[Boatanchors] transistor help needed

[Sandy]

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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