Kt66
Kt66 for sale on Ireland's largest auction and classifieds sites
Gec kt66 rare matched - kt66, - £350.00
Have sale rare • Matched pair gec • Kt66 new original - Free postage - New and Used
Have sale rare • Matched pair gec • Kt66 new original - Free postage - New and Used
Boxed nos gec - nos, clear - £170.00
Boxed nos gec • Kt66 valve date • Code 7220 week - Free postage - New and Used
Boxed nos gec • Kt66 valve date • Code 7220 week - Free postage - New and Used
Boxed nos gec kt66 valve - kt66, - £120.00
Boxed nos gec • Kt66 valve date • Code 7816 week - Free postage - New and Used
Boxed nos gec • Kt66 valve date • Code 7816 week - Free postage - New and Used
Gec kt66 valve - valve, clear - £100.00
Gec kt66 valve • Rubbed print date • Spot welded gray - Free postage - New and Used
Gec kt66 valve • Rubbed print date • Spot welded gray - Free postage - New and Used
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Gec kt66 vintage vacuum tube - kt66, - £75.00
Good condition • Gec kt66 vintage • Vacuum tube valve - Free postage - New and Used
Good condition • Gec kt66 vintage • Vacuum tube valve - Free postage - New and Used
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48 listings · from £6 · avg £178.33
⚠️ These listings were last updated more than 8 days ago.
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Browse 48 kt66 listings currently in our index. Prices range from £6 to £1230.7, with an average of £178.33. 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 →
Gec kt66 electronic tube - gec, - £75.00
Gec kt66 electronic • Tube vintage valve • Tested 5ma classic - Free postage - New and Used
Gec kt66 electronic • Tube vintage valve • Tested 5ma classic - Free postage - New and Used
Kt66 original marshall - kt66, spares - £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
Kt66 gec new and - gec, - £149.00
Avo tested current • Shorts leaks etc • Believed new based - Free postage - New and Used
Avo tested current • Shorts leaks etc • Believed new based - Free postage - New and Used
Kt66 genalex factory matched - kt66, - £127.95
Genalex kt66 factory • Matched pair new • Vacuum tube valve - Free postage - New and Used
Genalex kt66 factory • Matched pair new • Vacuum tube valve - Free postage - New and Used
Marconi kt66 grey glass black - marconi, - £49.00
Marconi kt66 tube • Working order but • Only fair output - Free postage - New and Used
Marconi kt66 tube • Working order but • Only fair output - Free postage - New and Used
Kt66 original marshall spares - kt66, - £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
Kt66 original marshall spares - kt66, - £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 lve vintage retro - lve, 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
Boxed nos gec kt66 - gec, - £180.00
Boxed nos gec • Kt66 valve date • Code 7319 week - Free postage - New and Used
Boxed nos gec • Kt66 valve date • Code 7319 week - Free postage - New and Used
Marconi kt66 cv1075 - kt66, clear - £49.99
Marconi brown base • Twin halo getter • Kt66 valve because - Free postage - New and Used
Marconi brown base • Twin halo getter • Kt66 valve because - Free postage - New and Used
Kt66 valve - kt66, (electronic - £45.42
Gec general electric • Dusty places - Free postage - New and Used
Gec general electric • Dusty places - Free postage - New and Used
Matched pair brimar foreign - matched, - £50.00
Matched pair 6l6gt • Kt66 7581 valves • Tubes brimar foreign - Free postage - New and Used
Matched pair 6l6gt • Kt66 7581 valves • Tubes brimar foreign - Free postage - New and Used
Gec kt66 vacuum tube valve - gec, - £75.00
Gec kt66 vacuum • Tube valve tested • Strong audio vintage - Free postage - New and Used
Gec kt66 vacuum • Tube valve tested • Strong audio vintage - Free postage - New and Used
Kt66 gold tad original - kt66, - £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
Kt66 lve vintage - kt66, retro - £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
Rare marconi kt66 vt75 - rare, fat - £300.00
Marconi british made • Fully tested avo • Vcm 163 - Free postage - New and Used
Marconi british made • Fully tested avo • Vcm 163 - Free postage - New and Used
5881 6l6 kt66 pair tested - pair, - £69.95
When used quad • Amplifiers high quality • Their performance excellent - Free postage - New and Used
When used quad • Amplifiers high quality • Their performance excellent - Free postage - New and Used
Valve tube boxes size x10pcs - tube, - £6.00
Valve tube boxes • Have divider keep • Secure suit 6l6g - Free postage - New and Used
Valve tube boxes • Have divider keep • Secure suit 6l6g - Free postage - New and Used
