So after finishing my first tube amp build, I caught the itch to do more. I found a schematic of a rad sounding preamp and wanted to turn it into a head, so I, using photoshop, combined the preamp and power amp.
I made a couple changes between the schematic and layout (namely dedicating V3 as a cathode follower and EQ driver). Because my schematic is pieced together from a couple different things, I left the component numbers off the layout but included the values.
I’ve left heater wiring off the layout because it would just be messy to have it on there.
The lead dress on the layout isn’t what it would look like in application. I learned a bunch from my Express build and what not to do.
As far as transformers and the choke goes, I was thinking Heyboers (power transformer high voltage secondary at 690v or 345 a side).
All resistors are going to be 1W Carbon Film, except for the dropping resistors off the B+ are all 3w Metal Oxide, and screen grids are 5W Wirewound.
Can anyone see any issues or things I got wrong? I’ve attached the schem and layout.
I made a couple changes between the schematic and layout (namely dedicating V3 as a cathode follower and EQ driver). Because my schematic is pieced together from a couple different things, I left the component numbers off the layout but included the values.
I’ve left heater wiring off the layout because it would just be messy to have it on there.
The lead dress on the layout isn’t what it would look like in application. I learned a bunch from my Express build and what not to do.
As far as transformers and the choke goes, I was thinking Heyboers (power transformer high voltage secondary at 690v or 345 a side).
All resistors are going to be 1W Carbon Film, except for the dropping resistors off the B+ are all 3w Metal Oxide, and screen grids are 5W Wirewound.
Can anyone see any issues or things I got wrong? I’ve attached the schem and layout.
Attachments
