Radios antiguas y Radios de Colección
535-A
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| Tipo: |
Double Diode-Triode Texto |
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| Idéntica a |
535-A
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| Válvulas similares |
Substituya normalmente -diferencia peq.:
535-B
Other class quality (otherwise equal):
1659
; 2A6
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| Base |
6-Pin-Base U6A, old, USA
Top contact with a cap.
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| Usada en |
Technology / Measurement |
| Filamento |
Vf 2.5 Volt / If 0.8 Ampere / Indirect / Specified voltage AC/DC |
| Descripción |
The voltmeter of the Boonton Radio Corp. Q-Meter type 260A uses a unique calibrated tube, this 535-A, especially made, or selected from a 1659, for Boonton by RCA. It bears the 1659 designation on the glass with a specially marked base. (Low grid capacitance and low grid current are prime requirements as it operates as a leaky-grid detector with a 100M ohm grid-cathode resistance.)
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| Literatura |
- - Manufacturers Literature Boonton Manual
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535-A: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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