I was thinking that TS was looking for a plug-and-play replacement for the ECL86. I thought that solutions with one or more cables running out of the radio (or making extra provisions in all the radios to be able to connect the extra power supply) was not a a plug-and-play solution within the terms/conditions of this thread.
Because a voltage doubler produces about 13-14V you might end up needing a buck/boost converter, which is much more complex than a step-up or step-down.
Please keep in mind P tubes are specified for a particular current, not voltage. So i think its best to use current mode feedback instead of voltage mode feedback.
If you account for diode losses and a switcher of about 80% efficiency, i reckon that the current from the 6.3V will be about +35-40% over that of an ECL86. ((1/0.8)*100)+20%
rectifying the 6.3 directly by means of a bridge is quite lossy. So if you use a doubler you end up with about 13-14V under load (300mA), or so PSUD2 says.
Please keep in mind P tubes are specified for a particular current, not voltage. So i think its best to use current mode feedback instead of voltage mode feedback.
If you account for diode losses and a switcher of about 80% efficiency, i reckon that the current from the 6.3V will be about +35-40% over that of an ECL86. ((1/0.8)*100)+20%
rectifying the 6.3 directly by means of a bridge is quite lossy. So if you use a doubler you end up with about 13-14V under load (300mA), or so PSUD2 says.
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I am aware of that. But with a specified current comes a more or less specified voltage. If your voltage is close enough to about 13V, it will do just fine for a PCL86.
Why don't we just throw out our old devices and buy new ones. Before we actually come full circle of gutting the entire radio and replacing it's insides fully and only the shell will be the same full of holes piece of wood
In reality, an AM/FM radio costs less than the tube you want to replace, so why not?
Mini radio AM/FM - Haut-parleurs stereo - Universel - Slim: Amazon.ca: Maison et Cuisine
Mini radio AM/FM - Haut-parleurs stereo - Universel - Slim: Amazon.ca: Maison et Cuisine