This TV/UHF + TV/UHF diplexers may be mounted on the aerial pole (strap supplied) or on the wall, but it is equally suitable for indoor use.
Hardwired and screened.
The through loss is around 1dB, apart from on the “shoulders” of the splitting frequency (see graph below).
Cross channel rejection is about 20dB.
The units can also be used as high efficiency filters, using a 75 Ohm resistor (not supplied) to terminate the unused leg.
Channels 21* to 37 combined with 39 to 68 (i.e. split at CH38)
* The lower leg actually accepts signals from 47 MHz upwards (i.e. it passes FM/DAB).
See article on Diplexers.
P&P is cheaper for this item if you phone the order through !
1 – Input (or output) of lower frequencies.
2 – Output (or input) of combined signal.
3 – Input (or output) of higher frequencies.
Power pass switchable (on or off) on either leg.
Example of using a diplexer to increase gain from two aerials :
Similar units mounted outside :