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Amp Adder Analogue Switch-Off A18QR aerial Arcon Dish Atticbox Audio Adapter USB AV equipment BBC/ITV outside UK Bedroom sound Best aerial Cable Info. Cable Kinked Cable specs thin_cable.htm CAMs etc. Capacitor Kits Channels Chimney Brackets Coaxial Cable Cable Specs Cable - Which? 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Contact Us		UHF filters, Amps Contents TV+Radio distribution amplifiers Masthead amplifier Power Supply Units UHF/FM/DAB Masthead Amplifier UXF4 UHF/FM masthead amplifier Variable gain masthead Amps by Antiference Variable gain masthead Amps by Wolsey Variable gain masthead Amps by Vision Combined signal Amp 8-way amplifier UHF Bandpass filters Double notch filter UHF Aerial Diplexers Before you buy aerial equipment, please read our "Freeview Bible" eBook. Before you buy an aerial, filter or diplexer, please read our Technical Information. Amplifier notes:- In general, there is no need to fit 75 Ohm terminators to unused amplifier or Loft Box outputs. Those amplifiers and Loft Boxes with an unused input might require a terminator to prevent interference. Where an amplifier is stated to have, for example, a 7dB gain, this refers to the amplification given to every output signal compared with the input signal. fa TEL80 Simple mains-powered booster with gain control Connect this at the start of a long cable to overcome losses in the cable and/or in a splitter. Boosts FM/DAB radio and UHF TV signals. Size: 145 x 65 x 35 mm Frequency range: 47-862 MHz Gain: 13 - 25 dB max. (adjustable) Gain control under plastic hinged cover Noise Figure; 5 dB typical Power supply 230v AC +/- 10% Fig. 8 mains cord with UK plug supplied Output level (DIN45004B) > 112 dBuV Power consumption: < 2 Watts Protection index: IP 20 (splash resistant) Input socket requires male TV plug Output requires female TV plug or male with COLCM adapter TEL80 Televes 5527 variable amplifier £17.99 Qty TV+Radio Distribution amplifier with 2 or 4 outlets Connect UHF source (or TV aerial) and VHF radio aerial to the inputs. (Photo shows "F" connectors with plastic dust caps fitted). You should use a decombiner or Diplex wall plates to separate VHF and UHF signals. Antiference A240L Pro 4 way amp F conn. VHF+UHF 10 dB with 13A mains plug £18.99 Qty Antiference A240LR Pro 4 way amp F conn. VHF+UHF 10 dB (adjustable) with 13A mains plug £25.99 Qty Specifications: 1 VHF input 85-240 MHz. ("R" has Variable input attenuation 10 dB). 1 UHF input 470-862 MHz. ("R" has Variable input attenuation 10 dB) and TETRA filtering. 4 outputs with 10 dB gain. Less than 3.5 dB noise. 92 dBuV max. Automatic Line power on UHF input 12v 50 ma for masthead if fitted (green LED) Mains power 230v (red LED) TV+Radio Distribution amplifier with 8 outlets The Labgear MSA283LP is powered by a separate Power Supply Unit that can be situated near any convenient power socket. No need for a socket in the loft. Ideal for DIY installation because it needs no power in the loft. The PSM114 PSU feeds power up the coaxial cable that originally connected the TV point to the TV aerial. Change the TV wall plate for a non-isolated wall plate. If a radio signal is required, use a TV/Radio diplex plate instead and connect an FM or DAB radio aerial to the MSA283LP in the loft. Uses only 'F' plugs to ensure a good connection, low losses and easy fitting. 8dB UHF gain at each output. 