Perfect matched & balanced pair of vintage Siemens E88CC/6922 Audio Tubes - Munich 1961 - Practically same date code - Strong NOS Product Summary Stronger than time! This is the classic beauty in sound, admired by audiophiles for almost 60 years and will still be our top choice in the next 60 years. Particularly, the early 60s Siemens tone is considered the reference sound for serious classical listeners who need to upgrade the sound quality at the phono stage. Sound Characteristics The airy and transparent sound produced by these vintage Siemens tubes has been unrivaled even to this day. The magically extended yet never tizzy highs, coupled with the slightly focused upper mid-range, deliver a clear presentation of the entire frequency spectrum, completed by the precise and deep controlled bass. And the most defining sound characteristic of Siemens E88CC tubes is their ability to retrieve the deepest levels of detail in sound, and these hidden sonic layers can go a long way to revealing the subtle ambient clues that help complete building a truly 3D holographic presentation. While as quiet and analytical as the best Telefunken E88CC tubes, Siemens E88CCs produce a warmer, smoother and more musical sound. To see how the two German titans in vintage tubes compare to each other, please check out our full sound review of 60s Telefunken E88CC here: https://www.ebay.com/itm/266252586987 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 (110%+ mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos): Tube 1: 14,800/15,100 Tube 2: 14,700/14,900 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 Despite some loss of paint on one of the tubes, this pair overall is in great cosmetic condition. The identical 3-line Munich date codes etched on the glass are perfectly visible on both tubes: A0 1# 1G (A0 = E88CC, # = Munich, 1 = 1961, G = July)A0 1# 1H (A0 = E88CC, # = Munich, 1 = 1961, H = August) Shipping Policy - Ship worldwide! Flat-rate shipping (USPS First-Class) 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. Please 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 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.

Perfect matched & balanced pair of vintage Siemens E88CC/6922 Audio Tubes - Munich 1964 - Strong NOS Tubes Summary Stronger than time! This is the classic beauty in sound, admired by audiophiles for almost 60 years and will still be our top choice in the next 60 years. Particularly, the early 60s Siemens tone is considered the reference sound for serious classical listeners who need to upgrade the sound quality at phono stage. Sound Characteristics The airy and transparent sound produced by these vintage Siemens tubes has been unrivaled even to this day. The magically extended yet never tizzy highs, coupled with the slightly focused upper mid-range, deliver a clear presentation of the entire frequency spectrum, completed by the precise and deep controlled bass. And the most defining sound characteristic of Siemens E88CC tubes is their ability to retrieve the deepest levels of detail in sound, and these hidden sonic layers can go a long way to revealing the subtle ambient clues that help complete building a truly 3D holographic presentation. While as quiet and analytical as the best Telefunken E88CC tubes, Siemens E88CCs produce a warmer, smoother and more musical sound. To see how these two German titans in vintage tubes rival each other, feel free to see our full sound review of 60s Telefunken E88CC in this listing: https://www.ebay.com/itm/266252586987 Appearance & Cosmetic condition Beside the world-class sound characteristics, we treasure this pair because of their excellent cosmetic condition. Over 80% of the paint and lettering are still clear on these 60-year old tubes. The Munich date codes etched on the glass the glass are perfectly visible - A0 1# 4A (A0 = E88CC, # = Munich, 4 = 1964, A = January) and A0 1# 4G (A0 = E88CC, # = Munich, 4 = 1964, G = July), indicating they were made with only 6 months apart. 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: 12,500/12,700 Tube 2: 12,700/12,800 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 for 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.

