Had CW QSOs with M0FMT and GI4DPE at 2130 and 2155 UTC respectively. Heard mystery signal for the first time about half an hour later sending VVV TEST Regards Peter G3LDO
Hi Wolfgang, Many thanks to you and to the others that have sent me info. The best program (as far as I am concerned) is called Z-Y Converter, which was sent to me by Rik Strobbe. It came direct beca
Dear Hajo. Thank you for your comments. Your comments on the reason for using parallel resistance and reactance in an RF bridge are in line with the those in The Hybrid Junction Admittance Bridge, W.
Does anyone know of a program to convert Admittance to Impedance. The Smith Chart works fine but a computer program might be quicker and more accurate. Many thanks Peter, G3LDO
Hi Alan, Thanks for the information. Most noise bridges use serial variable resistance and reactance bridges but there is a circuit of a bridge using a parallel arrangement in the W6SAI radio Handboo
Many thanks to those who responded to my question regarding an Admittance to Impedance converter. I have a further question. Since most of the measurements we make on antennas and transmission line r
Hi Andy, The simplest broadband antenna might be the T2FD (Terminated Tilted Folded Dipole) designed by W3HH. This antenna is essentially a folded dipole with a terminating resistor in the opposite c
mal hamilton wrote: Correct Andy and it is a pity that it closed. I called you several times on CW but you did not answer!!!!!!!!!!!! although I did hear a BUZZ and a BANG from you and always wondere
There is a photo of a GR-874 on GR1602 admittance meter in Feb RadCom's Antennas. They will be described in in more detail in March. Regards Peter, G3LDO The pic from Stewart shows a "cheapy"...... t
mal hamilton wrote: Dave Where have these BRAVE men gone? along with their exploding BK amplifiers, and smoky Decca Jeeps. I seem to remember when MM0ALM appeared with his home built tube amplifier a
Hi Warren I fully agree with you. The Decca 5501's were used in unattended stations and transmitting 24/7 under a very heavy duty cycle. There were several transmitters all in the same rack transmitt
Hi Laurence, It takes time and experience to learn how to get any sort of signal from very electrically small antennas and there has been very little information in Japanese on this subject. I recall
Hello Ed, Your signals peaking 22dB above noise from 2050hrs. Will send a picture when I get a screen full Peter, G3LDO ** * <http://lfistes.erst.azerttyu.net/>*
Hi Laurie, I have a spare Power Amp Module 5501 but it is also faulty. However, the fault is clear - it just has blown power FETs. You can have it for free - you should be able to make a good one fro
Hello again Ed, Just closed down at 2300z. The attached image shows your signal from 2050 to 2250z. It was just beginning to fade at the end. I have dismantled my 136station to make way for more gene
A very interesting set of experiments Jim. I also found that long copper rods driven into the found as deep as you can get them worked best for 73 and 136kHz and that radials in a suburban environmen
I have just been on the phone to Katherine, Laurie's XYL, who confirmed that Laurie had passed away last Sunday morning. I will liaise with Laurie's family for a write up to go in RadCom's LF column.
Further to my last email I have put a tribute to G3AQC on my website. Just type G3LDO into Google Regards Peter, G3LDO The antennas at G3AQC were supported by the numerous trees around his QTH - not
mal hamilton wrote: Jim It is a pity you cannot stick to the subject, instead you launch a personal attack. For someone that has not progressed beyond basic entry level CW you are not in a position t
Hi Laurence, Bit about using trees as antennas on the web. Try keying in General George O. Squier into Google and see what you get. Also in Scientific American, July 14 1919. p624 Regards Peter, G3LD
