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Consumer electronics, AV, camera
Audio equipment
Amp
Vacuum tube amplifier
Vacuum tube
2A3 2枚プレート CHINA 中国製 2本セット 中古 動作確認済
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Seller rating
280
Seller items
syu********
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Start time
31 Oct 10:56 (Tokyo)
Ends in
03 Nov 11:56 (Tokyo)
Number of bids
0
Available
1
VAT
0%
Item condition
Minor scratches or stains
Shipping within Japan
No free shipping
Auction ID
c1246670105
Automatic extension
Yes
Sales area
埼玉県
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Description
中国製 2A3 2本セットです。
動作確認しました。
プレート電圧200V時、 カソード抵抗1kΩにて
1本目 Ip=32.3mA Vg=-32.3V
2本目 Ip=33.3mA, Vg=-33.3V
でした。
自己バイアスのアンプでは1〜2mA程度の差しか発生しないため、よく揃っていると思います。
グリッドは金メッキされています。
グリッド電流の低減効果を狙ったものですが、
動作時のグリッド電流は2本共0.05uA程度で十分小さく、問題ありません。
なにぶん古いものですので、NC,NRにてお願いいたします。
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