Eddystone Receivers 680X S770R 770U EC964/7 & 990R
Communication Receiver Manuals and Circuits Available
|
Circuit Diagram, Service
Manual, Service
Information, Schematic Diagrams and Manuals |
For Repairing, Restoration and
Servicing of Vintage and Modern Electronic Equipment |
Eddystone
Manual and
Circuit available for the following Receivers
As a Download
Click Here
|
Circuits
& Manuals
Military,
Radio, TV,
Amateur & Marine
World Wide Service For
Lists Click Here
|
|
Use R/H scroll Bar More information
below
Radio's For Sale
Click Here
Military and
Broadcast
Radio Ads Click
Here |
Military Radio Home
Click
Here If no Index to the left
|
The Eddystone 770U Receiver.
1st picture was suitable for continuous operation in all areas under adverse
climatic conditions.
Frequency Coverage : - 150 to 500 Mc/s in
6 ranges.
Range 1 : - 400 to 500 Mc/s.
Range 2 : - 330 to 400
Mc/s.
Range 3 : - 270 to 330 Mc/s.
Range 4 : - 220 to 270 Mc/s.
Range
5 : - 180 to 220 Mc/s.
Range 6 : - 150 to 180 Mc/s.
Aerial Input : -
75 ohm (nominal) unbalanced.
Power Supply : - Single-phase AC
mains 100/125v and 200/250v (40 to 60 c/s).
Consumption :- 90
volt-amperes.
This unit weighs 52lbs - 23.6kg
|
|
The Eddystone S770R
Receiver.
2nd
picture was a single conversion communications receiver covering the
frequency range 19 to 165 Mc/s.
Provision was made for the reception of CW,
AM, FM and NBFM signals and the receiver operated directly from all
standard AC mains supplies.
Advance design, rugged construction and high
quality components were employed throughout , continuous operation was
possible in all areas regardless of climatic conditions.
|
|
Ease of operation was assured by the convenient
and logical placement of the major controls, while
the directly calibrated scales clearly indicate the frequency to which the
receiver was tuned.
Provision is made for connection of an external
loudspeaker, but where loudspeaker reception was impracticable telephones
could be used.
Facilities were also available for feeding the output from the
receiver over remote lines to a distant listening point.
In addition to
its use as a communications receiver, the S770R had many
applications as a test instrument. |
Eddystone
Manual and
Circuit available for the following Receivers
As a Download
Click Here |
In this role, the wide continuous
frequency coverage, the simplicity of tuning and the built- carrier level
meter were all valuable assets.
Frequency Coverage : -
19
to 165 Mc/s in 6 ranges.
Range 1 : - 114 to
165 Mc/s.
Range 2 : - 78 to 114 Mc/s.
Range 3 : - 54 to 78 Mc/s.
Range 4 : -
39 to 54 Mc/s.
Range
5 : - 27 to 39 Mc/s.
Range 6 : - 19 to 27 Mc/s.
Intermediate
Frequency : -
The intermediate frequency is 5.2 Mc/s with variable
selectivity.
The BFO was pre-set to give a beat note of 1000 c/s.
Aerial Input : -
75 ohm (nominal) unbalanced.
Power Supply : -
100/120volts or 195/250volts AC (40 to 60 c/s).
Consumption : - 90
volt-amperes.
This unit weighs 60lbs - 27.2kg.
|
Eddystone
Manual and
Circuit available for the following Receivers
As a Download
Click Here
|
The Eddystone 680X Receiver.
3rd
picture had a frequency range from 480 kc/s to 30 Mc/s.
It was of the super heterodyne
type and used a total of fifteen valves.
The construction and workmanship
were of a high order.
The 680X operated from standard AC mains.
Frequency
Coverage :- 480 kc/s to 30 Mc/s in 5 ranges.
Range 1 : - 30 to
12.3 Mc/s.
Range 2 : - 12.5 to 5.3
Mc/s.
Range 3 : - 5.7 to 2.5 Mc/s.
Range 4 : - 2.5 to 1.11 Mc/s.
Range
5 : - 1120 kc/s to 480 kc/s.
|
|
Intermediate Frequency : -
The intermediate frequency was permeability tuned to
450kc/s, the coupling between the coils being varied mechanically by a
panel control to give a wide range of selectivity.
The BFO had a
range of plus or minus 3 kc/s.
Aerial Input : - 400 ohm (nominal).
Power Supply : -
100 and 200-250 volts AC (40 to 60 c/s).
Consumption : - 80
watts approximately.
This unit weighs 47 lbs - 21.3 kg.
|
|
The
Eddystone S640 Receiver.
4th picture. |
|
|