4 Raytheon 6SN7GT 6SN7GTB tubes Parallel Plates. AT1000 Tested All tubes have Parallel Black Plates and all are 6SN7GTB tubes Tubes were checked for noise and microphonics One of the well known attributes of the Amplitrex is the sensitivity it has for gas testing. It is likely other tube testers will show no gas at all for these tubes. Amplitrex AT1000 results. New tube spec mhos is 2600/2600.Tube CodeEmissions %GM % mhosH-K uAGas mAC2498/106119/1112600/26900/0.0/.2E2191/92115/1153600/36000/0.2/1.3C14101/9796/1032500/27000/0.2/.2280 57-3987/91111/1072890/28000/0.2/.2 Acceptable practice is to have the gas below 1ma. So these are within the good range. Cleaning the tubes is being left to the buyer since often cleaning the tubes also removes labeling.Results are written on the tubes. These can be easily removed with a moist paper towel. Domestic purchases can be combined to reduce shipping costs. International shipping is through the ebay Global Shipping Program. This program may not combine shipping. Contact eBay to find out. Items usually ship the day after payment is received.

Three (3) electrically and physically matched vintage NOS/NIB Raytheon 6SN7GTB vacuum tubes made in USA (2 GEs and 1 Sylvania). Electrically test using a calibrated Sencore MU150 Continental II Vacuum Tube tester. These tubes test AS-NEW and have never been used. Due to the nature of vintage vacuum tube electronics, these tubes are being sold for parts AS-IS and will be properly packed for shipping. Please check my extensive feedback rating for confidence.

2 Raytheon 6SN7GTB 6SN7 tubes, Matched Codes, Black Parallel Plates. Chrome Top. AT1000 Tested @ 250V All tubes are 6SN7GTB and have parallel plates. Tubes were checked for noise and microphonics Amplitrex AT1000 results. New tube spec mhos is 2600/2600.Tube CodeEmissions %GM % mhosH-K uAGas mAG08 91/92107/1072800/28000/0.2/.2G08 80/7092/692400/18000/0.2/.4G08 85/8096/862500/22500/0.8/.2 Acceptable practice is to have the gas below 1ma. So these are well within the good range. Cleaning the tubes is being left to the buyer since often cleaning the tubes also removes labeling.Results are written on the tubes. These can be easily removed with a moist paper towel. Domestic purchases can be combined to reduce shipping costs. International shipping is through the ebay Global Shipping Program. This program may not combine shipping. Contact eBay to find out. Items usually ship the day after payment is received.

One (1) 6SN7GT Raytheon vintage vacuum tube, made in USA, tube has black ribbed hanging plates,clear top, bottom side rectangular getter, there is a crack in the base, tube tests: 88, 88 % Price is for all tubes pictured. Tube did not have original box, I assume it as used. Scale 1-100, good quality percentage on my Triplett starts at 54. We test all tubes we sell! We will combine shipping! Check out my other tubes!

Qty 2 RAYTHEON 6SN7GTB Matched Pair and Date Codes 5-1952 Side D Getter Black Plates MFG EIA Code 280 RAYTHEON Passed all tests on our EICO 666 Tube Tester - Tests New - Tightly Matched <5% Match Tubes will be shipped in new protective packaging to ensure safe arrival. Tubes will be in new white boxes as shown in the pictures. In Stock - Fast Shipping from Tennessee Thanks for looking - Buy with confidence

2 tall Support Rod Raytheon 6SN7GTB 6SN7GT tubes. AT1000 Tested @ 250V All tubes have black parallel plates. Tubes were checked for noise and microphonics Amplitrex AT1000 results. New tube spec mhos is 2600/2600.Tube Emissions %GM % mhosH-K uAGas mA6SN7GT90/8588/922300/24000/0.2/.26SN7GTB 85/9096/962500/25000/0.2/.2 Acceptable practice is to have the gas below 1ma. So these are well within the good range. Cleaning the tubes is being left to the buyer since often cleaning the tubes also removes labeling.Results are written on the tubes. These can be easily removed with a moist paper towel. Domestic purchases can be combined to reduce shipping costs. International shipping is through the ebay Global Shipping Program. This program may not combine shipping. Contact eBay to find out. Items usually ship the day after payment is received.

