Hello moonbouncers,
There was very nice CW activity during ARRL contest this year (on all bands except 2m from US) and it is unfortunate I did not have a lot of free time for it.
I also “worked” JT65 logger eme (I thought: who is going to find out anyway??) and apart from constant chatter I also found JAMMING.... a lot of Jamming, even from its own creator!!?
Check a small part of it from N0UK logger:
11/19 17:04 VE3KH you being jammed by K1JT and W6YX (W7IUV Larry WA DN07dg 216.215.40.193)
11/19 17:05 Why Larry .... they on 142 also? (VE3KH Kevin ON FN03aj 24.141.203.45)
11/19 17:06 They are calling me to get a contest poitn and it ain't gonna happen!! (W7IUV Larry WA DN07dg 216.215.40.193)
11/19 17:08 Thansk Larry 73 ... Yes, I have been jumped by a quite a few stations (VE3KH Kevin ON FN03aj 24.141.203.45)
11/20 17:47 Also hr k1jt calling me -22 but not ans him (KN4SM/5WL/KW Jerry VA FM16qt 24.241.251.86)
11/20 18:02 Contest = reduced courtesy! (K5DOG/2M Stevedog NM DM52xw 65.127.140.122)
11/20 18:04 Yes, K1JT and W3SZ can hear on gold tooth. (K5DOG/2M Stevedog NM DM52xw 65.127.140.122)
One thing I wouldn’t regret missing on EME is JAMMING!!!
GL 73, Petros SV3AAF
I have this QRO-amplifier for sale but because of the weight and size, only local pickup is possible.
Think ít´s only interesting for amateurs located in Sweden.
It is advertised on:
http://www.dx-radio.se/?an=3402
Lars SM5DCX
Net Notes from 14.345 MHz Saturday 11 Feb 2012 1500Z VE3KRP Eddie eddie(x)tbaytel.net Thunder Bay ONT Worked a couple of stations on SSB during the contest. Some weather issues, wind off the lakes. VE4SA Shawn speters(x)mts.net Working in shack today. Looking to sell 13cm equipment: Spectran 180W Amplifier, 2m-13cm Transverter, G4DDK LNA. Concentrating on 23cm for the time being. Contact him via email for more info. VE4MA/W7 Barry Arizona Working on 5.7 gear. Now has 2m transverter working and expects to have 23cm up and working by next month. WB7QBS glennwb7qbs(x)hotmail.com Sunnyside WA Glenn's email report: There is an artcle in the March QSTthat explains the squirlyness of HF propagation. I hrd U best on my vertical Outbacker.
I have a Sked. with K4EME 432.040, Sun. 2/12/12 1100 Z. May "THE FARADAY" be with us,"hi".
I have "The Most Important Job in theWorld": Preparing 5the Fischer's coffee for the Lutherans
across the street. If I don't hear U in the AM, I will E-Mail U. 73's Glenn WB7QBS (thanks Glenn...sorry the propagation is not with us during the net hours.)
N4PZ n4pz(x)live.com Steve was not able to make it on today but expects to be on tomorrow, Sunday. WB2BYP John storyavenue(x)hotmail.com Presented some recordings of spectrum from last week's 23cm SSB event at Rochester VHF Group with K2DH and W2CNS. Nice CW recording of N4PZ and HB9BBD, 20-30 dB out of the noise. 2012 EME Conference. Info at www.eme2012.com
Thanks, WB2BYP Johnstoryavenue(x)hotmail.com or wb2byp(x)arrl.net
Hi Folks,
I bought this powersupply SNT Emerson BML 231 204/5
It is standard set to 54Vdc output and contains a fiber optical interface.
No further adjustments at all.
Is there any-1 who has experience with this kind of powersupplies and configured it down to 48Vdc?
Met vriendelijke groet,
Jan Pa0PLY
Andy,
Both are feeds used on dishes:
The scalar ring is really a choke ring and used to control RF fields
at the mouth of the horn. It can be used on both septum and
non-septum feeds. Typically, it is needed for dishes < f/d = 0.4
(f/d= focal distance/diameter and is a measure of how deep a dish
is) High f/d ratios require a horn with wider beamwidth (aka less
gain). The VE4MA horn is one that commonly used for
f/d<0.4 "Scalar" choke rings are used on the cylindrical "VE4MA"
dish to cut off sidelobes on the dish pattern by suppressing
radiation on the outside of the mouth of the horn. The basic VE4MA
horn is simply a section of cylindrical wave guide with one end closed.
On 1296 circular polarization is used. For eme the standard is to
transmit in RHCP and receive in LHCP. RH=right hand; LH=left hand
and refers to which direction the RF wave rotates. The easiest way
to visualize it is by thinking of how a nut rotates on a bolt on RH
thread vs LF thread. The reason two senses of CP are required is
that CP is reversed upon reflection from the surface of the Moon.
