Hambrew Links

Close 136 kHz Projects

Close 472 kHz Projects

Close 500 kHz Projects

Close Multiband HF Projects

Close 160m Projects

Close 80m Projects

Close 60m Projects

Close 40m Projects

Close 30m Projects

Close 20m Projects

Close 17m Projects

Close 15m Projects

Close 12m Projects

Close 10m Projects

Close 6m Projects

Close 4m Projects

Close VHF Airband

Close 2m Projects

Close 70cm Projects

Close 23cm Projects

Close 13cm Projects

Close 9cm Projects

Close 6cm Projects

Close 3cm Projects

Close 1,25cm Projects

Close EHF Projects

Close Antenna Matches

Close Shack Accessories

Close Power Supplies

Close Test Equipment

Close µController Arduino

Junk Box Circuits

Close Tubes

Close Transistors BC-Serie

Close Transistors BD-Serie

Close Transistors BF-Serie

Close IC 74XX-Serie

Close IC 74LSXX-Serie

Close IC 74SXX-Serie

Close IC LM-Serie

Close IC TDA-Serie

HF Propagation


   visitors online


4m Projects - Amplifiers

Click to enlarge300 W PA using 3 x RD100HHF1 by OZ2M
This PA has been designed by Sergey EX8MLE and uses three Mitsubishi RD100HHF1 FETs.

Click to enlarge300 W PA using a MRF300AN transistor by EX8MLE
The power amplifier is designed to be used in amateur radio stations of 70 MHz band. The circuit is typical and does not require any explanations.

Click to enlarge70 MHz 25 W Power Amplifier by OZ2M
This purpose of this page is to give a brief description of a 70 MHz power module PA that has been published in the Danish amateur radio magazine "OZ." This way hams outside Denmark may also benefit from the design.

Click to enlargeA 75 watt power amplifier for 70MHz by GIØGDP
This amplifier is intended to be simple in design, easy to build and as cheap as possible.

PA70H –50 watt rf amplifierfor70MHz by SP2DMB
This dokumentation concerns the construction of a power amplifier for the 4m band. The main part of the device is mosfet Mitsubishi RD70HVF1. Although it is dedicated to the higher band, but it is stable at 70MHz.

Click to enlargePre-amplifier for 70 MHz by G3PTU
This unit uses a dual gate MOSFET. You can use virtually any of this variety of semiconductor; the ‘Philips’ radial type e.g. BF981 appears to be just as good as the top hat types.

Creation date : 10/11/2011 @ 23:42
Last update : 29/03/2020 @ 17:20
Category : 4m Projects
Page read 15343 times

Print the article Print the article

Google Ads

^ Top ^