N
N_Cook
Guest
Added a 12V 1.5 inch fan at the Tx. Using the unused heater tag for main
mount of the fan to solder a solder tag then that bolted to the fan.
Setting fan at 20 degrees to the horizontal and cutting and fitting a
shroud from that red impregnated cardboard stuff to direct the flow into one
side , up, over top and back out the other side between windings and bobbin.
As secondary side gets hotter than primary , fan positioned mainly on that
side
Air flow checked using a joss stick. Perhaps next time using some DC from
the amp rather than bridge rect and cap off the heater supply as light
current drops in the diodes bring it down to less than 9V . Retained the
template for the shroud for the next one of these to attend to.
mount of the fan to solder a solder tag then that bolted to the fan.
Setting fan at 20 degrees to the horizontal and cutting and fitting a
shroud from that red impregnated cardboard stuff to direct the flow into one
side , up, over top and back out the other side between windings and bobbin.
As secondary side gets hotter than primary , fan positioned mainly on that
side
Air flow checked using a joss stick. Perhaps next time using some DC from
the amp rather than bridge rect and cap off the heater supply as light
current drops in the diodes bring it down to less than 9V . Retained the
template for the shroud for the next one of these to attend to.