Clansman radio cost

Clansman radio cost. I've tried 4m from home a few times now, eventually I took down my antenna and nearly gave up. Reviews For: Clansman - Ex UK Military lightweight modular boom headset I've always wanted to get into HAM radio stuff here in the UK, and merge it with my military collecting hobby and get a Clansman radio set. This video looks at the radio in a little more detail The Clansman range of radios consists of several vehicle mounted and man portable radios, most of which can be used on at least one licensed amateur band (with the exception of the PRC-349 and the PRC-344) The smallest of the VHF Clansman radios, 1W power 37-46. It consists of 9 (or 10) radios and their accessories. UK/PRC320 Service Manual Volume 1. This radio is also capable of being mounted on a vehicle in conjunction with the TUAAM. 52. Buy Clansman Radio and get the best deals at the lowest prices on eBay! Great Savings & Free Delivery / Collection on many items The PRC-319 is a 50 Watt modern microprocessor based radio transceiver that transmits in both the HF and VHF bands, up to Aircraft frequencies for ground to air communications. Supersedes original manual from 1979. 4Ah 28V battery. Free shipping on many items | Browse your favorite brands | affordable prices. This is a Racal TUAAM automatic antenna tuning unit or ATU. 04 each. 975MHz frequency range. from United Kingdom. UK/PRC320 Service_Manual Volume 2. The cheapest way to get from Nevis Radio to Clansman Hotel is to bus via British Aluminium which costs $16 - $23 and takes 1h 43m. 00, exclusive shipping cost. An IB3 may This is the Clansman RT-352 / VRC-352 Back-Pack Radio that was mainly used by the Royal Marines. Frequency range is 1. DPM bergan for PRC-350, PRC-351 or PRC-320. +$45. User handbook. SSB is actually USB only, therefore this modification is to add LSB mode for use under 10MHz when required by protocol. § 3. The VRC-353 is the vehicle/shack mounted VHF radio in the Clansman range. Jul 19, 2001 · Bowman Radio Communications System. $38. Built by Racal, MEL and Plessey, Clansman represented a considerable advance over existing radios being offered to the Armed Forces at the time. Army code no. The box along with antenna mount and rods can also be used with a normal broadcast car type radio / CD player or CB to keep your Land Rover looking original with-out fitting a military radio in the vehicle. $10. . Contains installation and operation instructions, vehicle mounting instructions, maintenance details, technical specifications, function check flowcharts and block diagrams. see operating instructions. Nowadays, in the hands of the amateur radio enthusiast, much of this equipment can enjoy a second life. Seller's other items. Z4/6625-99-620-3592. 69 each. Historic price. $37. Clansman represented a considerable advance over All of our popular plans include streaming with the SiriusXM app. Learn more. 84 pages. Ask a question about this product. Maximum power handling is. The PRC-351 is a VHF FM radio with a frequency range of 30-75. Share Dec 22, 2019 · Operating the toggle of the circuit breaker should start the PSU 50A and the front panel fan. Contact seller. It should provide communication between headquarters and fighting forces. This group is dedicated to the Clansman Radio UK/PRC-320 PRC-320-L Military Radios and Plessey PV1313 Auto ATU / PV1311 100W Linear Amp,The Clansman Radio range of Military Radio replaced the earlier Larkspur Radio range,The Clansman Radios still remain in service today but are being replaced by the Bowman Military Radios. Any information found on this group is the for group members only and Based on historic data, today's second-hand price of the Clansman PRC-344 is around: EUR 32. Apr 5, 2014 · With volume production starting in 1977 the first of the new Clansman vehicular sets to be issued to the Army would appear to have been the Transmitter Receiver Radio UK/RT353 also known as the VRC353. The radio can be mounted on the shoulder, chest or back with adjustable quick release straps and holster. Quantity. Most British units use the obsolete Clansman radio Examples Of Less Useful Radios for the Amateur. Reference handbook. kin group, kindred, kinship group, clan, kin, tribe - group of people related by blood or marriage. Please note that in writing this modification instruction I have simplified the explanation of the Help needed! Connecting a Clansman radio headset to a two-pin Baofeng plug. The VMARS Archive VMARS make their entire collection of E-manuals available to the world - free and downloadable without passwords. 