Preamp valves

We thoroughly test all our preamp valves (tubes) on a digital measuring device pre dispatch. Phase splitter preamp valves (Triodes) can be balanced at no extra cost, please specify when ordering (Checkout/order notes) if you require balanced triodes. Preamp valves included in our valve kits are all specially selected & include phase splitters where required.


All preamp valves are checked for the following:


Gain (Mu)

Transconductance (Gm, mA/Volt)

Noise levels (dbv)


Grid leakage

Short circuits