The 4 matched Electro-Harmonix 6550 tubes in this lot all have triple micas and gray plates. The gold print on the glass has the Electro-Harmonix logo with matching dates codes (00 09 = September 2000). These tubes have unknown hours of use. They have been tested at 500V settings on an AT1000 tester. Results range from 59.2 - 62.2 mA for current draw and 6700 (105%) - 7000 (109%) Gm for transconductance.
Each tube ships with test results (see photos). Each tube ships packed with the test results shown in the photos. The item "Lot of 4 matched Electro-Harmonix 6550EH tubes, AT1000 tested, Sept 2000" is in sale since Sunday, August 1, 2021.
This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets". The seller is "chelseawin-mn" and is located in Saint Paul, Minnesota. This item can be shipped worldwide.