| To: | amps@contesting.com |
|---|---|
| Subject: | Re: [Amps] Grid resonance |
| From: | Steve Thompson <g8gsq@ic24.net> |
| Date: | Fri, 8 Apr 2005 11:36:45 +0100 |
| List-post: | <mailto:amps@contesting.com> |
Tests on a NOS 811 (dated 1944): The filament - grid circuit shows goes through 'short' at about 200MHz, and 'open' at about 500MHz. Feed through (50 ohm source and load) is -40dB or lower up to 100MHz, then climbs to -6dB at 200MHz and stays between -5 and -8dB up to 500MHz. Steve _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps |
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