3x MONITOR 12AX7/ECC83 Valves Made in Holland Tested by AVO VCM Tester Valve 1 Ia1 = 0.9(mA), gm1 = 1.4(mA/V) Ia2 = 0.95(mA), gm2 = 1.45(mA/V) Valve 2 Ia1 = 0.98(mA), gm1 = 1.55(mA/V) Ia2 = 0.93(mA), gm2 = 1.5(mA/V) Valve 3 Ia1 = 1.2(mA), gm1 = 1.5(mA/V) Ia2 = 1.38(mA), gm2 = 1.6(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. 20220412L005

1x LORENZ/Holland ECC83 Valve Date Code: *** ?1G1 Rare dimple disc version manufactured in Holland, great sounding ECC83. Tested by AVO VCM Tester Ia1 = 1.2(mA), gm1 = 1.75(mA/V) Ia2 = 1.15(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. 20220828L009

MULLARD 12AX7 CV492 ECC83 VALVE TUBE BRITISH GOOD QUALITY

***** RARE NOS Condition!! ***** ** PERFECT BALANCED Plates!! ** *** Tested NEW NOS!! *** 1962 Mullard British Military TubeBlackburn Factory (code i61 B2I1)CV492 KB/DA 12AX7 ECC83 SHORT Ribbed Grey PLATES O Getter Tube BOGEN AMP Tested - No microphonics TV-7/u Tested Condition Report: ** Tubes TESTED AND sounded good in my BOGEM AMP! No microphonics! ** ** I WILL COMBINE SHIPPING COST ON M Tested to be in guaranteed working conditionI tested these on a High Quality Professonal Hickok TV-7/U Tester:TUBEs TEST RESULTs: Tube: 50/50 - {Minimum Rating of 32/32 for TV-7 Testers are equal to 65% of average new ratings.} If you have Questions or Comments contact me on eBay Check out the photos! TESTED WITH a (TV-7/U) FOR GAS, SHORTS, AND MUTUAL CONDUCTANCE AND ARE MOSTLY STRONG TUBES! I Combine Y ITEMS!!! ** ShippingBefore You Pay. I accept PayPal and Postal M O.Please see click to enlarge photos for condition and quality.Check out My Other Items For Sale!WILL BE SHIPPED OUT FAST! Before bidding please read my shipping and return policy. I WILL COMBINE SHIPPING COST ON MY ITEMS!!! NOTE: International buyers - THE BUYER IS RESPONSIBLE FOR SHIPPING FEES. INTERNATIONAL BIDS WELCOME. I WONT CHANGE DECLARED VALUE ON CUSTOM FORMS AND INTERNATIONAL BUYERS ARE RESPONSIBLE FOR ALL TAXES, CUSTOM FEES, and additional shipping fees. ANY RETURN WILL BE ACCEPTED BUT BUYER WILL PAY SHIPPING FEES AND I WILL NOT REFUND ANY SHIPPING FEES.*TESTED ON Calibrated HICKOK TV-7 B/U*{Minimum Ratings for TV-7 Testers are equal to 65% of average new ratings.}ALL tubes will be ran through a Daniel Nelson calibrated HICKOK TV-7 B/U for a full mutual conductance test. This is a world class tester that is calibrated by the Hickok doctor. Its test results are dead on and you can buy with confidence. If you want to know what the exact Gm rating of the tube is please message me. My Return Policy: Will not accept returns for reasons such as ordered the wrong item, change mind, not what I thought It was, wrong color ordered, item ordered.

9Pin Vakuum RöHren Buchse Testen Saver für 6DJ8 12AX7 ECC83 B339 CV492 6L13 C1T4 Brandneuer B9A 9-poliger RöhrentestsparerGesamthöhe ca.: 27mmModell: -9-G, vergoldete FüßeMaterial: BakelitFarbe: SchwarzVerpackungsinhalt:5 * B9A 9-poliger Röhrentest-Sparer

9Pin Vakuum RöHren Buchse Testen Saver für 6DJ8 12AX7 ECC83 B339 CV492 6L13 E1T9 Brandneuer B9A 9-poliger RöhrentestsparerGesamthöhe ca.: 27mmModell: -9-G, vergoldete FüßeMaterial: BakelitFarbe: SchwarzVerpackungsinhalt:5 * B9A 9-poliger Röhrentest-Sparer

