Some types of navaids, such as non-directional beacons and Distance Measuring Equipment, do not operate on these frequencies; in the case of NDBs, the low frequency and medium frequency bands are used between 190 415 kHz and 510 535 kHz.
32.
For sensing below the surface, the class was given one SQS-501 high frequency bottom profiler sonar, one SQS-502 high frequency mortar control sonar, one SQS-503 hull mounted active search sonar and one SQS-504 VDS medium frequency active search sonar.
33.
Using the benchmarks of the Guild of One-Name Studies ( Spathaky 1998 ), the name Cree was therefore " Rare " in Wales in 1881, of " Low Frequency " in England, and of " Medium Frequency " in Scotland.
34.
Three high-quality, six-tube receivers served the wavelength ranges 120 to 1, 200 m ( medium frequency ), 400 to 4, 000 m ( low frequency ) and 3, 000 to 25, 000 m ( overlapping low frequency and very low frequency ).
35.
Although the basic technology for analog computers is usually operational amplifiers ( also called " continuous current amplifiers " because they have no low frequency limitation ), in the 1960s an attempt was made in the French ANALAC computer to use an alternative technology : medium frequency carrier and non dissipative reversible circuits.
36.
Two models of airborne dipping sonars can be carried by on board Ka-27 helicopters, both being the derivatives of Russian / Soviet V-3 medium frequency ( MF ) Ros'sonar ( also known as Rys, with NATO reporting name Lamb Tail ), with a range around 7 km.
37.
Captain class frigates were fitted with a medium frequency direction finding antenna ( MF / DF ) ( the antenna was fitted in front of the bridge ) and high frequency direction finding ( HF / DF, " Huffduff " ) Type FH 4 antenna ( the antenna was fitted on top of the mainmast ).
38.
The last remaining Balzam class ship in active service is 344 ft in length, mounting a Medium Frequency sonar, High Frequency dipping sonar, Electronic warfare gear to include jammers, interception devices and code-breaking software : these ships were revolutionary when built in that they carried not only intercept and direction-finding electronics but also the necessary computing power to feed raw signal data into on-board information processing computers.
39.
Normally, the low-pass would be preferred with a transmitter, in order to attenuate harmonics, but the high-pass configuration may be chosen if the components are more conveniently obtained, or if the radio already contains an internal low-pass filter, or if attenuation of low frequencies is desirable & ndash; for example when a local AM station broadcasting on a medium frequency may be overloading a high frequency receiver.
40.
As negotiations were taking place the deal fell through leaving Osbourne's and Hadfield's to merge, with the foundry being located on Hadfield's East Hecla ( Vulcan Road ) site, and Edgar Allen's to purchase Jessop's, relocating Jessop's special alloy ( medium frequency ) melting on Edgar's Sheffield Road site and the 3-ton electric furnace at their Imperial Steel Works site.