6SN7GTB Raytheon Vintage Vacuum Tubes NOS. Have other tubes listed and lots available in auctions, if interested in other tubes!

This is a Used Pair 6SN7GTB Vacuum Tubes. Both are made by Raytheon, However one carries a Silvertone Label but bears the Raytheon Manufaceur code (280). They are pretty much identically physically the same tubes. These have been tested on a Hickok 539C tube tester which is periodically checked for calibration. (I use tubes that are calibration tubes tested specifically for that application and if out of calibration for the range tested it is recalibrated) The testing is for Transconductance Gm in uMhos and plate current in Ma. They tested as follows. The one labeled Silvertone tested at 3000-3000/1640 at 7ma each. The one labeled Raytheon tested 2400-2300/1640 at 5 ma for either tube. Both tube were checked for shorts and none noted. One tube has top square getter and the other (Silvertone) a side getter. The pins are very clean and no cracks in base of either tube or loose glass to base adhesive of either tube (tight bulb to base seals) Both tubes have full black plates as shown. Shipping will be USPS first class. See my other auctions. Thanks for looking.

Vintage Raytheon 6SN7GTB Vacuum Tube Halo Getter. Tested Stronger than NOS. 3450/3500 (NOS spec 2600) 132-134%

2 Raytheon 6SN7GTB 6SN7 tubes, Matched Codes, Black Parallel Plates. Chrome Top. AT1000 Tested @ 250V All tubes are 6SN7GTB and have parallel plates. Tubes were checked for noise and microphonics Amplitrex AT1000 results. New tube spec mhos is 2600/2600.Tube CodeEmissions %GM % mhosH-K uAGas mAG08 91/92107/1072800/28000/0.2/.2G08 80/7092/692400/18000/0.2/.4G08 85/8096/862500/22500/0.8/.2 Acceptable practice is to have the gas below 1ma. So these are well within the good range. Cleaning the tubes is being left to the buyer since often cleaning the tubes also removes labeling.Results are written on the tubes. These can be easily removed with a moist paper towel. Domestic purchases can be combined to reduce shipping costs. International shipping is through the ebay Global Shipping Program. This program may not combine shipping. Contact eBay to find out. Items usually ship the day after payment is received.

One (1) 6SN7GT Raytheon vintage vacuum tube, made in USA, tube has black ribbed hanging plates,clear top, bottom side rectangular getter, there is a crack in the base, tube tests: 88, 88 % Price is for all tubes pictured. Tube did not have original box, I assume it as used. Scale 1-100, good quality percentage on my Triplett starts at 54. We test all tubes we sell! We will combine shipping! Check out my other tubes!

This is a Used Pair 6SN7GTB Vacuum Tubes. Both are made by Raytheon, However one carries a Silvertone Label but bears the Raytheon Manufaceur code (280). They are pretty much identically physically the same tubes. These have been tested on a Hickok 539C tube tester which is periodically checked for calibration. (I use tubes that are calibration tubes tested specifically for that application and if out of calibration for the range tested it is recalibrated) The testing is for Transconductance Gm in uMhos and plate current in Ma. They tested as follows. The one labeled Silvertone tested at 3000-3000/1640 at 7ma each. The one labeled Raytheon tested 2400-2300/1640 at 5 ma for either tube. Both tube were checked for shorts and none noted. One tube has top square getter and the other (Silvertone) a side getter. The pins are very clean and no cracks in base of either tube or loose glass to base adhesive of either tube (tight bulb to base seals) Both tubes have full black plates as shown. Shipping will be USPS first class. See my other auctions. Thanks for looking.

Vintage Raytheon 6SN7GTB Vacuum Tube Halo Getter. Tested Stronger than NOS. 3450/3500 (NOS spec 2600) 132-134%