3dB noise figure. SkyLink compatible The MSA283LP can send remote commands back to the RF2 socket on a Sky Digibox or to a tvLink-Plus. Labgear MSA283LP 8 way amp F conn. VHF+UHF 8 dB with separate PSU £24.99 Qty Fringe WB1214 wide band masthead amp This masthead amplifier can be fitted to the aerial pole or in the roof space as close as possible to the aerial. It receives its 12 volt power feed from the P1235 power supply which can be fitted anywhere in the coaxial cable leading from the aerial to the VCR or TV but the cable must not have anything connected that will block the power (such as an isolated wall plate socket or a "Y" splitter). Connections should be coated with silicone grease if installed outdoors. Wide band covering channels 21 - 68 Gain: 14 dB Gain spread (flatness): +/- 1 dB Noise figure: 1.9 dB Output: DIN 45004 - 100 dbuv Power requirement: 12v DC at 10 ma Fringe WB1214 wide band masthead amp £10.65 Qty Include Fringe P1235 power supply £13.95 Single Output Power Supply P1235 power supply to be installed as described above. It has a moulded UK 3-pin plug on a 145 cm (just under 5') lead. Requires an adjacent 230v AC power socket. TV plugs should be soldered to cable. Fringe P1285 power supply £13.95 Qty Alternative version with threaded 'F' connectors:- Fringe F1285 power supply £13.95 Qty Specifications: Output power: 12v DC at 85 ma max. (short-circuit resistant) Indoor mains operated: 230v AC 50 Hz +/- 10% 2 Watts Moulded 13 Amp plug with 3 Amp fuse fitted Through-loss VHF/UHF: 40 to 860 MHz less than 1 dB LED indicator: mains ON Size: W 110 x H 76 x D 40 mm Mounting: 2 hole (screws not supplied). Also see twin-output power supplies, below. Twin Output Power Supply Fringe P1285/2 power supply 2 TV outputs 12v/85 ma £17.95 Qty TV plugs MUST be soldered to the cable for use with this P1285/2. Fringe F1285/2 power supply 2 F outputs 12v/85 ma £17.95 Qty F1285/2 requires 'F' plugs. Why would you need these power supplies? These power supplies do the same job as the P1285/1, above, but they have an internal splitter feeding two output sockets to feed two separate television systems. This is handy if you are sharing an aerial with a neighbour or if you need to run a cable to a second TV. They can supply up to 85 ma of current and are fine for the WB1214 masthead amplifier, above and our DAT45 and DAT75 aerials if they are equipped with an MRD (See Televes aerial page). Why would you use a masthead amplifier? 1. You would normally use it where the signal provided by the aerial is slightly too low to feed a long cable and it is not possible to improve it by replacing the aerial with a better type. You would also use it where the signal is adequate but where the cable is picking up interference and can not be replaced with a better type of cable. (In the latter case you would fit an attenuator at the far end of the cable. This will reduce the signal to its original level AND reduce the level of interference. 2. You would use it in conjunction with a splitter or a PSU incorporating a splitter, to boos the signal before it is reduced by splitting. It is important to install the amplifier fairly close to the aerial because the cable between the aerial and amplifier can pick up interference, especially from mains wiring in the loft and from passing traffic. The amplifier will boost this interference so you should minimise the length of cable AND you should use double-shielded cable between the aerial and the amplifier. It is also recommended that you use double-shielded cable for the down feed from the amplifier. IMPORTANT: When a power supply is used to feed an amplifier upstairs, any wall plate MUST be a non-isolated type, otherwise the aerial signal will get through but the DC power won't. An isolated (decoupled) plate is often marked with a capacitor symbol -||- so if yours has this (or obviously has capacitors fitted inside) it won't work. In addition, any "TV plug" between the PSU and amplifier must be soldered to the cable, otherwise a poor or intermittent connection is likely to interrupt viewing now or in the future. SAFETY NOTICE: Electrical equipment which is installed in a loft or roof space should, wherever possible, be mounted on a brick or concrete surface. There have been rare instances of equipment catching fire so every precaution should be taken to prevent spread of fire. Powered equipment needs good ventilation and should be kept away from flammable materials such as cardboard, paper, plastic etc. Where a separate power supply is used, mount it on a wall with good ventilation. On no account lie it on a carpet or rug. We can supply all "Vision" products. If you don't see what you need, please ask.   