00 Kg Equipment Grade: Grade 2 Army Radio E-Commerce Solutions Jan 20, 2023 · The IB-3 seems the most available these days, with some IB-2 available. The 320 is by far the most useful of the Clansman radio range for the amateur community have fun! see operating instructions. The PRC-349 is an VHF/FM transceiver intended for personal communication in combat conditions. Following the mask's replacement by the General Service Respirator in 2011, the S10 is now widely available to the public on the army surplus market. Quote user handbook. Submitted by. in England. Availability:Out Of Stock. HL Deb 19 July 2001 vol 626 cc1592-9 1592. W. Aug 3, 2010 · The 320 is a even simpler set up, antenna lead connected to antenna base as pic. A high power (2 Watts) output version was also available and any 10 MHz block in the range 30 – 76 MHz could be supplied. Griffith and starring Lillian Gish. A one stop shop for (almost) everything related to our beloved Clansman radios! Repairs: Check out the repair tips section for advice on how to repair your Clansman equipment when it goes wrong (it's all pretty old, so it won't be long before you need to get the screwdrivers out!) Operating: Some simple, easy to read Feb 23, 2011 · As in the title, a little little look round the controls of the VRC-321 transciever. Oct 22, 1998 · This is the Clansman 5. clansman radio's are a growing collector's and operators hobby for young and old. It is primarily designed as an HF vehicle station for mobile ground-wave operation, but can also be used as a ground station or for sky-wave operation over long distances. Clansman UK/PRC-319 was a military manpack radio, introduced in 1985 by Philips subsidary MEL in Crawley ( UK ). other end is simply connected to the radio via. Racal Clansman Bowman RA195 AFV Crew Headset, Tested [CL12E] £39. clansman - a member of a clan. 975Mhz 0. Battery Axxessories designs and manufactures a broad range of devices, including AN/PCR-148, MBITR Batteries, MBITR Chargers and MBITR Adapters. 8 million; 1994–95: £10. First and Second Line Servicing. Not that easy to carry either. Rays-Tek Surplus Ltd. com. Qty. We ship to UK and worldwide via insured courier service. From £13. The PRC349 was added to the Clansman family in 1972. 4 billion, is too heavy for the average soldier to carry, a report by MPs has revealed. The Bowman C4I system consists of a range of HF radio , VHF radio and sets designed to provide secure integrated voice, data services to dismounted soldiers This is the standard Clansman Interconnecting Box 3-Radio or IB3. armyradio. 75-29. The Clansman Elevated Ground Spike Antenna EGSA fits on top of this Clansman Installation into CVR (T) Sultan. More details What is the fastest way to get from Nevis Radio to Clansman Hotel? CLANSMAN definition: 1. 31 shipping. or Best Offer. Two Clansman 24 Volt 1 or 4 Amp Rechargeable batteries as used with the Clansman PRC-319, PRC-320, PRC-344, PRC-351, PRC-352 radio sets. 975 MHz range, voice (FM) transmission Mode. Additional "Rocket" pouches can be found easily (but not available in stock) Grade 2 (broken zips, rips etc £20) Used £30, new £45, new in packing £50. 7 million; 1995–96: £10. Clansman is the radio system used by the British Army. The PRC-349 was revolutionary in its day as it was far lighter and had far greater range than earlier models and was designed to be easy to repair by its inovative use of plug in modules. (31018) Business. The radio is designed to be fully compatible with the existing range of Clansman VHF equipment, 350-351-352-353 etc. uk. Army radio. 4 or more for £9. EX BRITISH ARMY CLANSMAN RADIO 250 WATT HF TURF (ATU) internal assembly. Clansman radio and communications equipment and spares, electronics - new and used. § The Parliamentary Under-Secretary of State, Ministry of Defence (Lord Bach) My Lords, with the leave of the House, I shall repeat a Statement made by my right honourable friend the Secretary of State in another place. We would like to show you a description here but the site won’t allow us. You have the option of choosing a streaming-only plan if you prefer listening to SiriusXM exclusively on your phone and other smart home and mobile devices. The PRC-352 is a 20 Watt portable VHF (FM) Radio using a clip on external RF amplifier, made by RACAL BCC Ltd. Product Code:UK/PRC351M. Tags: Clansman Radio. About: Clansman (military radio) Clansman is the name of a combat net radio system (CNR) used by the British Army from 1976 to 2010. The PRC‐320 is a mobile HF radio covering a frequency range of roughly 2‐30MHz. How do I get started? Mar 10, 2007 · A new radio system for the Armed Forces, developed at a cost of £2. 