Re: Hifer RY back on air
RY Good copy in MI around 16Z. Using HP 3586C, 20M Ground Plane antenna @ 20 feet, & ARGO software.
73,
T.
tube type vlf/mf receivers for sale
Posted by dave sampson on June 03, 2007 at 08:20:20.
hello
would like to sell RBM receiver(200kc-2mc)w/built in power sup., aligned, new caps, works-$200 Medfers GA, HI, NC, & RY Good Copy MI
RBM receiver w/original matching pwr sup excellent cosmetic cond. as is $200
Collins 476J-1 vlf selective volt meter w/manual excellent cosmetic cond. as is $200. pictures avail able upon request.
Posted by T.Kennedy on June 03, 2007 at 13:47:11.
Despite thundershowers HIFER beacons GA, HI, NC and RY all good copy this morning in Michigan. Using HP 3586C Selective Voltmeter, Ground Plane at 20 feet, and ARGO software. 73, T.
Re: Medfers GA, HI, NC, & RY Good Copy MI
Posted by John Andrews, W1TAG on June 03, 2007 at 15:36:03.
In reply to Medfers GA, HI, NC, & RY Good Copy MI posted by T.Kennedy on June 03, 2007
Thanks for the reports on RY. It's running from a temporary antenna, and the signal should be better after next weekend.
John Andrews, W1TAG Re: tube type vlf/mf receivers for sale
Posted by Art Heft on June 04, 2007 at 05:46:15.
In reply to tube type vlf/mf receivers for sale posted by dave sampson on June 03, 2007
Would be interested in your RBM receiver for cash or have Rycom 6041 in excellent condition with full documentation for trading material. Call me at 810-240-3247. Re: ICOM R-75 opinions
Thanx,
Art
Posted by Don Moth W2MPK on June 06, 2007 at 13:54:55.
In reply to Re: ICOM R-75 opinions posted by John Andrews on May 04, 2007
What are these options for the R75 receiver QRSS in AM DX Test
R75-OR4
R75A-PHX2
What is the difference between the R75 and the R75A. Can't seem to find that info and am interested in purchasing one and return to LOWFER'ing
Thanks Don "MPK 178.6 khz
Posted by Phil C on June 07, 2007 at 22:42:08.
Here is a first: an AM DX test that will use a typical lowfer communications mode.
KXTO 1550 AM, Reno, NV will be running a DX test at TOH/BOH 12:00-4:00 AM Pacific, Sun 1 July through Sun 15 July 2007. Power will be boosted to day levels (2500 watts) on July 14 and 15 only, otherwise night power (96 watts) will be used.
A unique feature of the KXTO test is that it will transmit "KXTO" in QRSS at 2.5 kHz audio, which is very slow speed Morse code where a dot is 3 minutes long. Through the use of free spectrum analysis software (Argo from weaksignals.com is suggested) and a sound card, even a very weak 96 watt signal might be decoded at a great distance. More information on this test is given at the website http://www.dxtests.info.
VLF receiver search
Posted by Andy on June 08, 2007 at 10:50:14.
I'm looking for a WR-3 receiver but can't find one, I've been to the auoral chorus site and looks like hes stopped taking orders, can anyone assist? Thanks in advance. Re: VLF receiver search
Posted by Warren K2ORS/WD2XGJ/WD2XSH/23/WE2XEB/2 on June 08, 2007 at 12:30:42.
In reply to VLF receiver search posted by Andy on June 08, 2007
Hi Andy,
I don't know where to find the WR-3, but there are functionally equivalent units available from Ten-Tec (model 1252):
http://radio.tentec.com/kits/Fun
LF Engineering L-600s:
http://www.lfengineering.com/products.htm
And North Country Radio:
http://www.northcountryradio.com/
73 & GL!
Warren K2ORS
WD2XGJ
WD2XSH/23
WE2XEB/2
Re: VLF receiver search
Posted by lloyd chastant on June 08, 2007 at 17:03:18.
In reply to VLF receiver search posted by Andy on June 08, 2007
Andy you might also look at the NASA Inspire site
http://image.gsfc.nasa.gov/poetry/inspire/
at the VLF-3 unit. SAQ Operation 01 July 2007
de Lloyd W3NF
Posted by John Andrews, W1TAG on June 15, 2007 at 04:02:46.
The following was received from Lars Kalland, SM6NM:
The annual transmission on "Alexanderson Day" with the Alexanderson alternator on VLF 17,2 kHz will take place Sunday July 1st 2007 at 09:00 UTC (tuning up from 08:15 UTC) and will be repeated at 13:00 UTC (tuning up from 12:15 UTC).
The station will be open to visitors. There will be activity on amateur radio frequencies with the call "SK6SAQ". Check our web site: www.alexander.n.se
QSL-reports are kindly received:
- E-mail to: info@alexander.n.se
- or fax to: +46-340-674195
- or via: SM bureau
- or direct by mail to:
Alexander - Grimeton Veteranradios Vaenner,
Radiostationen
Grimeton 72
S-430 16 ROLFSTORP
S W E D E N
New Part 5 License Issued for 1750 meter band
Posted by Warren K2ORS/WD2XGJ/WD2XSH/23/WE2XEB/2 on June 20, 2007 at 12:48:02.
