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When an inductor tunes at200Khz with 624pF capacitor and at 600Khz wth 60.4pF capacitor then the self capacitance of the inductor would be?
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What is faster pii 600 mhz piii 600khz Pentium 600mhz or 486 turbo?
PIII 600MHz
Why can you only hear dispatchers voice and not the formans on portable radio?
Most probably because you are using some sort of repeater-based radio system, and you are far from the repeater. Either that, or you are line-of-sight to the dispatcher, but the foreman is located somewhere that is blocked by obstructions. Dispatcher radios are typically "base stations" that have a much higher output power than a portable radio you might carry on your belt. With more power and a more efficient antenna, it's possible for a dispatcher to reach radios in the field, but those radios may not be able to answer back to the dispatcher. If there is a repeater system in use, then typically the radios transmit on one frequency and listen on another frequency separated by the "offset". In ham radio on the 2 meter band this is typically 600KHz....so my local repeater transmits on 147.16 and has a + offset, meaning that it listens on 147.76. My radio listens on 147.16, and when I press the transmit key it shifts up to 147.76. Every other radio that's listening hears the repeater on 147.16, but NOT me on 147.76. Unless of course they're close, and they change to the 147.76 frequency. Then they could hear me transmitting directly, instead of being relayed through the repeater. At VHF and above, line-of-sight is very important. If there are mountains, buildings or other stuff in the way, the radio signal is blocked. This is why so many systems use repeaters; it can be on top of a mountain somewhere nearby, with a clear view of all the radio users in the valley below. VHF is somewhat less line-of-sight than UHF, but you still won't get much if you're behind a mountain. (Even a little one!) Cell phones are very high frequency, but they get away with this by having lots of cell sites (repeaters) scattered all over the place, so there's almost always one within easy range. The cell sites negotiate among themselves to decide who handles your call, and when to hand it off to another site that has a better signal. MGF KC7LZD
Which of the following frequencies falls in the range of rf waves used by commercial radio broadcasting stations a 60 hz b 6000 hz c 600000 hz d 6000000 hz?
The third choice on the list ... 600,000 Hz ... is the same as 600 KHz. That's the "600" (or "60") displayed near low end of the AM radio dial. The first two items on the list are not used for radio communication: -- 60 Hz is the frequency of the AC power that comes out of the household electrical outlet (in North America). -- 6,000 Hz is in the audible range. Current at that frequency is present in every earphone, loudspeaker, and local telephone line. The last item on the list ... 6,000,000 Hz or 6 MHz ... is in the international broadcast bands. It can be tuned on any "short wave" radio.
What does wireless mean in world war 2?
Condensed DATA on British Army Wireless Sets of the numerical period.Click to the set number e.g. Wireless Set No. 19 to see the photograph. More photographs will be added constantly, the final object will be that a picture is available for each Wireless Set listed below. Note that the quality of some pictures is not optimal. When available, better quality photos shall be posted, this will take some time as I have to visit friends and musea to take these pictures. Ultimately more pages might be added with pictures of the interior and accessories, which were either not listed or not being available when both Volume 1 and 2 were printed. For an overview of most of the pictures in this page see also the Army Wireless Sets Image Directory section.Wireless Set No. 1 was a portable transmitter/receiver, developed in 1933. Use: short range Infantry Brigade, Division and RA Regiment communication. Frequency range 4.2-6.6MHz. MO control. RF output 0.5W. R/T and CW. Range up to 5 miles. Replaced by No. 11 Set.Wireless Set No. 2 was a mobile or ground station transmitter/receiver, developed in 1934. Use: medium/short range Division and Brigade communication. Frequency range 1.875-5MHz. MO control. RF output 7W R/T and 10W CW. Range 9 to 30 miles. Small production only.Wireless Set No. 3 was a mobile transmitter/receiver