b443 Philips 4 pin Valvola tube valve finale radio res174d l416d pp415 pm24
- Condition: Used
- Price: 79.9 EUR
- Status: unsold
- Item number: 267072014004
- Seller: cartago_delenda_est (1347|100.0%)
- Seller information: non commercial
- Item location: verona
- Ships to: Worldwide
- Shipping: 36,5 EUR
- on EBAY
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Description
1 valvola B443 4 pins ( + contatto laterale) Philips Miniwatt a globo, base marrone testata su prova valvole Funke W19S = 18mA (riferimento buona a 17mA) ricambio originale vintage per amplificatori e radio depoca a valvole vintage, valvola usata e testata, come da foto 1 valvola = 1 tube versione a 4 pins e contatto laterale: prima versione prodotta nel 1927 B443_4pin = L416D_4pin = W443_4pin = PP415_4pin = TU415_4pin = PM24 = B443A = RES174d = PT415 = R79 = 4GBF = RO4243 = T60_Adzam_4pin = TB43 = TL414 = 415QD_4pin = 415PP_4pin = 415PT_4pin = 410PT Valvole simili Sostituita normalmente - piccola diff.: D100_4pin ; L43Prime informazioni Sep.1927 ZoccoloEurope 4-Pin B4 + side contactFilamento Vf 4 Volt / If 0.15 Ampere / Direct / Specified voltage AC/DC First output pentode on market September 1927Equivalent types: RES174d (Telefunken), L415D (Valvo), PP415 (Tungsram)Successors: B443S, L416D, RES164 The B443 is the first produced output pentode of the world, introduced by Philips in September 1927. Its amplification and its power output was much higher as with an output triode of equal size. The B443 has established the replacement of output triodes by multiple-grid output tubes. The equivalent Telefunken type RES174d appeared in 1931. box 207
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