[Boatanchors] Question for Tektronix Folks

[Francesco Ledda]

You can find 2N4275s on Ebay for $3.95!@\

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of MICHAEL TALLENT
Sent: Sunday, July 01, 2012 9:46 PM
To: David Stinson; Boatanchors at mailman.qth.net; boatanchors at theporch.com
Subject: Re: [Boatanchors] Question for Tektronix Folks

The 2N2222 will probably work with reduced bandwidth, so you should replace
with the 2N4275 when available.  I probably have some of them if you have
trouble finding them.

Mike T  W6MXV

----- Original Message -----
From: "David Stinson" <arc5 at ix.netcom.com>
To: <Boatanchors at mailman.qth.net>; <boatanchors at theporch.com>
Sent: Sunday, July 01, 2012 5:28 PM
Subject: [Boatanchors] Question for Tektronix Folks


> My bench scope is a Tek. 454 (have two of them).
> The vertical amp railed and I found one of the 2N4275
> transistors open-collector.
> The specs for a 2n2222 show it more robust that the
> 4275, but it tops at 250 mHz vs. the 4275's 400 mHz,
> plus the 2222 has double the collector capacitance,
> 8 pFd vs 4 pFd.  Still pretty small.
> So will a 2222 work for now or am I going to mung it up
> while I wait for the right transistor?
>
> TNX ES 73 DE Dave AB5S


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