According to hardesty (red Phoenix) the Soviet army alone was supplied with over 1474 gun laying radars. Virtually every major warship from Frigate and above was supplied with at least one radar set. VVS was supplied with over 2626 air defence radars according to a summary i have of the the annual lend lease protocols that detail the goods shipped to the USSR by the allies. One estimate of the amount of materiel received from the west places the number of individual sets at over 5000. The Soviets were provided with an extensive spare parts regime and training for all three services.
In addition the Soviet navy, at least, produced a number of indigenous sets, that were most probably reverse engineered from Allied supplied equipment. It has to be said, however that production and usage of inigenous material limited, and virtually non-existent, until the very end of the war, at least for their navy. The information that I have (based on the Nav weapons data) is as follows
Redut-K
Became Operational: 1940
War Status: Used on CL Molotov
Purpose: Air Warning
Wavelength: 4 meters
Power Output: 50 KW
Range: 64.8 nm
Remarks: First Soviet ship-based radar system. Modification of the RUS-2 land radar.
Gyuis
Became Operational: 1944
War Status: Not accepted for production.
Purpose: Air Warning
Wavelength: 1.4 meters
Power Output: 80 KW
Range: 25 nm
Remarks: First in the series of Gyuis air detection radars used on Soviet ships after World War II. The prototype was trialed on the destroyer Gromkii and used on it until the end of the war.
Gyuis-1
Became Operational: 1944
War Status: Installed on several destroyers
Purpose: Air Warning
Wavelength: 1.4 meters
Power Output: 80 KW
Range: 25 nm
Remarks: Used until the end of the war, but not accepted into production
Gyuis-1M
Became Operational: 1945
War Status: Used on Pr. 30K destroyers after the war
Purpose: Air Warning
Wavelength: N/A
Power Output: N/A
Range: about 16 nm air / about 6.5 nm surface
Remarks: Trialed on destroyer Strogyi at the end of 1944.
Gyuis-1B
Became Operational: 1945-6
War Status: Used on many post war Soviet warships
Purpose: Air and Surface Search
Wavelength: N/A
Power Output: N/A
Range: 28.6 against aircraft / 10.25 Surface
Remarks: Tested on the DD Ognevoy in Oct-Nov 1945.
Mars-1 (Redan-1)
Became Operational: 1945-6
War Status: Used on many post war Soviet warships
Purpose: Cruiser Main Caliber Fire-Control
Wavelength: N/A
Power Output: N/A
Range: 9.75 nm
Remarks: Developed in 1945. Tested in July-August 1945 on the Cruiser Molotov. Test went satisfactory and the system was accepted in service as Redan-1.
Mars-2 (Redan-2)
Became Operational: 1945-6
War Status: Used on many post war Soviet warships
Purpose: Destroyer Main Caliber Fire-Control
Wavelength: N/A
Power Output: N/A
Range: 9.75 nm
Remarks: Developed in 1945 simultaneously with Mars-1. Tested in 1945 on the DD Ognevoy. Test went satisfactory and the system was accepted in service as Redan-2.
Vympel-2
Became Operational: 1945-6
War Status: Used on many post war Soviet warships
Purpose: Anti-Aircraft Fire-Control
Wavelength: N/A
Power Output: N/A
Range: about 6.5 nm
Remarks: Used on Pr. 30K destroyers
nav weapons also says this....."Most of the radars used by the Soviet Navy during World War II were from Lend-Lease. The first Lend-Lease radars started to arrive in the USSR in 1942 and by the end of the war most of the large warships were equipped by some sort of radar".
The radars provided to the Soviet Navy were among the latest and best produced by the allies. several sources that I have say that the latest and best technologies of the allies were withheld by the allies, but i have not found any hard evidence to support those claims. certainly the radar suites of their major warships by wars end seemed to be very impressive. this is the thing about research of soviet technologies and lend lease to russia in particular....its full of half truths and downright lies by both pro- and anti soviet supporters. You have to try your best and ddetermine fact from fiction.
Good sources (IMO) for background reading that I would recommend:
hardesty - Red Phoenix
Claws of the bear - The red Army since 1917
Razvitie Sovetskoy Radiolokatsionnoy Tekhniki" (Development of the Soviet Radar Technology) by M.M. Lobanov
"Sovetskie Boevye Korabli 1941-45: IV Vooruzhnie" (Soviet Warships 1941-45: Volume IV Armament) by A.V. Platonov
February 2002 issue of Taifun Magazine Magazine
My opinion is that soviet use of radar by the beginning of 1944 was very extensive and up to date.