developed in 1934. Use: medium range communication between Corps and Division and Line of Communication. Frequency range 1.3-3.4MHz. MO control. RF output 400W. Range (roof aerial) 25 miles R/T and 50 miles CW.Wireless Set No. 4 was intended as a semi-mobile transmitter developed in about 1930. Use: long range communication between GHQ and Corps HQ. Frequency range 63-375kHz. MO control. RF output 500W. Range up to 200 miles. CW only. Abandoned.Wireless Set No. 5 was a fixed transmitter developed in 1934. Use: long range point to point for Base/GHQ/Corps communication. Frequency range 200-600kHz and 3-20MHz. MO control. RF output 0.5kW (LP)/2kW HP). Range 2000 miles and more. R/T, MCW and CW. Separate receiver.Wireless Set No. 6 was a fixed transmitter developed in about 1934. Use: Army Chain Station. Frequency range 3-25MHz. MO control. RF output 1.5kW. CW only. Range world wide. Only two were made. Separate receiver.Wireless Set No. 7 was a mobile transmitter/receiver developed in 1935. Use: communication between tanks. Frequency range 1.875-5MHz. MO/crystal control. RF output 5W. R/T and MCW. Range 3-5 miles. Unusual shape to fit in bulge of tank. Only a limited number were produced. Replaced by No. 9 Set.Wireless Set No. 8 was a man pack transmitter/receiver developed in 1940. Use: short range communication in Company and Battalion HQ. Frequency range 6-9MHz. MO control. RF output 0.25W. R/T only. Range up to 5 miles. Limited production only. Replaced by No. 18 Set.Wireless Set No. 9 was a mobile transmitter/receiver developed in 1939. Use: medium range communication for AFV and Divisional Signals, vehicle station in truck and ground station. Frequency range 1.875-5MHz. MO/crystal control. RF output 5W/10W. R/T, MCW, CW. Range up to 35 miles. First really successful tank set. There was also a Canadian version of this set, and a later Mk.I Canadian version..Wireless Set No. 10 was a mobile radio relay system developed in about 1944. Use: Line of Communications radio relay providing 8 duplex telephone channels. Frequency band 4.4/4.8 GHz. Range 50 miles (optical). Pulse width modulation.Wireless Set No. 11 was a portable transceiver developed in 1938. Use: general purpose low power set. Used as a vehicle station (truck/AFV), ground station and animal pack station. Frequency range 4.2-7.5MHz. MO control. RF output 0.6-4.5W. R/T and CW. Range up to 20 miles. Very successful design, superseded by No. 19 and 22.Wireless Set No. 12 was a ground station/vehicle station transmitter developed in 1941. Use: general purpose transmitter for Line of Communication. Frequency range 1.2-17.5MHz. MO or crystal control. RF output 7/25W. R/T, MCW and CW. Range up to 60 miles. Normally associated with Reception Set R107.Wireless Set No. 12HP was a vehicle station transmitter developed in 1942. Use: general purpose transmitter for Line of Communication. Frequency range 1.2-17.5MHz. MO or crystal control. RF output 250/350W. R/T, MCW and CW. Range 100 miles R/T or more. Normally associated with Reception Set R107. Is principally a No.12 Set with separate RF power amplifier.Wireless Set No. 13 was an experimental man pack transceiver developed in about 1936. Use: short range Infantry and tank communication. Frequency range 51-64MHz. MO control. RF output 0.3W. R/T only. Range up to 1 mile. Limited issue only.Wireless Set No. 14 was a mobile transmitter/receiver developed in 1940. Use: Short-range R/T communication between a group of HQ tanks or AFV's. Frequency range 290-410kHz. MO control. RF output 5W. R/T only. Range up to 1 mile.Wireless Set No. 15 was a high power static transmitter developed in about 1951. Use: Static transmitter for long range communication, employed in Army Chain Stations. Frequency range 3-25.6MHz. MO/crystal control. RF output 0.5-30kW. R/T (AM and SSB), FSK, CW. World wide range. Commercial Marconi set, renamed Wireless Sender E10. Separate receivers.Wireless Set No. 16 was a high power jammer transmitter developed in 1940. Use: high power transmitter for jamming enemy radio communications in the field. Frequency range 0.86-7.6MHz. MO control. RF output 1.5kW. R/T, MCW, CW. Effective jamming range 25 miles. Limited use and production.Wireless Set No. 17 was a portable transceiver developed in about 1941. Use: small ground station for communication between searchlight Section HQ and detachments, AA batteries or Royal Engineers detachments. Frequency range 44-64MHz. MO control. RF