5 to 40 MHz with LCD frequency readout. Will be tested on an IBMU for >90% capacity but no guarantee how long they will last! Non workers (easy to re-cell) depending on cosmetic condition. Frequency selection is by small thumb wheels on the side of the radio. SKU: 1420: Weight: 10. These batteries are older and heavier than the plastic ones, but look more authentic. Buy 3 £11. 92 per month for 24 months with. The Clansman Radio System introduced a range of new VHF antennas which, with one exception in the form of the GSA (ground spike antenna), required no frequency specific adjustments unlike Larkspur predecessors. The Clansman family of Military Radio Sets comprises nine main radio units, operating in the High Frequency (HF), Very High Frequency (VHF) and the Ultra High Frequency (UHF) Radio Bands. $50–100 million [4] The Birth of a Nation (full film) The Birth of a Nation, originally called The Clansman, [5] is a 1915 American silent epic drama film directed by D. 1. It has Clansman compatibale squelch and whisper mode of operation Jan 3, 2000 · It was even suspended from Nato's list of acceptable weapons and the faults discovered so far have cost over £24 million to rectify. clansman-radio. The screenplay is adapted from Thomas Dixon Jr. During the lifetime of the Ferret, both Larkspur and Clansman were in use. RT351/2 or 353) . fellow member, member - one of the persons who compose a social group (especially individuals who have joined and participate in a group organization); "only members will be Jun 18, 2022 · Today i do a short video on how to tune up the old clansman prc 320 radio this one is loaned from m6osd for the benefit of this videoEven though i did used t The antenna box ix intended for vehicle radio installations such as Clansman VRC-353. Has 5 pin US U-229/U style Connector. The British Army Clansman UK VRC-322 250 Watt, high power HF radio station. 99. The intermediate VHF manpack, 2W power, frequency range 36 clansman-radio. Rechargeable battery for PRC-351, PRC-344, PRC-320. VRC-321. Eight mast sections MS-52. If anyone is able to give me concrete help I'd greatly appreciate it. *Note: Qty This Item Is Not Available! Adapter Unit. Compatible with the infantry helmet of that time, they have a boom mounted noise Noun. BRIEF DESCRIPTION The Clansman radio harness is a series of interconnected control boxes designed to permit the operation of one or two fitted sets from any of three crew positions. Clansman Radio. Condition. ext ernally via the radio sets. 25V should be available at the 2 pin socket. £295. Base loaded rubber coated battle whips for 349, 350 and 351/2. m. Trying to establish a contact on the 4m band. 00:00 Introduction01:02 Close up of the radio05:05 Cooking Aug 21, 2020 · Here the 350 can be seen in use with a soldier on exercise: The radio can broadcast and receive on 841 different channels and these are set to predetermined frequencies by using the four dials down the side of the radio. The intermediate VHF manpack, 2W power, frequency range 36 Apr 12, 2017 · Bob. The radios are: HF radios: UK/PRC 316 UK/PRC 319 UK/PRC 320; UK/VRC 321 Description. Was: $40. 57 p. 3 million. (The PRC-350, in some sources. •PRC 319: built only by MEL ( so unofficial Clansman family member) – Man portable, VHF/HF 1. 4 meters. The specialized batteries being produced include CLANSMAN ARMY MILITARY RADIO UK/PRC351M VHF FM MANPACK. 