I am hoping to build a small SE valve amplifier as a project. It is my first time building an amp and I am looking for some help. I posted another thread on here relating to a similar project salvaging parts from an (sadly broken) old tape recorder. However, it turns out I have different valves than I originally though and so, I have started a fresh with a new thread. I hope this is ok. I have chosen the schematic bellow as a starting point. I have a few questions relating to the components. Non of the resistors on the diagram a wattage rating. I'm not sure how to work this out in order to order suitable resistors.
For the HT 250v I'm planning to use a boost converter and I have an LM317 Buck converter for the heater's 6.3v supply.
I understand that in order to use the DC HT supple from the boost converter with the schematic bellow, some more work be required before the 1k resistors to remove ripple.
I'm using this build which uses boost and buck converters in place of a proper mains transformer as reference
The video above it described a build which uses a boost converter for HT supply. However, he uses a different tube and so his schematic is different to the one bellow.
In his build, after the boost converter before R3 and R7 he uses 2 x 100uf 400v caps and a 390 3W resistor (for smoothing?). I am unsure whether I would need to change the values here to suit the rest of my ECL86 schematic?
I'd be really greatful for any help figuring out how to adapt this to make it work with the schematic I've posted.
Kind regards!
For the HT 250v I'm planning to use a boost converter and I have an LM317 Buck converter for the heater's 6.3v supply.
I understand that in order to use the DC HT supple from the boost converter with the schematic bellow, some more work be required before the 1k resistors to remove ripple.
I'm using this build which uses boost and buck converters in place of a proper mains transformer as reference
The video above it described a build which uses a boost converter for HT supply. However, he uses a different tube and so his schematic is different to the one bellow.
In his build, after the boost converter before R3 and R7 he uses 2 x 100uf 400v caps and a 390 3W resistor (for smoothing?). I am unsure whether I would need to change the values here to suit the rest of my ECL86 schematic?
I'd be really greatful for any help figuring out how to adapt this to make it work with the schematic I've posted.
Kind regards!