Hi Contesters,
As my countryman Nikola Tesla was mentioned in previous 50/60 Hz debate,
I feel obliged to add grain of salt about 3 phase mains supply systems.
Other EU comments pointed that we have either single phase 220V system or 3
phases 3 x 380V. As you may remember from your rotor control boxes, single
phase is not very useful for driving AC motors so a large capacitor is needed
for artificial phase shift simulating second power source. If you have more
than one phase (2 in USA, 3 in EU), this problem does not exist.
Three phase systems are very handy for full wave rectification as they generate
six times input frequency ripple which is much easier to filter with much
smaller capacitors!
Without saying, power carrying capacity is much greater when distributed to
3 wires or 3 transformer cores.
We use 3 x 380V for our 2 x QB5/1750 class C QRO at S50L mountain site!
73 de Mario, S56A, N1YU.
Work : Institute "Jozef Stefan" | Home : Marijan Miletic'
Jamova 39, 61111 Ljubljana | Trebinjska 8, 61113 Ljubljana
Slovenia, Europe | Slovenia, Europe
Tel. : 386-61-1259-199 | 386-61-342-266
Fax : 386-61-1258-058 | 386-61-345-569
Email: Marijan.Miletic@IJS.SI | Radio: S56A, S57MM @ S50BOX; N1YU
>From Robert Penneys <penneys@brahms.udel.edu> Wed Sep 14 13:22:18 1994
From: Robert Penneys <penneys@brahms.udel.edu> (Robert Penneys)
Subject: Need latest pkunzip 2.08
Message-ID: <199409141222.IAA09758@brahms.udel.edu>
I got the uuencoded N6TR log which seems to need PKunzip 2.08 to
unfold. Is this available onqp on the network? Tnx Bob
>From Lau, Zack, KH6CP" <zlau@arrl.org Wed Sep 14 13:22:00 1994
From: Lau, Zack, KH6CP" <zlau@arrl.org (Lau, Zack, KH6CP)
Subject: QRP Portable Score
Message-ID: <2E76EBA9@arrl.org>
ARRL VHF QSO PARTY 1994
Call: KH6CP/1 FN33JC Vermont
BAND QSO QSO PTS GRIDS
50 41 41 16
144 111 111 19
222 45 90 10
432 68 136 13
903 18 54 9
1.2 26 78 11
2.3 10 40 8
3.4 9 36 7
5.7 6 24 4
10G 6 24 4
24G 1 4 1
-----------------------------------
Totals 341 638 102 = 65,076
Highlight--VE2/SM0DFP on 1296 for my 25th grid.
WB1GQR lets me operate in the same parking lot
as their limited-multi (about 50 meters/yards away)
so my VHF/432 totals aren't competitive.
Conditions were average to poor, with the exception
of a little 6 meter E skip before GQR found the opening.
As the score shows, I wasn't able to work any FN20s
besides WA2LTM on microwaves. Having nearly
everything set up at the beginning of the contest really
helps your score (spent several hours last year putting
up/re-erecting blown down antennas....)
.
>From debry@iris1.sb.fsu.edu (Ron Debry) Wed Sep 14 14:46:15 1994
From: debry@iris1.sb.fsu.edu (Ron Debry) (Ron Debry)
Subject: CQWW SSB in or near North Carolina?
Message-ID: <9409141346.AA19951@iris1.sb.fsu.edu>
Hello,
I've recently moved up here to Durham, NC, and I'm looking for a chair
for the CQWW SSB. A multi-op would be the most fun (and I'd learn more
about the local propagation), but if you know of a single-op station
willing to host an op, let me know.
Obviously the closer to Raleigh / Durham the better, but I've been
driving 4 hours every contest to get to N4WW the past few years,
so anything within that radius is fine (although the farther the
drive, the less help I'll be able to offer for antenna / station work
before the contest).
73,
Ron DeBry WA6DGX
debry@bio.fsu.edu (Idon't have a Duke e-mail account yet, but I can
still telnet into this FSU account)
(919) 684-8861 (w)
(919) 544-4480 (h)
>From R.SCHREIBMAIER" <bob@mtdcr.att.com Wed Sep 14 16:02:50 1994
From: R.SCHREIBMAIER" <bob@mtdcr.att.com (R.SCHREIBMAIER)
Subject: Need latest pkunzip 2.08
Message-ID: <9409141502.AA13068@ig1.att.att.com>
> I got the uuencoded N6TR log which seems to need PKunzip 2.08 to
> unfold. Is this available onqp on the network? Tnx Bob
It really needs PKunzip 2.08? PKunzip 2.04g doesn't work?
You might try the free Info-ZIP group's unzip program. That can be
snarfed via anonymous FTP from oak.oakland.edu in the
/pub/msdos/zip directory. Look for unz512x.exe. I assume you've
already uudecoded N6TR log. If not, you can also snarf uuencode
and uudecode from oak.oakland.edu in /pub/msdos/decode. Look for
toaduu20.zip (among others -- lots of implementations out there).
73,
Bob K2PH
--
--------------------------------------------------------
| Bob Schreibmaier K2PH | UUCP: ...!att!mtdcr!bob |
| AT&T Bell Laboratories | Internet: bob@mtdcr.att.com |
| Middletown, N.J. 07748 | ICBM: 40o21'N, 74o8'W |
--------------------------------------------------------
>From Rich K2WR <72407.1262@compuserve.com> Wed Sep 14 17:21:01 1994
From: Rich K2WR <72407.1262@compuserve.com> (Rich K2WR)
Subject: status
Message-ID: <940914162100_72407.1262_FHG53-1@CompuServe.COM>
status
>From Hoeft, Roger V" <rvhoeft@po5.pcmail.ingr.com Wed Sep 14 17:20:00 1994
From: Hoeft, Roger V" <rvhoeft@po5.pcmail.ingr.com (Hoeft, Roger V)
Subject: Questions on 80M Loop
Message-ID: <2E772886@hubsmp1.pcmail.ingr.com>
I recently installed an 80 meter loop such that the loop is up about 50 feet
and roughly horizontal. In the brief time I have worked with the loop, I
have noticed that reception on my roof-mounted HF6V is consistently about 2
S units stronger (albeit noisier) than the loop.
Should this be the case? From what I've read, and recall, signals on the
loop should be somewhat stronger than the vertical. Any help and
suggestions to improve the characteristics of loop would be much
appreciated.
Thanks and 73s (from a BB gun),
****************************************************************************
*****************
Roger Hoeft aka KA9EKJ
Intergraph Corporation - Amateur Radio is a contact sport
Huntsville, AL 35894
rvhoeft@ingr.com - If it not
fastpitch, it ain't softball !!
****************************************************************************
*****************
|