GZ34 DATASHEET PDF

The GZ34 isn’t a very talked about tube, but it is one of the most common rectifier tubes found in audio, especially in guitar amps. Rectifier tubes were some of. Page 1. Page 2. Page 3. Page 4. Page 5. GZ34 page sheet date. 1. 1. 2. 2. 3. 3. 4. 4. 5. FP. GZ Netzröhre für GW-Heizung indirekt geheizt. Parallelspeisung. DC-AC- Heating indirectly heated connected in parallel. TELEFUNKEN. Zweiweg-.

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The popular 1N is rated for V. As a rough approximation, at full load the DC output voltage will normally be between 1 and 1. Collection of Reinhard Riek D. The limit is higher dayasheet choke-input circuits, but guitar amps don’t use those, so you don’t have to worry about it.

Don’t forget about adding fuses! The GZ34 data sheet quotes a maximum capacitance of 60uF, although you can, in theory, exceed this if you increase the limiting resistance proportionately. Most valve rectifiers also need their own, dedicated heater supply. datasheeh

Collection of Philip Coller F. It may be OK for that amplifier but not for all! Vaccum rectifiers must not be ‘hot switched’, i. This also means the rectifier valve needs only one heater supply. Therefore, we can’t use the 1N if the advertised transformer voltage is greater than Vrms.

This should be no problem with modern silicon diodes. These resistors need to have a power rating that comfortably exceeds: The attached pdf gives a brief overview, but other factors such as datazheet resistance and capacitor loading must also be considered. You will find thousands of tubes or valves with interesting links. Collection of Peter Steffen CH. Two-Phase Rectifier The two-phase rectifier is used with a transformer that has a centre tap. For example, if you buy a transformer rated for “Vac datawheet then you can expect it to produce anywhere from V to Vac with light loading.

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What if the transformer voltage is higher than this? Collection of Alberto Ammendola I. Required Diode Ratings The diodes in a two-phase rectifier need to have an average forward current rating that comfortably exceeds the maximum DC load current in your circuit. However, we must ensure that the voltage is shared at least roughly equally. Collection datashfet Wolfgang Bauer A. As a rough rule of datawheet, at full load a valve rectifier will produce a DC voltage that is between 1 and 1.

These two limits are interelated and serve to keep the peak ripple current below a certain unstated level. A 1N is rated for V.

A classic alternative is to use two or more diode in series, so they share the burden.

Collection of Georges Werts B. Collection of Christian Schaufelberger CH. Collection of Philip Coller F. Valve rectifiers sometimes also need current-limiting resistance to protect them see shortly from excessive ripple datashdet surge currents.

Collection of Christian Schaufelberger CH. This is partly historical and partly because a centre-tapped transformer makes it easy to generate a negative bias supply. The data sheet will usually contain various graphs and tables of recommended operating conditions, some showing how much the voltage will sag with different load currents, so it should be fairly easy to extrapolate this information into your datssheet design.

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Collection of Pedro Prieto-Castro E. In particular tye GZ34 has a lower heater current than many others of a similar HT rating. Collection of Andreas Schulz D. The GZ34 data sheet quotes Vrms although personally I wouldn’t trust a modern production bottle to handle this. Fortunately, you don’t see such high voltages in guitar amps.

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Really it is a pair of half-wave rectifiers, each feeding the same load. Diodes also have peak and surge current ratings, but you don’t have to worry about these as they are always well in excess of what you need, provided the average current rating is adequate for the job.

Again, you don’t have to worry about peak and surge current ratings, provided the average current rating is adequate for the job. Collection of Oskar Elm D.

GZ34 Datasheet PDF –

However, on a low voltage supply for DC heaters, say the diode drop represents a significant loss and should be considered. Valve Rectifiers Ordinary valve rectifiers contain two diodes which share the same cathode and heaterin one bottle. Collection of Marco Lagendijk NL. Bridge Rectifier A datashset rectifier is used to rectify AC from a transformer with a single winding i.

The Valve Wizard

However, something like a DC heater supply would probably need beefier diodes. High-value ga34 could alternatively be used, but it is a lot easier to find 1kV-rated ceramic capacitors than 1kV-rated bz34. Antique radios, Old Time Radios. Two full-wave rectifiers orientated in opposte directions creates a bipolar supply positive and negative DC.

Under light loading the DC output voltage will again be equal to: Collection of Massimo Pedrina I. The data sheet will present table or graphs showing the minimum limiting resistance needed for a given application.