File:Old dusty DIY tube-mosfet preamp - SSG-3 silver-mica capacitor.jpg

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Old dusty DIY tube-mosfet preamp - SSG silver-mica capacitor

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Description
English: I was looking for an amplifier enclosure... and I found THIS. An old tube preamp that I made around 2000. All tubes (both in phono and line stages) are loaded into Gary Pimm battery-biased mosfet current sources.After more than 20 years, some batteries still hold the rated voltage, others are way down but not completely dead. None had leaked. They don't build batteries like this anymore.
The SSG-3 capacitor shown here is a rare example of silver+mica capacitor in a fairly large value of 200nF. Each capacitor contains 1.15 grams of silver, so most of these were already butchered to extract it... very few left. Is it any better than quality MKP? your guess is just as good as mine.
Русский: Искал подходящий корпус для усилителя, и нашёл ЭТО. Лампово-полупроводниковый предусилитель, который я собрал около 2000 года, запустил, даже отчасти отладил - но никогда не использовал. Обычные пассивные ламповые схемы, но в нагрузках - источники тока по схеме Гери Пимма (два МДП-транзистора и две батарейки смещения в каждом). По прошествии двадцати лет некоторые батарейки еще держат номинальное напряжение, другие подсели но не сдохди совсем, и ни одной протечки. Умели же делать... но больше не будут.
Date
Source Own work
Author Retired electrician

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current12:27, 9 April 2023Thumbnail for version as of 12:27, 9 April 20231,853 × 1,390 (691 KB)Retired electrician (talk | contribs)Uploaded own work with UploadWizard

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