10-06-2020, 01:02 PM
Good progress Trevor. I did have a quick look at the specs for maximum bulb temperature but interestingly this does not appear to be quoted although with other Russian valves generally is. I have seen a mention somewhere but that may be 'Radio Museum' not Russian. I do notice maximum ambient stated is 85 degrees C so I suspect you are probably well within spec, at least for intermittant operation.
Although I have some of these, one reason I have not used any so far is that they seem ideal for transmitter use which is not something I need. For audio I have settled for normal 6V heaters up to yet, although it has been in the back of my mind for some time.
Tracy
Although I have some of these, one reason I have not used any so far is that they seem ideal for transmitter use which is not something I need. For audio I have settled for normal 6V heaters up to yet, although it has been in the back of my mind for some time.
Tracy