Hello.
I am new on this forum, and new into diy. I have done some soldering, changing parts, fixing and tweaking, but never gone in to a real project. I have tried, but didi not have the time, the skills or the patience to make something serious out of it.
I have been into hifi/hi-end for many years and always wanted to learn the basics and understand, and make something out of it.
Suddenly, I have the time and the opportunity to go into a prosess like this. After some consideration I have decided to use the next months/years to learn and make (hopefully) build me my first amp.

I live in Europe so this is a 240V amp. I have received the z-kit board, and have spent some time looking at projects from other members. Very impressing .
Since I live in Europe , I have to find the parts from here. I guess I will have a lot of questions about what I can use, and not.  I have some very good old tubes that started the whole idee. I will build the amp -SE-using EL84 and 6922.

Starting with the trafos.
I have contactacted Lundahl directly, and they are very helpfull. They have a good reputation and very good products.

The contactperson adviced using a LL1683 as mainstransformator. He thinks it will work well with the tubes and the construction.

As outputtransformers he advice 2x LL1663. I am not sure about this. The trafo operates well between 5-8Ohm. Not that well (teoretical) outside. In todays speakermarked, it is difficult to know what really happens, and I want to have a flexible amp.
He then recommend a pair of LL1679. They are more flexible and can also be used in other projects if I decide to to something else after a while.
Anyone knows about Lundahl and the trafos? Any advice to a novice who wants to learn . I want to make my amp as flexible as possible, but I also want it to be good sounding. If I have to choose, I go for the best sound.
I appreciate all help, and hpoe I can contribute with something here myself. One thing, keep it simple. I can be a slow learner .

240V, 50/60Hz. line to 600V (300-0-300) at 200mA center tapped, 6.3V at 4A and 5V at 3A

Keep us posted. I’ve long been a fan of Lundahl transformers and wondered how they would perform in this circuit.

Cheers!

Unfortunatly, Lundahl did not have an outputtransformer that mached the needs. They had 2 powertransformers that I bought, and I have to find an outputtransformer matching. I have to use a lot of time in front of the pc. Hopefully I find a good-quality transformer that matches.

After some communication with the people at Lundahl, it seems that we founnd a solution. The contactperson has read about the Zkit and has a suggestion. We have talkes about several options, but we have landed here..
I qoute him and ask for some help. I have to make a change on the original Zkit, and do not how this lokks like, or even is going to be done. Please advice me for the change mentioned. If this lokks ok, I will go for Lundahl onboth mains and outputtransformers .

This is from my contactperson at Lundahl. "From a random schematic for the zkit-1 found on the web, it seems like the design do not use the 5V, but only use 6.3V for filament voltage and rectified 300Vrms. If that is the case it should be possible to use the LL2741 mains transformer if you modify the design to have a full wave bridge rectifier (instead of the full wave two diode rectifier). See the datasheet of the LL2741 in the following link: https://www.lundahltransformers.com/wp-content/uploads/datasheets/2741.pdf.
The suggestion of the LL2741 is purely based on the original requirement "Power transformer for a 240V, 50/60Hz. line to 600V (300-0-300) at 200mA center tapped, 6.3V at 4A and 5V at 3A"

Is this something that I can do with a little help?

Best regards