The differentiate of dynatron polarity

   The use avometer judgement to dynatron polarity the article tries to explain in the light of NPN dynatron differentiate only, in the watch to PNP dynatron differentiate the pen is built receive on with NPN model contrary.
3 of dynatron cite a base, base (B) , collector (C) , and blast off extremely (E) , can use avometer to decide simply piece. The ｈ FE value of dynatron also can be measured.
The red club avometer (- ) with black club (＋ ) the random that measures dynatron two pin (1K archives) , if show low block value, among them one foot is base (B) . Later, will red club (- ) move to the 3rd foot, if still show low resistance, the base that not mobile black good place accepts is base, be informed this dynatron to be NPN model, following graphs (A) place is shown. (right now avometer expresses park R X 1K archives) . 2 residues that leave (E and C) how Where is differentiate? Detailed sees – how judge dynatron blast off extremely with collector. How to detect stand or fall: 1, judgement collector – blast off extremely between leakage of electricity, you are found collector and blast off extremely hind, if you measure these 2 to cite a base with avometer directly, no matter polarity how trade, all show tall block value. Following graphs (B) place is shown.

3 class canal launchs a good common silicon class and position of finger of avometer of market report class are immobile almost, if discover block is worth decrescent, explain this pipe performance is bad already. Judgement emissive class and collector leakage of electricity use avometer 10K file. 2, judgement collector and base and blast off extremely with base between leakage of electricity, block red club with 10K (- ) build the foot is brought to go up in base, black club is ordinal build mix in collector blast off extremely bring a foot to go up, block value should be infinity, avometer finger position is immobile almost, if discover even if a bit ambulate,watch needle ambulates, explain this dynatron performance is bad already the differentiate of dynatron base: According to the structural sketch map of dynatron, what we know the base of dynatron is knot of two PN in dynatron is extremely communal, accordingly, when the base of differentiate dynatron, what should find out two PN to written guarantee only is extremely communal, it is the base of dynatron namely. Specific means is will multi-purpose the R × 1k that ammeter attune holds back to report is blocked, put on a foot of dynatron with red watch pen first, what with black list the pen touchs dynatron is additional two feet, if two allpass, the foot that the red place that express a pen puts is the base of dynatron. If was not found, pen of red watch changes another foot of dynatron, measure twice again; If had been not found, pen of red watch is changed again, measure twice again. If had been not found, convert on a foot that black list pen puts in dynatron, with red watch the pen is measured twice look whether allpass, if do not have a success,change again. Did not measure 12 times at most so, always can find base.
The differentiate of dynatron type: Dynatron has two kinds of kinds only, namely PNP with NPN model. Should know base is P material only when differentiate the profile that return N expects can. Should use multi-purpose when 1k of ammeter R × is blocked, black list pen represents power source anode, if black list pen is received,guide when base, the base that shows dynatron is P material, dynatron is NPN namely model. If red watch pen receives base to guide,connect, explain dynatron base is N material, dynatron is PNP namely model.
　　 The differentiate of silicon canal, germanium canal
Silicon is in charge of and germanium canal has on character very big different, when using, should try to distinguish. We know, silicon canal and the PN that germanium is in charge of written guarantee to resistor it is different, namely silicon is in charge of to resistor big, what germanium is in charge of is small. Use this one character to be able to come with avometer differentiate a transistor is silicon canal or germanium canal.
Differentiate method is as follows:
Dial avometer R*100 to block or R*1K is blocked. When measuring diode, of avometer the negative pole of termination diode, lose the anode of termination diode; Measure NPN model when dynatron, the negative termination base of avometer, termination collector or blast off extremely; Measure PNP model when dynatron, of avometer termination base, lose termination collector or blast off extremely.
After been receive by afore-mentioned methods, if the directive expressing a needle of avometer is in the right end of dial or stand by full scale locally (namely block value is lesser) , so measures pipe is germanium canal; If the watch needle of avometer is in of dial in occasional slants a bit righter locally (namely block value is greater) , so measures pipe is silicon canal.
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