Im not having a good month.
Now my much beloved TS830S has gone tits up on my.
It started to fail two weeks ago when i switched it on no RF output. So I left it running for about 1 hr and then 60 watts. OK that will do. But this weekend nothing at all. so I took some measurements only to find that the 12AY7 valve base had problems. So I pulled the RF board out and I found cracks around the solder joints. The pins where in a mess so I had to remove the base and clean up all the pins. Put it back and re-soldered it in. But as the board was out I took some other measurements and found the 12AY7 grid leak resistor was open circuit and the one of the two cathode resistors had gone a bit high. Both replaced. So i put it all back together. Switched it on and still on RF output but then I could see the HT volts dropping to 350 volt and not 850 volts.
I think I may have a short in one of the PA valve now ?
Has any one had anything like this???
Oh well it is over 25 years old so I guess it would like a bit of attention and TLC.
Now my much beloved TS830S has gone tits up on my.
It started to fail two weeks ago when i switched it on no RF output. So I left it running for about 1 hr and then 60 watts. OK that will do. But this weekend nothing at all. so I took some measurements only to find that the 12AY7 valve base had problems. So I pulled the RF board out and I found cracks around the solder joints. The pins where in a mess so I had to remove the base and clean up all the pins. Put it back and re-soldered it in. But as the board was out I took some other measurements and found the 12AY7 grid leak resistor was open circuit and the one of the two cathode resistors had gone a bit high. Both replaced. So i put it all back together. Switched it on and still on RF output but then I could see the HT volts dropping to 350 volt and not 850 volts.
I think I may have a short in one of the PA valve now ?
Has any one had anything like this???
Oh well it is over 25 years old so I guess it would like a bit of attention and TLC.
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