|
15V on a 6.3V CRT is not a safe voltage.
The CRT would likely load the tester down to the correct specs, but to be safe here is what I'd do. Google the number of your CRT and add 'tube data' to the search string. You should find a data sheet. That sheet will give you heater voltage (likely 6.3Vac) and current (likely 600mA or 450mA). Dig around in in your signal tube stash for one you can live with ruining that also has the same heater ratings as the CRT and use it's heater as a dummy test load for the tester. If the tester puts out around 6.3V your good to test the CRT, but if it is over 9V there is some further tester repair to be done.
|