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Glasshouse B9A valve holder board Glasshouse brings you the perfect solution to those constructing an enclosed box pre-amplifier or amplifier that uses B9A base valves. The board measures 55mm x 55mm, with a thickness of 3.2mm allows the fitting of any B9A valve base stocked by hificollective, see the valve base pages to make your selection. The boards now have a copper eath plate on the undersinde, that can be soldered directly to. Note that the turret tags and standoffs do not have electrical contact with the earth plate. The board is fitted by using four M3 standoffs (15mm, 20mm or 25mm available) positioned in the corners of the board. These in turn are fitted to the chassis. The height used is dependent on which base is used, pls consult the table below.You have two options on how to solder up the valve base: 1. Prior to fitting, attach flying leads to the valve base, threading the wire through the appropriately marked 2.5mm diameter hole. Cut to the right length and solder up. 2. The board can be supplied with the silver plated turret tags fitted. On the underside wire up the valve base pins to the appropriate turret tag. Now the board can be fitted and easily wired up. Merits of Glasshouse boards:
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Price list / Options price exclude vat & carriage | |
| Glasshouse B9A valve holder board | £4.00 |
| B9A valve base (SK9CC22) | £1.00 |
| B9A valve base, gold pin (SK9CC22-G) | £2.25 |
| Audio Note B9A valve base, from above fit, (VBASE-015) | £6.50 |
| Audio Note B9A valve base, from below fit, (VBASE-025) | £6.50 |
| CMC Teflon B9A valve base (CMCT_B9A) | £11.50 |
| CMC Ceramic B9A valve base (CMCC_B9A) | £9.80 |
| CMC Bakelite B9A valve base (CMCB_B9A) | £7.95 |
| Glasshouse silver plated turret tags(10 off) | £1.80 |
| M3 x 15mm standoff fitting kit, including screws | £1.00 |
| M3 x 20mm standoff fitting kit, including screws | £1.20 |
| M3 x 25mm standoff fitting kit, including screws | £1.50 |
Glasshouse B9A valve base holder to valve base / standoff height compatibility table ![]() |
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Glasshouse valve base holder showing a valve base "Fitted From Above" ![]() |
Glasshouse valve base holder showing a valve base "Fitted From Below" ![]() |