The Q+ Memory Expansion was a small interface from PCML Ltd.
The interface plugged into the Sinclair QL's expansion bus, and fitted completely within the QL's case (making it difficult to remove!).
The interface was sold in various configurations, with 64K, 128K, 256K and 512K RAM versions available, and also a 256K RAM version which had built-in ROM utilities (namely the PCML Toolkit, complete with file spooling to the printer and ram disks.
The original price when the cards were first advertised in April 1985 were:
These prices were later reduced when the 512K version was released:
Title: PCML Q+ Memory Expansion Card
Interface Type: Memory Interface
Connection: Sinclair QL Expansion Bus
Through-Connector: NO
Manufacturer: PCML Ltd
Year First Sold: 1985
Original Price: From £75+VAT.
Accompanying Software: NONE