Got these tubes with several others in a lot that were clearly New Old Stock and appear to have never been installed! All 4 of these tubes feature the same top “Gf8″ code and the bottom codes are Delta8xx / Delta9xx which indicates they are from 1968/69 and manufactured by Philips. In this particular case they were branded for Honeywell. This set tests as NOS+ and is nicely balanced! Also the print is Extremely fragile and will easily rub off, much has already rubbed off, but special care was taken not to rub off any more while testing. The tubes’ test results are displayed in the photos New 12AU7 Spec 100% = 2,2. See the photos for physical / cosmetic condition. Notes Regarding Tube Tests. All tubes are tested on an Amplitrex AT-1000 tester in the automatic Fixed Bias Mode (for the most conservative results). Test Results are for a general reference only, and are not a guarantee of performance, nor a guarantee of how they will test on your tester. No real world (audio) performance measurements are taken.
These tubes are in good working condition and have been tested for functionality. Signs of prior use are visible, but they still deliver the iconic Amperex sound quality that makes them a favorite for high-end audio applications and vintage tube amplifiers. Product Details: Brand: Amperex Model: EL34 / 6CA7 Quantity: 2 tubes (matched pair) Condition: Used, tested, and working.
These three tubes came out of a seldom used Norelco tape player, tested 100% both sides, each tube. Seems to me the sub numbers are all the same. Appears number to me to be 165 41k2. Nice lettering, I think great tubes, but not a tube expert like some claim on here. I did not clean. I think nice virgin seldom used tubes, just my opinion. Not sure what more you can ask for in 3 LOT 12AX7 TUBES. Please see all pictures and use zoom feature. Often the pictures describe the item better than words. I try my very best and list a lot of pictures, but are not posted as a “try it and see if it fits and send back ” type item. Please know if this is the item that works for you before you order. Thank You for your understanding on this. 35,000 + happy customers! Also please see the 11,900+ vintage radio related parts and other great antiques and oddities from old radio guys estates. Old Radio’s are Fun and parts are getting harder to find! Just like radio parts? Thank you for you order and please follow my store! New items added daily. Also you can go into my store and pick the category for easy shopping. Best to you and Many Thanks, Mike.
This particular set tests very strong and are closely balanced. The print on these tubes is extremely fragile and will easily rub off, most has already rubbed off on one of them, special care was taken not to rub off any more while testing (the one that still has the most print is the stronger of the 2). The tubes’ test results are displayed in the photos (New 12AX7 Spec 100% = 1,600 Gm). See the photos for physical / cosmetic condition. Notes Regarding Tube Tests. All tubes are tested on an Amplitrex AT-1000 tester in the automatic Fixed Bias Mode (for the most conservative results). Test Results are for a general reference only, and are not a guarantee of performance, nor a guarantee of how they will test on your tester. No real world (audio) performance measurements are taken.
VINTAGE AMPEREX BUGLE BOY 12AX7 AMP TUBE. MADE IN HOLLAND IN 1957. TALL GREY PLATES AND D FOIL GETTER. TEST STRONG FOR EMISSIONS, NO SHORTS OR GRID LEAKAGE.
The product is a vintage Amperex 12AX7A ECC83 amplifier tube. It is a type of vacuum tube used in audio amplifiers to amplify electrical signals. Amperex is a well-known brand in the vintage electronics industry. The model number of the tube is 12AX7A ECC83. It is a popular choice among audiophiles and vintage audio enthusiasts. The tube is compatible with various vintage audio and video equipment and can be used as a replacement part.
The product is a vintage Amperex 12AX7A ECC83 amplifier tube. It is a type of vacuum tube used in audio amplifiers to amplify electrical signals. Amperex is a well-known brand in the vintage electronics industry. The model number of the tube is 12AX7A ECC83. It is a popular choice among audiophiles and vintage audio enthusiasts. The tube is compatible with various vintage audio and video equipment and can be used as a replacement part.
