How many 405-line sets are operational today?

[ppppenguin]

Sets:
Marconi 702
Marconi 706 (not been tried for a long time)
2x Sony TV9-90 with video monitor option. Incredibly useful
Prowest 14/1 dual standard video monitor. Superb pictures
Ekco T311
Ekco T161 ( I think this working but not sure, not tried for a long time)
GEC BT2147 (partially working)
Thorn 2000 (HMV 2700) partially working. Not sure if I will attempt to run this on 405

405 sources:
3x SCRF405A Auroras, including NTSC colour version
1x Original multistandard Aurora. This has no modulator. Not many ever made
1x World Aurora. This is on long term loan to somebody who has a 240/405 set
Hedghog
My own design FPGA based converter
Homemade modulator (my design, based on Rediffiusion HF modulators)

Location:
London!

I also look after the 405 and analogue 625 source capability at the Vintage Wireless Museum. The 405 stuff comprises 2x SCRF405A Aurora, a Prowest 14/1 monitor, 2x TV9-90 as "off-air" confidence monitors. These form part of a larger system with multiple video sources, routing switcher etc.