FCC Part 5 Experimental license WE2XEB issued today, June 20 2007. WE2XEB
licensee is Bob Raide W2ZM in Penn Yan, NY, with a secondary location in
Wayland,MA (QTH of K2ORS). Additionally Mobile operation is permitted within a
300 kM radius of Wayland,MA.
Parameters of the license are:
Freq: 160-185 kHz ssb; 160-189kHz cw and data
ERP 10W
Permission to conduct two way QSOs with Part 15 licenses GRANTED.
73 Warren K2ORS
WD2XGJ (136-140kHz)
WD2XSH/23 (505-510kHz)
WE2XEB/2 (160-189 kHz)
Re: New Part 5 License Issued for 1750 meter band
Posted by Warren K2ORS/WD2XGJ/WD2XSH/23/WE2XEB/2 on June 22, 2007 at 06:40:29.
In reply to New Part 5 License Issued for 1750 meter band posted by Warren K2ORS/WD2XGJ/WD2XSH/23/WE2XEB/2 on June 20, 2007
An addition and a correction:
WE2XEB is also licensed to operate in the 135.7-137.8 kHz band with cw and data from Penn Yan, NY 10W ERP.
Correction: Re: New Part 5 License Issued for 1750 meter band
Permission to conduct two way QSOs with UNLICENSED Part 15 station GRANTED.
Posted by Alan G3NYK on June 24, 2007 at 16:28:31.
In reply to Re: New Part 5 License Issued for 1750 meter band posted by Warren K2ORS/WD2XGJ/WD2XSH/23/WE2XEB/2 on June 22, 2007
Hi Warren, but does he have authority to qso amateur stations on 136 ??
Cheers de Alan G3NYK
Re: New Part 5 License Issued for 1750 meter band
Posted by Warren K2ORS/WD2XGJ/WD2XSH/23/WE2XEB/2 on June 25, 2007 at 06:05:32.
In reply to Re: New Part 5 License Issued for 1750 meter band posted by Alan G3NYK on June 24, 2007
Hi Alan,
The exact wording in the Experimental Description for the application (which was accepted by the FCC):
"Both one- and two-way communication (two-way with other Part-5 license holders and foreign amateur radio operators who are authorized to use the 2200 meter band) will be attempted as well as two-communications with stations operating under Part 15 of the FCC rules in the 160-190 kHz band."
So its my understanding that Bob can have 2-way 136 to 136 contacts, and both Bob and I can have 2-way 185 to 136 contacts.
That said, Bob has a big LORAN transmitter about 7 miles due East of his location! Bob has been able to hear Jay WD2XNS through the LORAN noise however.
73 Warren K2ORS
WD2XGJ 136-140 kHz
WD2XSH/23 505-510 kHz
WE2XEB/2 160-189 kHz
future HiFer beacon E H
Posted by Sal DeFrancesco on June 26, 2007 at 17:44:01.
I have been a bit inspired to get on 13.56 and breadboarded a converter from hifer to 80 meters. (I'm using my yaesu ft101 as the receiver)and a H-900 active antenna for now. I have not heard any hifers yet. I built a transmitter, and when I get things all set up, I'll be using a dipole and running the flea power rig sending E H at 10wpm using the same Ider from my medfer rig. Freq. will be 13.5635 MHz. I should be running by the end of summer.
low pass filter question
Posted by Doug Williams on June 28, 2007 at 05:15:29.
What happens if one daisy chains two low pass filters? Example: Two 500 kHz low pass filters, each with a 60db stopband attenuation, are daisy chained together. Would the total attenuation be 120db?
Re: low pass filter question
Posted by John Andrews on June 28, 2007 at 07:32:46.
In reply to low pass filter question posted by Doug Williams on June 28, 2007
Doug,
Some things that might keep you from getting the 120 dB:
1. Filter blow-by: If the physical layout permits unwanted coupling from input to output, you'll lose some stop-band attenuation.
2. Impedance: A 50 ohm (for example) filter probably provides that impedance at the output port over a limited frequency range. The output impedance in the stop-band may be wildly different, and perhaps very reactive. A second filter following it will then not behave as it would with 50 ohm terminations on both sides. You'll probably be fine in the passband, but results outside of that will vary.
One other thought: Be sure that the losses in the passband of cascaded filters are acceptable in your application. This can be really critical in transmitter output filters, for example.
John Andrews, W1TAG Datatrak UK Locations
Posted by Clive S Carver on June 29, 2007 at 11:13:56.
Looking at the Datatrak homepage:- http://www.siemensvdo.co.uk/products_solutions/fleet-management/real-time-vehicle-tracking/datatrak-technology/Datatrak+Technology.htm
I note that they state: "Positioning technology - Our positioning system uses a unique network of land-based low frequency transmitters throughout the UK."
Does anyone have any information as to the location of these LF transmitters?
Were any ex-Decca Navigator stations acquired? Although the Neston (just south of Liverpool on the Dee estuary) Green Slave station which was on 126.968Khz has now gone.
Clive
potrzebie