Update, Feb. 29, 2016.
I bought a precision voltage reference from a supplier in China (refer to post # 23). It was remarkably cheap - but upon test, it was dead. Eventually, I received a refund.
Undeterred, I then purchased one of these:
Quote:
Originally Posted by David G4EBT
There are several e-bay offerings at £10 - £15 post free from China of the ‘KKMOON High Precision Voltage Reference Module AD584kH’ with selectable outputs of 2.5, 5, 7.5 and 10V.
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Which, upon initial test, also proved to be defective. O/P voltages wrong - very wrong. At present, this matter is unresolved.
Al.