Solid State Shortwave Receivers For Beginners - The Listeners Guide
Solid State Shortwave Receivers For Beginners - The Listeners Guide
Solid State Shortwave Receivers For Beginners - The Listeners Guide
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Components List for Fig.26<br />
Resistors (¼ watt 5%).<br />
R1 150 ohms<br />
R2 1k<br />
R3 2.2k<br />
R4 1k<br />
VR1 50k log. carbon.<br />
Capacitors.<br />
C1 100mfd. 10v.w.<br />
C2 100mfd. 10v.w.<br />
C3 10nf ceramic.<br />
C4 100mfd. 10v.w.<br />
C5 47nf plastic foil.<br />
C6 15nf plastic foil.<br />
C7 47nf plastic foil.<br />
C8 100mfd. 10v.w.<br />
VC1 50pf air spaced (type C804).<br />
VC2 365pf air spaced (type 0).<br />
Semiconductors.<br />
Tr1 2N3819.<br />
I.C. LM380N<br />
Inductor.<br />
T1 Denco Green D.P. coils Ranges 3, 4, and 5.<br />
Miscellaneous.<br />
S1 S.P.S.T. toggle switch.<br />
Case, battery, telescopic aerial, etc.<br />
A much more simple method of elliminating hand capacity effects<br />
is to earth the negative supply rail. This need not be a complicated<br />
earth, and a small metal spike pushed into the earth will do. Connecting<br />
the negative supply rail to any large metalic object has a similar effect.<br />
Even a length of wine connected to negative supply and left dangling<br />
below the receiver will probably be found to adequately suppress hand<br />
capacity effects. Although these last methods are very simple, they are<br />
not as convenient as the first method when it comes to actually using<br />
the set, and the use of spindle extensions is the method preferred by<br />
the author.<br />
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