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576: Difference between revisions
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The demise of the original 575 came in 1971 when the 575's companion 175 pulsed high-current unit was no longer sold, replaced by the 576 with its new 176 pulsed high-current adaptor. The 575 itself disappeared from the catalog about a year later. | The demise of the original 575 came in 1971 when the 575's companion 175 pulsed high-current unit was no longer sold, replaced by the 576 with its new 176 pulsed high-current adaptor. The 575 itself disappeared from the catalog about a year later. | ||
When production ended with its appearance in the 1990 catalog, the sales price of the 576 had escalated to a stunning $18,040, replaced by the 370 and 371 models selling for just a little bit more. The 576 now sells on the eBay on-line auction site for anywhere from about $300 to over $2000, usually offered without the safety shield or any adaptors and often without the standard test fixture which sellers seem to enjoy offering separately. Many are sold with only the 176 pulsed high-current adaptor installed. The small transistor | When production ended with its appearance in the 1990 catalog, the sales price of the 576 had escalated to a stunning $18,040, replaced by the 370 and 371 models selling for just a little bit more. The 576 now sells on the eBay on-line auction site for anywhere from about $300 to over $2000, usually offered without the safety shield or any adaptors and often without the standard test fixture which sellers seem to enjoy offering separately. Many are sold with only the 176 pulsed high-current adaptor installed. The small transistor adaptors are selling for nearly their original catalog price. On average, the 576 is being sold on the used market for about 1/12 its last catalog price …. or at about half the price when it first appeared in 1969. Overall, the instrument has held its value and popularity very well. | ||
Many vacuum-tube enthusiasts are using the 576 along with a heater supply to test vacuum tubes, which it can do very well. By designing a switched heater supply and socket pairs into a metal project box, this would essentially replace the “ancient” Type 570 vacuum-tube curve tracer, which was last sold somewhere around 1966. The homemade accessory would work very well for matching triode pairs. The long-antiquated 570 is in great demand among vacuum-tube enthusiasts and “audiophools” (hobbyists who trust their ears more than any test equipment measurements), which is very surprising. | Many vacuum-tube enthusiasts are using the 576 along with a heater supply to test vacuum tubes, which it can do very well. By designing a switched heater supply and socket pairs into a metal project box, this would essentially replace the “ancient” Type 570 vacuum-tube curve tracer, which was last sold somewhere around 1966. The homemade accessory would work very well for matching triode pairs. The long-antiquated 570 is in great demand among vacuum-tube enthusiasts and “audiophools” (hobbyists who trust their ears more than any test equipment measurements), which is very surprising. | ||