54. Many vehicles, such as 01 DC86, were retrospectively upgraded to Jun 13, 1996 · The cost of spare parts for Clansman for each of the last three years was as follows: 1993–94: £9. The Red indicator lamp should illuminate. Two required for dipole. These estimates are based on the following prices: Year. Enclosed carry system (unlike the frame) so storage of ancilliary items is easy and convenient and offers protection from rain. The radio was intended for use by the Special Forces (SF) of the UK , the US, Australia and New Zealand. The Manpack sets There are principally three manpack sets in the Clansman series that are useful to the radio amateur; these are the RT320 (PRC320) HF Transmitter-Receiver, RT351 (PRC351) and The Wireless-Set-No. Customs services and international tracking provided boss01380 (2,309) 100%. For the open exchange of information and opinions about collecting, restoring, maintaining, and operating the Wireless Set No. Volume 1. co. The Bowman C4I system consists of a range of HF radio, VHF radio and UHF radio sets designed to provide secure integrated voice, data services to dismounted soldiers, individual vehicles and command HQs up to Division level. 99 each. Clansman radio test kit. DPM radio bergan. 4 Meter antenna mast kit. The PRC 351 has 4 watt RF power output, and operates in 30-75. However, if you choose a plan that provides SiriusXM car radio service, you also get the SiriusXM app for streaming on your devices. The S10 CBRN Respirator is a military gas mask that was formerly used within all branches of the British Armed Forces. Nov 5, 2011 · How to use and test a Clansman Radio Hand Generator #1 From www. Sep 2, 2014 · Following on from Part 1 of Larkspur to Clansman, we continue with an overview of the manpack sets and antenna systems used for vehicle installations. Older style metal cased varaiant. It replaced the aging Larkspur radio Oct 28, 2019 · The Clansman PRC-349 was the main personal radio used by the British Army from its introduction in 1972 until it was finally replaced by Bowman in the 2000s. If not, my apologies. 25 watts. Troops were trained to be able to set these at night in the dark by counting the number of clicks they turned each dial: The Clansman- series was used by the British Army from 1976 to 2010. The Clansman VHF Ground Spike Antenna “GSA” kit is a man-portable ground mounted antenna for use with the Clansman PRC-350, PRC-351, and PRC-352 radio stations. Product Name: CLANSMAN MILITARY UK RT 349 RADIO POUCH OR BOWMAN PRR. Jan 27, 2019 · Took out the Clansman 352 on a walk to local high ground. VRC-353 radio, covers 30-75MHz, 50W output power. 19 Established & Designed in England 1940. REM Remote operation with handset or remote combining unit over D10 field telephone cable. $95. The Clansman range of radios consists of several vehicle mounted and man portable radios, most of which can be used on at least one licensed amateur band (with the exception of the PRC-349 and the PRC-344) The smallest of the VHF Clansman radios, 1W power 37-46. « on: March 17, 2016, 03:42:30 pm ». Mute O/R Overrride receive squelch to listen for weak signals. Multi-buy: Buy 1 £12. May 22, 2024 · GENUINE SAS BRITISH METAL BERGEN / CLANSMAN RADIO MAN PACK FRAME BRITISH ARMY. Buy 2 £11. com Clansman Elevated Wide Band VHF Antenna Kit The Pineapple Antenna. 's 1905 novel and play The Clansman. I'm attempting to connect a Clansman radio headset and PTT (old British military gear) to a standard Sep 13, 2010 · LOCAL Use with normal Clansman headset and microphone. The power adapters on offer include lightweight NATO Slave plugs, -XX90 plugs and sockets. Condition: Used. New stock added regularly. Operating modes are AM, CW and SSB. Built by Racal BCC. I have decided to try once more but to arrange some activity m User handbook for radio station UK/PRC 320. Units supplied to the British Army operate in the 37 – 46. Sponsored. Brands RACAL. A modification is possible to convert the radio to work at 29MHz on the 10m band as well (see modifications section) Power output is around 4W, upgradeable to 20W with the addition of the clip-on 20W amp, which in turn Clansman was in use by British forces from the late 1970s and saw service in most recent UK military operations. clan member, clanswoman. g. 975 MHz range with possible 1840 channels. 16. The VRC-322 radio system has been designed and developed by MEL Communications Ltd in Crawley, England for mobile or static use. Clansman was developed by the Signals Research and Development Establishment (SRDE) in the 1960s, to satisfy a General Staff Requirement (GSR) laid down in 1965. Kevlar protected wire, very durable, with meter markers to find the length quickly. Separation and clean up is required Jun 16, 2014 · Radio Station. Add modification to extend the Oct 2, 2022 · I spend the night at the barn in the Peak District and operate the Clansman PRC320 military radio. Grade 2 available at £15 each, grade 1 £25, new £35 each. 00. It was replaced in the mid-2000s by the new Bowman communication system. Check the next video to see the first QSO, I che 3D printed resin Larkspur Radio for British military vehicles from the 1970s to 2000sIncludes:321322TURFSURFVHF250 Amplifier3 x TUAAM Boxes4 x crew control boxes (1 x Commanders, 1 x driver, + 2 x crew box)Check out our other set ITA335027 - Clansman Antenna Bases NOTE: ITA3 3D printed resin parts are supplied attached to supports. NSN: 5820-99-637-0735. The 350 is just as simple as the 350 to use, with a little more range and a little more weight. Quantity: Box office. 