Shuguang china kt66 cv1075 - shuguang, - £15.00
Kt66 cv1075 valve • Tube shuguang made • China fully tested - Free postage - New and Used
Kt66 cv1075 valve • Tube shuguang made • China fully tested - Free postage - New and Used
Osram marconi kt66 gec grey - gec, - £151.50
Bought this new • Old stock many • Years ago never - Free postage - New and Used
Bought this new • Old stock many • Years ago never - Free postage - New and Used
National electronics kt66 - national, - £16.95
- Free postage - New and Used
- Free postage - New and Used
Kt66 matched pair new - jj, - £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 quad same batch - quad, - £1230.70
Gec kt66 valves • Quad matched this • Have been certificated - Free postage - New and Used
Gec kt66 valves • Quad matched this • Have been certificated - Free postage - New and Used
Nos gec kt66 - kt66, glass - £150.00
Nos gec kt66 • Valve date code • 7152 week 1971 - Free postage - New and Used
Nos gec kt66 • Valve date code • 7152 week 1971 - Free postage - New and Used
Boxed nos marconi kt66 - boxed, valve - £180.00
Boxed nos marconi • Kt66 valve date • Code april 1968 - Free postage - New and Used
Boxed nos marconi • Kt66 valve date • Code april 1968 - Free postage - New and Used
Tad kt66 amplifier - tad, - £18.00
Tube amp doctor • Kt66 bought this • New about years - Free postage - New and Used
Tube amp doctor • Kt66 bought this • New about years - Free postage - New and Used
Kt66 gec vintage - vintage, grey - £450.00
Matched pair tubes - Free postage - New and Used
Matched pair tubes - Free postage - New and Used
Kt66 vt75 gec vintage - kt66, - £1000.00
Vt75 military spec • Matched pair tubes • New unused boxed - Free postage - New and Used
Vt75 military spec • Matched pair tubes • New unused boxed - Free postage - New and Used
Colomor kt66 nos valve tube - colomor, - £30.00
Colomor kt66 test • Results this valve - Free postage - New and Used
Colomor kt66 test • Results this valve - Free postage - New and Used
Sovtek 1622 kt66 beam tetrode - sovtek, - £28.00
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
Kt66 valves matched quad - valves, - £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
Vintage gec kt66 - grey, glass - £200.00
Gec british made • Factory code - Free postage - New and Used
Gec british made • Factory code - Free postage - New and Used
Marconi kt66 valves - (, ) - £281.50
Mwt kt66 valves • Date code 1956 • This valve has - Free postage - New and Used
Mwt kt66 valves • Date code 1956 • This valve has - Free postage - New and Used
Boxed nos gec marconi - boxed, osram - £180.00
Date code april • 1965 spot welded • Gray plates clear - Free postage - New and Used
Date code april • 1965 spot welded • Gray plates clear - Free postage - New and Used
Genalex kt66 vacuum tube - tube, made - £141.13
Genalex kt66 vacuum • Tube made england • Vintage original - Free postage - New and Used
Genalex kt66 vacuum • Tube made england • Vintage original - Free postage - New and Used
Mwt marconi kt66 - kt66, glass - £125.00
Mwt marconi tested • Good avo vcm • 163 - Free postage - New and Used
Mwt marconi tested • Good avo vcm • 163 - Free postage - New and Used
Matched pair gec kt66 with - kt66, - £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
New tubes gec - tubes, cv1075 - £661.57
Unused tubes kt66 • Cv1075 gec very • Strong emission matched - Free postage - New and Used
Unused tubes kt66 • Cv1075 gec very • Strong emission matched - 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 new valve - matched, - £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
Vintage gec kt66 cv1075 - vintage, grey - £125.00
Gec british made • Factory code fully • Tested avo vcm - Free postage - New and Used
Gec british made • Factory code fully • Tested avo vcm - Free postage - New and Used
Boxed marconi osram cv1075 - marconi, - £80.00
Date codes january • 1963 pan getter • Spot welded gray - Free postage - New and Used
Date codes january • 1963 pan getter • Spot welded gray - Free postage - New and Used
Tung sol reissue - reissue, kt66 - £101.40
- Free postage - New and Used
- Free postage - New and Used
Try this: tannoy hpd | 6j1p | vhs player | philips record player | maxell reel tapes | grundig boy | tape recorder | pioneer pl 12 turntable | cv717 | 300b tube
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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 £6, while premium listings can reach £1230.7 — giving you a wide budget spread to work with. The average price of £178.33 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.