Mullard ECC83, long plate, square getter. Date code mc1 B7B. Nice clean condition and tests strong; 1.5ma / 1.6ma (125% / 133%)

Mullard ECC83 (4004 - M8137) Square Getter - Long plate. 1950’s Mullard made in Great Britain ECC83/12AX7 valves / tubes Made at the Mullard Blackburn factory long grey 17mm plates with square getter dual support rods blackburn eia/date codes of B6J MC1 Tested on a Senicore 143 NO GAS NO LEAKAGE NO SHORTS The minimum ‘Good’ for this type is 70 with average new being 90 Tests @ 79

Up for sale is a Mullard 12AX7 ECC83 Tube.Constructed with long gray plates, top dual supported square getter, & copper grid posts. Date code = mC1/B7ITested on our calibrated TV-7A/U at 44/44 where 32/32 is the minimum. Free domestic shipping included.

1x Mullard CV492 Valve Very rare Mullard CV492/ECC83 with long plate and []-getter, new in original box Date Code: mC1 B6H (1956) Tested by AVO VCM Tester Ia1 = 1.58(mA), gm1 = 1.9(mA/V) Ia2 = 1.43(mA), gm2 = 1.7(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20230522L020

2x Mullard ECC83 Valves Very rare pair of Mullard ECC83 manufactured in 1955 with long-plate and []-getter Date Code: mC1 B5F, mC1 B5F Tested by AVO VCM Tester Valve 1 Ia1 = 1.32(mA), gm1 = 1.55(mA/V) Ia2 = 1.45(mA), gm2 = 1.4(mA/V) Valve 2 Ia1 = 1.23(mA), gm1 = 1.5(mA/V) Ia2 = 1.48(mA), gm2 = 1.45(mA/V) NOS specification: Ia = 1.2(mA), gm = 1.6(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20230522L001

2 Mullard Pair 12AX7 ECC83 MC1 + Box Preamp Audio Amp Vacuum Tube TESTED HICKOK 2 Mullard (1 Pair) 12AX7 ECC83 Made at the Mullard Blackburn FactoryIn Original Box Preamp Audio Amp Vacuum Tube Both Stamped -- MC1 B6HTESTED HICKOKTube #1 Made by Mullard.   Triode 1 Gm= 1500; Triode 2 Gm= 1450.  Tube #2  Made by Mullard.  Triode 1 Gm= 1500; Triode 2 Gm= 1420.Tubes are tested on a Hickok 600A Mutual Conductance Tube Tester and GUARANTEED WORKING.Photos are of actual item offered Listing and template services provided by inkFrog

3 vintage 1957 Mullard square getter long plate 12AX7 ecc83 tubes -tested- mC1 Click image to enlarge Description 3 1957 Mullard made in Great Britain ecc83/12ax7 tubes made at the mullard blackburn factory long grey 17mm plates with square getter and dual support rods  matching blackburn eia/date codes of B7H mC1  tested on my Amplitrex AT-1000 mutual conductance tester no gas, shorts or hk leakage the minimum for this type is 1000 with average new being 1600 tested @  1600/1500 1500/1500 1400/1500   Pictures sell! Auctiva offers Free Image Hosting and Editing.300+ Listing Templates! Auctiva gets you noticed! The complete eBay Selling Solution. Track Page Views WithAuctivas Counter

SUPER RARE EARLY MULLARD ECC83 12AX7 LONG PLATES SQUARE GETTER WITH CODE mC1 B7K - BLACKBURN NOVEMBER 1957 IN BEAUTIFUL CONDITION TESTED STRONG ??AVO VCM163 TESTED READINGS TUBE 1 - Ia 1.7/1.4 gm 1.7/1.5 100% = Ia 1.2 gm 1.6 ? PLEASE SEE MY OTHER AUCTIONS ?

