06-10-2021, 12:23 PM
Joe Sousa brought this ЭМ-10 rod tube to my attention:
https://www.ebay.com/itm/322895472704
https://www.radiomuseum.org/tubes/tube_eem-10.html
About 17 mA @ 0.7V. Notice the shield at the base? It's for electrometer or other very high impedance applications. Though the 1j42a and 1j24b are good too.
I found this Electrometer schematic years ago on a NASA web site.
https://www.ebay.com/itm/322895472704
https://www.radiomuseum.org/tubes/tube_eem-10.html
About 17 mA @ 0.7V. Notice the shield at the base? It's for electrometer or other very high impedance applications. Though the 1j42a and 1j24b are good too.
I found this Electrometer schematic years ago on a NASA web site.
