50 (FET) Field Effect Transistor Projects - Battery Portable

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BABANI PRESS BP 3950 (FET) Field EffectTransistor Projects+ Field effect transistors (F.E.T’s) find applicationin a wide variety of circuits. The projects describedhere include radio frequency amplifiers andconverters, test equipment and receiver aids, tuners,receivers, mixers and tone controls, as well asvarious miscellaneous devices which are useful inthe home.+ lt will be found that in general the actual F.E.T. usedis not critical and many suitable types will performsatisfactorily. The F.E.T. is a low-noise, high gaindevice with many uses, and the dual gate F.E.T. is ofparticular use for mixer and other applications.+ This book contains something of particularinterest for every class of enthusiast - shortwavelistener, radio amateur, experimenter or audiodevotee.+ A valuable addition to the library of all electronicenthusiasts.Coverdesign by the Nicholls Design UnitBABANI PRESSThe GrampiansShepherds Bush RoadLondon W6 7NFEngland
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INTRODUCTIONField effect transistor
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type of FET is thus very useful whe
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Type No.BaseMaximumRatingsOther Inf
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Thus, over this range, a change of
Page 12 and 13:
When building VHF units of this and
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FM BoosterFor long distance recepti
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y tapping the drain down L3. The su
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Range 3, 1.67-5.3MHz, or 580 to 194
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A metal cabinet about 6 x 4 x 4 in
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It the receiver has a signal streng
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Ham Band PreselectorAn amplifier or
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In view of the number of turns requ
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Layout should allow very short conn
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eak through. More care in finding a
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for each range is as shown below, w
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Any audio or general purpose FET ca
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Calibration of its scale can be by
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tion, VC1 tunes the inductor to res
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Should the field strength meter be
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here. The upper frequency limit at
Page 49 and 50: Coupling from the marker to the rec
Page 51 and 52: Coupling to the receiver can be by
Page 53 and 54: For the lower frequency range, C1 i
Page 55 and 56: A control knob is necessary on VC1,
Page 57 and 58: Two inputs are required to the FET.
Page 60: much higher level, than that from a
Page 63 and 64: nals, the box or case must be of pl
Page 66 and 67: Values for Figure 33R1 1k C1 22uF 1
Page 68 and 69: Preamplifier for PhonesFigure 35 is
Page 70 and 71: The input socket, connected to C1,
Page 72 and 73: The “Radio” socket is suitable
Page 75: Audio power from the drain develops
Page 78 and 79: Yet another top cut control is show
Page 80 and 81: MISCELLANEOUS CIRCUITSThe miscellan
Page 82: 0.001 = 8000, so R1 is 8k. (Note th
Page 85: type intended for this purpose, and
Page 89 and 90: of the circuit, and 2nd, 4th, 6th
Page 92 and 93: Components for Figure 47C1 4.7nF si
Page 94 and 95: so that it can be swept about near
Page 96 and 97: The following will prove of aid to
Page 98 and 99: given, a deflection of somewhat ove
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50 (FET) Field Effect Transistor Projects - Battery Portable

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