08-24-2014, 04:05 PM
Howdy all!
My mother sent me her PT6 to clean/replace the volume control cause it's crunchy at lower volumes and she said the pilot lamp was blowing out every 20 to 30 power cycles.
So I got to thinking about it. I came across an article a while back on the ARF. what do you all think about adding two 6.8 volt 5 watt zeners in series to stop the surge when it's first powered up?
as for the surge.. Would that be because I used 33 uf caps for 22A and 22B? if I remember correctly (it's been a few years since I redid this set) I used 33 because I was getting some hum using 22uf. when it's warmed up the voltage @ the pilot lamp is 5.7 volts.
the placement on my drawing was just random, btw..
[Image: http://i1303.photobucket.com/albums/ag14...7e4040.jpg]
[Image: http://i1303.photobucket.com/albums/ag14...a73194.jpg]
Thanks for your input!
Bret
My mother sent me her PT6 to clean/replace the volume control cause it's crunchy at lower volumes and she said the pilot lamp was blowing out every 20 to 30 power cycles.
So I got to thinking about it. I came across an article a while back on the ARF. what do you all think about adding two 6.8 volt 5 watt zeners in series to stop the surge when it's first powered up?
as for the surge.. Would that be because I used 33 uf caps for 22A and 22B? if I remember correctly (it's been a few years since I redid this set) I used 33 because I was getting some hum using 22uf. when it's warmed up the voltage @ the pilot lamp is 5.7 volts.
the placement on my drawing was just random, btw..
[Image: http://i1303.photobucket.com/albums/ag14...7e4040.jpg]
[Image: http://i1303.photobucket.com/albums/ag14...a73194.jpg]
Thanks for your input!
Bret
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