| |
G8MNY > TECH 05.01.03 13:47l 34 Lines 1250 Bytes #999 (0) @ WW
BID : 36729_GB7CIP
Read: GUEST OE7FMI
Subj: MW Radio 1st stage
Path: DB0MRW<DB0PV<OE2XOM<OE5XBL<OE3XSR<OK0PCC<OK0PAD<OK0PPL<RZ6HXA<LX0PAC<
LX0HST<HA3PG<IK1ZNW<GB7CRV<GB7CIP
Sent: 030105/0929Z @:GB7CIP.#32.GBR.EU #:36729 [Caterham] $:36729_GB7CIP
From: G8MNY@GB7CIP.#32.GBR.EU
To : TECH@WW
Example of multiple use of a single transistor in a MW radio that does:-
1/ RF PREAMP WITH Q MULTIPLIER
2/ RF LOCAL OSC
3/ RF MIXER
------------ Power
| \ !! ----
--- / !! \ 455KHz
--- \ !! / IF O/P
| / !! \____
----- IF TRANSFORMER
|__________
\ !
/ ! OSC COIL
! \ !
! ---------------------------------/ !
! \ Q Multiplying !
F ! / feedback coil !
E ! \-------------------- !
R ! bias | !
I ! R | / !
T ! -------||---------| !
E ! \ | | \ e !
! / | |__________ !
R ! \ === | \ !
O ! / | Tune Tune === / ! OSC COIL
D ! \ | RF OSC | \ !
! ---------------------------------/ !
! 0.53-1.6MHz 0.9-2.1MHz
73 De John, G8MNY @ GB7CIP
Read previous mail | Read next mail
| |
