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Posts tagged SWR、

Schematic diagram for a broadband QRP SWR metering circuit and SSB TRANSCEIVER 80M / 40M boster filter IF Radio

A schematic diagram for a broadband QRP SWR metering circuit for use in a QRP antenna tuner. One could simply hold a momentary DPDT switch down and watch the LED while tuning the capacitors of the antenna tuner for minimum or zero light.

Circuit diagram SSB TRANSCEIVER 80M / 40M

Units units include: 1. Exciter section working on the frequency of 3250 Kc s / d 3450 Kc. 2. RF section Oscilator Crystal Unit worked on Frekwnsi In the 80 M Ayala Oscilator Kristal is 7200 Kc In the 40 M Ayala Oscilator Kristal is 10,400 Kc 3. RF PA section I make this transceiver […]

1500W UPS circuit

1500W UPS circuit using IC LC3524, IRFZ44 1500W UPS circuit using IC LC3524, IRFZ44

CIRCUIT DIODE SWITCHED SYNTHESISER

Now I shall introduce my somple diode counter. To start off with, the MC145152-2 A-counter can have a count of 512, 1024, or 2048. This means that a 12.8MHz crystal, divided by 1024, will give you a reference frequency of 12.5kHz. You could alternatively use 6.4MHz divided by 512. Not many options there! You still […]

Transformerless power supply design

Transformerless power supply design SMPS +12v -12v or +15v 25A Transformerless power supply design using TR / IC Transformerless power supply design Transformerless power supply design SMPS +12v -12v or +15v 25A

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