Spectrum 10mm transformers including replacements for some popular TOKO coils, this one being replacement for TOKO 3333 but with the tap at one quarter primary instead of three quarters primary.  In effect it is reversed pins 1 & 3.

These transformers unlike TOKO are a series, 0.6, 1.2, 2.6, 5.3, 11, 23, 45, & 90uH.  Several are available in two versions, one with primary winding tapped a quarter total turns and secondary with low impedance winding and are designated with an L. 

The L version is ideal to use as an aerial input coil or the coil in a Hartley oscillator.

The other types are with centre tapped primary and medium impedance secondary and are designated by an H.

The 90uL coil has minimum inductance of 44uH and maximum 100uH, it has 67t 1-2, 19t 2-3, so has 86t 1-3, and 4t secondary. The Q is 65 at 1MHz.  For those not adept at calculating resonating capacitance, this coil will resonate with 22pF on 3.65MHz, with 82pF on 1.85MHz, with 330pF on 1MHz, and with 1500pF on 455kHz.

The International Tracked Carriage is quite high but it ensures safe and fast delivery.  You can buy up to 10 packs of 5 Spectrum coils from any of the range 1u2H, 2u6L, 2u6H, 5u3HH, 11uL, 23uL, 45uL, 90uL, 105uL and the carriage can be discounted to the same cost as one pack of 5 on request for invoice.  This can only be done using a computer as it doesn't seem possible using a mobile phone.