MiniBlok SET
1 W/ch
6CY7 Amp
1 W/ch
Thinking to build 6CY7 SET (forum)
Suggest in forum here to use an alternative output transformer, the GXSE5-55K.
Notes: "Check your plate dissipation. If it's above 5.5W then drop the B+ a little. If not, then leave it alone. My guess is that you're probably fine." (add 100 ohms in B+ if needed)
Rough cost estimate:
2 6CY7 $ 6.00 $ 12.00
1 6CA4 $15.00 $ 15.00
1 269EX $48.23 $ 48.23 Power transformer
1 193H $37.72 $ 37.72 First filter inductor
2 154M $12.80 $ 25.60 Second filter inductors
2 GXSE5-5.5K $20.12 $ 40.24 Output transformers
$178.79 Total above
Vertical Amp (6EM7)
2.2 W/ch
Project page: http://diyaudioprojects.com/Tubes/6EM7-SET-Amplifier/
Built in 2018! See Vertical6EM7Build and http://ohm.bu.edu/~hazen/TubeAmp/#vert
2 6EM7 $10.00 $ 20.00 Average eBay ($30 ea new)
1 6CA4 $15.00 $ 15.00 Rectifer
1 XPWR013-120 $53.68 $ 53.68 Power transformer
2 GXSE10-8-5k $29.84 $ 59.68 Output transformers
1 (see below) $35.00 $ 35.00 Alternate [1] (145 ohms)
2 1H 50ohm $ 9.78 $ 19.58 Triad C-24X
Total $202.94
Main filter choke: https://www.rfparts.com/chokes-inductors/choke-dcfilter/20c54.html (but $15 shipping too)
Alternates:
- Hammond 193D 8H 150mA (75 ohms, $45)
- Hammond 159P 10H 125mA (155 ohms, $27)
- Edcor CXC100-7H-150mA (104 ohms, $49)
- Edcor CXC125-10H-200mA (75 ohms, $64)
Lacewood Amp
3.1 W/ch
1 Hammond 270FX $74.24 $74.24 Power transf
1 XPWR163 $62.09 Alternate pwr tran
1 Hammond 193J $58.83 $58.83 10H choke
1 CXC100-7H-150mA $47.01 Alternate inductor
2 Triad C-24X $ 9.78 $19.56 1H choke
1 5U4GB $15.00 $15.00 Rectifier
2 6V6GTA $ 7.50 $15.00 Approx eBay price
2 GXSE10-5K $29.84 $59.68 Output transf
Total $242.31
Last modified 4 years ago
Last modified on Dec 30, 2019, 9:33:38 AM
