(The Malta 40 is a superhet QSK transceiver described for 7mhz in SPRAT NR 78)
(1) THE VFO:
========
Frequencies of 3760 to 3860 KHZ.
Replacing the variable capacitor of 50pF in series with the fixed
capacitor of 39pF by a variable capacitor of 20pF covers 100KHZ linearly.
C44:270pF in the place of 330pF
(2) THE RECEIVER:
=============
C1:47pF in place of 220pF
crystal filter:C8,C12:330pF
C9,C11:470pF
C10:560pF
R5:270R in place of 390R
L4:55 turns on T50/2
WARNING....return C32 ....WARNING
(3) THE TX:
======
L11:55 turns on T50/2
L6:10 turns + 10 turns; link 2 turns on T37/2
bifilar with center tap
L7:10 turns + 10 turns; link 2 turns on T37/2
tap taken cold side
R36:39R to the place of 47R
L9,L10:12 turns on T37/2
C69,C70,C71,C72:220pF to the place of 390pF
crystal:10240KHZ
It functions terrific well.
I would welcome any comments or suggestions.
Regards to all
BBS packet: ON6GW@ON5VL.#LG.BEL.EU
ON6GW Guy G-QRP CLUB NR 8699
ON6GW is not on Internet.
qsp from ON5UP/QRP
EMAIL users :
PIERRE TARTE (GSM : 075293198)
ANDRE TARTE (ON5UP/QRP) (G-QRP CLUB 6524)
RUE DU TIGE,37,DREHANCE
B-5500-DINANT-BELGIUM
FAX:082/222832
E-MAIL :tartep@tornado.be
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Frank, G3YCC