Kt66
Kt66 for sale on Ireland's largest auction and classifieds sites
Kt66 original marshall spares - original, - £60.00
Kt66 original marshall • Spares these are • Best value quality - Free postage - New and Used
Kt66 original marshall • Spares these are • Best value quality - Free postage - New and Used
Kewtech 1 multifunction - kewtech, 12-in-1 - £894.10
3months old boxed • Leads calibliation certificate • Warranty certificates digital - Free postage - New and Used
3months old boxed • Leads calibliation certificate • Warranty certificates digital - Free postage - New and Used
Gec kt66 tube nib - tube, - £492.52
This valve was • Obviously tested you • Can see one - Free postage - New and Used
This valve was • Obviously tested you • Can see one - Free postage - New and Used
Pair 1950 genalex - 1950's, - £193.14
Pair 1950 genalex • Kt66 7581a audio • Tubes smoke glass - Free postage - New and Used
Pair 1950 genalex • Kt66 7581a audio • Tubes smoke glass - Free postage - New and Used
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Gec kt66 cv1075 clear - kt66, - £180.00
Clear glass cv1075 • Kt66 valve tube • Gec british made - Free postage - New and Used
Clear glass cv1075 • Kt66 valve tube • Gec british made - Free postage - New and Used
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48 listings · from £3.8 · avg £240.42
⚠️ These listings were last updated more than 99 days ago.
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Browse 48 kt66 listings currently in our index. Prices range from £3.8 to £994.99, with an average of £240.42. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about kt66 →
Kt66 original marshall spares - original, - £120.00
Kt66 original marshall • Spares these are • Best value quality - Free postage - New and Used
Kt66 original marshall • Spares these are • Best value quality - Free postage - New and Used
Rare osram kt66 - 2x, - £363.70
Osram kt66 valves • Date code 1948 • Tested avo vcm - Free postage - New and Used
Osram kt66 valves • Date code 1948 • Tested avo vcm - Free postage - New and Used
Kt66 lve vintage retro - kt66, - £150.00
Computer matched quad • Selected gold tested • Tubes made china - Free postage - New and Used
Computer matched quad • Selected gold tested • Tubes made china - Free postage - New and Used
Kt66 gold tad original - tad, - £150.00
Kt66 marshall gold • Tad matched selected • Spares new unused - Free postage - New and Used
Kt66 marshall gold • Tad matched selected • Spares new unused - Free postage - New and Used
Matched quad vintage - vintage, 1960s - £299.99
Matched quad vintage • 1960s gec kt66 • Marconi brown base - Free postage - New and Used
Matched quad vintage • 1960s gec kt66 • Marconi brown base - Free postage - New and Used
Kt66 lve vintage - retro, style - £75.00
Computer matched pair • Selected gold tested • Tubes made china - Free postage - New and Used
Computer matched pair • Selected gold tested • Tubes made china - Free postage - New and Used
Gec kt66 valve tube tested - valve, - £89.10
Gec kt66 valve • Tube tested original • Packing untested good - Free postage - New and Used
Gec kt66 valve • Tube tested original • Packing untested good - Free postage - New and Used
Kt66 gec vintage grey glass - kt66, - £145.00
80.5ma 6.25mav - Free postage - New and Used
80.5ma 6.25mav - Free postage - New and Used
Sovtek 1622 kt66 - sovtek, tetrode - £40.00
Royal mail international • Sovtek 1622 kt66 • Beam tetrode power - Free postage - New and Used
Royal mail international • Sovtek 1622 kt66 • Beam tetrode power - Free postage - New and Used
Gec kt66 clear - gec, valve - £116.99
Tested working good • Condition please view • Pictures - Free postage - New and Used
Tested working good • Condition please view • Pictures - Free postage - New and Used
Kt66 osram black - osram, coated - £291.12
Advance digital tube • Kt66 osram nos • Black coated glass - Free postage - New and Used
Advance digital tube • Kt66 osram nos • Black coated glass - Free postage - New and Used
Matched pair gec kt66 with - gec, - £275.00
Matched pair gec • Kt66 tubes valves • Clear glass brown - Free postage - New and Used
Matched pair gec • Kt66 tubes valves • Clear glass brown - Free postage - New and Used
Kt66 original marshall - original, spares - £30.00
Kt66 original marshall • Spares these are • Best value quality - Free postage - New and Used
Kt66 original marshall • Spares these are • Best value quality - Free postage - New and Used
Kt66 valves matched quad - kt66, - £267.00
Electronic kt66 superb • Very faithful reproduction • Valves what does - Free postage - New and Used
Electronic kt66 superb • Very faithful reproduction • Valves what does - Free postage - New and Used
Gec cv1075 kt66 valve - cv1075, - £125.00
Cv1075 kt66 valve • Tube gec british • Made fully tested - Free postage - New and Used
Cv1075 kt66 valve • Tube gec british • Made fully tested - Free postage - New and Used
Kt66 valve british vintage - valve, - £5.45
Faulty kt66 pictured - Free postage - New and Used
Faulty kt66 pictured - Free postage - New and Used
Kt66 matched pair new - matched, - £120.00
Matched pair tubes • New unused boxed - Free postage - New and Used
Matched pair tubes • New unused boxed - Free postage - New and Used
Gec kt66 grey - gec, - £150.00
