Hallo, in dieser Auktion wird 1paar E188CC Röhren angeboten,1x E188CC Siemens (Telefunken Print) und 1x Mullard E188CC .Die Röhren sind in beiden Systemen mit sehr guten werten geprüft!! Der Versand erfolgt sicher verpackt per DHL. ______________ Hello, This auction offers 1 pair of E188CC tubes: 1x E188CC Siemens (Telefunken print) and 1x Mullard E188CC. The tubes have been tested with very good values in both systems!! Shipping is securely packaged via DHL.

CVC CHELMER VALVE COMPANYCVC Chelmer Valve Company, the ebay shop of CVC Components Ltd, was originally founded in 1961 and has become one of the UKs largest STOCKIST of obsolete, hard to find Legacy, Military, Avionic, Industrial and Commercial spares. With over 100 million physical components in stock ready to ship anywhere in the world.WHY USE CHELMER VALVE COMPANY?StockOver 100 million obsolete, discontinued and hard to find electronic components in stockIndustry ExpertiseWe are a long established, experienced, mechanical, electronic, industrial, military and naval component supplier that can cater to your requirements efficiently and effectively.ReliabilityAble to provide you with your orders quickly and efficiently. We have 45000 sq ft storage. Physical Stock of 85 million components ready to ship anywhere in the worldInnovationOur modern supply chain systems allow us to source and supply your exact requirementsRelationshipsWe have long standing, well established relationships with major suppliers and thousands of commercial and retail customersCertified ComponentsAll our products are certified genuine components and include trace to supplier/manufacturer. Independent testing verification can be arranged at an extra cost.

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Verfolgen Sie Seitenaufrufe mit KOSTENLOSE Theke von Autiva

For sale ONE E188CC / 7308 tube Mullard/Zaerix 10000 hours life time, used. Full test protocol in last pic, identical gain 36.4 for both sections. Conditions for test in the left side of test protocol (typical ratings) 100V plate, -1.2V grid, expected 100% results 15mA, 12.5mA/V, gain 33E188CC can direct replace any ECC88, E88CC, 6N23P and similar, especially recommended when is used in low signal low noise applications, like microphones, RIAA etc.Zaerix was a well known reseller long time ago, not a producer, an E188CC UK made can be only Mullard. Original Zaerix box not in good shape, we send the tube in a TFK box, also we can send original box at buyer request. Listened few minutes in an amp, wonderful sound.Price is for one tube, exact one + white box seen in pics.Tested with Roetest V10, the Rolls Royce of tube testers [emissionlab quote], a wonderful german professional system for testing tubes, it shows everything about a tube. Just ask if you need more details, well answer fast.Please look to our other listings, many items bought with only one shipping paid, we combine shipping. We send next day after payment, priority airmail with tracking number. Please be patient with shipping time that can be surprisingly fast or disappointingly slow, depends only by post services. LOT: D120

