Burndept Wireless Ltd
Triple Coil Holder
A substantial and very high quality triple coil holder with a bakelite body and base, brass coil pins and a 5:1 geared rotation of the outside coil holders. The centre coil holder is static. The holders are marked as ‘Reaction’, ‘Secondary ATI’ (Antenna Tuning Inductance) and Primary. The Burndept catalogue number is 135.
The advert shown below is taken from the inside cover of Modern Wireless magazine dated June 1925 showing a reduced price of 20 shillings for the triple coil holder and 15 shillings for the dual coil holder.