| To: | "Roger (K8RI)" <k8ri@rogerhalstead.com>, amps@contesting.com |
|---|---|
| Subject: | Re: [Amps] design approach for QRO solid state |
| From: | peter chadwick <g8on@fsmail.net> |
| Reply-to: | g8on@fsmail.net |
| Date: | Thu, 12 Sep 2013 17:21:20 +0200 |
| List-post: | <amps@contesting.com">mailto:amps@contesting.com> |
Adding to Roger's comment on diffusion and temperature, this is why old tunnel diodes are often u/s. Tunnel diodes use very high doping levels, and some diffusion occurs over time even at room temperature. This is why a lot of 1970s 'scopes aren't triggering well - if at all. 73 Peter G3RZP _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps |
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