[Boatanchors] [FLBOATANCHORS] Re: [CARSHamRadio] Re: transistor help needed

[Bob Hardie- W5UQ]

 you are absolutely right and I should have mentioned that too... thank 
you for doing so.
:-)
Bob

J. Forster wrote:
> A couple of points:
>
> The polarity of a VOM in Ohms mode are NOT always the same aws Volts or
> Amps. The easy way to check, is to use the Ohms range on a fair sized
> capacitor, then measure the voltage. If negative the Ohms is reversed
> polarity.
>
> A Ge transistor, especially a 40 year old one, could well have very high
> leakage by now (and be barely a transistor any more).
>
> Best,
> -John
>
> ================
>
>
>
>   
>> If looking at the BOTTOM of the transistor.....
>> ... it will be emitter, base  and then collector.... clockwise
>> or 9am is the emitter, noon is the base and 3pm is the collector...
>>
>> using a VOM with diode tester:
>> the 2n224 is a PNP,
>> put the negative lead on the noon lead
>> then the red on the 9am lead... if good and we are right on the layout
>> of the leads, then it should read around 200 or 300 ohms.
>>
>> AND then move the red lead to the 3pm position keeping the black on the
>> noon lead ... it should read 200 or 300 ohms, not exactly the same as
>> the other measured, but kinda close... like it could be as much as 30 or
>> 40 ohms difference...
>>
>> Again, this is IF the transistor is working...
>>
>> There should be NO conductance or measurement reversing the leads...
>> also no measurement between the 9am and 3pm leads, with leads either
>> way, red on 9am and black on 3pm and visa versa.
>>
>> this should work Gene...  :-)
>>
>> Bob
>>
>>
>>     
>>> <http://www.eset.com>
>>>       
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>>     
>
>
>
> __________ NOD32 4398 (20090905) Information __________
>
> This message was checked by NOD32 antivirus system.
> http://www.eset.com
>
>
>
>