Hello all, here are some Bd545/546 data: All BD545 are NPNs, all BD546 are PNPs, all peak current 15 A and dissipation 85 Watts at Tcase 25 degs Celsius, Ft > 3 MHz, B >25 at 5 A; Case "TO-3 plastic"
Gasparik Richard schrieb: Hi LFers... Have anyone an CEPT document with recomendation for hams to use 136kHz ? Rich OM2TW It should be possible to find it on the ERO server http://www.ero.dk The CEPT
Dear all, I do hope that Magne is not in the same position as a ship's operator in the harbour of Narvik. It ist known that this harbour is surrounded by mountains which effectively screen it from th
Lbr Wolfgang, vielleicht erwische ich euch noch am 1. Mai, denn die Tage davor bin ich engagiert beim QRP-Treffen in Pottenstein. Du hast den DF7VX im Cluster gemeldet; hast du ihn gearbeitet? Das is
In my complementary power amplifier I do not need toroids so far, but in my LF VSWR meter I am using an Amidon (Manufacturer being FairRite, USA) FT50-77 but in the base of my antenna I am employing
This we have also discussed in Germany among LFers in Friedrichshafen: As long as You can put your 200 mW TX into your pockets it will be QRP. HW? 73 Ha-Jo, DJ1ZB I run 700W RF to make less than 200m
Hi all, concerning s-meter reading of SSB or CW the best method I have found so far is the principle which has been used in the old Plessey SL621 integrated circuit, a combination of two detectors wi
Hi all, to make the german expressions clearer, I think we generally use the wording "litz wire" for many thin wires bundled without insulation between wires, mostly in standard electric installation
Dear all, I was also wondering that PA0SE has used this german expression here which, as far as I can recall, had been created already in the sixties. "Steckdose" means wall socket, power point, main
Thank You for this description! I would recommend: Keep both masts grounded. 73 Ha-Jo, DJ1ZB Mike Dennison schrieb: A few weeks ago there was a discussion about whether to earth masts, or leave them
Dear all, concerning the beginning of LF amateur operation in Germany I must confess that a very detailed description of the equipment used has never been published but I think that the contribution
I think Lauries proposal is necessary even more because today the announced draft mandate of the European Commission has been sent out (to CEN, CENELEC and ETSI) for a standard on Telecommunications
Dear all, in order to convert just words into figures I feel it necessary to describe the situation in Germany more in detail. The german NB30 standard has been rejected by all german radio users and
Dear all thanks to an email from Alan, G3NYK, my eyes have been opened for a second mistake in the circuit of my complementary darlington-pair LF power amplifier in the LF Experimenter's Handbook (th
Dear all, as Dick, PA0SE, when raising his question, has mentioned my bipolar PA in the latest version of the LF Experimenter's Handbook using complementary darlington-pairs and that the emitter arro
Thanks, dear Rik, I am also employing a combination of a peaked low-pass filter and a normal low-pass filter in the tank circuit. Furthermore I have tried to receive my second harmonic in the lf broa
Dear Steward, at this date, less than one week before the beginning of the mess, I guess it is too late to expect to find a hotel within walking distance of railway station and Messe. I do not know w
Dear all, in my big-volume Langenscheid's dictionary Kugelblitz is translated as "ball lightning", as John Rabson G3PAI has already proposed. 73 Ha-Jo, DJ1ZB Dick Rollema schrieb: To All from PA0SE W
Dear Alberto, as long as it for receive only, I think the best way will be to use a toroid with a rather high AL value. About 30 years ago I had to design an rx input balun transformer for a military
Dear Dick, during the time when DF3LP in Kiel had been active on LF and also copied SAQ he had written on this server that SAQ sounded "like a flute". This would mean that when receiving SAQ with suf
