Home |
Search |
Today's Posts |
#9
|
|||
|
|||
Critic of circuit before I build it.
On 4/3/2015 1:08 AM, Jan Panteltje wrote:
AGC (Automatic Gain Correction[1]) will keep that voltage high as long as possible with weakening signals. Yes, I can hear that work if I hit resonance quick, the volume jumps up, but then settles back down. I'll be measuring across a resonant ferrite rod, I don't know what a minimum usable voltage would be. I'll go check. Mikek Depends how far you are from any transmitter, and the direction the ferrite rod is pointing. For maximum signal it should be like this: | | ------- 0 transmitter | rod Yes, the long rod I reference before has a wide null off the ends. I have listened to two different stations on the same frequency, just by rotating the rod. I have it on a Lazy Susan. The thing to watch is the Q factor, the detector circuit can be seen as a resistor in parallel with the ferrite rod and tuning cap. ---------- |( | | |( === [ ] Rp |( | | --------- The higher Rp, the higher the Q factor, the more signal, the narrower the bandwidth B = f / Q Yep, I have an old Booton 260A for measuring Q. Thanks, Mikek --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
If Amloop is LC circuit, what about RLC circuit ?? | Antenna | |||
If Amloop is LC circuit, what about RLC circuit ?? | Shortwave | |||
To build or not to build Part II | Homebrew | |||
Build em | Shortwave | |||
Is there affordable software I can use to map out circuit traces for a printed circuit board? | Homebrew |