|
|
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
This document is just what I was looking for, it´s very useful, it contains adjustment procedures for the final stage of the power amp and also
has a complete wiring diagram and description of the main semiconductors used in the design.
;
Dear Sirs,
Thank you for the fast support, the manual does provide all necessary information to repair the radio. All schematics are in a good quality for reading.
The manual fits 100% to my requirements as a technican.
Kind regards Thomas
;
the big video recorder format s-vhs many features delicate in loading system of the cassette. Such machines are no longer manufactured, it would be too expensive.
 ;
THIS MANUAL IS VERY GOOD AND VERY CLEAR
PLEASE NOTE IT DOES NOT CONTAIN THE SETUP INFORMATION TO ALIGHN THE GEARS IN THE CD MECH IT DOES SHOW ALL THE PARTS AND THEIR LOCATIONS .
;
Complete service and operation manual. All schematics are there, all circuit boards AND add-on boards. Including exploded views ,component names and specifications. Also electrical and mechanical adjustment procedures are in this manual. This manual also covers the more advanced BR-S811E unit. Scan quality is fair and usable.
Philips Semiconductors
Circulators and Isolators, unique passive devices
Application Note AN98035
isoductor: three inner conductors coming from the three ports cross under an angle of 120 degrees and are connected to the outer conductors at the other end. They are isolated from each other where they cross each other. Between the inner and outer conductors there are two ferrite disks, magnetized by a permanent magnetic field. An rf current in inner conductor 1 generates in the ferrite disks an rf magnetic field perpendicular to the plane of the loops, which it makes together with the outer conductors. Due to the properties of the ferrite the rf magnetization is not in the same direction, as we can see in the Polder tensor page 3. The angle between the rf magnetic field and the rf magnetization depends on the frequency and the permanent magnetic field. If we adjust the permanent magnetic field so that the rf magnetization is parallel to the inner conductor 3, then loop 3 is not induced but only loop 2: an excitation of inner conductor 1 will be coupled to inner conductor 2 but not to inner conductor 3, inner conductor 3 is decoupled. If we look from outside into one port of the isoductor, we see an inductance parallel to a resistor (see figure 22). The simplest way to make a ciculator out of this isoductor is given in figure 23: We bring the inductance of the isoductor into resonance by a parallel capacitor and match the whole to the line by a series capacitor. With Fig.22: Equivalent circuit of an isoductor more complicated networks we can build broadband circulators with a band-width of up to one octave. Lumped element circulators can be made for frequencies between 30 MHz and about 2 GHz, but normally they are used between 50 and 500 MHz.
Fig. 23: Small band lumped element circulator
1998 Mar 23
17
|
|
|
> |
|