1x E88CC Siemens - CCa Gold pin. Geprft mit Funke W19 : 11/11 mA

CCa E88CC E188CC 6922 SIEMENS HALSKE MUNICH GERMANY MATCHED QUAD 4 Pcs NOS Code: tubes A6 / 4G and A6 / 3I and A6 /4I and A6 / 4CO-getter,A-frame ,The chrome shieldMany e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rareEXTRA MATCHED QUAD !!! EXTRA RARE!!!This version with gold pins is professional and allows work of 10000 hours !!!!It is very difficult to pair 4 tubes and to keep each of them balanced. Before recording the characteristics, all CC tubes are aged for 72 hours in a specially made device and then tested and selected. For these 4 tubes it took over 50 tubes to select a that, you will admit it is very difficult. and theres no need to brag about those tubes - take a look on the net and everything will be clearwhy do I have to age them for 72 hours. Since I give the electrical characteristics of the tubes and for that to be correct, the CC tubes must be forced to work for at least 48 hours in order to equalize the working mode and only then the characteristics are recorded. the current Ia measured on that occasion does not have to be 16 mA and that is 100%, they can be higher and lower, within some limits - there are some on the NET, but it is important that the triodes in the balloon tubes CCa are as uniform as possible . And thats except Ia - mA quality which is primary for me and as a third reference, if I can, give the code .its nice to be harmonized due to the later exploitation of tubes-10000 hours.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc . Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% two tubes Ia = 15/14 mA and two tubes Ia = 15/15 mA

CCa E88CC E188CC 6922 SIEMENS HALSKE MUNICH GERMANY MATCHED PAIR 2 Pcs NOSEXTRA BALANCED !!! EXTRA MATCHED !!!NOS Siemens Halske CCa = E88CC 6922 Grey-Shield HOLY GRAILS 1963 and 1964ACID CODES :Code: A? 1? 3A and A? 1? 4E O-getter,one stage geter ,gray shield ,The gray shieldSTA do you think how many CCa tubes of this type needed to be measured to select this pair?MUCH MORE THAN YOU THINK !!! Probably no one in this world has a pair of CCs like this because there are NO more of them !!This version with gold pins is professional and allows work of 10000 hours !!!!It is very difficult to pair 4 tubes and to keep each of them balanced. Before recording the characteristics, all CC tubes are aged for 72 hours in a specially made device and then tested and selected. For these 2 tubes it took over 50 tubes to select a that, you will admit it is very difficult. and theres no need to brag about those tubes - take a look on the net and everything will be clearwhy do I have to age them for 72 hours. Since I give the electrical characteristics of the tubes and for that to be correct, the CC tubes must be forced to work for at least 48 hours in order to equalize the working mode and only then the characteristics are recorded. the current Ia measured on that occasion does not have to be 16 mA and that is 100%, they can be higher and lower, within some limits - there are some on the NET, but it is important that the triodes in the balloon tubes CCa are as uniform as possible . And thats except Ia - mA quality which is primary for me and as a third reference, if I can, give the code .its nice to be harmonized due to the later exploitation of tubes-10000 hours.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc . Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% tubes Ia = 20/19mA and Ia = 19/20 mA

Up for auction is one Very rare 1950S NOS Siemens D getter E88CC tube , Gray Shield , Golden pins .This tube is Germany made and is tested very strong and balance .Because of the old age , the printing are worn off much , see scan . it’s the famous E88CC / CCa version for audio . No original boxes . The tested value ( emission current ) : 18.2mA/18.9mA .The test condition : Va : 90 VDC , Vg : -1.2 VDC , Vf : 6.3 VDC , and Burn up around 10~15 minutes to stabilize for testing .For a new E88CC tube , the emission current is around 15mA/15mA . Please note : Buyer pay for the customs fees , taxes .. < Shipping > Buyer pay additional $15 USD for registered air-parcel worldwide . No insurance , if need insurance , please contact us to ask before bidding . Combine shipping is possible .