CV492 (ECC83 12AX7) aerospace quality ex aircraft valve made by Mullard code KB/DA. Tested good for voltage gain = 500 (54dB) HT 200v Ra 220K Rk 1K Ia 0.5mA Heater/K > 20M ohms Auction is for 1 off valve More than one available

MULLARD ECC83 12AX7 CV492 type F91 Valve Pair 1958 Long Plate Blackburn production matched “goal post” (getter support) Special military select quality CV492. Excellent condition — report below. Gave a full-bodied bathing of music in my RIAA Phono stage (notably bigger sound, richer and more musical than late 1970’s / 80’s production Mullards) which I no longer use, so these valves are surplus to requirements. A rare pair of classic valves in production for less than 18 months in the late 1950s. Manufactured from late 1957 until early 1959 only. The F91 design was the Mullard long plate ecc83 that immediately followed their square getter MC1. Similar to, and all the quality of the predecessor legendary MC1 valve. Some prefer the F91 for its slightly smoother upper-mid frequency range. The F91 is the only Mullard design using a halo getter which incorporates the double goalpost getter support as used in the MC1. 17mm long plates” much rarer than the later 13mm short plates. Copper plate posts. CV492 print on reverse means these were selected for high specification; the best of the Blackburn F91 production. Design and date codes: F91 B8E, &: F91 B8G manufactured at Mullard Blackburn factory in May, and July, 1958. Tested good for shorts; continuity; microphony; and emissions. No hiss, no hum, no noise, no microphonics. Condition report September 2021 and stored since (from Deco Audio specialist (aylesbury), can provide details): A: triode 1, gain 35.0db, output 45v triode 2, gain 35.2db, output 45v B: triode 1, gain 35.0db, output 45v triode 2, gain 36.0db, output 45v Advice: “book values for our machine are 35db and 50v, however given the consistency across all four triodes I suspect it is my judgement of clipping (output voltage) that is off (this is done audibly and visually and there is a tolerance within which I think this falls), so in other words they are very close if not meeting tolerance and about as close to matched halves as can reasonably be expected, with A being the best”. Only the item listed is included in this sale. I will pack carefully for safe, insured, transit. Will be sent UK Post Office First Class Signed For . (Packed Item Weight not more than 250 grams) Please contact me first if bidding from overseas to find courier service and cost. All import / other duties will be the responsibility of the purchaser. Thank you for your interest.

CV492 (ECC83 12AX7) aerospace quality ex aircraft valve made by Brimar code KB/AD. Tested good for voltage gain = 500 (54dB) HT 200v Ra 220K Rk 1K Ia 0.5mA Heater/K > 20M ohms Auction is for 1 off valve More than one available

CV492 (ECC83 12AX7) aerospace quality ex aircraft valve made by STC code KB/FD. Tested good for voltage gain = 500 (54dB) HT 200v Ra 220K Rk 1K Ia 0.5mA Heater/K > 20M ohms Auction is for 1 off valve More than one available

4x BRIMAR 12AX7 Valves Date Code: 3H52162, 3H52162, 2G6/21**, 2G4/2162 Tested by AVO VCM Tester Valve 1 Ia1 = 1.52(mA), gm1 = 1.75(mA/V) Ia2 = 1.35(mA), gm2 = 1.75(mA/V) Valve 2 Ia1 = 1.55(mA), gm1 = 1.75(mA/V) Ia2 = 1.5(mA), gm2 = 1.7(mA/V) Valve 3 Ia1 = 1.43(mA), gm1 = 1.73(mA/V) Ia2 = 1.23(mA), gm2 = 1.63(mA/V) Valve 4 Ia1 = 1.18(mA), gm1 = 1.45(mA/V) Ia2 = 1.25(mA), gm2 = 1.6(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. 20230522L011

