Antique radios, Old Time Radios
535-A
|
|
|
|
|
| Tube type: |
Double Diode-Triode Text |
|
| Identical to |
535-A
|
| Similar
Tubes |
Normally replaceable-slightly different:
535-B
Other class quality (otherwise equal):
1659
; 2A6
|
| Base |
6-Pin-Base U6A, old, USA
Top contact with a cap.
|
| Was used by |
Technology / Measurement |
| Filament |
Vf 2.5 Volts / If 0.8 Ampere / Indirect / Specified voltage AC/DC |
| Description |
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.)
|
| Information source |
- - Manufacturers Literature Boonton Manual
|
|
535-A: Telefunken Werkstattbuch
Wolfgang Bauer
|
Just Qvigstad
|
|
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
Collection of
|
|
|
|
You reach this tube or valve page from a search
after clicking the "tubes" tab or by clicking a tube
on a radio model page. You will find thousands
of tubes or valves with interesting links. You
even can look up radio models with a certain tube
line up.
[rmxtube-en]
| Data Compliance |
More Information |
|
|
|