output 0.3W. R/T only. Range up to 15 miles. Accessories and inside views are posted in the Gallery.Wireless Set No. 18 was a man pack transmitter/receiver developed in 1940. Use: portable man pack for short range communication in forward areas between Battalion HQ and Company HQ. Frequency range 6-9MHz. MO control. RF output 0.25W. R/T, CW. Range up to 10 miles. No. 68 Set is similar but with different frequency range. Standard WW2 set.Wireless Set No. 19 was a mobile transceiver developed in 1941. Use: primary developed for AFVs but later also used as general purpose set in truck and ground stations. Frequency range 'A' set 2-8MHz; 'B' set 229-241MHz. MO control. R/T, MCW, CW. RF output 'A' set 2.5-9W. Range 'A' set up to 15 miles; 'B' set 3/4mile. Standard WW2 set.The prototype resulted in the Mk.I, soon followed by the Mk.II and later Mk.III models.RF Amplifier No. 2 increased the range to 45 miles.Wireless Set No. 19 TH was an experimental trials model for the Dutch Army, developed after WW2. Based on a British 19 Set Mk.III, with IC and B set removed, it had an extra frequency range extending the coverage up to 12MHz. MO control. R/T, MCW, CW.After WW2, the Wireless Set No.19 was adopted in other countries, for example the Canadian (USA?) No.19 Mk.II used in the Danish Army and the refurbished Canadian No.19 Mk.III used in theItalian ArmyAfter WW2 a number of Canadian No.19 Mk.III sets were refurbished for use in the British Army. There was also a (believed locally produced) British No.19 Mk.III Special with internal power unit.Wireless Set No. 20 was an experimental SHF radio link developed in about 1942. Use: Line of Communication high power SHF radio link providing 8 speech channels. Frequency band 7cM. Range 1.3x optical path. RF output 40-150W. Pulse width modulation. Experimental set. Only very few made.Wireless Set No. 21 was a portable transmitter/receiver developed in 1940. Use: Infantry Brigade and RA Regiment communication but later also employed as general purpose ground and vehicle station. Frequency range 4.2-7.5MHz and 19-31MHz. MO control. RF output 0.8-1.5W. R/T, MCW, CW. Range up to 5 miles. Replacing No. 11 Set LP. High band (19-31MHz) hardly used in practice. See also the inside and the transmittersection close up.Wireless Set No. 22 was a portable transceiver developed in 1942. Use: general purpose low power vehicle and ground station with facilities for man pack. Frequency range 2-8MHz. MO control. RF output 1.5W. R/T, CW. Range up to 20 miles. General appearance resemble No. 19 Set. Standard WW2 set. See also the inside.Wireless Set No. 23 was a mobile transmitter developed in 1940. Use: Army Corps and Division communication and later general purpose long-range set. Frequency range 1.12-13.55MHz. MO control. RF output 250W. R/T, MCW, CW. Range 1000 miles. Alternative of No. 3 Set. Limited issue only superseded by No. 33 and 12HP Set. Separate receiver (R101 or R107).Wireless Set No. 24 was an experimental mobile transceiver developed in 1940. Use: short range communication between tanks. Frequency range 230-255MHz. MO control. RF output 0.25W. R/T only. Range up to 3/4 mile. Set was abandoned and function incorporated in 'B' set of No. 19 Set.Wireless Set No. 26 was a mobile multi-channel radio link developed in about 1940. Use: Line of Communication multi channel radio link providing six telephone speech channels. Frequency band 85-100MHz. Crystal control. RF output 65-100W. Range 40-60 miles optical. Set is principally a military version of GPO type system.Wireless Set No. 27 was a man pack transceiver developed in 1940. Use: short range Infantry communication. Frequency range: three spot frequencies 22.5 MHz, 23.5MHz and 24.5MHz; receiver 22-25MHz. Superreg circuit. RF output 0.25W. R/T only. Only very few produced.Wireless Set No. 28 was a man pack transmitter receiver developed in 1940. Use: general purpose Infantry short range communication in forward areas between Company and Battalion HQs. Frequency range 6-9MHz. R/T and CW. MO control. RF output 0.25W. Range 3-5 miles. Limited number produced as an alternative to No. 18 Set.Wireless Set No. 29 was a mobile transceiver developed in about 1945. Use: AFV, tank, truck and ground station. Frequency range 'A' set 2-8MHz; 'B' set 235 and 245 MHz. MO control. RF output 'A' set 25W; 'B' set 1W. R/T, MCW and CW. Range up to 25 miles; 'B' set 3/4 mile. Set was developed in Canada as a replacement of No. 19 Set. Limited