Gz37 tube data sheet

I have only listened to the mullard cv378 big bottle early 1950s tubes for a short while. Bold designators are close or identical, italic designators are different ratings, different pinouts or different filament voltages. The gz37 cv378 is a tall version of a 5ar4gz34 valve. Well, lets take the baddest of the lot, the cossor 53ku often labeled cv378. The two sections both have a tube cathode with insulated heater wires within. Tube cv 378 or rohre cv378 id281, fullwave vacuum rectifier, octal int. Please see the substitutes at the top of the page for more details. Dont know if the audio will work out but i can hear the differences. My hunch is that the tube is stressed, even if it does not arc over with a substantial filter cap.

The gz34 is an example of a typical high current rectifier for small equipment use. Rectifier tubes are the diode component within a tube amplifier that converts ac voltage from the power transformer into a dc voltage to amplify sound. Datasheet of triodes, diodes, penthodes,tetrodes, vacuum tubes. This exhibit has dual labeling as the cossor type 53ku and as the gz37 which is a mullard type. Cossor cv378 gz37 vacuum tube rectifier tube nos product vintage em. The nos mullard gz37 cv378 tube is a indirectly heated fullwave vacuum rectifier tube. Gz37 cv378 53ku u54 mullard fullwave rectifier although not an exact dropin replacement for a 5ar4gz34, the mullard gz37 can be substituted for one in many applications. Be sure to check with an amp tech before swapping different tubes. Welcome to tubedepot javascript must be enabled to.

Indirectly heated fullwave rectifier with a 5 volt heater. The gz37 is an indirectly heated full wave rectifier with a considerable rating. F and the valve needs a minimum effective series resistance of 75 ohms to. Tube depot carries a selection of 6cg7 6fq7 pre amp vacuum tubes. Substitutes are given as a guide only please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application. All tubes loose additional energy in the plate resistance rp, which is a. Tube gz 37 or rohre gz37 id22163, fullwave vacuum rectifier, octal int. It is indirectly heated but the cathode is tied to one side of the heater. There are reports about the gz37 sounding mediocre when used as a substitute for the gz34. Although it is not a direct sub to the gz34 5ar4 tube or 5u4g tube, it can be used in many of these circuits. Audiophiles have known for years of the gz37 cv378 rectifier tube and its wonderful sound quality. Though this 75 watt or class b, is really easy to find in the 845 data sheet, it is amazing how. The data sheet ive seen was published by chelmer valve. Before buying any 5ar4, 5u4, gz33, or gz37, here is a hot.