What is an offset attenuator?

What is an offset attenuator?

An offset attenuator consists of a local oscillator (LO) connected to a diode mixer through the attenuation control. The higher the LO level, the higher the amplitude of the offset signal applied to the receiver. To increase attenuation, decrease the LO signal into the mixer with the control.

Transmitter hunting (also known as T-hunting, fox hunting, bunny hunting, and bunny chasing), is an activity wherein participants use radio direction finding techniques to locate one or more radio transmitters hidden within a designated search area.

How do you foxhunt?

Some Rules of Foxhunting

1. Always wear the proper attire.
2. Don’t make a lot of noise, as the hounds may hear you and get distracted.
3. Always use proper terminology.
4. Always warn the rider behind you of possible hazards.
5. Never ride past your field master or the Huntmaster.
6. staff members and hounds have the right-of-way.

How do I track my ham radio signal?

Yes by a method called triangulation. You need certain equipment, a highly directional antenna, a receiver and a map. You point the antenna toward the signal and record the heading where the signal from the transmitter is the strongest. You do this at least 2 different locations.

How do you reduce attenuation?

Lower loss dielectrics. Signal attenuation can be reduced through a selection of lower loss materials at an increased cost rather than reducing the PCB routing length. Materials with lower attenuation are achieved through a change in the epoxy throughout the glass weave to achieve a lower dissipation factor.

How do you correct attenuation?

How can you estimate the correlation between two latent variables? The correction for attenuation formula: rxy / sqrt(rxx * ryy) Or in words: The disattenuated correlation is the raw correlation between x and y (rxy) divided by the square root of the product of the reliability of x (rxx) and the reliability of y (ryy).

Why do fox hunters wear red coats?

This attire usually consists of the traditional red coats worn by huntsmen, masters, former masters, whippers-in (regardless of sex), other hunt staff members and male members who have been invited by masters to wear colours and hunt buttons as a mark of appreciation for their involvement in the organization and …

How to use an offset attenuator for foxhunting?

Using an offset attenuator for on-foot foxhunting is easy and efficient, once you get the hang of it. An S-meter on your receiver is a big help in getting RDF bearings with this attenuator and a small beam or quad, but it is not mandatory.

Can I use this offset attenuator with my VHF radio?

This offset attenuator can be used with any VHF transceiver or scanner radio that has a removable antenna. Provisions for attaching to sets with integral antennas (such as the Alinco DJ-C1T and DJ-S11T) are not included. The receiver must have sufficient frequency coverage to permit tuning it 4 MHz away from the hunt frequency.

What is an RF attenuator and how does it work?

An RF attenuator is a device that goes between antenna and receiver to reduce the signal strength down to within the range that the receiver S-meter can handle. Without one, you may think you’re close to the fox when you’re still far away.

Are transmitters any good for fox hunting?

Much like the picture on the right (courtesy of Joe Moell K0OV) they are more useful for fox hunting when you add the active attenuator to your setup. FYI, Joe is the co-author of the great book “TRANSMITTER HUNTING, Radio Direction Finding Simplified” available where most ham books are sold.