I have checked this against my other testers and it works as it should. I just don’t test tubes as much anymore and these have to go.The item “Vintage TC-136 Sencore Vacuum Tube Checker Tester for TV Radio Etc. Repair” is in sale since Sunday, January 11, 2015. This item is in the category “Business & Industrial\Electrical & Test Equipment\Test Equipment\Tube Testers”. The seller is “mg-crazy” and is located in Clinton, Indiana. This item can be shipped to United States and to Canada and to United Kingdom and DK and RO and SK and BG and CZ and FI and HU and LV and LT and MT and EE and to Australia and GR and PT and CY and SI and to Japan and to China and SE and KR and ID and to Taiwan and to Belgium and to France and to Hong Kong and to Ireland and to Netherlands and PL and to Spain and to Italy and to Germany and to Austria and IL and to New Zealand and SG and to Switzerland and NO and SA and UA and AE and QA and KW and BH and HR and MY and CL and CO and CR and DO and PA and TT and GT and SV and HN and JM.