutner, W2UP Usenet/Internet: barry@w2up.wells.com
Newtown, PA Packet Radio: W2UP @ WB3JOE.#EPA.PA.USA.NA
Packet Cluster: W2UP >K2TW (FRC)
.......................................................................
>From Henri Molhuizen (PA3DUA)" <DERMA_HM@DERMA.AZN.NL Thu Jul 7 17:08:08 1994
From: Henri Molhuizen (PA3DUA)" <DERMA_HM@DERMA.AZN.NL (Henri Molhuizen
(PA3DUA))
Subject: dx mailing list down???
Message-ID: <01HEFKOGLG1EAAUX91@DERMA.AZN.NL>
Sorry to waste bandwith here, but I tried to (re)subscribe to the dx
mailing list at dx-request@unbc.edu. I never even got a reply however.
According to our system operator never is wrong at this side, and sub-
scribtion to cq-contest was no problem at al. Is this list perhaps down
r
or so??? Could someone please help me???
Thanks in advance!
73 de Henri, PA3DUA
H.Molhuizen@derma.azn.nl
>From Peter G. Smith" <n4zr@netcom.com Thu Jul 7 16:58:54 1994
From: Peter G. Smith" <n4zr@netcom.com (Peter G. Smith)
Subject: Non-contaminating cables?
Message-ID: <Pine.3.89.9407070850.A26026-0100000@netcom>
My understanding of the term was/is that some jacket materials had a bad
habit of gradually leaching into the dielectric, causing gradual increase
in losses , and eventual dielectric breakdown. I don't believe it has
any relevance either for environmental concerns or (except
serendipitously) for tolerance of direct burial.
73, Pete
N4ZR@netcom.com
>From eric%modular.UUCP@cs.arizona.edu (Eric Gustafson) Thu Jul 7 17:34:03
>1994
From: eric%modular.UUCP@cs.arizona.edu (Eric Gustafson) (Eric Gustafson)
Subject: Non-contaminating cables?
Message-ID: <9407071634.AA17432@modular>
Non-contaminating has not much to do with burial at all. It refers to wire
that when exposed to the weather (and in particular UV radiation), won't
contaminate the shield wires with jacket material over time. Wire that is
not non-contaminating has the property that it degrades over time by having
jacket material (or breakdown products of the jacket material) "seep" into
the shield braid. This greatly degrades the shield effectiveness by
insulating the shield wires from one another. If you have ever replaced an
old run of RG8 that was exposed to the weather for a long time, you may
have had occasion to strip the outer jacket back and look at the shield.
If the shield wires were all black instead of shiny copper (or tin or
silver depending on the wire) color, then the wire was NOT
non-contaminating.
73, Eric
>From John D. Allen" <jallen@nectech.com Thu Jul 7 20:37:26 1994
From: John D. Allen" <jallen@nectech.com (John D. Allen)
Subject: The perfect HF tranceiver
Message-ID: <s029+Lg35ia@cs004.nectech.com>
"sellington" <sellington@mail.ssec.wisc.edu> Wrote:
|
| The other negative feature of the 930/940 is the rx phase
| noise. It's quite
| noticable, for example, on 40 CW during a contest when the
| East Coast
| kilowatts are about a zillion dB stronger here in the
| Black Hole than the
| Europeans. Still, it's not nearly as bad as one might
| think from the
| phase noise test results that have been published. I
| added an outboard
| filter box, so I can cascade a 200 Hz cw filter with the
| internal 400 Hz
| one, and I can live with the results.
|
| Of course, the transmitter also has phase noise, but
| that's someone else's
| problem.
John Allen K1FWF Writes: namely, mine. THe several 930/940's around me
are excellent at keeping me at least 2 Khz. away on cw due to their
extreme amount of phase noise. Some mults are lost on S and P each
test to this.
One could argue that, until the last of these
| noisy transmitters
| is gone, it's not going to do much good to have a really
| quiet receiver.
It's OK except during big CW Contests.
Good RX is usefull all the time, especially on the east coast, to
allieviate the intermod from Eu 40M broadcast stations hitting the
front end at +20 or more dbm. (Yes, a good antenna delivers enough
signal to hear with a 1N4004 power diode and a pair of 8 ohm headphones
- only problem is you hear all 20 of them at the same time!)
