the added elements are wired from the existing traces using 18 age wire (which is all I had at the time).
I was able to use about 90% of the original solder traces.
The fets are mounted on little pieces of perf board, and then wired into the rest of the circuit. It wasn't to hard to add them, because since the last stage is directly coupled to the road equalization filter, i was able to basically swap a cap for a transistor (connecting the third lead to the power supply)
however, vacuum tubes require little electric heaters to work, and that draws a lot of current. so much current, in fact, that you have to upgrade the power supply. that's a lot for a beginner's project, so I redesigned the circuit slightly to use mosfet transistors in the two added stages.
The layout of that page is appropriately old timey. Anyway the two main circuits go from a 4 tube layout to a 6 tube layout
Since it is working perfectly well, I've decided to mod it. My mods are based on this article from the mid 90's http://www.normankoren.com/Audio/Spice_preamp_2.html
It is in good, original working condition. However, there are lots of mods you can do to "improve" it's function. Some of them even help.
However, I've never really done any circuit assembly(a little bit for school), so this has been a bit of a challenge.
This is not so strange as my dad was into Hi-Fi back in the day, and that involved a lot of tubed gear.
Crowdfunding, unemployment troubles
I have been trying to get money from unemployment for months, after being told I qualify for pandemic assistance. But it has been very hard and I have gotten nothing despite doing everything I should and can do. I need money for food and bills.
If you can, please help out. My Venmo is FarahT, my cashapp is $Underwraps77, and my paypal is here (deadname warning): http://paypal.me/farahth
I also do some writing, and have a Patreon: https://www.patreon.com/posts/31772354
❤️
Transitioning in mid-life
alt: @confusedcharlot@kolektiva.social
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http://quietcarlota.tumblr.com (backup)
https://www.pillowfort.io/charlotte
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