Perfect matched pair of vintage Mullard E188CC audio tubes - Made in Holland - 1964 - Identical Date Code - Very Rare Tube Summary This is not a listing about audio tubes but an invitation to hear the the sweetest voice on Earth. Yes no other tubes can deliver vocals like the Mullards, whether theyre from Blackburn, Mitcham, or Heerlen, and thats a fact. The Mullard labeled and Holland made E188CC tubes are extremely hard to find today and are being hunted to extinction by audiophiles and sound professionals. Sound Characteristics Be assured - you will not miss one single bit of the legendary Heerlen sound just because the tubes are labeled Mullard. The proud delta symbol in the date code tells you this is 100% textbook natural sound from Heerlen: warm and lively tone with infinitely expansive midrange and nice extension on both top and low ends. The technical advantages of the E188CC/7308 design on these tubes have taken sound to the next level: you get more forward vocals and a wonderful airy top end, super large imaging and incredibly spacious sound stage. Like any other E188CC/7308 tubes, they have low noise to the vanishing point, and that makes these tubes also one of the go-to tubes for details & clarity. Professional Sound Evaluation The pair worked wonderfully and sounded terrific in our professional studio setup for monitoring. - Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC - Amplification: Liquid Platinum Tube Amplifier by Alex Cavalli - Output: Focal Clear MG Pro open-back headphones Our full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above. Professional Tube Testing Both tubes tested Strong NOS (100% - 110%+ mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos): Tube 1: 13,000/12,600 Tube 2: 12,800/12,600 Good tubes start at 7000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and the Mercury 2000s rated mutual conductance (nominal) for new tubes is 12,500. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, its actually quite straightforward: mutual conductance directly translates to a tubes ability to amplify sound so the higher the numbers the better. Appearance & cosmetic condition We treasure this pair also because of the pristine condition of both tubes (clear inscription and clear date codes), which is amazing given the tubes age. What makes this pair even more rare is the identical date code on both tubes: delta 4C1 (delta = Heerlen, 4 = 1964, C = March, 1 = 1st week of the month) Shipping Policy - Ship worldwide! Flat-rate shipping within the US. - Same business day handling. Orders placed by 2:00PM US Pacific Time on weekdays are posted on the same day, otherwise the next business day. - Combined shipping available - request invoice for total before making payment or receive shipping credit after order ships. - Customers outside the US please pay extra attention: International shipping is through USPS First Class Mail International by default. Its the least expensive option (even cheaper than eBay International Shipping) but may take longer than other carriers. If you prefer to use a different carrier please contact us before you buy so we can get you the correct shipping rates. Return Policy - Please READ carefully First of all, returns are acceptable as long as you are reasonable. Soundlumia sets extremely high quality standard for the products we deliver. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation before they are approved for listing AND before we ship them to customers. So the defective item case doesnt exist and please do not bother trying - this type of returns will NOT be accepted without proof that tubes do not work and we will open a dispute with eBay. Sound experience is a very subjective thing, and lets be real its not that easy to run into compatibility issues between amps and tubes (so that one wont fly, either.) Please contact us to work things out before submitting return requests claiming item is defective or item not as described. We would really appreciate your respect to the professional work we have done (sourcing, testing & matching tubes, evaluating tube sound, sharing our sound experience with you, packing and shipping) to make these wonderful vintage tubes available to you at reasonable prices. Secondly, if you are a tube roller looking to game the return system, Number One STOP. Soundlumias founder is a seasoned sound professional who has advised orchestras and music studios in sound production in USA for over two decades, and knowing sound is the minimum skill requirement of our team. No tricks here please. Abusive behaviors will be reported to eBay immediately and negative feedback will be left to your account - thats guaranteed. We have already reported several abusers and eBay has ruled in our favor the dispute cases. We are more determined than ever to continue working with eBay to help rid of these unprofessional, unjustified, unkind, unfair and unacceptable abuses that are detrimental to the eBay marketplace, the vintage tubes market and the audiophile community.

2 old stock matsu japan e188cc/7308 vintage import grail tone sq audio tubesvery rare high resolution leaf springs w/ taper waist distortion reducerrugged upgrade vs e88cc/6922 design / super screened special comms grade(+less ear fatigue vs dgetters) ~cali acoustics~~see our other listings for alternate listening positions, buy/bid/best offer!~ vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram (active) / caliacoustics.com (soon!) ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34~ ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

old stock matsu japan e188cc/7308 vintage import sq series audio tube, very rare comms gradegrail hifidelity leaf spring getter peak resolution w/ taper waist distortion reducerrugged upgrade over e88cc/6922! less ear fatigue vs dgetters ...closest to e188cc mullard?!?105/95 % mutual gm near nos, great resolve for amps mics vocals instruments+ ~see other listings for alternate listening position experiences! bid/buy/best offer~~cali acoustics~ ~hifidelity tone vintage vacuum tube pro audio warm bright lofi hifi~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk / caliacoustics insta6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc12ax7 12au7 12at7 / ecc83 ecc82 ecc816bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34

