Russian Transfer Standard B1-30

[zhtoor]

Hello,

any body with teardown or other information about this ref?

specs:-
The reproducible voltage is 9 ± 0.45 V.
The instability of the reproducible voltage for every 1000 h at a temperature of 20 ± 5 ° C is 0.0005%.
Additional temperature error is 0.000025% / ° C.
The time for setting the operating mode is 4 hours.
The output resistance is 15 ohms.
Power consumption - 8 V ??· A.
The overall dimensions are 151 × 86 × 79 mm.
Weight - no more than 1.2 kg.

regards.

-zia

[wraper]

Zener diode datasheet: http://www.eandc.ru/pdf/stabilitron/2s108g-r.pdf

[Mickle T.]

I have a two V1-30. They are rather old and noisy (1 ppm p-p 0.1-10 Hz), but fairly stable and gives ~1-2 ppm/3 years drift rate in power off mode.

[beanflying]

Wonder how much of the noise comes from the Transformer and power supply inside the same box?

[zhtoor]

thanks Mickle T.

a wonderful design for the time...

regards.

-zia