wiki:ThirdTubeAmp

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

Vertical6EM7Build

Or maybe this: http://diyaudioprojects.com/Tubes/6EM7-SET-Amplifier/

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 21 months ago Last modified on Mar 13, 2018, 11:56:38 AM