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Vintage 1971 HH Electronic IC100 Head Amplifier 100w, serviced & tested.
Iconic 70’s amplifier used by many punk rock groups, pub bands, cover bands etc.
This particular example is period correct for early T.Rex Marc Bolan.
Overall good clean condition commensurate with age. Side handles and top and bottom covers have some scratches and marks. Original perspex panel lights up but is patchy in places, with no cracks. New main power supply capacitors fitted. New fuseholders and fuses fitted to output driver board. All new 4BA top and bottom cover screws fitted. All input/output jacks cleaned and lubricated. All pots cleaned and lubricated. All switches cleaned and lubricated. All voltages checked. Fully tested and sound checked.
The front upper panel features left to right: (Channel 1) Speed, Depth, Presence, Treble, Bass, Volume, then (Channel 2) Brilliance, Treble, Bass, Volume, and a master Reverb rotary controls. The front lower panel features left to right: (Channel 1) Reverb switch, Sustain switch, Bright & Normal input jacks, then (Channel 2) Reverb switch, Bright & Normal input jacks, and illuminated mains switch. The panel glows green for a cool vintage stage look.
The rear panel features a Mains Voltage rotary selector with options for 115V, 210V, 220V, 230V, 240V. Replacement IEC mains input socket, Belling Lee mains fuseholder, two output jacks wired in parallel rated at 100 watts into 4 ohms, then “Slave Output”, “Output to Mixer”, “Vibrato/Reverb Footswitch”, and “Power-Amp Input” jack sockets.
Full spec in more detail:
Serial number 4103 making it the 103rd IC100 ever madeOriginal electroluminescent panel date stamped “21 JUL 1971″Original perspex front panel
Original solid alluminium control knobsOriginal dark grey side handles and original heavily chromed knurled side screws
Original “C core” mains transformer and bridge rectifierOriginal hex key rear panel set screwsOriginal gold mil spec integrated circuits fitted with the exception of one, variously date stamped – IV70, 7108, 7109, 7110.
Original jack socketsNo “Stage Studio” switch on the front or rear panelNo “Sustain Footswitch” jack
Note that the original trouble-prone output driver board and Darlington output transistors were soon replaced in the early seventies with then-current AO3103/5 and 2N3773 transistors date stamped “7340”
Also note that the original Bulgin power inlet socket was replaced in the late 1990’s with a modern IEC type fitted with a built-in mains noise suppression filter. Also, at the same time, the top and bottom covers were lined with alluminium foil in a further attempt to reduce noise.
Sounds very good, and very loud.
Everything works as it should.
More pictures available on request.
Should be good for another forty years reliable service.
I will need a contact telephone number from you for when I book the courier. Price quoted is for fully insured and tracked UK mainland delivery, highlands and islands will be more expensive. Check with me first with your postcode for a firm quote.
Overseas buyers will receive the amplifier through the eBay Global Shipping Program which is fully tracked and insured.
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Category: Musical Instruments:Pro Audio Equipment:Amplifiers
Location: Rochdale, Lancashire