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Millivolmetro digitale a tre cifre
Utilizza un circuito stampato a doppia faccia della dimensione di 73,6 X 48,2mm e display ad un digit del tipo TDSL 5150
post 05 Feb 2024
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Simple electronic keyer
This circuit in figures 1a and 1b is a simple keyer which can be built
Simple Noise Generator
As a signal source I thought about noise because we knew from school that all frequencies were present
Keyer ETM-5C Elektronik
The electronics should no menus and double occupied
Building A High Voltage
I stumbled on an article by a german ham and materials engineer
Installing long wire antenna
Installing a long wire antenna when the only best way is to attach one end to a tree
170
This circuit in figures 1a and 1b is a simple keyer which can be built
As a signal source I thought about noise because we knew from school that all frequencies were present
The electronics should no menus and double occupied
I stumbled on an article by a german ham and materials engineer
Installing a long wire antenna when the only best way is to attach one end to a tree
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground