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Delay relay: Difference between revisions
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Several tube-era Tektronix oscilloscopes such as the [[549]], [[581]] and [[585]] contain a circuit that delays turn-on of the main | Several tube-era Tektronix oscilloscopes such as the [[549]], [[581]] and [[585]] contain a circuit that delays turn-on of the main supply voltages until the tubes are warmed up. | ||
A main relay that switches the anode voltages is controlled by a '''thermal delay relay''' such as the 6N045 or 6N030 which is housed in a miniature 9-pin glass tube enclosure. | A main relay that switches the anode voltages is controlled by a '''thermal delay relay''' such as the 6N045 or 6N030 which is housed in a miniature 9-pin glass tube enclosure. | ||