Hello Gary and LF Group, There has been mention in the past on the LF group of LF & MF operators using Icom IC706 as a transverter driver due to its frequency stability, how many of you out there use
Hi JB, I remember comments on a similar situation from an old QST. In June 1977, Barry Boothe W9UCW recounts his success. His "Beverage" was half a mile long, on insulators, three barbed wires above
Hello LF friends, Mention of the BC221 brings back some memories. Here in ZL land we still enjoy very privileged access to the LF region, beginning in the early 1990's. In fact, things got even bette
Hello all, I have recently done some tests on a pair of identical transformers removed from two identical ovens. Perhaps unfortunately, I removed the magnetic shunts before doing any no-load testing.
Hello all, At long last we have a temporary 600.m slot, beginning on Monday 1st. March. No special permits or reporting of results. As there is only one licence class now, any ham can participate. I
Hello Graham, Our current temporary New Zealand allocation 505-515 kHz. specifies a maximum bandwidth of 200Hz. Hopefully we will improve on this with time. Kevin ZL4MD Can any one indicated what is
My thanks to Paul-Henrik, John and Jim for their comments on "opening" the IC718 for transmitting below 1600 kHz. This appears to be a lost cause - a bit of shame as I have installed the high-stabili
Hello all, Despite reference to the usual sources I cannot persuade my IC718 to transmit below 1600 kHz. I believe that operation is possible down to 300 kHz. or so but have yet to find the recipe. A
Jim, Dave and others, My "opened" IC706 Mk2 performs the same as JIm's Mk2g from 500 kHz down. Output waveforms [CW] deteriorate badly from sinusoidal when one attempts to maximise power output. Also
I have been investigating methods of tuning coils for mobile use and one method that appeared briefly in one of the ARRL Handbooks of the 50s was the shorted turn method of tuning. I tried a home mad
Hello LF gang, Has any one tried a RigExpert AA-30 or AA-54 antenna analyser ? They should appeal to the LF enthusiast as they go down to 100 kHz, 73, Kevin ZL4MD
Take a look at the article on page 45 of the ARRL Antenna Compendium Volume 6 about a very interesting receive antenna for 160 and 80 meters. LF usage should be possible with some component value cha
It uses 3mH - 2mH is too little, 4mH is too much. Obviously I need to be able to vary this inductance rather more finely and I thought of using a small variac (don't laugh!) as a variable inductance,
Maybe one day,,, John F5VLF All very true John. A few of us are doing regular tests on 508.1 kHz. The usual mode is slow CW but there are some more exotic modes in use. For the last twenty years or s
My thanks to Walter, Mal, Mike, Wolf, Paul, Geri and Bob for the response to my 706 query. I have not checked the web sites yet but will do so in the next day or so. One or two related comments : Arg
I use my IC706 as signal source for the 180 KHz transmitter, dividing by 100 from the 18 Mhz band - and it works like a charm {our ZL band is 165-190 kHz}. At some stage I believe that our allocation
Hello all, I also mourn the untimely passing of Andrew Corney, ZL2BBJ. For the past many years Andrew was a dedicated member of our ZL LF group. Along with Dave, ZL3FJ he was an early user of large l
Hello all, As a matter of interest, R B Dome authored an article on this subject in the September 1934 issue of QST. Also, he credits his IRE co-author Nickle, W2ETH as the inventer of this antenna.
..........Now if historic spark transmitters were permitted that could be fun. I havn't operated spark since I was 12 years old. It was (slightly) unofficial...... So did I, at about the same age, us
Hello all, Like my friend Dave, ZL3FJ, I am also "in waiting" on a 500kHz allocation in ZL land. I have done some testing on my "modded" IC706 Mk2 using a thermal RF ammeter and dummy load. About 30
