Wall Of Sound DIY Special Project: Thunderbirds are Go!
The Tubelab.com, Simple Push-Pull (SPP) EL84 Amplifier
PART 1: Cost Breakdown and Parts Ordering Information
By Steve Graham
But before we get right into it, a special thanks to our patron Erik in Seattle for ‘sponsoring’ this project. Thanks to Erik trusting me with some of his hard-earned dough, the build process starts now! All WOS followers will get the benefit of detailed instructions for building their own amps.
It will take a few weeks for the chassis to arrive, and there’s not much I can do ‘til then – it all starts with the boring metalwork. Don’t get in a tizzy, prospective amp builders: just some light labour with a ruler, a file or two, and a drill like the one Miss K is seen holding in the picture above are all that’s required for the chassis work.
Erik is wisely opting for the “Heavy” transformer package. See the attachments below for a description of the transformer options.
Also, thanks to Miss K. for adding a bit of glamour to what can be a subject sorely lacking in it.
No more preamble, straight to business. See the two attachments below. They detail the cost breakdown and parts ordering information. There is a Canadian dollar version for those living in the, “Great Frozen North” and a U. S. dollar version for those living south of the 49th parallel.
Please Note: If you already have, or once you get, the SPP circuit board, DO NOT assemble any parts to it until after the chassis prep is complete. The board is used as a template and only works as such without any parts on it. A few very minor modifications to the board,which will aid chassis layout, also need to be made before parts are added. As well, with the chassis I’ve chosen, some components will go on the top side of the circuit board and some will mount on the bottom.
Attachment 1: Canadian Dollar Cost Breakdown (link)
Attachment 2: U. S. Dollar Cost Breakdown (link)
…More to follow in the coming weeks.