[Collins] RE: Transistor Question

[E C Moxon]

Hello all...
There has already been great response to Merle's question, here's just a
little more, and a question of my own. 

Some years ago I convinced myself that the transistor marked AT5058 was the
same as the TI A5T5058 in my '73 transistor and diode book. It is a plastic
repackaging of the registered 2N5058 - metal can. The '5058 has the highest
Vce of any device in the high-voltage selection guide. Anyway, the data for
the 2N5058 (except for power) seemed like it fit the application. I would
think that today the MPSA42 would be a fine substitute, as shown in Pete's
schematics.
 
I had a dead tubester that was for the 'S3 rf amp (ST108). The problem
turned out to be the fet, not the '5058, but that's why I was looking into
this. I tried an NTE454 as a replacement for the 3N205, and it worked --
sort of. With a multiband vertical, I was getting out-of-band overload that
I didn't get with the 6DC6, so I kinda gave up, with the idea of looking
into it later on. Yeah, right.

So this might be a good time to ask the group - is anybody using a tubester
in the front end of a 'S3, without overload problems? I could use some
encouragement.
 
73,
Ed, K1GGI

> I have a transistor I can not identify, wonder if anyone on the 
> list has
>the information on this guy..??
>
> It is out of a " tubester "  that some people used in their 
> Collins
>radios back a while ago.
>
> The numbers on it are: AT 5058 and on the other end of it is 
> another
>number T 1402C or it might be TI  402C  anyway it is not in any of 
>my reference books ! Any help would be appreciated.
>
> 73 and thanks
> Merle W1GZS