John Allen K1FWF jallen@nectech.com
|
| Scott Ellington, K9MA
| sellington@mail.ssec.wisc.edu
>From D. Leeson" <0005543629@mcimail.com Thu Jul 7 21:21:00 1994
From: D. Leeson" <0005543629@mcimail.com (D. Leeson)
Subject: Hot Buttered Toast
Message-ID: <70940707202107/0005543629NA2EM@mcimail.com>
I've found that two steps are helpful in sealing coax connectors:
1) Put a generous dab of clear silicone grease in the connecting area before
assembly...wipe off all excess ooze completely
2) Use an inner wrap of "self-vulcanizing splicing tape", either rubber or
silicone, then cover with wraps of Scotch 33 or 88 and Scotchkote. The splice
tape is used, for example, to splice 208v wires down in a well at the motor,
underwater, and it lasts for decades (there are other uses such as HV
transmission splices). This stuff is available at electrical supply stores.
Also, don't hang coax by anything but "chinese finger grabbers" (cable
hangers) that are made to distribute the force. And never, never trust the
crimped connectors that come on preassembled lengths of RG-8 foam, even
Belden.
Andrew recommends polyethylene tape rather than vinyl, but I haven't found
a source. This is gilding the lily, I think, and I prefer heat shrink tubing
for permanent joints, especially if I can find the stuff with meltable goo
inside.
I use the black "Sharpy" markers to write on all cable except black, and for
that I found a white ink marker that does great. I cover the markings with
Scotch mylar tape if I think they are going to be rubbed off. I also use
colored taped to code the various bands for coax, as it seems to save a lot
of time later.
73 de Dave, W6QHS dleeson@mcimail.com
>From D. Leeson" <0005543629@mcimail.com Thu Jul 7 21:29:00 1994
From: D. Leeson" <0005543629@mcimail.com (D. Leeson)
Subject: 205BA design?
Message-ID: <05940707202950/0005543629NA2EM@mcimail.com>
Tom, K1KI inquires about upgrading Hy-Gain designs. In addition to the
"factory" 205CA, here are some higher gain, wider band, better pattern
designs worked out using K6STI's YO. They are not strengthened beyond
100 mi/h, and they are not wind or weight balanced, but they are a good
starting point. I would stay with the standard balanced Hy-Gain boom unless
they really have excessive windmilling.
Here are some element files:
20M534WB Wideband 5 el 20m Yagi on 34' boom (9.44 dB)
Aluminum
13.950 14.175 14.400 MHz
5 elements, inches
2.2900 1.2500 1.1250 0.8750 0.6250 0.4375
0.000 4.0500 40.7500 46.0000 50.5000 24.0000 57.5458
43.000 0.0001 31.2500 46.0000 50.5000 24.0000 55.7446
2.1400 1.2500 1.1250 0.8750 0.6250 0.4375
84.500 2.9250 29.3750 46.0000 50.5000 24.0000 55.0994
218.250 2.9250 29.3750 46.0000 50.5000 24.0000 51.4392
408.250 2.9250 18.0750 46.0000 50.5000 24.0000 50.8308
Wide-band 4 el. 20m on 28' Boom
Aluminum
13.950 14.175 14.400 MHz
4 elements, inches
2.2900 1.2500 1.1250 0.8750 0.6250 0.4375
0.000 4.0500 40.7500 46.0000 50.5000 24.0000 54.4339
84.250 0.0001 31.2500 46.0000 50.5000 24.0000 53.8161
2.1400 1.2500 1.1250 0.8750 0.6250 0.4375
141.250 2.9250 29.3750 46.0000 50.5000 24.0000 52.4807
307.250 2.9250 18.3750 46.0000 50.5000 24.0000 52.6518
15M526 Yagi on 26' boom. wide band
Aluminum
20.950 21.225 21.500 MHz
5 elements, inches
2.1400 0.8750 0.5360 0.4380
0.000 2.9250 78.5000 2.6250 62.3315
27.000 0.0001 66.7500 2.6250 67.1634
1.5800 0.8750 0.5360 0.4375
65.000 2.8000 66.8750 2.6250 64.8744
172.000 2.8000 66.8750 2.6250 62.3180
309.000 2.8000 66.8750 2.6250 55.2716
Hope these are of interest. I've had great luck with a 2-el inverted vee
that has tips closer than centers to get the right coupling for front-to-
back. I use this at 70' on 40m for stateside contests, and it seems to work
very well.