2 old stock matsu japan e188cc/7308 vintage import sq series audio tubes, very raregrail hifidelity leaf spring getter peak resolution w/ taper waist distortion reducerrugged upgrade over e88cc/6922! less ear fatigue vs dgetters ...closest to e188cc mullard?!?comms special edition 116/108~118/108 % gm great resolve for amps mics vocals instruments+ ~more listening positions available! bid/buy/best offer~~cali acoustics~ ~hifidelity tone vintage vacuum tube pro audio warm bright lofi hifi~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk / caliacoustics insta6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc12ax7 12au7 12at7 / ecc83 ecc82 ecc816bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34

2 old stock matsu japan e188cc/7308 vintage import sq series audio tubes, very raregrail hifidelity leaf spring getter peak resolution w/ taper waist distortion reducerrugged upgrade over e88cc/6922! less ear fatigue vs dgetters ...closest to e188cc mullard?!?comms special edition 104/94~110/86 % gm great resolve for amps mics vocals instruments+ ~more listening positions available! bid/buy/best offer~~cali acoustics~ ~hifidelity tone vintage vacuum tube pro audio warm bright lofi hifi~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk / caliacoustics insta6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc12ax7 12au7 12at7 / ecc83 ecc82 ecc816bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34

2 old stock matsu japan e188cc/7308 vintage import grail tone sq audio tubesvery rare high resolution leaf springs w/ taper waist distortion reducerrugged upgrade vs e88cc/6922 design / super screened special comms grade(+less ear fatigue vs dgetters) ~cali acoustics~~see our other listings for alternate listening positions, buy/bid/best offer!~ vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram (active) / caliacoustics.com (soon!) ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34~ ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

I HAVE FOR SALE A RARE MULLARD AMPEREX E188CC 7L1 VR7 ?6G1 CODE FROM HEERLEN JULY 1966 GOLD PIN - NOS SUPERB TUBE IN BEAUTIFUL CONDITION AND FULL WORKING ORDER ??AVO VCM163 TESTED READINGS - TUBE 1 - Ia 15.2/17.1 gm 13.7/14.0 100% = Ia 12.0 gm 11.5 PLEASE MAKE PAYMENT IMMEDIATELY AS I WILL BE GOING ON HOLIDAY SHORTLY AFTERIF PAYMENT IS NOT RECEIVED IN TIME I WILL NOT BE ABLE TO SHIP UNTIL THE 15TH AUGUST - BY BIDDING ON THIS AUCTION YOU ACCEPT THESE CONDITIONS ?

4 likely used old stock matsu japan e188cc/7308 vintage import sq series audio tubesvery rare grail hifidelity leaf spring getter resolution w/ taper waist distortion reducerrugged upgrade over e88cc/6922 / less ear fatigue vs dgetters / closest to e188cc mullard?!comms grade screened editions, lower gain quad great resolve for tube mics vocals instruments ~see our other listings for alternate listening positions, buy/bid/best offer!~~cali acoustics~ vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram / caliacoustics.com (soon!) ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34~ ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

4 likely used old stock matsu japan e188cc/7308 vintage import sq series audio tubesvery rare grail hifidelity leaf spring getter resolution w/ taper waist distortion reducerrugged upgrade over e88cc/6922 / less ear fatigue vs dgetters / closest to e188cc mullard?!comms grade screened editions, lower gain quad great resolve for tube mics vocals instruments ~see our other listings for alternate listening positions, buy/bid/best offer!~~cali acoustics~ vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram / caliacoustics.com (soon!) ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34~ ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

2 old stock matsu japan e188cc/7308 vintage import grail tone sq audio tubesvery rare high resolution leaf springs w/ taper waist distortion reducerrugged upgrade vs e88cc/6922 design / super screened special comms grade(+less ear fatigue vs dgetters) ~cali acoustics~~see our other listings for alternate listening positions, buy/bid/best offer!~ vintage hifidelity tone / vacuum tube pro audio / warm bright lofi hificaliacoustics instagram (active) / caliacoustics.com (soon!) ~6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc~~12ax7 12au7 12at7 / ecc83 ecc82 ecc81~ ~6bq5 el84 ~ 6267 ef86 ~ 6aq8 ecc85~ 6ca7 el34~ ~preamps stereos vocals instruments mics rode k2/ntk audio technica at-4060 bluemics wooaudio liquidplatinum aesthetix cat audioresearch arc echo ear herron decco lector manley horizons conrad frontiers pathos marantz vac psaudiobhk +more apps~

Mullard 7308-7245-e188cc Cv4108 Pin Dorati Nuova Selezione Tektron.