***** RARE NOS Condition!! ***** ** PERFECT BALANCED Plates!! ** *** Tested NEW NOS!! *** 1962 Mullard British Military TubeBlackburn Factory (code i61 B2I1)CV492 KB/DA 12AX7 ECC83 SHORT Ribbed Grey PLATES O Getter Tube BOGEN AMP Tested - No microphonics TV-7/u Tested Condition Report: ** Tubes TESTED AND sounded good in my BOGEM AMP! No microphonics! ** ** I WILL COMBINE SHIPPING COST ON M Tested to be in guaranteed working conditionI tested these on a High Quality Professonal Hickok TV-7/U Tester:TUBEs TEST RESULTs: Tube: 50/50 - {Minimum Rating of 32/32 for TV-7 Testers are equal to 65% of average new ratings.} If you have Questions or Comments contact me on eBay Check out the photos! TESTED WITH a (TV-7/U) FOR GAS, SHORTS, AND MUTUAL CONDUCTANCE AND ARE MOSTLY STRONG TUBES! I Combine Y ITEMS!!! ** ShippingBefore You Pay. I accept PayPal and Postal M O.Please see click to enlarge photos for condition and quality.Check out My Other Items For Sale!WILL BE SHIPPED OUT FAST! Before bidding please read my shipping and return policy. I WILL COMBINE SHIPPING COST ON MY ITEMS!!! NOTE: International buyers - THE BUYER IS RESPONSIBLE FOR SHIPPING FEES. INTERNATIONAL BIDS WELCOME. I WONT CHANGE DECLARED VALUE ON CUSTOM FORMS AND INTERNATIONAL BUYERS ARE RESPONSIBLE FOR ALL TAXES, CUSTOM FEES, and additional shipping fees. ANY RETURN WILL BE ACCEPTED BUT BUYER WILL PAY SHIPPING FEES AND I WILL NOT REFUND ANY SHIPPING FEES.*TESTED ON Calibrated HICKOK TV-7 B/U*{Minimum Ratings for TV-7 Testers are equal to 65% of average new ratings.}ALL tubes will be ran through a Daniel Nelson calibrated HICKOK TV-7 B/U for a full mutual conductance test. This is a world class tester that is calibrated by the Hickok doctor. Its test results are dead on and you can buy with confidence. If you want to know what the exact Gm rating of the tube is please message me. My Return Policy: Will not accept returns for reasons such as ordered the wrong item, change mind, not what I thought It was, wrong color ordered, item ordered.

CV492 12AX7 ECC83 SHORT LADDER PLATE, RING GETTER 2 x PIECES UNKNOWN BRAND, CAN JUST MAKE OUT 12AX7 ON THE BACK PULLED FROM DECOMMISSIONED TEST EQUIPEMENT UNABLE TO TEST AS I DO NOT HAVE A TESTER SELLING AS UNTESTED WITH NO RETURNS FEEL FREE TO ASK ANY QUESTIONS PLEASE VIEW MY OTHER VALVES FOR SALE.

VERY RARE PAIR OF BRIMAR 12AX7 CV492 LONG PLATES SQUARE GETTER 3B6 AND 2G6 CODES FROM FEBRUARY AND JULY 1956 NICE PAIR ??AVO VCM163 TESTED READINGS TUBE 1 - Ia 1.0/1.1 gm 1.75/1.9 TUBE 2 - Ia 1.0/1.0 gm 1.6/1.5 100% = Ia 1.2 gm 1.6 ? PLEASE SEE MY OTHER AUCTIONS ?

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

CV492 (ECC83 12AX7) aerospace quality ex aircraft valve made by Mullard code KB/DA. Tested good for voltage gain = 500 (54dB) HT 200v Ra 220K Rk 1K Ia 0.5mA Heater/K > 20M ohms Auction is for 1 off valve More than one available

CV492 (ECC83 12AX7) aerospace quality ex aircraft valve made by Brimar code KB/AD. Tested good for voltage gain = 500 (54dB) HT 200v Ra 220K Rk 1K Ia 0.5mA Heater/K > 20M ohms Auction is for 1 off valve More than one available

1x Mullard ECC83 Valve Date Code: ?3 mCA (1953) Very rare ECC83 from Copenhagen factory with long welded plate and D-getter Tested by AVO VCM Tester Ia1 = 1.2(mA), gm1 = 1.45(mA/V) Ia2 = 0.9(mA), gm2 = 1.3(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. 20230522L006

