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    • WEM / WATKINS >
      • Watkins Clubman
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      • WEM Control ER15 No. 1
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      • Wem Watkins Copicat Mk 3
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      • Fender Twin Reverb 1972 Silverface
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        • Lab Series L2 Service and Repair
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    • Hiwatt Lead 50R Combo
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      • Marshall Artiste
      • Marshall Superbass Mk2 100W Head and Cab Service Repair
    • Miscellaneous Amps >
      • Harmony H307x
      • Hotpup 5F1 Champ
      • Impact 60
      • Mystery Amp
      • RSC Bass Major
    • Orange >
      • Orange OR120 1970s Service and Repair
      • Orange TH 30 repair
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      • Selmer Constellation 20
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      • Vox AC 10 (JMI)
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      • Vox AC 50 Repair and Overhaul
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OLDAMPS
  • Repairs & Servicing
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    • Filmosound Guitar Amps
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    • WEM / WATKINS >
      • Watkins Clubman
      • Watkins Westminster
      • Watkins Westminster Mk 9
      • WEM Control ER15 No. 1
      • WEM Control HR 30
      • WEM Dominator Mk3
      • Watkins Copicat Mark 2
      • Wem Watkins Copicat Mk 3
      • Wem ER100
      • Wem PA100
    • Baldwin Burns Amplifier
    • Carlsbro CS 60 PA
    • Elpico AC52
    • Leo Fender >
      • Fender Concert Repair
      • Fender Twin Reverb 1977 Silverface
      • Fender Twin Reverb 1972 Silverface
      • Fender Blues Deluxe
      • Fender Musicmaster Bass Amp
      • Musicman RP 112 Sixty-five
    • Gibson >
      • Gibson Mercury
      • Gibson Falcon GA19RVT
      • Lab Series >
        • Lab Series L2 Service and Repair
        • Lab Series L5 100W Combo (Gibson/Norlin)
    • Hiwatt Lead 50R Combo
    • Marshall >
      • Marshall Artiste
      • Marshall Superbass Mk2 100W Head and Cab Service Repair
    • Miscellaneous Amps >
      • Harmony H307x
      • Hotpup 5F1 Champ
      • Impact 60
      • Mystery Amp
      • RSC Bass Major
    • Orange >
      • Orange OR120 1970s Service and Repair
      • Orange TH 30 repair
    • Schaller KV 40
    • Selmer >
      • Selmer Constellation 20
      • Selmer Treble & Bass Mk 2
      • Selmer T&B 50R SV
    • Traynor YGL 3 Mark 3
    • Tripletone Amp Conversion
    • VOX >
      • Vox AC 10 (JMI)
      • Vox AC 30 TB Restoration
      • Vox AC 50 Repair and Overhaul
  • Blog
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  • Other
    • Marconi C10A radio
    • Interesting Waveforms

Wem Dominator Mk 3

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WEM Dominator Mk3 Overhaul and Noise Reduction
If you have a Wem Dominator Mk3, a Power Musette or a Mk1 Bass, it probably hums quite loudly, enough to make it unsuitable for recording.  I have worked on several of these and they all hummed, regardless of the condition of the filter caps, valves and the rest of the components. 

After some serious investigations on this basically mint condition, hardly used specimen that had excellent Mullard valves and new electrolytics installed, I figured out why they hum and re-arranged some of the wiring according to my understanding of physics.  Just a couple of small modifications can reduces the hum to almost nothing and it is well worth having done alongside a service, repair or overhaul.  It does not alter the original circuit in any way.  I also do a small modification that allows you to use any make of EL84 in your Dominator.

I have overhauled and de-noised several of these great sounding amps for recording musicians and they were all delighted with the results.
Musicman RP 112 Sixty-five            JMI Vox AC 10
Elpico AC52                                      Carlsbro CS 60
Filmosound Amplifiers                    Hiwatt Lead 50R
Lab Series L2                                    Burns
Lab Series L5                                    Fender Twin Reverb
Selmer Constellation 20                  Fender Musicmaster Bass
Selmer Treble & Bass Mk 2              Impact 60
Schaller KV40                                   Northcourt 50
Fender 5F1 Champ                           RSC Bass Major
Traynor YGL 3 - Mark 3                    Mystery Amp
Watkins Westminster                      Denco 912-Plus
Denco 912-Plus                                 Interesting Waveforms
Wem Dominator Mk 3                       Mullard 5-10
Wem Watkins Copicat Mk 3              Decca Amp
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  • Repairs & Servicing
    • Guitar Amp Service & Repair
    • Business Card
  • Filmosound
    • Filmosound Guitar Amps
    • Filmo New Style
    • Filmonator Prototype
    • Testimonials
  • Contact
  • Amps & Stuff
    • WEM / WATKINS >
      • Watkins Clubman
      • Watkins Westminster
      • Watkins Westminster Mk 9
      • WEM Control ER15 No. 1
      • WEM Control HR 30
      • WEM Dominator Mk3
      • Watkins Copicat Mark 2
      • Wem Watkins Copicat Mk 3
      • Wem ER100
      • Wem PA100
    • Baldwin Burns Amplifier
    • Carlsbro CS 60 PA
    • Elpico AC52
    • Leo Fender >
      • Fender Concert Repair
      • Fender Twin Reverb 1977 Silverface
      • Fender Twin Reverb 1972 Silverface
      • Fender Blues Deluxe
      • Fender Musicmaster Bass Amp
      • Musicman RP 112 Sixty-five
    • Gibson >
      • Gibson Mercury
      • Gibson Falcon GA19RVT
      • Lab Series >
        • Lab Series L2 Service and Repair
        • Lab Series L5 100W Combo (Gibson/Norlin)
    • Hiwatt Lead 50R Combo
    • Marshall >
      • Marshall Artiste
      • Marshall Superbass Mk2 100W Head and Cab Service Repair
    • Miscellaneous Amps >
      • Harmony H307x
      • Hotpup 5F1 Champ
      • Impact 60
      • Mystery Amp
      • RSC Bass Major
    • Orange >
      • Orange OR120 1970s Service and Repair
      • Orange TH 30 repair
    • Schaller KV 40
    • Selmer >
      • Selmer Constellation 20
      • Selmer Treble & Bass Mk 2
      • Selmer T&B 50R SV
    • Traynor YGL 3 Mark 3
    • Tripletone Amp Conversion
    • VOX >
      • Vox AC 10 (JMI)
      • Vox AC 30 TB Restoration
      • Vox AC 50 Repair and Overhaul
  • Blog
  • For Sale
    • Amp Sales
    • Speaker Sales
  • Other
    • Marconi C10A radio
    • Interesting Waveforms