NOS Set of six Mullard E188CC tubes w/gold pins. Made in Great Britain. Loads of positive reviews on these tubes. Collectible! Some wear on the tube markings. Terms and conditions - PLEASE READ! Changes to PAYPAL refund: Due to recent policy changes at PAYPAL where they will not be refunding their portion of the PAYPAL fees, any refund that is requested to us will be treated likewise. In other words, when you send over a payment, the fee that PAYPAL takes out, will no longer be refunded back to you should you request a refund or we have to do a refund because you did not meet our transactional policy (like asking us to ship to a different address that is on the PAYPAL payment). We know this is unfair and have filed a complaint with Better Business Bureau. Hopefully, they will be able to “persuade” PAYPAL to drop this ridiculous policy. If you think this policy is ridiculous, pls contact your local BBB and file a similar complaint. That will add some weight to our filed complaint.TRANSACTIONS on eBay: ALL transactions must be completed on eBay. NO EXCEPTIONS. We will not respond to offers or suggestions on completing the transaction outside of eBay. Do not ask us to contact you directly outside eBay. If you find an item here on our eBay store that you are interested in purchasing, please conclude the transaction here on eBay.PRODUCT INFO: All items are fully tested and evaluated. If an item is not working properly, it will be mentioned in the listing. So read carefully. Cosmetic conditions will also be clearly laid out in the listing. But because everyone has a different standard, what is an 8/10 condition to me may be a 6/10 condition to you. So it is important you check out every picture on the listing. All pictures are of the actual item and taken just prior to listing it on eBay. All opinions expressed on our listings are our own and based on our evaluation in our system. They are not Gospel truth and should not be treated as such. Every system, every room and every conditions are different. We do not guarantee the result we get in our system will be the same in yours. WHAT KIND OF PRODUCTS WE SELL: We are a used hifi store so everything is used. So no warranty of any kind is offered or expressed. If there is a balance factory warranty from the manufacturer, you should check with them to see if it’s transferable. See above paragraph, everything is tested prior to selling and if there is any issue, we would list it in the listing. So it’s important you read every word in our listing. Occasionally, we may get dealer demo units, NOS (New Old Stock) or dealer excess inventory. Again, you need to check with the manufacturer if they will continue to honor any kind of warranty to you. PAYMENT INFO: PayPal payment is preferred and expected within 3 days after listing has closed. If payment is made through PAYPAL, we will ONLY ship to the address on the PAYPAL payment. NO EXCEPTIONS. SHIPPING: Item will be shipped within 24 hours of payment clearance except late Friday afternoon, Saturday, Sunday and Public Holidays. Tracking numbers will be provided on all shipments. We ship via FEDEX and USPS with insurance and signature required. In the very rare event that an item arrives not as described in our ads, we will resolve the issue(s) with the customer to their satisfaction. Returns are not accepted for shipping damage. If somehow the item arrives damaged, the buyer will need to inform us immediately so that we can get the claim process rolling. We will assist every way we can to get your money back. But this will be rare as we professionally pack every item that goes out to survive the rigor of shipping regardless of value. All orders will be insured and declared at full purchase value. If you want us to declare it at a lower value, you will need to fill out a form authorizing us to declare it at the amount you want us to and that you will assume all risk at the lowered value. And that includes insurance claim should the package be damaged or go missing during shipping. RETURNS: There are absolutely no returns for any items shipped outside the United States. International purchases for all items are as-is. The buyer assumes all cost of return shipping and handling. The only variation of this is if the item you receive is not the item you bought. In the rare event you have a change of mind (buyers remorse) after receiving the item; we may take the item back under our buy back quote or impose a re-stocking of 20% of the original purchase price. Cost of return shipping is your responsibility. This is a case to case basis and not an outright offer to accept every and any returns back. This is why it is important to read our listing carefully. Everything and anything is described in it with all pertinent information for you to make an informed decision. If you have any questions, ASK! DECLARED VALUE: All overseas purchases will be declared based on purchase price. NO EXCEPTION. This is because;1) For your protection as the declared value is also the insured value. 2) eBay and PAYPAL policies dictate that all declared value must be the purchase or transacted price.We know this may be tough in some countries because of your high duties so we will make exceptions but you need to contact us first and work out the details to complete your purchase. We will not entertain any requests after you have made the purchase and paid for it. PARTS OR REPAIRS: All items sold as parts or repairs are NOT returnable. Please read the listing carefully and understand what you are bidding/buying before committing. FRAUDULENT ACTIVITY: Due to recent actions by a few rotten apples we will be tagging all our items with tamper proof labels. If the labels are in any way removed or shows attempted action to remove it, we will be reporting the buyer to the relevant authorities for fraud. And if the buyer does a switch-a-roo where the labels have been removed or desecrated in any way, we will also report this fraudulent activity and will not honor any refunds or returns or exchanges.

