DO IT YOURSELF
TUBE PREAMP-PHONO STAGE
CAUTION! HIGH VOLTAGE!
Observe safety precautions when working with high voltage!
"Golden Middle" reserves the right to make changes in products
not affecting the basic technical characteristics.
Hi-Fi PREAMP-PHONO STAGE "RIAALIGHT" stereo
TECHNICAL SPECIFICATIONS :
Tubes : E180F õ 2 pcs, EÑÑ83 / 6N2P-E õ 1 pcs, ECC88 / 6N23P õ 1 pcs.
Amplification factor (1 KHz):
46 db triode
56 db pentode
Overload :
38 db triode
28 db pentode
Input impedance : 47 KOhm
Nominal input voltage : 3 mV (MM)
Signal noise reduction : <-76 db
RIAA max ± 0,5 db
Min load resistance (-1,5 db) 5 KOhm
Normal load resistance 30 KOhm
THD (500 mV out) <0,045% @ 1 KHz
Switching 1 stage operation triode / pentode.
DIY "RIAALIGHT KIT #1" :
Vacuum tubes : 6J49P-DRU gold pins õ 2 pcs; 6N2P-E õ 1 pcs; 6N23P õ 1 pcs;
Full curcuit diagram;
2 pcs PCBs from a fiberglass (thickness 2 mm):
PCB of power supply type #IP2 85 mm õ 90 mm and PCB of preamp phono-stage 280 mm õ 90 mm;
Complete set of all necessary parts for assembling
(capacitors K71-7, electrolytic capacitors Jamicon, resistors MLT, BC, ULI);
Toroidal power transformer;
Input and output sockets.
This DIY is done on principle "soldered and working".
Practically does not require turning.
DIY "RIAALIGHT KIT #2" :
Vacuum tubes : E180F Valvo gold pins õ 2 pcs; ECC83 õ 1 pcs; ECC88 õ 1 pcs;
Full curcuit diagram;
2 pcs PCBs from a fiberglass (thickness 2 mm):
PCB of power supply type #IP2 85 mm õ 90 mm and PCB of preamp phono-stage 280 mm õ 90 mm;
Complete set of all necessary parts for assembling
(capacitors WIMA MKP10, electrolytic capacitors Jamicon, resistors MLT, BC, ULI);
Toroidal power transformer;
Input and output sockets.
This DIY is done on principle "soldered and working".
Practically does not require turning.
DIY "RIAALIGHT KIT #3" :
Vacuum tubes : 6J49P-DRU gold pins õ 2 pcs; 6N2P-E õ 1 pcs; 6N23P õ 1 pcs;
Full curcuit diagram;
2 pcs PCBs from a fiberglass (thickness 2 mm):
PCB of power supply type #IP2 85 mm õ 90 mm and PCB of preamp phono-stage 280 mm õ 90 mm;
Complete set of all necessary parts for assembling
(capacitors WIMA MKP10, electrolytic capacitors Jamicon, resistors MLT, BC, ULI);
Toroidal power transformer;
Input and output sockets.
This DIY is done on principle "soldered and working".
Practically does not require turning.
DIY "RIAALIGHT KIT #4" :
Vacuum tubes : 6J49P-DRU gold pins õ 2 pcs; 6N2P-E õ 1 pcs; 6N23P õ 1 pcs;
Full curcuit diagram;
2 pcs PCBs from a fiberglass (thickness 2 mm):
PCB of power supply type #IP2 85 mm õ 90 mm and PCB of preamp phono-stage 280 mm õ 90 mm;
Complete set of all necessary parts for assembling
(capacitors K71-7, electrolytic capacitors Jamicon, resistors MLT, BC, ULI);
Toroidal power transformer;
Input and output sockets.
This DIY is done on principle "soldered and working".
Practically does not require turning.
DIY "RIAALIGHT KIT #5":
Vacuum tubes : 6J49P-DRU gold pins õ 2 pcs; 6N2P-E õ 1 pcs; 6N23P õ 1 pcs
2 pcs collected and adjusted PCBs from a fiberglass (thickness 2 mm) :
PCB of power supply type #IP1 85 mm õ 90 mm and PCB of preamp phono-stage 280 mm õ 90 mm
( transitional capacitors WIMA MKP10, electrolityc capacitors Jamicon) ;
Input and output sockets.
The PCBs are fully adjusted and tested.
The independent assembling consists in fixing of PCBs on a screening surface / in a case
and connecting of sockets.
DIY "RIAALIGHT KIT #6" :
Vacuum tubes : E180F Valvo gold pins õ 2 pcs; ECC83 õ 1 pcs; ECC88 õ 1 pcs;
2 pcs collected and adjusted PCBs from a fiberglass (thickness 2 mm) :
PCB of power supply type #IP1 85 mm õ 90 mm and PCB of preamp phono-stage 280 mm õ 90 mm
(transitional capacitors WIMA MKP10, electrolityc capacitors Jamicon) ;
Input and output sockets.
The PCBs are fully adjusted and tested.
The independent assembling consists in fixing of PCBs on a screening surface / in a case
and connecting of sockets.