***** RARE NOS Condition!! ***** ** PERFECT BALANCED Plates!! ** *** Tested NEW NOS!! *** 1962 Mullard British Military TubeBlackburn Factory (code i61 B2I1)CV492 KB/DA 12AX7 ECC83 SHORT Ribbed Grey PLATES O Getter Tube BOGEN AMP Tested - No microphonics TV-7/u Tested Condition Report: ** Tubes TESTED AND sounded good in my BOGEM AMP! No microphonics! ** ** I WILL COMBINE SHIPPING COST ON M Tested to be in guaranteed working conditionI tested these on a High Quality Professonal Hickok TV-7/U Tester:TUBEs TEST RESULTs: Tube: 50/50 - {Minimum Rating of 32/32 for TV-7 Testers are equal to 65% of average new ratings.} If you have Questions or Comments contact me on eBay Check out the photos! TESTED WITH a (TV-7/U) FOR GAS, SHORTS, AND MUTUAL CONDUCTANCE AND ARE MOSTLY STRONG TUBES! I Combine Y ITEMS!!! ** ShippingBefore You Pay. I accept PayPal and Postal M O.Please see click to enlarge photos for condition and quality.Check out My Other Items For Sale!WILL BE SHIPPED OUT FAST! Before bidding please read my shipping and return policy. I WILL COMBINE SHIPPING COST ON MY ITEMS!!! NOTE: International buyers - THE BUYER IS RESPONSIBLE FOR SHIPPING FEES. INTERNATIONAL BIDS WELCOME. I WONT CHANGE DECLARED VALUE ON CUSTOM FORMS AND INTERNATIONAL BUYERS ARE RESPONSIBLE FOR ALL TAXES, CUSTOM FEES, and additional shipping fees. ANY RETURN WILL BE ACCEPTED BUT BUYER WILL PAY SHIPPING FEES AND I WILL NOT REFUND ANY SHIPPING FEES.*TESTED ON Calibrated HICKOK TV-7 B/U*{Minimum Ratings for TV-7 Testers are equal to 65% of average new ratings.}ALL tubes will be ran through a Daniel Nelson calibrated HICKOK TV-7 B/U for a full mutual conductance test. This is a world class tester that is calibrated by the Hickok doctor. Its test results are dead on and you can buy with confidence. If you want to know what the exact Gm rating of the tube is please message me. My Return Policy: Will not accept returns for reasons such as ordered the wrong item, change mind, not what I thought It was, wrong color ordered, item ordered.

***** RARE NOS Condition!! ***** ** PERFECT BALANCED Plates!! ** *** Tested NEW NOS!! *** 1962 Mullard British Military TubeBlackburn Factory (code i61 B2I1)CV492 KB/DA 12AX7 ECC83 SHORT Ribbed Grey PLATES O Getter Tube BOGEN AMP Tested - No microphonics TV-7/u Tested Condition Report: ** Tubes TESTED AND sounded good in my BOGEM AMP! No microphonics! ** ** I WILL COMBINE SHIPPING COST ON M Tested to be in guaranteed working conditionI tested these on a High Quality Professonal Hickok TV-7/U Tester:TUBEs TEST RESULTs: Tube: 50/50 - {Minimum Rating of 32/32 for TV-7 Testers are equal to 65% of average new ratings.} If you have Questions or Comments contact me on eBay Check out the photos! TESTED WITH a (TV-7/U) FOR GAS, SHORTS, AND MUTUAL CONDUCTANCE AND ARE MOSTLY STRONG TUBES! I Combine Y ITEMS!!! ** ShippingBefore You Pay. I accept PayPal and Postal M O.Please see click to enlarge photos for condition and quality.Check out My Other Items For Sale!WILL BE SHIPPED OUT FAST! Before bidding please read my shipping and return policy. I WILL COMBINE SHIPPING COST ON MY ITEMS!!! NOTE: International buyers - THE BUYER IS RESPONSIBLE FOR SHIPPING FEES. INTERNATIONAL BIDS WELCOME. I WONT CHANGE DECLARED VALUE ON CUSTOM FORMS AND INTERNATIONAL BUYERS ARE RESPONSIBLE FOR ALL TAXES, CUSTOM FEES, and additional shipping fees. ANY RETURN WILL BE ACCEPTED BUT BUYER WILL PAY SHIPPING FEES AND I WILL NOT REFUND ANY SHIPPING FEES.*TESTED ON Calibrated HICKOK TV-7 B/U*{Minimum Ratings for TV-7 Testers are equal to 65% of average new ratings.}ALL tubes will be ran through a Daniel Nelson calibrated HICKOK TV-7 B/U for a full mutual conductance test. This is a world class tester that is calibrated by the Hickok doctor. Its test results are dead on and you can buy with confidence. If you want to know what the exact Gm rating of the tube is please message me. My Return Policy: Will not accept returns for reasons such as ordered the wrong item, change mind, not what I thought It was, wrong color ordered, item ordered.

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