Bottlehead are very easy. You can even do it if you cannot read schematics. I have built the phono and it works well. The photos will guide you through and you can test it with a multimeter. They sound fine too. I have built a number of the Bottlhead kits.
I will qualify my statements with the fact that I have known Dan Schmalle (head Bottlehead) for about 25 years. His kits work. Get an optivisor if you are over 40 and save a lot of grief over dry solder joints due to presbyopia.
I will qualify my statements with the fact that I have known Dan Schmalle (head Bottlehead) for about 25 years. His kits work. Get an optivisor if you are over 40 and save a lot of grief over dry solder joints due to presbyopia.