Type |
Function |
Peak Power |
Pulse width |
PRF |
Freq |
Notes |
AMES
1 |
CH |
1 Mw |
5-54 uS |
12.5, 25, 50 |
22.7-29.7 MHz |
Figures for later modifications. Earlier systems
had 200KW and 800KW outputs. Some systems designed for 42.5-50.5MHz. First experimental
systems used NT46, then NT57 Then BTH Type 43 or 45 Demountable valves. Earlier
stations had powers from 450-750Kw. T3026 reported as 450Kw, 5-40uS; T3026A
750Kw. May have used transmitters from MB series. Could do Height Finding from
1.5 to 16 Deg. Targets lower than 1 Deg are not detected. |
2 |
CHL |
150 Kw |
3 |
400 |
200 MHz |
PRF Variable around 400. When on 200' tower
or on 200' cliffs, range on target at 500' is 110 miles. Aerial is a 5 bay,
4 stack of dipoles . Horizontal angle of beam about 20 Deg. |
3 |
CH/CHL |
|
|
|
|
Types 1 & 2 in close proximity operating
as one unit. |
4 |
CO |
|
|
|
|
Overseas Chain Home. Also known as Intermediate
CO, or CO/ICH |
5 Mk..1 |
COL |
|
|
|
|
Chain Overseas Low. A version of type 2 for
use overseas, but a few were installed in the UK.. Mk..1 prior to AMES 530.
Hand turned. |
5 Mk..2A |
COL |
|
|
|
|
From equipment No 531. Used a gantry, and
was power turned. |
5 Mk..2B |
COL |
|
|
|
|
As type 5 Mk..2A, but using towers. |
6 Mk..1 |
LW |
85Kw |
|
|
176MHz |
Converted ASV Radar. Early Light Warning Set,
sometimes Early Light Warning. Prototype had range of 18 miles. Two built after
prototype had range of 25 Miles at 6000', 18 Miles at 2000'. Transportable.
Used as Early warning and/or as Locating Radar for 3GHz Gun Control Radar. RAF
version usually tented; Army version usually in trucks. In use Crete 1941. |
6 Mk..2 |
LW |
85Kw |
|
|
176MHz |
Light Warning Set. Also known as AA No 4 Mk..2.
Also known as Type 5124, Transportable Radio Installation. Transportable or
Mobile. |
6 Mk..3 |
LW |
85Kw |
|
|
176MHz |
Light Warning Set. Also known as AA No 4 Mk..3.
Transportable or Mobile. |
6 Mk..4 |
LW |
85Kw |
|
|
176MHz |
Mk..2 modified to work on a lower frequency.
Transportable or Mobile. |
6 Mk..5 |
LW |
85Kw |
|
|
176MHz |
High Frequency Light Warning Set using a multiple
Yagi Aerial. Mobile version only. |
6 Mk..6 |
LW |
85Kw |
|
|
176 MHz |
High Frequency Light Warning Set using a parabolic
dish Aerial. Mobile version only. |
6 Mk..7 |
LW |
85Kw |
|
|
176MHz |
Light Warning Set. Air Transportable. modified
for GCI, using AMES Type 8A Aerial. |
6 Mk..8 |
LW |
85Kw |
|
|
176MHz |
As Mk..7, but using an Aerial from SCR 636. |
6 Mk..9 |
LW |
85Kw |
|
|
176MHz |
Uses Mk.. 3 equipment and associated communications
equipment mounted on a Morris 4x4 vehicle (RVT 430D), and Jeep (RVT 430E) |
6 Mk..10 |
LW |
85Kw |
|
|
176MHz |
Mobile Air Transportable System. TRE version
of Mk..9. |
6 Mk..11 |
LW |
85Kw |
|
|
176MHz |
As Mk..8, but using Steel Gantry instead of
Aerial Trailer. |
7 |
GCI
|
80-100Kw |
3,5 or 8 uS |
300-540 |
192-209MHz |
Final (as in the final version) static GCI
radar known as Happidrome. Effective Range 90 miles. Aerial 30' x 25' comprising
three separate aerials at 7.5', 12.5', & 25'.Can combine these or use separate.
Rotates at up to 8 RPM. Can detect a target at 1000' at 30 Miles. Transmitter
is a CHL type. Height finding between 2.5 and 20 Deg. |
8 |
GCI/CHB |
|
|
|
209MHz |
Interim GCI Radar. Superseded by Type 7 (static)
and Type 15 (Mobile) Some produced at 250-300Mhz as an insurance against jamming.
