As an alternative to the “upside down” build, I mounted the tube sockets on a separate platform made from scrap aluminium. It slides into the second highest slot in the Hammond case, which leaves enough room for the stock heatsinks below if the amp itself is in the second lowest slot.
See here for how it looks with the lid on—the tubes stick out almost completely. Also very convenient for tube rolling, as I don't have to worry about putting too much pressure on the board.
I think Ferrari also made a similar platform for his other SOHA II build?
So there's not issues with air wiring the sockets to the board? (like picking up interference or anything)
Case work is the hard part for me. I sure wish I could build as well as some of you. I'm not sure I could fabricate that support you and Ferrari mounted the sockets to, so I am inclined to think the "upside down" build will be easier for me. I know some have thought there might be an issue with flexing the board when inserting and removing tubes, but aren't there holes on the board to mount standoffs near the sockets?
Sorry for all the questions. I just finished reading the original thread (47 pages with my preferences hehe). I already read all of this thread and Alex's site. Now that I've decided I'm building this amp, I'm eager to get started, but I have questions about a few parts options. Little things though Anyway, here they are...
Any DPDT switch should be OK to replace the jumpers, right? Any particular power rating I should look for?
I want to maximize my tube options, so I'm planning to use the more powerful transformer. If I can source the Avel Y236203, will it still fit in the 1455T2202 (the long one) case? I'm planning to put a small DAC inside as well (a BantamDAC for now, perhaps a y1 later).
There has been some talk about using different transistors. Would it be realistic to socket them to make swapping easier? Does it matter if the heatsinks are attached to the board, or can they just be resting there attached to the transistors?
I'm planning to socket the opamp in the e12 circuit based on the suggestion in the other thread. That's all the changes I have in my notes so far
I want to thank everyone in advance for patience with all my questions. I'm skilled with a soldering iron (worked in manufacturing for many years), but I knew little about what I was soldering. I'm getting there though! I especially want to thank Alex for all the explanations of his circuit design. It has been extremely educational. I understood almost all of it! lol
I sent an email to Jeff already asking about kits and options. Hopefully I can get everything ordered this week and have it built by the end of the month.