Another possibility for the ultrasonic rx that I have used successfully for the same purpose is a standard gas leak detector as probably used by BT cable jointers etc. Controllers for strings of stre
Wolf I never use HTML deliberately but this one slipped through by virtue of the 'reply in same format' check box being ticked. I would like to blame Microsoft for having too many options, but......
Steve & others You need to find the RF resistance of the loop at the working frequency to see how the measured 2.3 amps compares with what you may expect for the 18 watt power level. There are severa
Forget the numbers I quoted re my LF loop in previous posting; in defence all I can say is I was first licensed in mid sixties and been member of RSGB since 68. Draw your own conclusions!!! For some
However, I recently asked if anyone knew of a Level Meter D2155 made by Siemens that I recently aquired. I got no response so I assume that no one knows about it.......... Peter (and anyone else int
For those of you who like me are using older gear on LF here's a hint worth following up. The Yaesu FT757 like many other rigs provides a 'band data' output for use with the matching linear amp etc.
Geri Simple shaft encoders use two identical pulse trains, say A and B, from the encoder that are 90 degrees apart in time. That way the direction of turning can be detected depending on whether the
Gidday from ZL. Only other likely looking stateside station I can find on 137.000 exact (and based on 3/4 yr old data) is WSC as below. 137.000 TUCKERTON NJ WSC 39N3800 074W1800 Anyone know if this i
The classic method for determining self capacitance of an inductor is to measure the resonant frequency (freq) with several values of parallel capacitance.(C) Making a plot of 1/(freq)squared on the
While it is generally correct to assume that bigger LF antennas will give better results, there is an important limiting factor that means any amateur 'pond crossing' will not necessarily benefit fro
Tnx to John (KD4IDY) for the useful comment. My point was that given the normal constraints on an amateur antenna LF setup, bigger ain't necessarily better for verticals, when gunning for real DX (20
Hi Geri Galveston NDB 'GLS' is on 206 kHz exact. Its lat/long are given as 29N1900 094W5600. A 'local' may be able to translate that into a street/road address for you. Most of the active LFers here
Thankyou for the very interesting summary of the KWZ30 receiver design and performance. My initial reaction is that it seems the analog section of the rx was designed separately from the digital back
Andre' You might recall some comment I made recently on the rsgb lf reflector re the GLS beacon. Most of the active LFers here in ZL have heard it. Comes in for a short time just before Galveston sun
Toni If the 2355 is anything like the 2155 it should be very useful. The 2155 has a selective receiver with 3.1 kHz and 20 Hz IF B/Ws as well as a wideband receive function for the full 200 Hz to 620
Geri Great to finally see a picture of the GLS antenna. Its top loading looks to be designed as outlined in Watt's 'VLF Engineering' where the drooping umbrella wires are insulated off at a point suc
ON7YD expounded, **there might be an 'apparatsik' at the DXCC board** Hi Rik and others, Any chance of a free translation of that delightful sounding word 'apparatsik'? My best guess would be 'glory
Laurie, I think you will find that you need to remove the 300 footer before trying the low height antenna- otherwise mutual coupling effects will surely stuff things up. And at 300 feet you will be g