VISION V20-3127 Masthead/Loft UHF/FM/DAB, Amp 27 dB FM Gain 2 dB DAB Gain 4 dB UHF 17-27 dB Variable Gain Max input 79 dBuv Noise figure 1.4 dB British designed and built specifically for UK digital TV. Lowest noise figure in class. Pulls in weak signals for steady picture and clear sound when lesser mastheads cannot. Gold plated connectors and compartmentalised internal screens improve shielding. Almost impervious to local interference. Top quality components and superior plastics ensure fit-and-forget and long life span. Meets latest specs for low energy. Operate from 5V to 13V without performance degradation. Drive from DTT receiver with 5V line powering or from existing 12V supplies. Aerial inputs (3) with single output to decombiner (triplexer). Connections should be coated with silicone grease if installed outdoors. Amp and PSU use 'F' plugs. Please choose plugs to match your cable. Requires Diplex wall plates to separate UHF and VHF (or the triplex decombiner shown below). C12571 Masthead UHF/FM/DAB 27 dB Vision Gold Variable Gain £19.95 Qty C46367 PSU 12V £9.95 include C21547 FM+DAB+UHF decombiner £9.95 include Or buy separately, below. 12 volt 100mA Power Supply C46367 PSU 12V Vision £9.95 This 12v PSU supplies 100 ma max. Qty FM+DAB+UHF triplex decombiner V24-310 FM+DAB+UHF decombiner Vision (V24-310) (triplexer). A mast mounted Vision Triplexer for UHF (470-862 MHz), FM (87.5-108 MHz) & DAB (216-240 MHz). Gold F-Connectors. Shielded & internally compartmentalised electronics. Insertion losses <0.6 dB for UHF, <0.4 dB for FM & <0.5 dB for DAB. DC Pass of 12v 100 ma on UHF output allows power to pass to a masthead amplifier if required. C21547 FM+DAB+UHF decombiner £9.95 In weatherproof plastic housing. Qty   UXF4 masthead/loft amplifier 10 dB per output - Click HERE for full info Amp and PSU use 'F' plugs. Please choose plugs to match your cable. UXF4 2 IN-4 OUT MASTHEAD inc. PSU £23.95 Qty   UXFR2-20 UHF masthead amplifier with 2 outputs and variable gain   2 outputs Gain adjustable 10 - 20 dB Noise less than 3.5 dB Max output 98 dBuV Built in F-box spanner LED power indicator Includes PSF1200 12 volt/100 ma power supply (needs at least 50 ma) Amp and PSU use 'F' plugs. Please choose plugs to match your cable. UXFR2-20 (2 OUTPUT) MASTHEAD inc. PSU £25.95 Qty UXFR4-20 UHF+ radio masthead amplifier with 4 outputs and variable gain Requires Diplex wall plates to separate UHF and VHF. 4 outputs UHF Gain adjustable 10 - 20 dB VHF gain 6 dB 2 input (UHF and FM/DAB/VHF radio) Noise less than 3.5 dB Max output 92 dBuV Built in F-box spanner LED power indicator Includes PSF1200 12 volt/100 ma power supply (needs at least 55 mA) Amp and PSU use 'F' plugs. Please choose plugs to match your cable. UXFR2-20 (4 OUTPUT) MASTHEAD inc. PSU £29.95 Qty We can supply all "Triax Wolsey" products. If you don't see what you need, please ask. These Triax products have been added at the specific request of customers.   