2024年12月1日 · DL2EWN Germany. Login is required for additional detail. Email: Login required to view. Ham Member Lookups: 3001

2013年12月29日 · Wideband linear PA by DL2EWN (FunkAmateur 07/2008 and 08/2008). The amplifier has been characterized for different driver stage supply voltage (Vd), final stage supply voltage (Vf) and final stage standby current (If):

2009年12月8日 · The FA-SDR-TRX was created by Harald DL2EWN and described in an article series in the German Ham Radio Magazine Funkamateur. After the big success of the single band kits like Softrock, SDR4080, or Genesis, the FA-SDR-TRX is …

2013年3月14日 · Measurements on a wideband 1 watt amplifier, designed by DL2EWN. A small power amplifier for the HF and VHF bands using a PD85004 LDMOS in class A. Another small power amplifier for the HF band using two PD85004 LDMOS in push-pull (class AB). A Class-A simple QRP power amplifier covering the HF and the …

Here in this kit, I added a 36 Volts zener diode between the collector of the final PA transistor and the earth to protect it against high SWR. I also added an oversize heat sink to the 2SC1969 transistor. The rig puts out more than 8 watts on 13,8 Volts.

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HF-Testgenerator nach DL2EWN: Einfacher, quarzstabiler HF-Testgenerator, Bausatz mit Platine und allen benötigten Bauteilen; es werden ausschließlich bedrahtete Bauelemente verwendet. Technische Daten Frequenz 3,579545 MHz (durch Einsetzen eines anderen Oszillatorbausteins änderbar) Ausgangspegel -53 dBm (500 ...

2009年12月9日 · FA-SDR-TRX uses the well-known Tayloe (sampling) detector. The author, Harald, DL2EWN conducted a series of tests with some unknown and other better known switching ICs. He tested the ICs within the receiver circuit and compared the receiver’s sensitivity (MDS), intermodulation (IP3), and image rejection. The following ICs have been tested ...

2009年12月8日 · The FA-SDR-TRX is an all-band low-cost software defined radio. The FA-SDR-TRX was created by Harald DL2EWN and described in an article series in the German Ham Radio Magazine Funkamateur. After the big success of the single band kits like Softrock, SDR4080, or Genesis, the FA-SDR-TRX is the next step in the evolution of SDR kits.