[Boatanchors] transistor help needed

[Bob Hardie- W5UQ]

Wow... CK722....  I have one of those in my collection.
Went to find it and found it is silver like a crystal case.

This one has one lead farther from the other two.   
I didn't test mine, but the fartherest one should be the collector.
the one on the other end was the emitter and the center one was the base. 
Or   E,B, space C
I also have some of the old sockets for them and a few other old 
germanium transistors. 
Bob

Sandy wrote:
> Jesus!  I built a ouple of the old Kraft receivers a jillion years ago!
>
> I couldn't be sure but I thought the red line identified the collector 
> leads.  I see the assembly instructions confirm this.
>
> I remember the transistors were in a cylyndrical package with a round domed 
> top.  Seems like they were Philco transistors.
>
> Didn't the old "blue metal cased" Raytheon CK722's also use a red dot to 
> indicate the collector as well?  The CK-722's case went from black plastic 
> eventually to a blue painted aluminium case.  There wasn't any "standard" 
> TO-5 type package in those days!
>
> 73,
>
> Sandy W5TVW
> ----- Original Message ----- 
> From: "Pete Lancashire" <pete at petelancashire.com>
> To: "WØQFC" <erastber at tampabay.rr.com>
> Cc: <boatanchors at mailman.qth.net>; <flboatanchors at yahoogroups.com>; 
> "BOATANCHORS at LISTSERV.TEMPE.GOV" <boatanchors at lists.tempe.gov>; 
> <carshamradio at googlegroups.com>
> Sent: Friday, September 04, 2009 4:05 PM
> Subject: Re: [Boatanchors] transistor help needed
>
>
> a real quick google search came up with this
>
> http://www.e-radiocontrol.com.ar/downloads/vintage/rxtxpulso/Single%20Channel%20Rx%2026-28%20MC.pdf
>
> check near bottom of pg 5
>
> -pete
>
>   
>> My transistor manual shows the base diagram of a 2N224 as having a small
>> tab near the emitter lead; clockwise the base is next and then the
>> collector.
>>
>> The (really) OLD 2N224's I have do not have a tab, only a small red line
>> on the side and I think this red line is marking the collector, but that
>> is where I am not sure.
>>
>> Was (is) there a conventional marking system for these old transistors?
>>
>> Any help/ideas will be greatly appreciated!
>>
>> TIA es 73
>> Gene, WØQFC
>> Spring Hill FL
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