WALL-E
100+ Head-Fier
- Joined
- Dec 12, 2011
- Posts
- 202
- Likes
- 20
Quote:
I checked voltage and current consumption on the cathode resistor and depends of what tubes I used it is from 84-90V and current is 168mA-184mA what give the Rk wattage between 14-17Watt idle and with the load on is almost the same. Of course better oversize the resistor to hold in reserve few watts or use smaler in parallel which will disperse the heat better then single one.The Rk like output coupling caps have an effect on sound and better use good components.
I'll use non inductive 1% Wirewound resistors like, Mills MRC50 this one is 50Watt or go with MRA-12 series 12Watt so 3 in parrarel give me 36watt seems enough.
That was close I was almost beginning to forfeit!
Anyway Wall-E what sort of resistor are you gonna use as output coupling resistors? The Mills don't seem to handle a lot of watt... I figured out my SETA are inductive so it might be a problem, what do you think?
I checked voltage and current consumption on the cathode resistor and depends of what tubes I used it is from 84-90V and current is 168mA-184mA what give the Rk wattage between 14-17Watt idle and with the load on is almost the same. Of course better oversize the resistor to hold in reserve few watts or use smaler in parallel which will disperse the heat better then single one.The Rk like output coupling caps have an effect on sound and better use good components.
I'll use non inductive 1% Wirewound resistors like, Mills MRC50 this one is 50Watt or go with MRA-12 series 12Watt so 3 in parrarel give me 36watt seems enough.