To generate a circular polarized signal there are two basic methods:
1) using a hybrid to feed two probes inside a horn at right angles to
each other with RF phased by 90-degrees, or
2) using a septum feed horn which has a stepped center plate running
down the middle of a section of waveguide (either square or
cylindrical shape). This plate is called the septum and it separates
two probes inside the horn. One is used for Rx and the other for Tx
and the nature of the septum is that is produces circular
polarization of both senses but opposite at each probe.
There is actually a third method which uses tuned stubes to generate
CP. It is very effective but difficult to properly tune. The
septum's advantage is its simplicity and high efficiency. In the
septum the two polarities are produced without need of external
hybrids (which add loss) and fairly high isolation exists between Rx
and tx (typically 24-dB). This eliminates use of high power TR
relays. One needs typically 60-dB isolation (for power up to 1kW) so
a fairly low-power relay can be used on the Rx port to add isolation
(typically a mw sma relay). e.g. 1000w (+60 dBm) - 24-dB = +36 dBm
(4w). The relay must be able to handle 4w (easy) and have more than
36-dB isolation (also easy). The relay needs very low insertion loss
(not easy).
For dishes like mine with f/d=0.5 higher gain is needed (smaller
beamwidth) to properly illuminate the surface of the dish without
spilling over the edge. This is done with either flared horns (like
I am using) or something called a dual-mode horn.
This is just a simplification of the general issue of dish feeds and
the best tutorial is given by W1GHZ's Microwave Antenna Book (on line).
73, Ed - KL7UW
At 06:15 AM 12/17/2011, Andy Furlong wrote:
>Hi Ed...this is Andy WA2FGK...
>I am a newbie on EME...ABOVE 432 MHz
>I have 500 watts on 1296 out of a DB6NT Amp and a 12 foot dish.
>QUESTION...WHAT IS THE ADVANTAGE of a Septum Feed....vs
>whatever the type of feed is called that has the SCALAR ring?
>
>NOT a newbie to EME as we are on 144 MHz(WAS #163)
>and 222 MHz with 4 x 7W M^2 and have 6 initials off the moon...
>and have worked 432 MHz with 4 18 foot Directive System Antennas,
>but now serious about 'movin-on-up' to 1296 and 2304 Mhz.
>Would appreciate any info on one feed vs the other.
>Thanks and 73
>Andy
>
>
>At 03:30 AM 12/17/2011, you wrote:
>>I don't recall who expressly asked for my measurements so I will
>>put here for all:
>>
>>Test equipment:
>>K3 + 15 dB atten* + DEMI 1296-28HP => Bird43(10K element) =>
>>1w, *needed to reduce output to 1w
>>HP432A + 20 dB coaxial atten (10w)
>>
>>I ran approx 2w into the Septum Tx port (NF) to measure isolation
>>at the Rx port (sma-F):
>>1) Reference level adjusted so HP432 reading +10.0 dBm
>>2) Measured = -12 dBm at Rx port, indicating isolation of 22-dB
>>Adjustment of tuning stubs did not affect the isolation.
>>3) Input SWR ~ 1.5 (previous measurement of SWR with 60w on the
>>dish indicated no measurable SWR) so perhaps may be some reflection
>>inside the room?
>>
>>Next I measured insertion loss and isolation of my sma relay used
>>at the Rx port.
>>1) Reference with +30 dBm (1w) indicated on the Bird43. HP432A
>>read +7.8 dBm (22.2 dB atten: combination of cables+adapters+20 dB atten).
>>2) Output thru the relay plus short .141 jumper = +7.7 dBm
>>indicating insertion loss = 0.1 dB**
>>3) Output on unswitched port of the relay with switched port
>>terminated with 5w sma load was unmeasurable on the lowest setting
>>of HP432 implying better than 37.7 dB isolation.
>>
>>I could have run the transverter up to 25w (+43 dBm) to increase
>>range of the reading of the HP meter but figured relay isolation
>>quite adequate for running 300w into the septum. +24.7 dBm -22dB
>>-37.7dB = -34.9 dBm into the preamp.
>>
>>These measurements were taken with septum off the dish inside the
>>house. Once I have the new feed mount bracket constructed and
>>septum reinstalled these measurements will be repeated to determine
>>effects of reflections from the dish. Placing my hand over the
>>mouth of the septum showed increase power reflected into the Rx
>>port showing lessening of isolation a couple dB as expected.
>>
>>**Measurement accuracy probably not better than 0.1 dB.
>>
>>
>>
>>73, Ed - KL7UW, WD2XSH/45
>>======================================
>>BP40IQ 500 KHz - 10-GHz www.kl7uw.com
>>EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
>>DUBUS Magazine USA Rep dubususa(a)gmail.com
>>======================================
>>
>>_______________________________________________
>>Microwave mailing list
>>microwave(a)lists.valinet.com
>>http://lists.valinet.com/cgi-bin/mailman/listinfo/microwave
>
>
>73, Ed - KL7UW, WD2XSH/45
>======================================
>BP40IQ 500 KHz - 10-GHz www.kl7uw.com
>EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
>DUBUS Magazine USA Rep dubususa(a)gmail.com
>======================================
To: MAP65 users
From: Joe Taylor, K1JT
A new revision of the beta release of MAP65 2.0 has been posted at
http://www.physics.princeton.edu/pulsar/K1JT/MAP65_199r443.exe
If you need instruction about what is different about MAP65 2.0, or how
to install it, go to
http://physics.princeton.edu/pulsar/K1JT/Beta_Release_of_MAP65_2.0.pdf
The main changes in r443 relative to r437 are as follows:
1. Fixed a logical error in assigning "timeout age" of each decode, for
determining colors in the BandMap and Messages windows.