Please DO NOT pay until an eBay invoice is sent to you - thank you. Please DO NOT bid if you have less then 15 feedback ! Please DO NOT ask me to falsify shipping declaration .... Buy from a seller with 23 years on eBay with 100% feedback :-) For your consideration I have a superb highly prized ( mc1 ) Mullard 12AX7 triode valves that test well with match date codes and long 17mm plates :-) and goal post getters - superb for your vintage mono blocks or stereo amplifier - if you want your amp to sing then these are must :-) my photos show good detail - good luck. Tube 1 = 1.6/1.4gm Tube 2 = 1.3/1.4gm AVO MK4 new average = 1.6/1.6gm Please read my recent 100% feedback and consider my photos as a reasonable and good representation of the item being auctioned - I pride myself with good packing ( no charge ) and with some goods I double box for safe arrival, pick up is always welcomed - if you have ANY questions please ask before bidding. Yes we combine shipping/postage on all our listings and ALL goods will be sent REGISTERED/TRACKED by Australia Post ( $3/registered/signature cost for Aussie customers ) in Australia. Shipping Internationally by Australia Post, this gives Tracking and or Signature on arrival and is a very good safe and reliable service I have used for 40 years :-) ** Please note : All electrical goods must be inspected/checked by a licenced electrical technician before any voltage is applied.

Legendary Mullard Blackburn Ecc83/12AX7 mc1 Long Plate code B6C.Rare in his original box. Tested with good emission. Triode value: 1.6/1.7ma Gm 1500/1500 Foto reali dell'oggetto in vendita

Nos testing Siemens & halske ecc83. Matching etched codes - MC1 ? 7G balanced / matched 1: Gm 1888 / 1920 ma/V (NOS range on this tester is 1600 to 1900) Gain 98.8 / 97.4 Mu ( the gain range for ecc83 is 90 to 100) #2 Gm 1900 / 1950 Gain 100/102.3 Also tested in a dac and preamplifier . All good and they sound very nice indeed. Better sounding than mullard mc1 in my experience. Extremely rare. uk only

For sale is a nice early example of the Mullard ECC83 with long anode plates and square getter. This example has fairly good print with all writing still legible and only minor rubbing. Coded MC1 and B7B, this valve was manufactured in the Mullard Blackburn factory in February 1957. This valve has been AVO tested on a recently calibrated VCM Mk4, a very close match between the two triode sections with the following results: A1: 0.8mA - 1.2mA/V A2:0.75mA - 1.2mA/V I have also listened to this valve on a setup which amplifies the ECC83 sections by 400x, this allows me to listen deep within the valve for any noises that could get worse and make themselves apparent later in use. This valve is free from any noise and sounds excellent. Overall a used but great working example of this early Mullard ECC83. Item will be well packaged for postage, offers are welcome.

Nos testing Siemens & halske ecc83. Matching etched codes - MC1 ? 7G balanced / matched 1: Gm 1888 / 1920 ma/V (NOS range on this tester is 1600 to 1900) Gain 98.8 / 97.4 Mu ( the gain range for ecc83 is 90 to 100) #2 Gm 1900 / 1950 Gain 100/102.3 Also tested in a dac and preamplifier . All good and they sound very nice indeed. Better sounding than mullard mc1 in my experience. Extremely rare. uk only

Accepted, along with all eBay approved payment methods. - Payment required within (3) days of purchase or auction close.ReturnsNo return offered for this listing. Shipping Item usually ships within (3) business days of cleared payment. Note: This item may be eligible for international shipping either directly or through the eBay Global Shipping Program. If you are a buyer from outside of the US please contact me for additional details.Sales TaxeBay now automatically collects sales tax for all shipped transactions. If you are picking up your purchase from us in NYC, 8.875% local sales tax will be charged

Nos testing Siemens & halske ecc83. Matching etched codes - MC1 ? 7G balanced / matched 1: Gm 1888 / 1920 ma/V (NOS range on this tester is 1600 to 1900) Gain 98.8 / 97.4 Mu ( the gain range for ecc83 is 90 to 100) #2 Gm 1900 / 1950 Gain 100/102.3 Also tested in a dac and preamplifier . All good and they sound very nice indeed. Better sounding than mullard mc1 in my experience. Extremely rare. uk only

I have 1 excellent 1957 MC1 Mullard square getter 12ax7 tubes.This tube test 39-40 where 32 is the minimum good and new tubes test 48 to 50 on are tv7 tube tester.

