  We fabricated and tested the single electron R-pump, i.e. a three-junction Al
circuit with on-chip Cr resistors. We show that due to the presence of the
resistors (R > h/e^2 = 25.8 kOhm), the accuracy of electron transfer in the
R-pump can approach the level of 10^-8. Preliminary results of experiment with
the R-pump made at PTB are reported.
