Страница 1: ...stroying the MesFET when the pre amplifier is in TX mode The BF998R is biased for 10mA with 4 volts on Gate 2 The output impedance is matched to 50ohms using a high frequency F29 material ferrite balu...
Страница 2: ...f 0 3mm ECW through the core A to B then make a 15mm loop and twist the loop together for a tap and then wind a further 1 5 turns B to C One turn is when the wire passes through one hole of the 2 hole...
Страница 3: ...c 1nF 680K 2N7000 47k 150R 10uF L1 L2 9 Turns 0 9mm TCW on a 5mm dia drill bit spaced 15mm long L1 16 Turns 0 3mm ECW on a T37 0 Core 270 degrees 2x 1N5711 1nF 22k ANTENNA TO RADIO L3 3 5 Turns taped...
Страница 4: ...either be powered via a DC power cable connected directly to the board or through the coaxial cable The easiest solution is to power the pre amplifier using a DC cable connected directly to the board...
Страница 5: ...T50 6 Toroid Yellow Colour For L4 1 x BN29 1050 2 Hole Neosid F29 Balun Core L3 2 x Relays JW1FSN DC12V Panasonic OPTIONAL 1 x ENCL19 GME Kingray Masthead amplifier Box 2 x BNS01 BNC Bulkhead mount so...
Страница 6: ......