Mobile with Trailer. GCI Mobile Mk..3 with Hand turned Aerials. |
8A |
GCI/CHB |
|
|
|
209MHz |
Transportable or Semi static. GCI Intermediate
Mobile with Hand turned Aerial, hutted operations and Transmitter rooms. |
8B |
GCI/CHB |
|
|
|
209MHz |
Transportable. Additional 35' Aerial mounted
on Gantry. |
8C |
GCI/CHB |
|
|
|
209MHz |
Had 10' Aerial array as 8F, and extra single
array at 35' high to increase range on low flyers. Used CHL TX T3079. |
8E |
GCI/CHB |
|
|
|
209MHz |
This was the basis for the first Type 15's. |
8F |
GCI/CHB |
150Kw |
|
|
209MHz |
Believed known as "GCI Mk..4". Max
range 60 Miles. TX developed from Type 2. Height Finding effective between 4
and 20 Deg. Accuracy 50' up to 45,000' altitude. Power turned Aerial up to 6
RPM. Aerial was known as the ten foot array, four bays of 8 Dipoles. Instrumented
Range 45 Miles. |
9(T) |
MRU |
300Kw |
|
|
40-50MHz |
Mobile Radio Unit. Smaller CH system used
as gap filler, and before main stations were built 105' tower to support aerials..
Used as buried reserve at CH stations. Also used overseas. Later versions had
four lines of shoot. |
9 Mk..1 |
MRU |
300Kw |
|
|
42.5-43.75MHz |
Transportable or mobile installation with
trailers. All round looking. Called TRU or MRU. |
9 Mk..2 |
MRU |
300Kw |
|
|
40-50MHz |
Special arrays fitted to Mk..1 with hutted
CRDF receiver. |
9 Mk..3 |
MRU |
300Kw |
|
|
40-50MHz |
Similar to Mk..2 with CRHF Receiver. |
9 Mk..4 |
MRU |
300Kw |
|
|
40-50MHz |
Special arrays on ACH towers (TX) Hutted transmitter
and CRHF receiver. Abandoned. |
9 Mk..5 |
MRU |
300Kw |
|
|
40-50MHz |
Mobile version of Mk..3. |
9 Mk..6 |
MRU |
300Kw |
|
|
40-50MHz |
Special Receiver arrays on 105' masts with
CRHF and Receiver 1426. |
10 |
ACO |
|
|
|
40-50MHz |
Advance Chain Overseas. Overseas version of
Type 9, both static and mobile versions. Used 125' towers, four lines of shoot. |
VEB |
Height Finder |
|
|
|
200MHz |
Used a vertical stack of 56 end fed dipoles
on a CH tower. Beamed a fan pattern vertically swung to various elevations by
phase changes between Dipoles. |
11 Mk..1 |
CHL/GCI |
50Kw? |
4 |
500 |
565MHz |
Mk..1 was mobile. Output Device is NT99. Mobile
sets as standby if the 200MHz band was jammed. 600MHz was used by Germany..
Later versions from Mk..5 Were coherent. First versions had rotary spark gap
modulator. Horizontal beam 4 Deg, Vertical 11 Deg. |
11 Mk..2(T) |
CHL/GCI |
50Kw? |
4 |
500 |
500-600MHz |
MGRI 5193. Included two radar vehicles. Prime
mover had operations building with aerial as trailer. Mobile or Mobile with
Trailer Standby. Tuneable over 50-60cm. Used display units DU3 or DU58. |
11 Mk..2(M) |
CHL/GCI |
50Kw? |
4 |
500 |
500-600MHz |
MGRI 5299 Similar to Mk..2(T) except aerial
mounted on prime mover. |
11 Mk..3 |
CHL/GCI |
50Kw? |
4 |
500 |
500-600MHz |
Mobile with Universal operations room with
display unit type 5 and later consuls type 15 & 16. |
11 Mk.4 |
CHL/GCI |
50Kw? |
4 |
500 |
500-600MHz |
Mobile with Universal Operations room with
TX T3585 and Receiver R.3575 in RV435 with dismountable aerial and cabin. |
11 Mk.5 |
CHL/GCI |
50Kw? |
4 |
500 |
500-600MHz |
Similar to Mk.3, but coherent pulse. |
11 Mk.6 |
CHL/GCI |
50Kw? |
4 |
500 |
500-600MHz |
Similar to Mk.4, but coherent pulse |
11 Mk.7 |
CHL/GCI |
50Kw? |
4 |
500 |
500-600MHz |
Similar to Mk.4, but with TX T3605 and RX
R3575. |
11 Mk.8 |
CHL/GCI |
50Kw? |
4 |
500 |
500-600MHz |
Coherent Pulse. Demonstrated PICAO in 1946. |