Up for auction is one pair Very rare 1950S NOS Siemens D getter E88CC tubes , This pair tubes are Germany made and have the Gray Shield , Golden pins .One tube is printed the Siemens logo but another one is printed the Telefunken logo .Although the printed logos are different , the structures of this pair tubes are the same . Because of the old age , the printing are worn off much , see scan . it’s the famous E88CC / CCa version for audio . No original boxes . The tubes tested strong and balance ,The tested value ( emission current ) : 17.1mA/15.5mA and 16.5mA/15.6mA .The test condition : Va : 90 VDC , Vg : -1.2 VDC , Vf : 6.3 VDC , and Burn up around 10~15 minutes to stabilize for testing .For a new E88CC tube , the emission current is around 15mA/15mA . Please note : Buyer pay for the customs fees , taxes .. < Shipping > Buyer pay additional $15 USD for registered air-parcel worldwide . No insurance , if need insurance , please contact us to ask before bidding . Combine shipping is possible .

Up for auction is one quad rare early 1960S Siemens NOS E88CC tubes , Germany made ,see scanThis four tubes have the Gray Shield , Golden pins , and the same etched code “ A?1?5A “ , also the same batch code 35 108 , it’s the famous E88CC / CCa version for audio . No original boxes . The tubes tested strong ,The tested value ( emission current ) :16.5mA/18.9mA , 17.9mA/16.6mA , 15.4mA/15.4mA and 15.0mA/16.8mA .The test condition : Va : 90 VDC , Vg : -1.2 VDC , Vf : 6.3 VDC , and Burn up around 10~15 minutes to stabilize for testing .For a new E88CC tube , the emission current is around 15mA/15mA . Please note : Buyer pay for the customs fees , taxes .. < Shipping > Buyer pay additional $15 USD for registered air- parcel worldwide . No insurance , if need insurance , please contact us to ask before bidding . Combine shipping is possible .

2 balanced old stock special edition siemens cca stereo tubes, rare premium e88cc/6922real legit cca (not relabels! be aware of fakes) grey plate warmth hifidelity transparent imagesnatural musical mid response superb for vocals instruments preamps tubemics stereos+vintage pair sought after pro collectibles! ships worldwide w/ siemens boxes well packed ~see our other siemens or telefunk listings for alternate listening position experiences~~cali acoustics~ ~stereos preamps mics vocals instruments hifi lofi bright warm vintage tone 6dj8/6922~~woo audio liquid platinum aesthetix cat audioresearch arc ear herron decco lector manley horizons rode mics blue mics echo conrad frontiers pathos vac and more~

Up for auction is one Very rare 1950S NOS Siemens D getter E88CC tube , Gray Shield , Golden pins .This tube is Germany made and is tested very strong and balance .Because of the old age , the printing are worn off much , see scan . it’s the famous E88CC / CCa version for audio . No original boxes . The tested value ( emission current ) : 18.2mA/18.9mA .The test condition : Va : 90 VDC , Vg : -1.2 VDC , Vf : 6.3 VDC , and Burn up around 10~15 minutes to stabilize for testing .For a new E88CC tube , the emission current is around 15mA/15mA . Please note : Buyer pay for the customs fees , taxes .. < Shipping > Buyer pay additional $15 USD for registered air-parcel worldwide . No insurance , if need insurance , please contact us to ask before bidding . Combine shipping is possible .

Up for auction is one pair Very rare 1950S NOS Siemens D getter E88CC tubes , This pair tubes are Germany made and have the Gray Shield , Golden pins .One tube is printed the Siemens logo but another one is printed the Telefunken logo .Although the printed logos are different , the structures of this pair tubes are the same . Because of the old age , the printing are worn off much , see scan . it’s the famous E88CC / CCa version for audio . No original boxes . The tubes tested strong and balance ,The tested value ( emission current ) : 17.1mA/15.5mA and 16.5mA/15.6mA .The test condition : Va : 90 VDC , Vg : -1.2 VDC , Vf : 6.3 VDC , and Burn up around 10~15 minutes to stabilize for testing .For a new E88CC tube , the emission current is around 15mA/15mA . Please note : Buyer pay for the customs fees , taxes .. < Shipping > Buyer pay additional $15 USD for registered air-parcel worldwide . No insurance , if need insurance , please contact us to ask before bidding . Combine shipping is possible .