number produced. Abandoned.Wireless Set No. 31 was a man pack transceiver developed in 1948. Use: short range communication in Infantry Company and Battalion HQ. Frequency range 40-48MHz. MO control. RF output 0.3W. FM R/T only. Range up to 5 miles. Similar to US Signal Corps SCR-300 (BC-1000) with minor modifications.Wireless Set No. 31AFV was an AFV transceiver. Use: short range communication to Infantry equipped with Wireless Sets No.31 and 88. Frequency range 40-48MHz. MO control. RF output 0.3W. FM R/T only. Range up to 5 miles. The set is basically a modified No.31 Set with a separate 12/24V power pack connected to the vehicle's wireless harnessWireless Set No. 32 was a mobile transceiver developed in about 1944. Use: experimental set to obtain comparisons between AM and FM communications. Frequency range 2-8MHz. MO control. RF output 10 W. R/T (AM and FM) and CW. Range up to 20 miles. Set resembles No. 19 Set and No. 22 Set. Limited production.Wireless Set No. 33 was a mobile transmitter developed in 1941. Use: Line of Communication and general purpose medium-power transmitter, used in a mobile station or ground station. Frequency range 1.2-17.5MHz. MO control. RF output 250W. R/T, MCW and CW. Range up to 80 miles. Set is principally a No. 12 Set with RF power amplifier added. Receiver normally associated is Reception Set R107.Wireless Set No. 36 was a portable transmitter developed in 1941. Use: anti-Aircraft defence gun control communication. Frequency range 10-60MHz. MO or crystal control. RF output 25W. R/T, MCW and CW. Range up to 25 miles. Associated receiver Reception Set R208.Wireless Set No. 37 was a man pack transceiver developed in 1941. Use: short range communication for paratroops. Frequency range 340-385MHz. Super regenerative. RF output 0.5W. R/T and MCW. Range (ground) 1 mile; (ground/air) up to 15 miles. Limited production.Wireless Set No. 38 Mk.II was a man pack transceiver developed in 1942. Use: short range Infantry communication. Frequency range 7.4-9.2MHz. MO control. RF output 0.2W. R/T only. Range: up to 1 mile using long 12ft rod. This set has unique design features using only 5 valves. Standard WW2 set. See also the inside and accessories posted in the gallery.Wireless Set No. 38 AFV was an AFV transceiver developed in 1944. Use: short range communication to Infantry equipped with Wireless Sets No. 38. Frequency range 7.4-9.2MHz. MO control. RF output 0.2W. R/T only. Range: up to 1 mile using long 12ft rod. Principally a MK.II version with a 12V DC supply unit and facilities for control by tank crew.Wireless Set No. 38 Mk.III was a man pack transceiver developed in 1944/5. Use: short range Infantry communication. Frequency range 7.4-9.2MHz. MO control. RF output 0.2W. R/T only. Range: up to 1 mile using long 12ft rod. Basically a tropicalised hermetically sealed version of the Mk.II model.Wireless Set No. 42 was a portable transceiver developed in about 1945. Use: general purpose vehicle/animal pack and man pack station. Frequency range 1.6-12.8MHz. MO control. RF output 10W. R/T (AM and FM) and CW. Range up to 25 miles. Limited trial production. Abandoned.Wireless Set No. 43 was a mobile/fixed transmitter developed in 1943. Use: general purpose high power transmitter for mobile or static operation. Frequency range 2-12MHz. MO/crystal control. RF output up to 400W. Range up to 75 miles as mobile station. Canadian development.Wireless Set No. 46 was a man pack transceiver developed in 1942. Use: principally airborne and sea assault (Commando) troops. Frequency Range 3-9.1 MHz. Crystal control. R/T or MCW. Range: up to 10 miles using long type rod. The first full waterproof man pack set. See also the inside and the underside. Accessories are posted in the Gallery.Wireless Set No. 47 was an experimental semi-portable transmitter receiver developed in 1940. Use: experimental duplex point to point duplex radio link. Frequency 500-550MHz. RF output 5W. MO control. R/T and MCW. Range up to 15 miles line of sight. Abandoned.Wireless Set No. 48 was a man pack transmitter receiver developed in about 1942. Use: short range communication in forward areas within Infantry battalions and RA regiments. Frequency Range 6-9MHz. RF output 0.25W. R/T and CW. MO control. Range up to 10 miles. USA development as an alternative to No. 18 Set. See also the transmitter inside and the receiver inside.Wireless Set No. 49A was a mobile transceiver developed in about 1948. Use: AFV and general