TR88T TRIAX TFMV 22W-DAB-FM (370666) £19.95 Qty TR87YA TRIAX NEW F100 POWER SUPPLY (370105) £9.95 include C21547 FM+DAB+UHF decombiner £9.95 include Triax Wolsey WFAV425 masthead amplifier 1 UHF input 4 UHF outputs Adjustable gain 12 - 25 dB Noise figure <2 dB Max output 4 x 85 dBuV Amp and PSU use 'F' plugs. Please choose plugs to match your cable. WFAV25 Masthead 4 Way 12-25 dB Wolsey with PSU £19.95 Qty 12 volt 100 ma single-output mains-powered PSU for above amplifier. Replacement 12v/100 ma PSU £10.95 Qty We can supply all "Optima" products. If you don't see what you need, please ask. "OPTIMA" 4 way masthead/loft amplifier with power supply. Similar to UXF4 (above) but with ADJUSTABLE GAIN up to 20 dB per output. Ideal if you are uncertain how much amplification you need. Moderately low internal noise (typically only 2.5 dB). Requires 12v volt @ 65mA (suitable power supply included). C44157 Masthead 4 Way 8-20 dB MA20-4 Optima with PSU £16.95 Qty We can supply all "Vision" products. If you don't see what you need, please ask. "VISION" 4 way masthead/loft amplifier with power supply.   Plastic tool supplied for adjusting gain and tightening F connectors. Please note that gain adjuster is very delicate and F connectors are very tight (use grease). UHF 470 - 860 MHz. Filters remove TETRA and other interference. Inter stage Gain adjustment of 12-20 dB. Noise figure of 1.4 dB. Maximum output 70 dBV. Gain flatness of 0.7 dB. Gold plated F-Connectors & internal screens improve shielding. Similar to Proception amplifiers. Right-click to download PDF data sheet Similar to MA20-4 (above) but with ADJUSTABLE GAIN up to 20 dB per output. Ideal if you are uncertain how much amplification you need. Very low internal noise (typically only 1.4 dB). Requires 5v to 12v. 12v volt power supply included. The power supply connects to the down-feed from any of the four outputs. The power supply can be installed near any convenient mains power point. Amp and PSU use 'F' plugs. Please choose plugs to match your cable. Right click HERE to download data sheet. Need more than 4 outputs? Add splitters - click HERE. Want to buy separately, see below. Vision C49121 Mastamp 4-way V20-1420K inc 12v PSU V23-2102G £24.95 Qty No stock before June 16th Vision C12469 Mast amp 1-way V20-1127 inc. PSU V23-2102G £17.95 Qty The following amp filters 4G and Tetra by covering channels 21 - 57 only. Vision Cxxx Mastamp 4-way V20-42056 inc 12v PSU V23-2102/V23-2110 £24.95 Qty Vision Masthead Spares     The 5 volt V23-560 PSU is obsolete and has been replaced by the 12 volt V23-2102G version, which is a direct replacement for all Vision amplifiers.   Can I order these separately? Yes, by popular request. Apparently some receivers are able to supply 5 volts via the aerial feed and our amplifiers work with this, so you don't need to order a power supply. The 4 way (& 2 way) amplifiers both take 45 mA @ 5 volts DC. They can also run off a 12 volt supply. Amp and PSU use 'F' plugs. Please choose plugs to match your cable. C12537 V20-1420K Masthead 4 Way 20 dB Vision £16.95 Qty C12469 V20-1127 Masthead 1 Way 27 dB Vision £13.95 Qty C46367 V23-100 PSU Masthead 12V Vision £9.95 The 12v PSU supplies 100 ma max. Qty (Other masthead and loft amplifiers available. Please email Technical with your requirements). Vision C20884 UHF-VHF-FM 2-way V51-202 Amp is now obsolete. ANTIFERENCE A281LR PRO 8 way amplifier Radio + TV inputs 9 outputs Distribution amplifier with 2 separate inputs to distribute FM-DAB, UHF frequencies to 8 outputs + 1 high gain output. 16 dB variable attenuation controls on VHF/UHF inputs. Fully screened. Female 'F' connectors. Rejects all other frequencies outside of the UHF band. Ideal for reducing impact of interfering signals caused by TETRA, PMR and GSM mobile-phone transmissions. 