Used supplied gec • Box factory code • Brown base - Free postage - New and Used
Used supplied gec • Box factory code • Brown base - Free postage - New and Used
Vintage gec kt66 grey - vintage, glass - £200.00
Gec british made • Factory code - Free postage - New and Used
Gec british made • Factory code - Free postage - New and Used
Vintage usa valve tube - usa, 8 - £3.80
Vintage usa valve • Tube pin octal • Base chassis type - Free postage - New and Used
Vintage usa valve • Tube pin octal • Base chassis type - Free postage - New and Used
Marconi kt66 amplifier - marconi, - £82.86
- Free postage - New and Used
- Free postage - New and Used
Gec kt66 grey glass - gec, - £150.00
Used supplied gec • Box brown base - Free postage - New and Used
Used supplied gec • Box brown base - Free postage - New and Used
Kt66 gold tad original - kt66, - £75.00
Kt66 marshall gold • Tad matched selected • Spares new unused - Free postage - New and Used
Kt66 marshall gold • Tad matched selected • Spares new unused - Free postage - New and Used
Matched pair kt66 clear - , - £850.00
- Free postage - New and Used
- Free postage - New and Used
Kt66 marconi vintage grey - kt66, - £175.00
Kt66 marconi new • Unused boxed - Free postage - New and Used
Kt66 marconi new • Unused boxed - Free postage - New and Used
Matched pair kt66 - , new - £80.00
Valves these are • Specially selected valve • Tubes gold class - Free postage - New and Used
Valves these are • Specially selected valve • Tubes gold class - Free postage - New and Used
Gec kt66 pan - 1, at - £150.00
Osram gec px25 • 6.3 6.8 valve • Tube test results - Free postage - New and Used
Osram gec px25 • 6.3 6.8 valve • Tube test results - Free postage - New and Used
Pair kt66 grey glass - m.pair, - £900.00
Matched pair kt66 • Grey glass black • Plate nos gec - Free postage - New and Used
Matched pair kt66 • Grey glass black • Plate nos gec - Free postage - New and Used
Tad kt66 premium matched - premium, - £84.32
Price matched pair • Legendary old school • Tone tad kt66 - Free postage - New and Used
Price matched pair • Legendary old school • Tone tad kt66 - Free postage - New and Used
Gec british made kt66 cv1075 - british, - £150.00
Kt66 cv1075 valve • Tube gec british • Made nos supplied - Free postage - New and Used
Kt66 cv1075 valve • Tube gec british • Made nos supplied - Free postage - New and Used
Matched pair kt66 clear - pair, - £450.00
- Free postage - New and Used
- Free postage - New and Used
Gec kt66 twin halo - , - £340.00
Matched pair valves • Valve tube date • Codes 7449 7717 - Free postage - New and Used
Matched pair valves • Valve tube date • Codes 7449 7717 - Free postage - New and Used
Golden dragon kt66 - dragon, super - £120.00
Golden dragon kt66 • Super matched pairs • Valves valve tube - Free postage - New and Used
Golden dragon kt66 • Super matched pairs • Valves valve tube - Free postage - New and Used
Kt66 vintage osram - vintage, glass - £250.00
Kt66 osram new • Unused boxed - Free postage - New and Used
Kt66 osram new • Unused boxed - Free postage - New and Used
Kt66 clear glass blk - glass, base - £280.00
- Free postage - New and Used
- Free postage - New and Used
Colomor kt66 nos - , e - £30.00
Colomor kt66 test • Results this valve - Free postage - New and Used
Colomor kt66 test • Results this valve - Free postage - New and Used
Vintage osram kt66 - osram, grey - £125.00
Osram british made • Cup getter factory • Code fully tested - Free postage - New and Used
Osram british made • Cup getter factory • Code fully tested - Free postage - New and Used
Kt66 marconi long grey glass - kt66, - £175.00
Kt66 marconi long • Grey glass new • Unused boxed - Free postage - New and Used
Kt66 marconi long • Grey glass new • Unused boxed - Free postage - New and Used
5881 6l6wgb kt66 tung sol - 6, - £133.72
These were tested • Hickok tester minimum • Acceptable number check - Free postage - New and Used
These were tested • Hickok tester minimum • Acceptable number check - Free postage - New and Used
Matched pair kt66 - pair, - £450.00
- Free postage - New and Used
- Free postage - New and Used
Gec kt66 twin - twin, getters - £340.00
Matched pair valves • Valve tube date • Codes 7717 7651 - Free postage - New and Used
Matched pair valves • Valve tube date • Codes 7717 7651 - Free postage - New and Used
Gec kt66 tube - kt66, batch - £994.99
More black around • Used valve • Wires - Free postage - New and Used
More black around • Used valve • Wires - Free postage - New and Used
Sylvania 5932 6l6 kt66 - 5932/6l6/kt66, brown - £317.34
These are fat • Base version used • Navy they - Free postage - New and Used
These are fat • Base version used • Navy they - Free postage - New and Used
Try this: tannoy hpd | 6j1p | grundig radiograms | vhs player | philips record player | maxell reel tapes | grundig boy | tape recorder | pioneer pl 12 turntable | cv717
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Everything you need to know about kt66
Whether you are looking for a brand-new or second-hand kt66, eBay offers one of the largest selections available online. With 48 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £3.8, while premium listings can reach £994.99 — giving you a wide budget spread to work with. The average price of £240.42 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.