Description
Description Here for sale is a single Siemens k61 12Au7. This tube features a slanted square getter. It has been tested on an Amplitrex AT1000. The tube has good microphonic response and tests over NOS spec for both plate current and Gm. The triodes have a 4% emission match and exact Gm Match. Great for use in circuits that require balanced triodes. The type code is not legible but I believe this is a k61 based on comparing to a similar date code tube that I also have available. Test Data: Test Parameters - 12AU7 Setting, Fixed Bias, Automatic Result Format - Plate Current % of NOS Target / Gm % of NOS Target, Microphonic performance rated on a subjective 1-5 scale, (1) being unacceptable, (5) being near perfect. Triode 1 - 114/104 - Microphonic Test 3/5 Triode 2 - 110/104 Microphonic Test 4/5 Payment Accepted, along with all eBay approved payment methods. - Payment required within (3) days of purchase or auction close. Returns No 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 Tax eBay 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