D 3 Used Mullard 12AX7 / ECC83 mC1 Long Plate Square Getter Tubes Tubes have been used, all test somewhat low. Tubes test at 800 Gm/800 Gm, 700 Gm/700 Gm, and 800 Gm/900 Gm on Mercury 2000 tester, with 1000 the rated Gm. Does not include boxes. Please note: Different brands, models, and even the same brand and same model of tube tester will give different readings. The tube test reading given are to be taken as an approximate value to give a general idea of the tubes condition. Your test results may differ. I am not trying to deceive anybody; it is the limitations of using test equipment that is often over 40 years old and had varying levels of quality and performance even when new. Codes: mC1 B7A, mC1 B7B, mC1 B7D Made In: Great Britain More tubes in my other auctions. . Shipping: Tubes will be shipped with USPS. Please use the shipping calculator for shipping costs. I am happy to combine shipping on multiple purchases. Please wait before paying and I will send an invoice with combined shipping costs. Free local pickup is available for all items. Payment: I will accept PayPal, contact me for other payment methods.

2 X Mullard Ecc83 Mc1. 2 mullard ecc83 valves as described below. mullard mc1 12ax7 / ecc83 / cv492 cv492 = military version of ecc83 = specially selected ecc83 Blackburn 1955 long plate Goal post square getter MC1 B5F IA 1.5 / 1.6 and GM 1.7 / 1.8 125%/133% and 106%/113% (new = 1.2 and 1.6) uk only please. mullard mc1 12ax7 / ecc83 / cv492 cv492 = military version of ecc83 = specially selected ecc83 Blackburn 1956 long plate Goal post square getter MC1 B6J IA 1.35 / 1.5 and GM 1.5 / 1.65 113%/125% and 94%/103% (new = 1.2 and 1.6) uk only please Sent from Yahoo Mail on Android

mullard mc1 12ax7 / ecc83 / cv492 cv492 = military version of ecc83 = specially selected ecc83 Blackburn 1956 long plate Goal post square getter MC1 B6J IA 1.35 / 1.5 and GM 1.5 / 1.65 113%/125% and 94%/103% (new = 1.2 and 1.6)uk only please

mullard mc1 12ax7 / ecc83 / cv492 cv492 = military version of ecc83 = specially selected ecc83 Blackburn 1955 long plate Goal post square getter MC1 B5F IA 1.5 / 1.6 and GM 1.7 / 1.8 125%/133% and 106%/113% (new = 1.2 and 1.6) uk only please

For sale is a nice early example of the Mullard ECC83 with long anode plates and square getter. This example has fairly good print with all writing still legible and only minor rubbing. Coded MC1 and B7B, this valve was manufactured in the Mullard Blackburn factory in February 1957. This valve has been AVO tested on a recently calibrated VCM Mk4, a very close match between the two triode sections with the following results: A1: 0.8mA - 1.2mA/V A2:0.75mA - 1.2mA/V I have also listened to this valve on a setup which amplifies the ECC83 sections by 400x, this allows me to listen deep within the valve for any noises that could get worse and make themselves apparent later in use. This valve is free from any noise and sounds excellent. Overall a used but great working example of this early Mullard ECC83. Item will be well packaged for postage, offers are welcome.

Pair of Mullard Blackburn Long Plate Square Getter Valves/Tubes Tested on Hickok TV7-D/U Tester Tube 1) mC1 B6C Blackburn March 1956 CV492 KB/DA Tested 40 / 44 (80% / 88%) Tube 2) f91 B7K Blackburn August 1957 Tested 40 / 42 (80% / 84%) On Hickok TV7-D/U Tester min is 32 (65%) Worldwide Shipping Cost & US $25

Nos testing Siemens & halske ecc83. Matching etched codes - MC1 ? 7G balanced / matched 1: Gm 1888 / 1920 ma/V (NOS range on this tester is 1600 to 1900) Gain 98.8 / 97.4 Mu ( the gain range for ecc83 is 90 to 100) #2 Gm 1900 / 1950 Gain 100/102.3 Also tested in a dac and preamplifier . All good and they sound very nice indeed. Better sounding than mullard mc1 in my experience. Extremely rare. uk only