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fps
The AN/FPS-20 was a widely used L band early warning and ground-controlled interception radar system employed by the United States Air Force Air Defense Command, the NORAD Pinetree Line in Canada, the USAF CONAD in the continental United States, and a variety of other users. The design started life as the Bendix AN/FPS-3 in 1950, was upgraded to the FPS-20, then spawned over a dozen different variants as additional upgrades were applied. The FPS-20 formed the backbone of the US air defense network through the early Cold War with over 200 units deployed. Most FPS-20 sites were replaced by modern equipment in the late 1960s, although a number were turned over to the FAA, modified for air traffic control use, and became ARSR-60s.
The first AN/FPS-3 arrived in December 1950, slated for installation at Eniwetok Atoll to control aircraft involved in the atomic bomb tests of early 1951. Over the next few years, 48 FPS-3s were installed to replace older systems in the Lashup Radar Network. The FPS-3 and was also produced as the AN/MPS-7, a mobile version. The system used two 5J26 magnetrons at 750 kW peak power, operating at 1300 MHz a 400 Hz pulse repetition frequency (prf) and 2 microsecond pulse width. The antenna was driven at three fixed speeds of 3.3, 5 or 10 RPM, normally operating at 5. Many of the operating modules were mounted on the rotating platform, with the output signals fed via slip rings to amplifiers and displays at the base of the unit.
The FPS-3 was limited to about 55,000 feet (17 km) altitude, which was seen as a limitation in light of new jet-powered bombers known to be in development in the USSR. This led to the development of the AN/GPA-27 add-on unit, increasing the altitude to 65,000 feet (20 km). Installations began in 1956. New-build units from Bendix with this equipment pre-installed became the AN/FPS-20 in 1957. Otherwise similar units with an antenna from General Electric were known as the AN/FPS-20B. The slotted-waveguide antenna pictured above the AN/FPS-20 is for the associated IFF system.The FPS-20s were simple pulse-radar systems and subject to jamming using basic techniques. This led to a second series of upgrades to provide anti-jamming capabilities starting in 1959. Among these were the GPA-102 (MK-448) which turned an FPS-20 into an FPS-64 and a FPS-20A to an FPS-66, and the GPA-103 (MK-447) which turned a FPS-20 into an FPS-65 and the FPS-20A into an FPS-67. Similar upgrades using a Canadian OA-4831 system produced the AN/FPS-87 and AN/FPS-87A. The BADGE 412-L upgrade of the FPS-20A created the AN/FPS-82.
A more major update was the MK-747, which added a new antenna from Raytheon, the Diplex Gating Unit (DGU), a bandpass filter and other modifications, to produce the AN/FPS-91 and 91A. The similar MK-748 applied to the -60 series resulted in the AN/FPS-64A, -65A, -66A and -67A. Canadian AN/FPS-87s were also converted, becoming AN/FPS-93 and 93A. These units were used with the SAGE system.The FPS-20 was widely used in Japan. They produced their own series of modifications, including a tunnel diode based amplifier and a separate receiver for the Airborne Instruments Laboratories system, producing the AN/FPS-20/20A JAPAN, or -J.
The Indian Air Force used the FPS-20 with a new digital moving target indicator (MTI) system from Bendix to create the AN/FPS-100 and 100A. These systems were known as the "Blue Pearl", or Bendix Radar Processor BRP-150. These were remanufactured units with a new antenna, and included a new low-noise front-end amplifier. General Dynamics later produced a similar digital MTI system, the AN/FPS-113.
Like the header says.
FTF. Cash. Only possible trade would be a LNIB G17.5.
First come first served. I will not hold.
PM with any comments, questions, or concerns.
I bought it new last December 2023. Brand new in the box and never used. This is 1/2 the box. I have others that I need to use too so this is extra. I'm in Newberg, Oregon and I can meet you here.
These are real good 9mm ammos. One of my favorites.
15 Boxes of Winchester 7.62x51 149 grain M80 FMJ…. .308 nato
20 rounds per box for a total of 300 rounds
This ammo is for sale at Sportsman's warehouse for $29.99 a box see photos
first $350 cash takes it home. That's just $23.33 a box
must meet up in the Wilsonville area
Thanks for looking...
Berrys bullets 38 cal. 38/357 bullets 125 grain flat nose
this is a 1000 count box
retail on this at Berrys website is $126.99 + shipping
$110 takes these home
my loss is your savings
must meet up in the Wilsonville area
please see other bullet lots for sale
Thanks for looking
****PRICE REDUCED...
OPPS LISTED WRONG PRICE PLEASE LOOK AGIAN
3-250 count boxes 750 total
see photos
this is sold out at Berrys website
$90 for all 3 boxes
must meet up in Wilsonville area
see other bullets listed
thanks for looking
10 boxes of 50 rounds each of CCI STANDARD VELOCITY 1070 FPS 40 grain. Total of 500 rounds
subsonic? is 1070 subsonic?
first $50 cash takes them home. Cabelas has 100 rounds for $12 per/ 100
buyer must meet up in the Wilsonville area
Thanks for looking
more 22LR to post soon!
Federal Top gun 20 gauge 1210 fps 7/8 oz shotgun shells for sale.
4 boxes of #9 shot at 25 shells per box for a total of 100 rounds. This #9 shot can be hard to come by at times.
2 boxes of #8 shot at 25 shells per box for a total of 50 rounds
total of 150 20 gauge shotgun shells in this lot...
Remington 2 3/4 #6 GAME/ upland bird loads. 1 oz 1290 FPS.
3 boxes 25 shells per box for a total of 75 shells.
see pictures retail for these is $13.99 per box so…… $41.97
asking $25 for all 3 boxes
must meet up in Wilsonville area
Thanks for looking
Federal upland 2 3/4 1400 FPS 1 1/8 oz STEEL Shot shells. 25 rounds per box 175 rounds total.
2 boxes of #7 1/2 shot
5 boxes of #6 shot
not upland bird hunting anymore so I have no need for these.
these boxes go for $15.99 and up. $15.99 at Cabelas. So……$111.93 and up value.
listing for $ 90.00...
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I bought this for my varmint rifle but ended up developing some awesome handloads, so here they sit.
This is pretty expensive ammo. Retails for around $2 per round. Check it out.
The reloadable Nosler...