|[AMRadio] AMPX article on mod reactor|
k4kyv at hotmail.com
Mon Aug 15 23:00:55 EDT 2005
>>This would be the article concerning the value and design of the reactor
>>and blocking cap value.
>>I will be building up a modulator using either a CVM4 or 5
>Depends on how low in frequency you want to pass through the modulation
>and how much current you'll be running in the final section of the rig.
>Typically, 8HY per 1000 ohms of impedance load in the final is a pretty
>good rule of thumb.
That's about the standard value used in AM broadcast transmitters.
>8~10uF of coupling should do nicely. Depending on where you put the
>coupling, will determine
>how much of a voltage rating the capacitor needs to be.
Actually, broadcast transmitters use much less than than, and still boast of
flat response down to 30~ or lower. RCA transmitters typically use 1 mfd.
Gates uses 2 mfd. I use 4 mfd in my homebrew rig @ 4000 ohms modulating
73, Don k4kyv
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