[Heath] My IP-27

[MICHAEL TALLENT]

I would put the good 2553 into Q2 and use a silicon PNP for Q3 as it is just 
an emitter follower driving the pass transistors.  I put a 2N2869/301 in 
place of the DTG-600 and it seems to be working OK.  I don't own an Octopus, 
what do you feed them?

Mike  W6MXV

----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: <Heath at puck.nether.net>
Sent: Sunday, June 10, 2012 8:51 PM
Subject: [Heath] My IP-27


> From what I have been able to determine, at least one of the 2N2553s, and 
> one of the
> 2N2869s, if not both, are bad, and the DTG-600 is weak if not altogther 
> bad.
>
> I found an outfit on the web, Talon Electronics, which had the 2N2553s for 
> sale for a
> somewhat reasonable price.
>
> I found 2 ea 2N301s for a very good price on eBay, and a DTG-600 for what 
> I thought was
> pretty high ($28.00) on eBay.
>
> All these are NOS or NIB.
>
> I used The Octopus to check them with since I don't (yet) have a working 
> transistor tester or
> curve tracer.
>
> Now we will see.
>
> Ken W7EKB
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