Up for auction is one quad rare early 1960S Siemens NOS E88CC tubes , Germany made ,see scanThis four tubes have the Gray Shield , Golden pins , and the same etched code “ A?1?5A “ , also the same batch code 35 108 , it’s the famous E88CC / CCa version for audio . No original boxes . The tubes tested strong ,The tested value ( emission current ) :16.5mA/18.9mA , 17.9mA/16.6mA , 15.4mA/15.4mA and 15.0mA/16.8mA .The test condition : Va : 90 VDC , Vg : -1.2 VDC , Vf : 6.3 VDC , and Burn up around 10~15 minutes to stabilize for testing .For a new E88CC tube , the emission current is around 15mA/15mA . Please note : Buyer pay for the customs fees , taxes .. < Shipping > Buyer pay additional $15 USD for registered air- parcel worldwide . No insurance , if need insurance , please contact us to ask before bidding . Combine shipping is possible .

CCa E88CC E188CC 6922 SIEMENS HALSKE MUNICH GERMANY MATCHED PAIR 2 Pcs NOSEXTRA BALANCED !!! EXTRA MATCHED !!!NOS Siemens Halske CCa = E88CC 6922 Grey-Shield HOLY GRAILS 1963 and 1964ACID CODES :Code: A? 1? 3A and A? 1? 4E O-getter,one stage geter ,gray shield ,The gray shieldSTA do you think how many CCa tubes of this type needed to be measured to select this pair?MUCH MORE THAN YOU THINK !!! Probably no one in this world has a pair of CCs like this because there are NO more of them !!This version with gold pins is professional and allows work of 10000 hours !!!!It is very difficult to pair 4 tubes and to keep each of them balanced. Before recording the characteristics, all CC tubes are aged for 72 hours in a specially made device and then tested and selected. For these 2 tubes it took over 50 tubes to select a that, you will admit it is very difficult. and theres no need to brag about those tubes - take a look on the net and everything will be clearwhy do I have to age them for 72 hours. Since I give the electrical characteristics of the tubes and for that to be correct, the CC tubes must be forced to work for at least 48 hours in order to equalize the working mode and only then the characteristics are recorded. the current Ia measured on that occasion does not have to be 16 mA and that is 100%, they can be higher and lower, within some limits - there are some on the NET, but it is important that the triodes in the balloon tubes CCa are as uniform as possible . And thats except Ia - mA quality which is primary for me and as a third reference, if I can, give the code .its nice to be harmonized due to the later exploitation of tubes-10000 hours.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc . Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% tubes Ia = 20/19mA and Ia = 19/20 mA

CCa E88CC E188CC 6922 SIEMENS HALSKE MUNICH GERMANY MATCHED QUAD 4 Pcs NOS Code: tubes A6 / 4G and A6 / 3I and A6 /4I and A6 / 4CO-getter,A-frame ,The chrome shieldMany e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rareEXTRA MATCHED QUAD !!! EXTRA RARE!!!This version with gold pins is professional and allows work of 10000 hours !!!!It is very difficult to pair 4 tubes and to keep each of them balanced. Before recording the characteristics, all CC tubes are aged for 72 hours in a specially made device and then tested and selected. For these 4 tubes it took over 50 tubes to select a that, you will admit it is very difficult. and theres no need to brag about those tubes - take a look on the net and everything will be clearwhy do I have to age them for 72 hours. Since I give the electrical characteristics of the tubes and for that to be correct, the CC tubes must be forced to work for at least 48 hours in order to equalize the working mode and only then the characteristics are recorded. the current Ia measured on that occasion does not have to be 16 mA and that is 100%, they can be higher and lower, within some limits - there are some on the NET, but it is important that the triodes in the balloon tubes CCa are as uniform as possible . And thats except Ia - mA quality which is primary for me and as a third reference, if I can, give the code .its nice to be harmonized due to the later exploitation of tubes-10000 hours.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc . Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% two tubes Ia = 15/14 mA and two tubes Ia = 15/15 mA

