Hello OM N1BUG, For class E @85%eff you would need some more components. - An inductor in the DC between 1u capacitor and the drain / transformer low impedance input, typical >0.5mH at LF! - A 'tuni
Hello OM N1BUG, For class E @85%eff you would need some more components. - An inductor in the DC between 1u capacitor and the drain / transformer low impedance input, typical >0.5mH at LF! - A 'tunin
Hello Mal an all LF, I have built an Class-E 100W amp for 136kHz at approx 85%-90% efficiency at 12VDC with two IRF fet's parallel some time ago. The capacitors used in the output circuit were somwha
To DI2AM and all LF Good morning all, also copied by ear two transmissions just above 505kHz last night. 29-12-2009 00:50utc 505.20kHz DI2AM, QRSS3 and plain CW. 29-12-2009 01:00utc 505.03kHz QRSS3?
To All LF / G3KEV? Tonight started listening on 600m and copied slow CW by ear (computer psu still makes to much noise on 500kHz) 502,55kHz 22:27UTC: G3KEV XGR Please confirm transmission so I'll kno
Hello Lubos and all LF, Thank you, for the info, positively confirm hearing your signals: Also copied 88 on QRSS by ear and stopped copy there since 88 in a callsign or QSO did not make sense to me a
To All LF, Please be informed some Radio Amateurs in PA have apparently received permissions (via VRZA) to transmit 501-504kHz, as of Jan first 2010. PA0A has informed me about this and I appologise
To all LF, Please beware that the official Dutch Telecom Agency has not yet published the issue of experimental licences for the 600m band tot the Dutch Amateur Radio organisations VERON and / or VRZ
Dear OM Peter, G3LDO, I also had bad results with VXO drift both in single X-tal and in mixed settings. I found out that the old big type X-tals in the range between 5 and 9 MHZ are most suitable for
To All Stations heard 24/4 (listening only in the evening): Slow CW: DF3LP (O) (559) 137.7 20:00utc Normal CW: PA0KDM (589) / 136.4 / 20:15utc and OZ1KMR (539) 136.2 / 20:20utc. Listening below 136.5
Dear Mike, G3XDV and rsgb_lf_group readers I have done some testing with the new Spectogram software. I was able to make a sound recording and test some different settings this morning while monitori
Dear Lowfers It was a nice weekend on LF with a low noise level on saturday and sunday morning. Spectograms from stations heard this weekend have been added to my spectogram page: http://www.xs4all.n
Hi All, This was the second weekend in a row with reasonably low QRN. QRS-CW acitvity on sunday gave me the chance to try some new settings for Spectogram 5.0 The results including some new Spectogra
Dear John and Lowfers, Last weekend I was still using 5.01 but i have tried to look at Finbar, EI0CF's signal this morning and made a recording with 5.08. I used the same settings in 5.08 as in 5.01.
Dear Finbar, Your signals have been identified on spectogram at 0530utc. I am not 100% shure but almost every day this week around the same time i observed a slowly drifting signal around 136.2 and i
Hi all, Between 2145 and 2215utc a signal was seen with Spectogram on 72.00 kHz. Varying slowly in strength, no call sign and then it stopped. I am 100% sure this was no intermodulation in my receive
Hi All, During the eclipse I have monitored HBG75 with the UBA ON5OO software and recorded more or less the same anomality. Mike, G3XDV was so kind to send me his measurement files and i have combine
Hi All This effect is als known as the Moegel-Dellinger effekt or SWF (Shorwave Fade Out). A German language description can be found in the Rothammels Antennen Buch chapter 2.3.2.2. Ionosphaerenstoe
Hi All, Public awareness to the effects of extreme high power transmitters have resulted into a public discussion if Kootwijk is a propper site for a Giga powered LW transmitter. Legal procedures are