349 Radio. The IB3 is the main unit in the Clansman vehicle harness. 5. Land Rover Chassis Plates Available. Grade 1. All of our radios have a 30 day warranty and will exchange for one of the same. More Clansman Radio Headset. May 1981. 6. Clansman Radio general purpose bag. There are 6 lightweight strong hollow fibreglass tubes that push fit in to one another for a total height of 5. RF power output is 0. Oct 22, 1998 · Grade 2. THIS FIXED PRICE SALE IS FOR A NEW RADIO POUCH FOR MOUNTING ON CHEST WEBBING OR WAIST BELT OR WEBBING. a person, especially a man, who is a member of a clan (= a group of families who originally came…. The Clansman range of radios was a complete tactical radio communications system for the British Army that was compromised from the following radios: UK/PRC316, HF portable radio, fixed channels, formerly known as Larkspur A16 Patrol Radio; UK/PRC319, HF / VHF Portable Patrol Radio; UK/PRC320, HF Portable Radio; UK/VRC321, HF Vehicle Radio Built by Racal BCC. The GSA can quickly be assembled on a level ground. The Clansman UK/PRC-351 Radio is an intra-platoon level backpack VHF FM transceiver. Get the best deals on Clansman Radio In Collectible Military Surplus Radios when you shop the largest online selection at eBay. UK/PRC-320. 975Mhz in 25Khz steps giving around 2000 available channels, and a maximum output of 4 Watts RF, or 20 Watts when driving the 20 W RF amplifier. is not mentioned under "Clansman"). $9. This station is essentially a VRC-321 with a additional 250 Watt RF Amplifier and a suitable high power Antenna Tuning Unit TURF. 4 x Clansman PRC 349 radio Battery Cassette. S10 NBC Respirator. Nice bit of kit but basically the function is to automatically match an antenna to the radio set and feed without any technical knowledge. Clip retainer, lead electrical (5999-99-637-0880)into the whip antenne socket on top of the radio set. After a delay of 3-10 seconds, which allows the regulator circuit to stabilize, DC output of 26. £185. The Clansman lightweight military/infantry headphones were manufactured by Racal-Tacticom LTD, and available in (approximately) 1977 for use with the Clansman series of Army radios such as the PRC-349, PRC-350, PRC-351, and PRC-352. In our latest talk from home, Terry G4UEM introuduces us to the Clansman. Clansman is a complete tactical radio communications system used by the British Ar Bowman (communications system) Bowman is the name of the tactical communications system used by the British Armed Forces . The mast requires a ground area of approximately 6 meters for the erection of the mast and tie down ropes. 975MHz, which covers the 4m and 6m amateur bands. Home Page. This was usually bolted to the front of a Land A key focus of the company is the latest MBITR Radio Systems. Brand New. Griffith co-wrote the screenplay with Mar 17, 2016 · Racal Clansman TUAAM military antenna tuner unit teardown. 80. It provides the Intercom Amplifier, local/remote rebroadcast and a stabilised DC power supply for the rest of the harness and can be connected up to three Clansman radios. 00 shipping. Manufacture was by Marconi Space and Defence Systems or its various contractors. and can't identify it, but it looks a lot like an IB-2, but not quite. Firstly I hope this is the correct/appropriate forum for this question. From Aircraft parts to Clothing and Helmets. We sell MOD, RAF, EU and Army Surplus. The radio is basically a Clansman RT-351 / PRC-351 with the addition of a 20 Watt Amplifier. Orientate it as indicated in fig. 61123. The Statement is as follows: Dipole wire coil for use with centre junction. The antennas were: Rigid sectional VHF whips for 349, 350 and 351/2. 74 each. 19 and other HF radios used by the Allied forces during and after World War II. AUTO Re-Broadcast (when linked to remote terminals of another radio e. Price. 