73 de Dave, W6QHS dleeson@mcimail.com
>From Bruce Herrick <bdh@mixcom.mixcom.com> Thu Jul 7 21:57:30 1994
From: Bruce Herrick <bdh@mixcom.mixcom.com> (Bruce Herrick)
Subject: 3-500Z Tubes
Message-ID: <199407072057.PAA10863@mixcom.mixcom.com>
I seem to remember an article a long time ago (in the NCJ, I think)
regarding the relative strengths/weaknesses of Amperex vs. Eimac 3-500Z
tubes. Anyone remember any details? My application is at 50 MHz.
Please email me directly.
Thanks & 73, Bruce WW1M
--
Bruce D. Herrick bdh@mixcom.com Home: 414.462.1270
Pryon Corporation Office: 414.253.5678
N93 W14575 Whittaker Way Fax: 414.253.2772
Menomonee Falls, WI 53051 PacketCluster: WW1M > NB9C
>From Trey Garlough <GARLOUGH@TGV.COM> Thu Jul 7 22:34:09 1994
From: Trey Garlough <GARLOUGH@TGV.COM> (Trey Garlough)
Subject: dx mailing list down???
Message-ID: <773616849.854841.GARLOUGH@TGV.COM>
> Sorry to waste bandwith here, but I tried to (re)subscribe to the dx
> mailing list at dx-request@unbc.edu. I never even got a reply however.
> According to our system operator never is wrong at this side, and sub-
> scribtion to cq-contest was no problem at al. Is this list perhaps down
> or so??? Could someone please help me???
If you were going to make a broadcast to a mailing list asking about the
status of dx-request@unbc.edu, a better place to ask your question would
be dx@unbc.edu.
--Trey, WN4KKN/6
>From Jim Reisert AD1C 07-Jul-1994 1816 <reisert@wrksys.enet.dec.com> Thu Jul
> 7 23:16:29 1994
From: Jim Reisert AD1C 07-Jul-1994 1816 <reisert@wrksys.enet.dec.com> (Jim
Reisert AD1C 07-Jul-1994 1816)
Subject: Silicone grease in connectors (was RE: Hot Buttered Toast)
Message-ID: <9407072216.AA04979@us4rmc.pko.dec.com>
Dave W6QHS wrote:
>I've found that two steps are helpful in sealing coax connectors:
>1) Put a generous dab of clear silicone grease in the connecting area before
>assembly...wipe off all excess ooze completely
Don't do this above 50 MHz. W1JR had several N connectors blow out because
the silicone grease was vaporized.
- Jim AD1C
>From George Cutsogeorge <0006354141@mcimail.com> Thu Jul 7 23:35:00 1994
From: George Cutsogeorge <0006354141@mcimail.com> (George Cutsogeorge)
Subject: Coax Cable
Message-ID: <51940707223515/0006354141PK1EM@mcimail.com>
The older cables, such as RG-8/U, have a plasticizer added
to the jacket to improve flexibility. This is called a Class I
PVC and has a life of 2 years.
Noncontaminating jackets are called Class 2A and include
RG-213/U and RG-58C/U and they have a life of 15 years from
the date of manufacture.
The plasticizer migrates through the shield and into the
inner insulation. The net effect is an increase in
attenuation. Also, the shield gets discolored and is
difficult to solder to. The effect is not related to burial
and I believe either type can be burried with out changing
their life. As a matter of fact some coax that I have had
out in the sun for 10 or more years has had cracks appear in
the jacket. It's a good policy to check the cable
attenuation periodically and replace it if an increase is
noted. This is easy with a 2 meter xmtr and a wattmeter
which is used to measure the power going in and coming out
of the coax.
George, W2VJN.
>From Lyndon Nerenberg <lyndon@unbc.edu> Fri Jul 8 00:08:03 1994
From: Lyndon Nerenberg <lyndon@unbc.edu> (Lyndon Nerenberg)
Subject: dx mailing list down???
Message-ID: <Pine.3.87.9407071603.D27047-0100000@unbc.edu>
> Sorry to waste bandwith here, but I tried to (re)subscribe to the dx
> mailing list at dx-request@unbc.edu. I never even got a reply however.
No, it's not down. I'm just really busy right now so requests are backlogged.
--lyndon
|