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1. LF: Re: Re: Vacuum tubes on Motherboards... (score: 1): Author: "John Andrews" <[email protected]>; Date: Tue, 22 Oct 2002 13:45:44 -0400; I'd agree with Alberto's comments on IF filtering. Another possible issue from the '60s would be crossover distortion in solid-state AF power amplifier stages. Sounds nasty, especially on CW. John An; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-10/msg00155.html (8,842 bytes)
2. LF: Re: Re: Vacuum tubes on Motherboards... (score: 1): Author: "John Rabson" <[email protected]>; Date: Tue, 22 Oct 2002 18:13:10 +0100; I believe the Hallicrafters used several pairs of lightly coupled tuned circuits. The 1960s receiver, a GEC RC411, had crystal filters. There is of course another advantage to the thermionic device.; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-10/msg00156.html (10,591 bytes)

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