Ok. Large is relative. I mean something that can be run from a normal 230V mains socket :-) (single phase!) It would be easy to build a transformer, a termination resistor, a MOSFET driver IC as a s
james Mine is a mk1 and output is 0 dbM but antenna is 1/4 wave inv L which helps' This is a temp setup until I get an interface built to conn to the MF amp I cannot hear your signal at my QTH 73 de
Andy es Co 6 phase even better lower ripple. A car alternator is 3 phase, could easily be 6 g3kev From: [email protected] Andy Talbot Sent: Saturday, November 28, 2015 4:26 PM To: rsgb_lf_group@bl
I have used home brew class E and never had a problem, more critical to set up than D but more reliable having got it on the nose, g3kev From: [email protected] Andy Talbot Sent: Saturday, Novembe
Good discussion, I think 3 phase is available if requested insome parts of the UK G3kev Sent from my iPhone On 29 Nov 2015, at 09:42, Andy Talbot <[email protected]> wrote: If you use two transfor
My RX on WSPR MF 477.2 consists of 2 separate systems 1. IC 706 and 1/4 wave inv L full size on 472 Khz up vert 33 metres rest horizontal E/W 2. TS-50 and 1/4 wave inv L full size on 1800 Khz and not
Guten Tag Stefan Main amp is a single Decca 5501 module and has a smit trigeer so can take sine or square wave. I use square wave input for Opera and QRSS because of the divide down from 5 Mhz main V
Nice signal Stefan on MF WSPR this evening TOP OF THE SHOP DE MAL/G3KEV From: [email protected] DK7FC Sent: Friday, December 04, 2015 5:07 PM To: [email protected] rsgb_lf_group@black
PS: Watch the duty cycle of the output signal. I don't know how accurate it has to be for that PA. Maybe you'll need another amp stage in front of the 4426 and anti-serial Z-diodes. Or an op amp sta
Hugh For acceptable results you need a REAL antenna. I notice that antennas in use in the UK are useless for weak signal reception. Only one stn in the UK can decode my signal. For MF using the prove
MF I am able to decode WSPR sigs at 30 dB level yet no one beyond M0LMH can receive/decode my signal. M0LMH receives me at around 18 dB therefore I have at least 10 dB in hand but no one has the RX c
Vinny My antenna is a 1/4 inv L full size for 472 KHz height over 33metres. I do not need a variometer Mal/g3kev Sent from my iPhone On 5 Dec 2015, at 19:15, Vincent Stallbaum <[email protected]> wrote: H
Am 05.12.2015 19:26, schrieb mal hamilton: [...]yet no one beyond M0LMH can receive/decode my signal. Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az 2015-12-05 00:04 G3KEV 0.475707 -27 0
Actually Mal some of the rx dx records both on LF and MF have been with pseudo high Z Joysticks a la Wet Match Sticks. I see recall the Joysticks PW adverts for them for HF! My best performers here a
MF My TX output is 80 mW on MF WSPR and best DX so far SM2DJK, OR7T, DL-SWL, and M0LMH. Best distance 1567 Km to SM2DJK Must try this QRP experiment using OPERA and see what happens. No QRO availalbl