975 MHz in 25kHz steps. Vintage Clansman SN 5965-99-520-2686 / #K PKL 2181. Or two 14. VRC-353. The Clansman radio family consisted of 7 main sets (UK/PRC-320, UK/VRC-321, UK/PRC-344, UK/PRC-349, UK/PRC-350, UK/PRC-351 and UK/VRC-353), two sets made from the 321 and 351 with add on power amplifiers (UK/VRC-322 and UK/VRC-352) and two others (UK/PRC-316 and UK/PRC-319) that are part of the same numbering scheme but not, in terms of age or technology truly Clansman. Harness intercorm, rebroadcast and power supply facilities are controlled from the Interconnecting box 2—radio IB2. The British Army Clansman UK RT-321 / VRC-321 HF system has been designed and developed by MEL Communications Ltd in Crawley, England for mobile or static use. By g7jwr August 31, 2012 in British Radio Equipment. 2010. Price: Euro 100. The radio can be fitted with an Electronic Message Unit (EMU) for burst transmissions ( ECCM ). Converts 7 pin Clansman audio to US style audio equipment. •PRC 349 : Portable VHF 37 -46. Different application - the BID-250 (and the less well documented BID300 for the UK/PRC-351M) was used for secure speech on VHF nets using 16KBits/s CVSD digital encoding followed by non-trivial encryption (and requires 8KHz bandwidth in a UK/VRC-353 using "wide data" mode or a UK/PRC-351M using audio socket 2) - the HF UK/PRC-320 and 319 PRC-351/2. Clansman is a combat net radio system with these characteristics, and was developed from Larkspur, which was the first combat net radio system used by the British Army with its HF C13 and VHF C45 sets. I took my foundation exam in November 2011 (M6FYI), did my intermediate exam (a surface mounted SDR receiver project) in March 2012 (2E0ERV) and passed my advanced in July 2012 (M0SLK). $50. Please view my shop sales for all things CLANSMAN, if what you are looking for is not available please email or phone as I may have it or be able to order it. May 14, 2024 · Clansman Radio Racal Antennas 12m Telescopic Push Up Mast. 100% positive. What a great bit of kit. Patience did pay off for me, because I found something much better and checked off a box on my "dream radio" list: I had found a non-functional PRC-138 for sale very cheap on one of the HAM forums and managed to patch it up to full-function with literally $0 (disassembled, reseated all modules, plugged in a loose power cable, and tweaked a worn Aug 31, 2012 · British Radio Equipment ; Clansman PRC-320 Yahoo USer Group Clansman PRC-320 Yahoo USer Group. Was there an IB-1? I found the following CLANSMAN RADIO LINES BOX (ANR) 5820 99 156 3548 5820991563548 SD0/269743 FE9518M0003 BOX ASSEMBLY,RADIO. Thanks to the guys at Andover radio Club for all their help along the way! The PRC352 is a VHF FM radio with a frequency range of 30 to 75. 5-40Mhz up to 50W – 10 pre programmed channels – Fully automatic ATU which can be located < 50 metres from the transceiver using coax. Clansman was developed by SRDE in the 1970s, to satisfy a General Staff Requirement (GSR) laid down in 1965. This VHF FM Transceiver covers 30-75. A one stop shop for (almost) everything related to our beloved Clansman radios! Repairs: Check out the repair tips section for advice on how to repair your Clansman equipment when it goes wrong (it's all pretty old, so it won't be long before you need to get the screwdrivers out!) Clansman Ground Spike Antenna5820-99-620-5950. July 1990. Price History Chart. 4 volt 4 Amp Rechargeable Batteries that are typically used with the Clansman PRC-350 radios, or one of each type. The UK/RT (Radio Transceiver) 320 is a simple Manpack radio transmitter which can operate in the 2-30MHz range with 100Hz increments, using the SSB (USB only) AM, or CW Morse (Narrow/Wide) Operating Modes. The 321 covers the same PRC-350. It is known that 350 units were made for the British Special Forces. Clansman radio 350. For organising operating events with the broadest possible participation. Service Manual for HF Radio Type RT320. We supply a full range of clansman radio equipment and ancillaries, manpacks to fit into land rovers, FFR and non-FFR and all the hard-skinned fighting vehicles. 82 shipping estimate. The PRC 355 radio, used at Section/Platoon level as a replacement for the Clansman PRC 351/2 Bowman is the name of the tactical communications system used by the British Armed Forces . vp pi rj xf rs kk hn vy tu bu