Vintage 6SN7 Tube Preamplifier Bottlehead Foreplay George Wright 6X5 Rectifier
Item History & Price
| Reference Number: Avaluer:49574879 |
6SN7 stereo tube preamplifier based on direct coupled George Wright and Bottlehead Foreplay designs
uses Hickok power transformer and line filter
single stereo input and output (eliminates selector switch)
6X5 tube rectification; 0D3 voltage regulation
CCS plate loads (nice custom dual CCS circuit board)
DC filaments
HLMP-6000 cathode bias
Solen France output caps
Bourns wirewound multiturn volume potentiometers (these are difficult to get used to: instead ...of bumping the volume from 10 o'clock to 10:30, you need to bump it by half or full turns - great for imaging [and I think recommended by John Curl])
this would be best for an experienced tube experimenterOn Feb-04-21 at 17:54:05 PST, seller added the following information:update-- the underside photos in the original ad are out of date in one respect: some time ago I replaced the 1/2 watt carbon comp CCS LED bias resistors with vintage wire wound Mori Ohm 250K resistors after reading the Bottlehead Aniticipation manual that says use wirewounds for 'ultra low noise low current applications' - the photo showing the grey Mori Ohm resistors is how the preamp is currently configuredOn Feb-04-21 at 21:26:08 PST, seller added the following information:
********** a buyer with (2) feedback contacted me with the following message:
uses Hickok power transformer and line filter
single stereo input and output (eliminates selector switch)
6X5 tube rectification; 0D3 voltage regulation
CCS plate loads (nice custom dual CCS circuit board)
DC filaments
HLMP-6000 cathode bias
Solen France output caps
Bourns wirewound multiturn volume potentiometers (these are difficult to get used to: instead ...of bumping the volume from 10 o'clock to 10:30, you need to bump it by half or full turns - great for imaging [and I think recommended by John Curl])
this would be best for an experienced tube experimenterOn Feb-04-21 at 17:54:05 PST, seller added the following information:update-- the underside photos in the original ad are out of date in one respect: some time ago I replaced the 1/2 watt carbon comp CCS LED bias resistors with vintage wire wound Mori Ohm 250K resistors after reading the Bottlehead Aniticipation manual that says use wirewounds for 'ultra low noise low current applications' - the photo showing the grey Mori Ohm resistors is how the preamp is currently configuredOn Feb-04-21 at 21:26:08 PST, seller added the following information:
********** a buyer with (2) feedback contacted me with the following message:
