Hello Bernd Grupe, hello All DF8ZR> Soegiono Gamal has built a loop recently. Well - the design of this loop is not based on my own... ...I should have pointed out this fact to Bernd a bit clearer. I
While testing RX antennas, observed CQ call: 20:08 - 20:20 UTC DL3FDO RST=339 on active ferrite rod indoor antenna (-111 dBm) RST=459 on active electric vertical outdoor antenna (-98 dBm) Best 73 de
Dear LF friends Hope you all experienced a "good landing" in new year 2000. Using the DSP Receiver KWZ30 manufactured by Kneisner & Doering http://kd-elektronik.com/kwz30_e/index.html I come acros re
Dear LF friends Thank you for the interest to my recent posting regarding receiving on 137 kHz Band. Unfortunately this escalated into a discussion on benefit or drawback on DSP in a receiver. This w
Dear LF friends, few details to add to my last message: ADC is actually a 18 bit resolution (Burr-Brown) DSP uses 16 bit for calculation DSP-1 determines the final IF BW and demodulates DSP-2 does no
Dear LF friends who would like to know more details from stations DCF39 and/or DCF49 I am just compiling a list of details, facts, technical parameters which I will forward to the user of DCF39 and D
Hello LF friends two questions regarding DCF39 and DCF49 (Q1) Who is able to receive either station from a distance of _more_ than 500 km ? (Q2) Who is able to _decode_ the signals from DCF39 and DCF
Dear Petr, OK1FIG> Interesting anyway, but is this still amateur radio transmission Please don't get me wrong. For my understanding, this is one and the same, amateur radio as well as scientific expe
Dear LF friends thanks for your emails containing info about data sent by DCF39 & DCF49. If you look on www.efr.de, there is a schematic showing the telegram format which is used by both stations for
Dear Vaino, just see your regular Decca FS measurements. Recognize that you "only" have measured the green channels. As far as I understand the working of Decca as a system, it consists of purple, ma
Hello All last saturday a "LF tactical team" took a close look on the DCF39 site in Burg near Magdeburg. The data presented previously in my station profile DCF39.TXT have to be updated: 1) One anten
Hello Andy G4JNT G4JNT> Both coils were the same diameter, same inductance, and roughly No. Unless the "capacity" exhibits significant dielectric losses, great self capacitance does not harm in lieu
[Soegiono, Gamal] Hello Rik and all, RS> Some weeks ago someone (G3YXM ?) reported hearing Confirm receiption of a 2-tone FSK signal on 82k8 (approx) which just fits into 200 Hz of IF BW. According t
Hello Dave and all, DS> You report a RTTY signal on 82.7. This one at around 81k1 is possibly GYN2 on 81k0 assigned freq. located at 00W10/51N30 (London), using F1B, occupying 190 Hz of BW and feedin
Hello Alfred DF2BC, hello all While testing a mixer circuit, I came acros DQ0KBM transmissions: Saturday May 13/2000 11:45 UTC calling CQ on around 136.6 kHz a nice 6 dB above noise floor would repor
Hello Petr, OK1FIG PM> little questionnaire here? exclusively using aural method for copying signals below 150 kHz here. While in search mode I use 300 Hz For listening to one station I prefer 200 Hz
Hello Martin an individual grounding rod when driven into soil builds up an electric field in the finite conducting and capacitively medium "soil". This field spreads out in a form of a cone (roughly
Hello Costas, hello all, thank you for your interest on my isolation transformer solution and the suggestions you made. CK> The only problem with this approach is that in case of [use monospaced font
Has anybody on the list got a "whole house" mains filter installed at their QTH? Not a "whole house" mains filter, but a radio room mains "filter". All main supply to my radio equipment is run via a
Hello Lech and all lining the antenna tuning house with screening is about standard in LF/MF transmitter installations. Screening of all six sides serves several tasks: provide short and low impedanc
