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On Aug 9, 10:58*pm, Scott wrote:
You can homebrew a very simple amp that should meet your specifications.... A generic PC board can be found athttp://www.rfparts.com/pcb.html and I would recommend part number DEM2330. *There is a link to "View a pdf of the DEM2330 Instruction Sheet." *You could build everything as they show in the instruction sheet (which is for a 1300 MHz amp) and just substitute the RF module with the Mitsubishi RA30H1317M module for 2M or the RA30H4045MR for 70cm. *The data sheets for the modules are athttp://www.rfparts.com/module_sau-sav.html#raand there are also more module choices there. Ahh right... I had a look around, looks like Minikits[1] sell the power modules (and even a PCB). This looks promising. *Both modules specify an input power of 50 mW maximum, so you would need an attenuator (pi type is easily done by cutting a break in the input lead on the circuit board and installing the correct resistors around the cut). *If you have 1.5W from the HT, you would need about 16 dB of attenuation. The handheld can be wound right back to 50mW when running off batteries... otherwise 0.5W. A pi network isn't hard though. That said... I won't make the mistake I made last time -- last time I tried making it with 5W wire wound resistors... and wondered why it didn't work. I shall do some further investigation. Thanks. Stuart Longland VK4MSL 1. http://www.minikits.com.au/kits2.html |
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