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The "50 Watt Combo" is a replica of the 1960's 50 watt plexi with a solid state rectifier (you can order this with a GZ34 rectifier tube * if you want) in a combo version. It uses two EL-34 output tubes and a heyboer 50 watt plexi output transformer. The output tranny built for me by heyboer has the correct 3.4k primary plate load. Unlike the 45, which uses a shared cathode, the 50 watt uses a separate cathode arrangement on the first tube, which adds pre-amp gain. A .68 bypass cap on the second stage 33k slope resistor and 500pf cap gives that classic British midrange crunch of the original. You can order this amp with a small switch that takes this .68 bypass cap in and out of the circuit. I also offer my gain stage mod, which gives you a great amount of controllable gain. Also available is the optional negative feedback control that will give you more or less power amp gain. This amp is a rocker! Hand wired on a vintage style turret board just like those great amps of the 60's. Also available in a Head Version.

50 Watt Combo Features:

  • 2 channel 4 inputs (high & low)
  • 2 channel 4 inputs (high & low)
  • High treble & normal channels
  • 2 Volume, Treble, Mid, Bass and presence
  • 2 Matched Svetlana EL34 power tubes
  • 3 JJ 12AX7 preamp tubes
  • 1 Solid state rectifier (GZ34 tube by request)*
  • Heyboer transformers (120/240 volt primary)
  • Output Tranny has correct 3.4 k primary
  • 4, 8 or 16 ohm selector
  • Two speaker outputs
  • Plexi panels
  • Original 50 watt Plexi specs
  • Dijon "mustard" caps allen bradley carbon comp resistors
  • Aluminum chassis
  • Hand wired point to point (Teflon wire)
  • Baltic birch cabinet (black Levant Tolex)


Your choice of:
Weber speakers:
Ceramic Blue Dog
Ceramic Silver Bell
Ceramic 1230 (G12H30)
Ceramic 1230-55

Celestion Speakers:
12" G12H30
12" Greenback
12" Vintage 30

The "50 Watt Combo" Lists for $1,895 Shipping Options Available All Retro-King Amps carry a 5 year limited warranty. 1 yr speakers, 90 days tubes

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