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In Reply to: RE: Voltage Doublers posted by Tom Bavis on July 23, 2014 at 05:57:04
vintage amps like the Marantz 8 and 9, Heathkit W-6. Don't think cost was a major consideration with them
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The Marantz 8, in all of its file cabinet sheet metal glory was definitely cost constrained. The high PIV diodes back then were not like they are now. Getting a diode to stand up reliably to high voltage was hyper-expensive back then. The Model 8B, was first offered for sale in 1961 or '62, for $250. $250 in 1962 has the same buying power as $1,973.04 in 2014.
With any manufacturer cost is always a consideration. Back in the late 50's and early 60's solid state rectifiers and large capacity electrolytics were expensive. Their cost was second only to the transformers. Voltage doubler power supplies were the most expensive power supply to make back then. They were used because they yeiled superior results. Today they have gotten still better with modern components.
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