                                                                                                                                                                        HOTLINE:01403 785600   E188CC CV4108 MULLARD GOLD PIN MATCHED PAIR NOS VALVE TUBE (LC18) E188CC CV4108 MULLARD GOLD PIN MATCHED PAIR NOS VALVE TUBE (LC18) E188CC MULLARD MADE IN ENGLAND CV4108 KB/D MILITARY SPEC. GOLD PIN, PARASOL GETTER 1970 DATE CODE PAIR (2 TUBES) NEW AND UNUSED         Shipping Shipping cost:AS SHOWN ABOVE Delivery time:DEPENDS ON SHIPPING METHOD AND LOCATION, WE AIM TO SEND ORDERS WITHIN 1 WORKING DAY Payment We accept the following payment methods: PayPal Please contact us if you have any questions. Service WE AIM TO SHIP ORDERS WITHIN 1 WORKING DAY IF YOU FIND YOU HAVE A PROBLEM WITH YOUR ORDER ON DELIVERY PLEASE CONTACT US AND WE WILL RESOLVE ANY ISSUES

2 grail status hifidelity 7308/e188cc gold pin matsu clear tone stereo tubesspecial leaf spring getter ultra high resolution (without the dgetter ear fatigue?!)legendary tight waist microphonic reducer and comms grade premium screenedvery rare collectible pair! audio grade full mutual gm test match balance leak short gas+professional extension sweetest stage for vocals preamps stereos tube mics instruments +moreships worldwide! well packed w/ old tube boxes ~see our other listings for alternative listening positions! best offer enabled~~cali acoustics~ ~stereos preamps vocals instruments tubemics lofi/hifiand more e88cc 6dj8 ecc88 e188cc warm/bright vintage tone hifidelity apps~~rode mics liquid platinum woo audio aesthetix cat audioresearch arc ear herron decco lector manley horizons echo bluemics conrad frontiers pathos vac and more~

2 grail status hifidelity 7308/e188cc gold pin matsu clear tone stereo tubesspecial leaf spring getter ultra high resolution (without the dgetter ear fatigue?!)legendary tight waist microphonic reducer and comms grade premium screenedvery rare collectible pair! audio grade full mutual gm test match balance leak short gas+professional extension sweetest stage for vocals preamps stereos tube mics instruments +moreships worldwide! well packed w/ old tube boxes ~see our other listings for alternative listening positions! best offer enabled~~cali acoustics~ ~stereos preamps vocals instruments tubemics lofi/hifiand more e88cc 6dj8 ecc88 e188cc warm/bright vintage tone hifidelity apps~~rode mics liquid platinum woo audio aesthetix cat audioresearch arc ear herron decco lector manley horizons echo bluemics conrad frontiers pathos vac and more~

