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It is a pulse generator using an GR-874 50-ohm output connector and has a specified rise time of 250ps. Pulse width can be programmed with a external 50 Ohm cable through two GR-874 50-ohm connectors. Max . allowed impulse width is 50nS. The internal power supply allows 50Vpk and with ext. PWR max. 300Vpk is possible!

The special feature of the device is, that the switching action is made directly be a mercury-reed contact. Frequency and life time was therefore fairly short. About 600Hz and 200 hours. So, forget to shut down over weekend and some holy-days, needet a replacement of the reed switch. Be aware during servicing, the thermal breaker is on full mains and has no protection cover!

If there are some spare reed/contacts, please let me know. ;-)

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  Front view

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  Right internal

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  Left internal

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  Rear view Connector not original

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  flying spot catched with 7904, S6, 7T11, 7M11. 2.5Vpk, Tr=240pS