8 dB gain. Maximum input level of 82 dBuV. Maximum output 90 dBuV on split outputs, 98 dBuV on the Full port. Full port enables system to be expanded by adding a series of taps. Automatic line power facility 12V 50 ma. Short circuit protection. Internal mains power supply fitted with 13A mains plug. You should use a decombiner or Diplex wall plates to separate VHF and UHF signals. Uses 'F' plugs. Antiference A281LR Pro 8-way amp £27.95 Qty Cable for Digital satellite and TV To ensure the best possible reception you would be wise to use double-screened coaxial cable. No point in buying the best aerial then using poor quality cable! Read more about this on page 8 WF100 cable is what Sky use for digital satellite installation. Full reels and Short lengths (up to 30 metres) can be supplied. Twin coaxial cable available. Clips available. UHF Bandpass Filters Before you buy a filter, please read our Technical Information. C43409 Optima (GROUP C/D) 48 to 68 pass filter , C43392 Optima (GROUP B) 35 to 53 pass filter , C43375 Optima (GROUP A) 21 to 34 pass filter Your Freeview TV broadcasts are often transmitted within a narrow group of UHF channel frequencies called a "Group". You can reduce or eliminate some types of interference by adding a "passband filter". It will help to minimise interference from other transmitters and from emergency services and mobile phone masts. This may be more important if you are using a wideband or log-periodic aerial. Filtering out unwanted signals will reduce the load on a masthead amplifier and will free up some UHF channels so that you can use them to pipe an RF signal from a satellite TV receiver, DVD and/or camera to other TV sets. Normally, the filter will be fitted close to the aerial, before a masthead amplifier. However, if you have poor quality coaxial cable, which is picking up strong local interference, you may need to fit the filter (or an additional filter) at the bottom end of the cable. You will also need 'F' plugs or leads with 'F' plugs fitted. C43375 Optima (GROUP A) 21 to 34 pass filter £7.95 C43392 Optima (GROUP B) 35 to 53 pass filter £7.95 C43409 Optima (GROUP C/D) 48 to 68 pass filter £7.95 Qty Read a filter success story HERE. 4G and Tetra Filter The UK government is selling off the UHF TV channels 61 to 68 for use with 4G mobile phones. These channels are expected to come into use in early 2013. If your home is near to a mobile phone mast carrying 4G signals, there's a possibility that your Freeview channels could be affected. Obviously you won't know until it happens and, at that point, you could fit a filter. If, however, you are installing a new aerial and/or cable now, it makes sense to fit a filter at the same time. This is especially important for aerial installations having a masthead amplifier because the filter should be fitted between the aerial connection and the amplifier. An easy job to do while the aerial is being installed but not so easy once the man with the ladders has gone! AE5100-4G FILTER with F connectors £9.95 Qty Normally, the filter will be fitted close to the aerial, before a masthead amplifier. However, if you have poor quality coaxial cable, which is picking up strong local interference, you may need to fit the filter (or an additional filter) at the bottom end of the cable. You will also need 'F' plugs or leads with 'F' plugs fitted. NOTE: If you fit a Group A or B Bandpass filter (above) there is usually no need to fit a 4G filter as well. UHF Passband Filters Please choose from dropdown list, below. Order code = for channels FRI70 FRINGE (GROUP A) 21 to 34 pass filter (Resistor not required) FRI71 FRINGE (GROUP B) 35 to 53 pass filter (Resistor not required) FRI72 FRINGE (GROUP C/D) 48 to 68 pass filter (Resistor not required) Filters: more info Please note that Fringe pass filters are unscreened. Connections should be protected with silicone grease if mounted outdoors. Download and read "Piping TV Around the House" if you are not sure. FRI70 FRINGE (GROUP A) 21 to 34 pass filter £9.95 FRI71 FRINGE (GROUP B) 35 to 53 pass filter £9.95 FRI72 FRINGE (GROUP C/D) 48 to 68 pass filter £9.95 Qty TELEVES 4162 Adjustable Double-Notch Filter A double notch filter, which can be tuned to reject one or two unwanted UHF channels. Not usable for less than three channel spacing because adjacent channels will also be attenuated. Rejection Level 15-20 dB UHF insertion loss < 1 dB FM insertion loss < 10 dB Return loss > 10 dB DC bypass: yes Frequency stability < 100 kHz/°C V25-100 A88945 diplexer UHF/VHF with F connectors £21.95 Qty V25-100 UHF + VHF/FM diplexer For combining/decombining TV aerial with Radio aerial signal to send down one coaxial cable. (At the other end you will need a decombiner plate or another V25-100 to split the signals. See page 15 for our GLO28 wall plate). The diplexer has "F" connectors and is supplied in a weatherproof plastic housing for mounting directly on a pole. However, it may be mounted indoors. It requires no power. It has no DC pass capability. (40-260 MHz VHF and 460-862 MHz UHF split.) Not SkyLink compatible. V25-100 A88945 diplexer UHF/VHF with F connectors £9.95 Qty V24-210 UHF + VHF/FM diplexer For combining/decombining TV aerial with Radio aerial signal to send down one coaxial cable. (At the other end you will need a decombiner plate or another V24-210 to split the signals. See page 15 for our GLO28 wall plate). The diplexer has "F" connectors and is supplied in a weatherproof plastic housing for mounting directly on a pole. However, it may be mounted indoors. It requires no power. It has UHF 12v 100 ma DC pass capability. UHF insertion loss < 0.6 dB. VHF insertion loss < 0.4 dB. (4-240 MHz VHF and 470-862 MHz UHF split.) Not SkyLink compatible. V24-210 C21530 diplexer UHF/VHF with F connectors £10.95 Qty V25-101 UHF only Bandpass filter To reject TETRA and GSM interference (with F connectors). DC blocked (does not pass power to a masthead amplifier). C21615 Tetra UHF bandpass filter V25-101 with F connectors £9.95 Qty Send this page address - CLICK HERE - to a friend ! UHF aerial diplexers A diplexer can be used to connect two differently grouped aerials to a single cable without mutual interference. It can also be used as a bandbass filter if only one of the two inputs is connected. (The unused input should have a 75 Ohm 'F' terminator fitted.)  Connections should be protected with silicone grease if mounted outdoors. C37119 Diplexer 21-35+ 37-69 (A + E) £12.45 C36881 Diplexer 21-37+39-69 (A-37 + E) £10.95 C38190 Diplexer 21-50+52-69 (K + CD) £12.45 Qty A09351 "F" terminator £0.60   Qty     Obsolete Diplexers (for reference only - they are no longer manufactured) FRI64 FRINGE (A+37 to E) 21-37 + 40-68 aerial/aerial combiner Diplexer FRI67 FRINGE (Ato34 + E) 21-34 + 37-68 aerial/aerial combiner Diplexer 56696-TMC3537 = 21-35 + 37-69 aerial/aerial combiner Diplexer F333-530 matching resistor (required with aerial/aerial combiner Diplexer if only one aerial connected). £0.10p DIP4047 Televes 21-37 + 40-69 aerial/aerial combiner Diplexer DIP4045 Televes 21-48 + 50-69 aerial/aerial combiner Diplexer DIP4048 Televes 21-34 & 37-69 aerial/aerial combiner Diplexer 34103-TMC3335 = 21-33 + 35-69 aerial/aerial combiner Diplexer 56713-TMC3739 = 21-37 + 39-69 aerial/aerial combiner Diplexer 56730-TMC4648 = 21-46 + 48-69 aerial/aerial combiner Diplexer 56747-TMC5153 = 21-51 + 53-69 aerial/aerial combiner Diplexer Note that there is some attenuation near the split point frequency: for example, if you want to receive channel 33, do NOT order 21-33 + 35-69 as 33, 34 and 35 will be significantly attenuated. An aerial/aerial Diplexer is actually a filtered UHF aerial combiner which has two inputs for TV aerials that point in different directions and pick up signals from different channels. Normally you can't combine these signals because you would get "ghosting" or "cancellation" of signals. However, the diplexer allows through two specific bands of UHF channel frequencies while filtering out the opposite bands from each aerial. It can also be used with a single aerial to filter out unwanted TV channels, leaving those UHF channel numbers free for you to use for your VCR, DVD, Satellite Receiver, Ondigital receiver RF output, Game Station, etc.