HI . Dear byers . I offer for sell lot of 1Pc little used stong tested tube of model E188CC MULLARD with gold pins original vintage production , the tube are in very good condition and have a test results of 100% the tube are with deleted inscription . This price for lot of one / 1 / tube .We are a new seller company in Ebay , but we have a lot of experience in the electronics trade . The products we offer for sale are old vintage production which we buy from the army or from large manufacturers . After you buy a product from us we will pack securely and ship your purchase within 48 hours or the first possible business day after the holidays . The tubes are measured on a tube tester and have perfect electrical emissions, we are not responsible and do not accept payment and refunds in the presence of noises and hums. If you want us to issue you an invoice for the purchase, please mention this in the payment form . For combined shipping please write to us to specify the exact quantities and weight to calculate the delivery price .The shipments are sent worldwide with priority mail and tracking number by Bulgarian Post or Deutsche post . In case of a problem with the shipments, please contact us first to find a solution to the problem before contacting with Ebay. All additional fees you pay are charged by ?bay under the law of your country . Thank you for interest see my ll other items for sell.

My Ref: (V-0837) Mullard E188CC Valve Tested very well on my PAC912 tester Unboxed

Perfect matched pair of vintage Mullard E188CC audio tubes - Made in Holland - 1964 - Identical Date Code - Very Rare Tube Summary This is not a listing about audio tubes but an invitation to hear the the sweetest voice on Earth. Yes no other tubes can deliver vocals like the Mullards, whether theyre from Blackburn, Mitcham, or Heerlen, and thats a fact. The Mullard labeled and Holland made E188CC tubes are extremely hard to find today and are being hunted to extinction by audiophiles and sound professionals. Sound Characteristics Be assured - you will not miss one single bit of the legendary Heerlen sound just because the tubes are labeled Mullard. The proud delta symbol in the date code tells you this is 100% textbook natural sound from Heerlen: warm and lively tone with infinitely expansive midrange and nice extension on both top and low ends. The technical advantages of the E188CC/7308 design on these tubes have taken that sound to the next level: you get more forward vocals and a wonderful airy top end, super large images and incredibly spacious sound stage. Like any other E188CC/7308 tubes, they have low noise to the vanishing point, and that makes these tubes also one of the go-to tubes for details & clarity. Appearance & cosmetic condition We treasure this pair also because of the pristine condition of both tubes (clear inscription and clear date codes), which is amazing given the tubes age. What makes this pair even more rare is the identical date code on both tubes: delta 4C1 (delta = Heerlen, 4 = 1964, C = March, 1 = 1st week of the month) Professional testing & sound evaluation Both tubes tested Strong NOS (100% - 110%+ mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos): Tube 1: 14,500/13,700 Tube 2: 13,500/13,500 Good tubes start at 7000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and the Mercury 2000s rated mutual conductance (nominal) for new tubes is 12,500. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, its actually quite straightforward: mutual conductance directly translates to a tubes ability to amplify sound so the higher the numbers the better. The pair worked wonderfully & sounded terrific in our test amp (Liquid Platinum by Alex Cavalli.) during professional sound evaluation. Shipping - Customers outside the US please pay attention Same business day handling. Combined shipping available multiple purchases. Ship worldwide! Flat-rate shipping within the US. International shipping is through eBay International Shipping program by default. Its the least expensive option and customs declaration is automated but it may take longer than other carriers. If you prefer to use a different carrier please contact me before you make payment so I can get you the correct shipping rates ahead of time. Return Policy - Please READ carefully First of all, returns are acceptable. All the tubes I list for sale are guaranteed to work because we run professional tests and listening sessions on them before packing. However, given that sound quality is an extremely subjective thing and its also not uncommon to run into combability issues because of different amp designs, please work with me before submitting a return request through eBay or opening a item defective or not working case. I would really appreciate it. I do my best to make you happy with your purchase but please respect the professional work (matching & testing tubes and evaluating sound) I have done to make these wonderful vintage items available to you at a reasonable price. Secondly, if you are a tube roller looking to game the return system, Number One STOP. I am a professional audiophile for over two decades and I advise orchestras and music studios in sound production so I do know what I am talking about when it comes to sound and equipment - tubes, headphones, DACs, amps - you name it. So no tricks here please. Abusive behaviors will be reported to eBay immediately and negative feedback will be left to your account - thats also guaranteed.