Hiwatt 100W DR103

Hiwatt DR103 faceHiwatt DR103 back face1974 …

Hiwatt DR103 Mullard EL34Hiwatt DR103 Mullard tube preampHiwatt DR103 Mullard Partridge transformersPreamp and power Mullard tubes, Partridge transformers …

Hiwatt DR103 bulgin missingHiwatt DR103 bulgin missing 2An horrible Bulgin AC-chassis jack ablation !

Hiwatt DR103 old capsOops, old RS cap (the grey one) -> recap needed !

Hiwatt DR103 clean wiringComponents easily accessible and very clean wiring !

Hiwatt DR103 screwsOn of the screws that maintain the chassis is missing. Diameter is 5mm, an old thread of 0.9mm, hard to find a replacement. Washers are missing, too, so the chassis is badly and loosely fixed.

Hiwatt DR103 recapped 1Hiwatt DR103 recapped 2Hiwatt recapped !

Hiwatt DR103 screws replacedScrews replaced

Hiwatt DR103 ac jack replacedPower jack replaced

Hiwatt DR103 done !Done !

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3 Responses to Hiwatt 100W DR103

  1. Mark Perry says:

    I’m trying to figure out what tube is the phase converter on my 1978 DR-103.

  2. t-geek says:

    Hi Mark,

    I think it is, as previous 4 inputs models, this one : HIwatt DR 103 Phase inverter

    It is either a 12AT7 (ECC81 : more headroom) or a 12AX7 (ECC83 : more gain)

  3. Thean says:

    Hi, thank you for this info. I need to know what capacitors (if I change the whole bunch) I would need. If you can maybe supply me with a bill of materials, if you’ll be so kind.

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