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Posts tagged 80M

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 […]

shows passive components, resistors, capacitors and inductors, and also electrical components such as switches, relays, motors and lamps – symbol

The diagram below shows passive components, resistors, capacitors and inductors, and also electrical components such as switches, relays, motors and lamps. In europe the for the resistor is a rectangle, whereas the US symbol is a zigzag. On my site, schematics may be drawn with european or US symbols, depending upon which of my circuit […]

2 tr preamp mic schematic

2 tr preamp mic schematic using C536, C458 R1,7 …… 2K2 R2 …….. 47K R3 …….. 270 R4 …….. 2M2 R5 …….. 180K R6 …….. 470K R8 …….. 15K R9 …….. 150K C1 …….. 22uF/16V C2 …….. 200nF C3 …….. 10uF/16V Q1 …….. C694 / C458 Q2 …….. C536 / C458 VR …….. 50K

Circuits OP Amp

Circuits OP Amp Op amp Interface using RC4558P Op amp Interface using RC4558P Dual High-Gain Operational Amplifier using RC4558P Features Supply voltage 22V for RM4558 and 18V for RC/RV4558 No latch-up Large common-mode and differential voltage ranges Low power. Parameter tracking over temperature range Gain and phase match between amplifiers The RC4558 integrated circuit is […]

LM555 Electronics Schematic Diagram Time Constant Control part 16

LM555 Electronics Schematic Diagram Time Constant Control part 16

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