Original Mullard SP2
antique radio direct heating pentode tube

SPT2 SP2/H
Vf-2V / If-0,1A
British 7-Pin old (M7A) base
the tube tests very strong, 173%
Ia = 5,2mA
where 3mA is 100% for the new tube
The SP2 is a directly heated battery pentode from 1934, designed for broadcast radio reception.

The SP is a straight pentode with a sharp cut-off rather than the VP valves that were variable μ pentodes like VP2
you will get the tube you can see at the pictures.
I always send the tubes by priority registered mail with tracking number within hours after receiving payment

                                                                                                                                                      Ivette