This tube (7062/ E180CC) is virtually the same as a 5965 in regard to electrical specifications. Audiophiles have been seeking it out since the price is generally lower than the premium ECC81 NOS prices currently. Like the 5965, it has slightly lower gain than the 12AT7, and has the added advantage of a 10,000 hour heater life to make it another audiophile “secret” tube. These are superb tubes. This tube is about a half-inch taller than the standard 12AT7, so chassis space is an important consideration. Amperex Made in Holland 7062. Tv7 tested NOS TUBES. Test Results are available upon request if not photographed in the listing or already stated. 90 % of our tubes are Tv7 tested. Tubes tested on tv7u the Military standards were tubes needed to meet 60% (minimum value). All our tubes have been tested for. GAS SHORTS TRANSCONDUCTANCE & EMISSIONS. Please see my notes on noise tests below. We have a few different testers available to ensure the quality of the tube (as some tubes can not be tested on the tv7). Tv7 testing is tedious and I spend 12-13 hours a day testing tubes and double testing tubes – if you notice a mistake(like a picture doesn’t match the title) please be gracious and let me know. UNLESS PHOTOGRAPHED WITH THE ORIGINAL BOX- tube will come in repackaged white boxes- 50-90 year old cardboard packaging doesn’t hold together well. We have over the last 20 years amassed a huge collection of vintage amps/ parts / tubes and have decided to downsize that collection. Every tube has been marked for tracking and security purposes – these marks wipe off easily and without the mark no return will be accepted. Sound quality is tremendously SUBJECTIVE. This is a very marginal test, only for. This test needs sound amplification; hearing listening to noise with headphones would indicate a real disaster inside a tube (THE shorts test WOULD already BE evidence OF THIS). There is nothing wrong with performing that noise test. This test is not going to tell you whether the tube will be silent in your SET (single ended triode) amp or in anything else. Ultimately, the best way of testing a tube for microphonics is in an actual chassis or amplifier similar to one in which it is intended to be used. Since amps have a wide variety of circuit designs and tube placement, this test is most effective in YOUR AMP or one that is almost identical. Hence, most people advertising tubes as tested for Noise or Microphonics are probably NOT testing them in any meaningful way for you. “Noise” and “Microphonics” are often buzzwords for other issues. There is a small percentage of tubes that have a problem with noise but far less than most people think. In properly designed circuits objectionable “tube noise” is seldom found. In other words, it is a rare tube that will be noisy when used in most circuits. Always check the data sheet of the tube you plan to use. Tube testers and noise testing. Tube testers do not test for these problems in the manner in which you think, except to the extent that a tube tester with sensitive leakage detection will find far more “noisy” tubes than a tube tester with only “fair” leakage sensitivity, to the extent that the noise is due to this problem. Listening through headphones to tube on a tester is half as good as putting in amp and listening for noise. PLEASE message me BEFORE you open a return. PLEASE NOTE: Tube silkscreen (lettering on the tubes) is VERY fragile. It can be wiped off and destroyed VERY easily.
This tube (7062/ E180CC) is virtually the same as a 5965 in regard to electrical specifications. Like the 5965, it has slightly lower gain than the 12AT7, and has the added advantage of a 10,000 hour heater life to make it another audiophile “secret” tube. These are superb tubes. This tube is about a half-inch taller than the standard 12AT7, so chassis space is an important consideration. Amperex Made in Holland 7062. ULTRA RARE BUGLE BOY LOGO. TEST RESULTS IN PHOTOS ON BOXES. Tv7 tested NOS TUBES. 90 % of our tubes are Tv7 tested some can’t be tested using the tv7. We have a variety of testers available. All our tubes have been tested for. GAS SHORTS TRANSCONDUCTANCE & EMISSIONS. Please see my notes on noise tests below. Test Results are available upon request. We have a few different testers available to ensure the quality of the tube (as some tubes can not be tested on the tv7). Tubes tested on tv7u the Military standards were tubes needed to meet 60% (minimum value). Tv7 testing is tedious and I spend 12-13 hours a day testing tubes and double testing tubes – if you notice a mistake(like a picture doesn’t match the title) please be gracious and let me know. Thousands of tubes to be listed within the coming weeks! We have over the last 20 years amassed a huge collection of vintage amps/ parts / tubes and have decided to downsize that collection. Every tube has been marked for tracking and security purposes – these marks wipe off easily and without the mark no return will be accepted. NOISE TESTING a little information and guide. Tube testers do not test for these problems in the manner in which you think, except to the extent that a tube tester with sensitive leakage detection will find far more “noisy” tubes than a tube tester with only “fair” leakage sensitivity, to the extent that the noise is due to this problem. Loose elements or other defects will not be found. This is a very marginal test, only for. This test needs sound amplification; hearing listening to noise with headphones would indicate a real disaster inside a tube (THE shorts test WOULD already BE evidence OF THIS). There is nothing wrong with performing that noise test. However, this test is not going to tell you whether the tube will be silent in your SET (single ended triode) amp or in anything else. Ultimately, the best way of testing a tube for microphonics is in an actual chassis or amplifier similar to one in which it is intended to be used. Since amps have a wide variety of circuit designs and tube placement, this test is most effective in YOUR AMP or one that is almost identical. Hence, most people advertising tubes as tested for Noise or Microphonics is probably NOT testing them in any meaningful way for you. True “noise testing” (other than using the tube in the exact equipment you plan to use it.) requires a highly sensitive mechanical-based or vibration-based test apparatus, and such devices were ONLY created and used by professional engineering and testing labs run by very large entities back in the old days- such as the US military, Westinghouse labs, etc. Furthermore, “Noise” and “Microphonics” are often buzzwords for other issues. There is a small percentage of tubes that have a problem with noise but far less than most people think. In properly designed circuits objectionable “tube noise” is seldom found. In other words, it is a rare tube that will be noisy when used in most circuits. So if you find yourself rejecting more than one or two tubes because of “noise”, then you probably have an aggressive circuit design or other design issues (such as transformer placement, shielding, etc).
VR9 4D (VR5 = Amperex 7308/E188CC Production #5, = Amperex New York factory, 4 = 1964, D = April). The clarity and sound detail on USN-CEP 7308′s are second to none. These tubes have a clean, incisive presentation, but are also euphonic and musical.
