2262 This was basically a derivative of the 2254
using a motherboard construction but repackaged into a case that matched the dimensions, fixings, and McMurdo two row connector of the Pye Limiter Compressor produced around the same period. Not that many were made and, ironically, I've seen more Pye compressors in Studios than 2262's!
2264 (and its derivatives) was further derivative of the 2254
and, like the 2262, using a motherboard system of assembly and no more B183/283 Class A Output or transformer buffering the diode bridge. It was designed to slot into the space occupied by a standard 8.75" Neve correction unit and was the only 45 series module that I can recall that used an extruded aluminium top and bottom panel. The motherboard wedged into a slot inside this extrusion, trapped by steel expanding pins. The 2264 used an Ernest Turner Gain Reduction Meter that had to have the edges of its clear plastic bezel milled down to fit the module width. This in turn meant that the side edges of the meter were less than one millimetre thick and VERY prone to breaking when inserting the module into a console or rack! Ernest Turner are long gone but there are other meters that fit better to these modules.
(It's worth mentioning that special versions of both the 2254
and 2264 were made with switchable frequency compensationadded to the side chains to enable their use as a De-Esser).
3314 was a 35mm wide derivative of the 2264 for the 53 range of Broadcast Consoles and their custom derivatives. The gain reduction meter was remote mounted.
The next three units are down to me, as Special Orders Manager, in terms of their design heritage (along with all the other hard working techs who assembled them!)
The 33609 (and its 33610, 11, and 12 derivatives) was two 3314 mother boards mounted in a substantial 19" x 2U rack housing along with the PSU card and 2N3055 from the 1777 power supply. It used the aluminium machine turned knobs from the 35mm range of Neve modules and a (legal at the time) EP4 mains connector. A mono version was available in the same case size (a waste of space I corrected later!) and stereo and mono versions were made without the mains PSU for operation on 24 volts. A later version was adapted to fit in the top of 8108/8128 consoles, strung across the complementary power rails. I tried steadfastly to have these units upgraded with a mains neon rocker switch to replace the expensive locking toggle switch and an IC regulator to replace the expensive 1777PSU but the changes (including Sifam Collet Knobs) took place much later, after I had left to firm.