Here's what I use to heat 4 x EL84 (actually, 6P14P-EV) and 2 x 6N1P (around 4.2 A filament current in total)
- transformer with 8.5V secondary and 80 VA from Toroidy (50 VA should be sufficient as well, because the Toroidys are really well designed and built, and are running still comfortably closer to their ratings)
- a standard 35 A diode bridge fastened to the chassis of the PSU for cooling
- regulator built on perf board with 22,000 uF first capacitor and an LT1084 (new LT1083s are hard to get around here)
- big heatsink: CTX Thermal Solutions CTX08/50 Heat sink 2.3 K/W (L x W x H) 50 x 88 x 35 mm | Conrad.com
Works great, gets warm 😀
(but I can keep my hands on it indefinitely)
When I bring the amp up on my variac, I see that regulation is attained from around 180-190V (nominal wall voltage around here 230V), so there is some headroom with this design.
Hope this helps to give some additional data points,
Claas
- transformer with 8.5V secondary and 80 VA from Toroidy (50 VA should be sufficient as well, because the Toroidys are really well designed and built, and are running still comfortably closer to their ratings)
- a standard 35 A diode bridge fastened to the chassis of the PSU for cooling
- regulator built on perf board with 22,000 uF first capacitor and an LT1084 (new LT1083s are hard to get around here)
- big heatsink: CTX Thermal Solutions CTX08/50 Heat sink 2.3 K/W (L x W x H) 50 x 88 x 35 mm | Conrad.com
Works great, gets warm 😀
(but I can keep my hands on it indefinitely)
When I bring the amp up on my variac, I see that regulation is attained from around 180-190V (nominal wall voltage around here 230V), so there is some headroom with this design.
Hope this helps to give some additional data points,
Claas
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