2. Fixed a bug that could sometimes prevent decoding of strong signals.
3. Support for "JT65 v2.0" message formats has been added. (A
description of v2.0 of the JT65 protocol will be announced soon.)
Please keep your reports coming, good or bad!
-- 73, Joe, K1JT
All
G'day
I intend to be QRV on 144MHz this weekend for the DUBUS SSB/CW Contest. I
will be operating in the CW section. SSB is out of my realm at the moment
HI.
On the Sunday, I will have less time as it is my Wedding Anniversary (yep
April Fools day) but should be able to sneak some time in.
Good Luck to all those who will be QRV on 144MHz and 10GHz.
Details here
http://www.marsport.org.uk/dubus/EMEContest2012.pdf
Regards
Wayne
VK5APN
PF95jg
--------------------------------------------------------------------
mail2web.com Enhanced email for the mobile individual based on Microsoft®
Exchange - http://link.mail2web.com/Personal/EnhancedEmail
Hi all,
Just finishing getting my system running again on 3cm.
If all test go OK then I plan to be QRV over the WE as follows:
31/3
0500-0730 z (For NA)
1030 - moonset ~1400 (for Eu)
01/04
NA by sked only
1130 - moonset ~1500 (for Eu)
All operation will be Wx permitting............. I will be around on HB9Q
logger If I am on and QRV
73 all, hope to catch a few on 10 GHz again!
73 Charlie
VK3NX
LNA 0.7dB
70 W at feed
3.7 M dish
Hello EME friends,
Today i worked 2 initials on 6cm
- G3LTF # 5 on sked. Signals from Peter were not very strong but good copy
- K5GW # 6 on random. Gerald had like yesterday when i heard him SUPER strong signals, was moving my S-meter !!! Strongest signals heard on 6cm up to now
I am very pleased with the results, started my 6cm activity on the 25th of March. Have to work on my tracking and power, nice projects for this summer.
73s Jac, PA3DZL
OK Brian and All.
Tell me when to be on Brian and I'll use 1296.030 instead of 1296.020 for wa1zms BUT I will return to 1296.020 for general CQing since that's where I normally hang out.
As soon as my moon is up high enough to clear the trees I will start looking for europeans and will remain active until moonset in europe off and on all day today and tomorrow.
My phone is 1-815-734-4255.
I'm going to bundle up and go out to release the tie down cables now before moon rise.
It's cold at abt 3 degrees C overcast and may rain.
73
Stee N4PZ
Life is not a dress rehearsal. La vida no es un ensayo.
From: wa1zms(a)att.net
To: i1ndp.nando(a)gmail.com; cupido(a)mail.ua.pt; n4pz(a)live.com
Subject: Thanks guys!
Date: Sat, 31 Mar 2012 12:26:59 -0400
Guys-
Thanks for all of your offers to listen for me. I have a local spur on 1296.020(!) so may need to try 1296.030.
I am only running optical pointing at this time and the WX calls for clouds today. Sunday WX is for clear skies.
I also have possible conflict with a family event today around 22:00z today that was unplanned.
I will post on the HB9Q logger if I’m QRV for later today. If not today, then on Sunday I will be in a better position to be QRV.
But an hour later due to change in moon rise time.
I was hoping to be able to quickly add a choke ring to the OK1DFC feed but it looks like I will need a few days to
modify the feed support for the choke. So my RX is poor due to the lack of the choke. I will run without the choke
for now and will start building the new feed support later this week.
As for the EME net: Yes! Steve I will try and make it a point to start showing up. Now that I have at least something
that works for EME. My only HF antenna is 160m dipole at 70ft feed with open wire line. And 2 days ago we had very bad winds
at night and one of the open wire leads snapped off at the dipole feed point. So I’m going to be working on that at some point
this weekend. I also use it as my 600m antenna in a Marconi-T mode and am QRT on that band now as well as HF.
Between work, family, and a major project on a local mountain top to start to relocate all of my FM repeater and beacon antennas
to a new tower so the old one can be removed by crane this week, I’m feeling pressed for time.
And Luis…..yes I know. I should be on 24GHz EME! I have a lead on a 100w TWT for that band and also have had an offer
of a 2.5m offset dish for that band. I just need to convince the XYL that my dish farm can grow in number! But I like 23cm
and since I had a big PA for that band I decided to start there and over time work my way to more bands.
You guys are great! Thanks!
-Brian, WA1ZMS/4 in FM07