Tested Tedted with my calibratedFunke W19s 12/12mA good start @6.5/6.5mA working guaranteeCombine Shipping worldwide flat rate shipping 22-36$ fast priority shippingcombine up to 20 Noval or 8 Octal Tubes Payment must be received within 2 days of auctions end, unless other arrangements have been made. Item will be shipped within 3 business days of receipt of payment. Make sure that your Phonenumber is in your Adress you have provided on Ebay. I Need the Number for your Post Service Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. all Items are shipped from Switzerland we send only with Trackingnumber, no low budget shipping Item is guaranteed to be as described. Please free feel to eMail me with your questions before bidding. If in doubt, ask! Remember, if you bid and win, you are under contract to pay for this item. Finally, I reserve the right to reject bids from people with excessive negative feedback, a history of non-payment, or any other reason that suggests that you are not bidding in good faith. that additional VAT of your country can arise _gsrx_vers_1516 (GS 9.3 (1516))

CCa E88CC E188CC 6922 SIEMENS HALSKE MUNICH GERMANY MATCHED PAIR 2 Pcs NOSEXTRA BALANCED !!! EXTRA MATCHED !!!NOS Siemens Halske CCa = E88CC 6922 Grey-Shield HOLY GRAILS 1963 and 1964ACID CODES :Code: A? 1? 3A and A? 1? 4E O-getter,one stage geter ,gray shield ,The gray shieldSTA do you think how many CCa tubes of this type needed to be measured to select this pair?MUCH MORE THAN YOU THINK !!! Probably no one in this world has a pair of CCs like this because there are NO more of them !!This version with gold pins is professional and allows work of 10000 hours !!!!It is very difficult to pair 4 tubes and to keep each of them balanced. Before recording the characteristics, all CC tubes are aged for 72 hours in a specially made device and then tested and selected. For these 2 tubes it took over 50 tubes to select a that, you will admit it is very difficult. and theres no need to brag about those tubes - take a look on the net and everything will be clearwhy do I have to age them for 72 hours. Since I give the electrical characteristics of the tubes and for that to be correct, the CC tubes must be forced to work for at least 48 hours in order to equalize the working mode and only then the characteristics are recorded. the current Ia measured on that occasion does not have to be 16 mA and that is 100%, they can be higher and lower, within some limits - there are some on the NET, but it is important that the triodes in the balloon tubes CCa are as uniform as possible . And thats except Ia - mA quality which is primary for me and as a third reference, if I can, give the code .its nice to be harmonized due to the later exploitation of tubes-10000 hours.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc . Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% tubes Ia = 20/19mA and Ia = 19/20 mA

CCa E88CC E188CC 6922 SIEMENS HALSKE MUNICH GERMANY MATCHED QUAD 4 Pcs NOS Code: tubes A6 / 4G and A6 / 3I and A6 /4I and A6 / 4CO-getter,A-frame ,The chrome shieldMany e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rareEXTRA MATCHED QUAD !!! EXTRA RARE!!!This version with gold pins is professional and allows work of 10000 hours !!!!It is very difficult to pair 4 tubes and to keep each of them balanced. Before recording the characteristics, all CC tubes are aged for 72 hours in a specially made device and then tested and selected. For these 4 tubes it took over 50 tubes to select a that, you will admit it is very difficult. and theres no need to brag about those tubes - take a look on the net and everything will be clearwhy do I have to age them for 72 hours. Since I give the electrical characteristics of the tubes and for that to be correct, the CC tubes must be forced to work for at least 48 hours in order to equalize the working mode and only then the characteristics are recorded. the current Ia measured on that occasion does not have to be 16 mA and that is 100%, they can be higher and lower, within some limits - there are some on the NET, but it is important that the triodes in the balloon tubes CCa are as uniform as possible . And thats except Ia - mA quality which is primary for me and as a third reference, if I can, give the code .its nice to be harmonized due to the later exploitation of tubes-10000 hours.They are also tested for gas, short and leakageNote: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc . Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100% two tubes Ia = 15/14 mA and two tubes Ia = 15/15 mA