Hambrew Links

Close VLF Projects

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 2N-Serie

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
Visits

   visitors

   visitors online

Search




70cm Projects - Transmitters

Click to enlarge432 MHz TX by LY3LP
Used the fundamental harmonic 24MHz quartz.Multiplied by the apperance of 432MHz . TX easily reapyted, uncritical.
http://sa555.blogspot.com/2011/03/432-mhz-tx.html

Click to enlarge432MHz - 144MHz mini beacon by LY3LP
On 144 MHz it is heard well within 4 meters distance. 432MHz beacon is heard good about 30cm. For easy converters/receivers testing.
http://sa555.blogspot.com/2011/03/432mhz-144mhz-mini-beacon.html

Click to enlarge433 Mhz TX by LY3LP

http://sa555.blogspot.com/2009/04/433-mhz-tx.html

Click to enlarge434,2 MHz TX by LY3LP

http://sa555.blogspot.com/2010/05/4342-mhz-tx.html

Click to enlarge434MHz SAW generator by LY3LP
434MHz SAW generator with ERA 3.
http://sa555.blogspot.com/2014/02/434mhz-saw-generator.html

Click to enlarge435,9 MHz FM mini beacon by LY3LP

http://sa555.blogspot.com/2012/11/4359-mhz-fm-mini-beacon.html

Click to enlargeexperiment of 1transistor TV transmitter by JF1OZL
I will show you a simple TV transmitter. But this is planned only for experiment. You can not make TV station with such a simple circuit. And experiment of this gear makes some interference for TV.
https://www.emilio.com.mx/jf10zl/tvtr.htm

Klik voor vergrotingORP/p 433 MHz NBFM tone, CW , SAW TX by LY3LP

http://sa555.blogspot.com/2012/12/orpp-433-mhz-nbfm-tone-cw-saw-tx.html

Click to enlargeSimple 430 FM TX by JF1OZL
This is a very simple 430MHz band FM transmitter. This transmitter uses only 2 FET-transistors. Oscillator unit makes 16MHz signal with its crystal. The oscillating frequency is changed by Varicap diode.
https://www.emilio.com.mx/jf10zl/430TX.htm

Click to enlargeUHF signal-generator by JF1OZL
One day, as a next step of my hand make activity, I decided to make 430MHz transceiver. 430MHz transceiver includes some 430MHz amplifier. To tune these amplifier and band pass filter, I need UHF signal generator.
https://www.emilio.com.mx/jf10zl/uhfsg.htm


Creation date : 16/08/2007 @ 18:57
Last update : 19/03/2020 @ 22:51
Category : 70cm Projects
Page read 25067 times


Print the article Print the article

Google Ads


^ Top ^