To: | [email protected] |
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Subject: | LF: Re: Vacuum tubes on Motherboards... |
From: | "John Rabson" <[email protected]> |
Date: | Tue, 22 Oct 2002 10:28:47 +0100 |
References: | <[email protected]> |
Reply-to: | [email protected] |
Sender: | <[email protected]> |
A few years ago, I was restoring an ancient Hallicrafters receiver and noticed the crisp quality of the audio compared with that of a 1960s transistorised communications receiver. I spoke to one of the experts at BT Labs, who suggested that the output transformer might have something to do with it. Also, the characteristics of a bipolar transistor audio output stage are _not_ identical to those of a pentode or beam tetrode. 73, John Rabson G3PAI |
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