purpose communication. Intended as a replacement of No. 19 Set. Frequency range 'A' set 25-38MHz; 'B' set 38-42MHz. RF output 15W; 0.4W. FM R/T. Crystal control. Range 10 miles 'A' set; 4 miles 'B' set. Set comprises two units: WS No. 49A (later C40) and WS No. 49B (later B40). Hermetically sealed. Abandoned and replaced by C42/45 and B47/48.Wireless Set No. 52 was a mobile transmitter receiver developed in 1943. Use: general purpose Brigade to Division communication, principally used as a vehicle or ground station. Frequency range 1.75-16MHz. RF output up to 100W. MO control. R/T, MCW and CW. Range up to 100 miles. Canadian design replacing No. 9 Set. Very successful design.Wireless Set No. 53 was a mobile transmitter developed in about 1944. Use: medium power transmitter primarily for semi-mobile installations such as Armoured Command Vehicles but also used as a ground station. Frequency range 1.2-17.5MHz. RF output 250W. MO and crystal control. R/T, MCW and CW. Range up to 500 miles. Associated receiver is Reception Set R107. Replacement for No. 12HP and No. 33 Set.Wireless Set No. 56 was a mobile transmitter developed in about 1944. Use: high powered jammer and Army chain transmitter. Frequency range 200kHz to 20MHz. RF output up to 12kW. MO control. R/T and various other modulation systems. Communication range world wide. Design abandoned.Wireless Set No. 57 was a mobile transmitter receiver developed in about 1943. Use: auxiliary point to point full duplex service link in No. 26 Set station. Frequency range 85-95MHz. RF output 10W. Crystal control. R/T only. Range up to 60 miles optical range.Wireless Set Cdn No. 58 was a man pack transceiver developed in 1943. Use: short range communication in Infantry Battalion. Frequency range 6-9MHz. RF output 0.3W. MO control. R/T only. Range up to 5 miles. Canadian design as a replacement of No. 18 Set.Wireless Set No. 62 was a portable/mobile transceiver developed in about 1945. Use: general purpose for vehicle and ground station, but suitable as a man pack and animal pack. Frequency range 1.6-12MHz. RF output 1W. MO and crystal control. R/T and CW. Range up to 25 miles. Replacement for No. 22 Set. Accessories and inside view are posted in the Gallery.Wireless Set No. 63 was a transportable transmitter receiver station developed in about 1945. Use: Line of Communication static radio station providing two-way teleprinter operation. Frequency range 3-20MHz. RF output 1kW. MO and crystal control. Tone frequency keying. Range up to 1000 miles. Built into trailer or shelter.Wireless Set No. 68 was a man pack transmitter/receiver developed in 1943. Use: short range communication in forward areas between Battalion HQ and Company HQ. Frequency range 1.75-2.9MHz (WS 68P); 3-5.2MHz (WS 68R and T). MO and crystal control. RF output 0.25W. R/T, CW. Range up to 10 miles. Set is similar to No. 18 Set but with different frequency range.Wireless Set No. 76 was a portable transmitter developed in 1943. Use: light-weight self contained transmitter for rear link communication. Frequency range 2-12MHz. RF output 9W. Crystal control. CW only.Range over 300 miles. Normally used with Reception Set R109. See also the inside.Wireless Set No. 78 was a man pack transceiver developed in about 1945. Use: short range Infantry communication. Frequency range 2.960-9.515MHz. RF output 0.4W. Crystal control. R/T only. Range 3 miles. Limited production. Abandoned.Wireless Set No. 86 was a mobile multi-channel radio link developed in about 1948. Use: vehicular mounted radio relay for communication between Division and Corps. Frequency range 50-100MHz. RF output up to 36W. Crystal control. FM R/T. Range 30 miles optical. Renamed into C41/R222.Wireless Set No. 88 was a man pack transceiver developed in about 1947. Use: short range Infantry Company/Platoon communication. Frequency range 38.01-42.15MHz. RF output 0.25W. Crystal control. FM R/T. Range up to 2 miles. Replacement of No. 38 Set.Wireless Set No. 88 AFV was an AFV version of the No. 88 Set, normally used with Wireless Set No. 19. Frequency range 38.01-42.15MHz. RF output 0.25W. Crystal control. FM R/T. Range up to 2 miles. Replacement of Wireless Set No. 38 AFV.Extensive technical details, comprehensive development history, circuit diagrams, alignment procedures, accessories lists, literature and references, vehicle installation drawings and many, many pictures can be found in "Wireless for the Warrior"Volume 1 and Volume 2.
