Magnum on steroids!

[Ruben2000]

I thank our friend Ivconic in advance for his great contribution to the construction of this project and all those who supported.
I have read the whole thread and it is a great project very complete.
I can only build it in DIP.

[Ruben2000]

Since no one has answered my question, I'm posting some files here, maybe it will help someone.

[ivconic]

Hello friends!!!
I would like to ask you a question.
I am assembling MAGNUM TH, could you confirm if I can use these replacements.
3FW=BC557
1GW=BC547
BL=BD139
AL=BD140


I would greatly appreciate your response.

Sorry for missing this one, I somehow overlooked it.
Yes you can.
Use if you have BC327/40 and BC337/40 too.

[ivconic]

Since no one has answered my question, I'm posting some files here, maybe it will help someone.

I made that one too, it is alright, working.
I think i posted video of it somewhere in the beginning of this topic.
Go for it, it must work.
When it comes to the coil; as with any other diy coil: you will have to do it right.

[Ruben2000]

Thank you very much teacher Ivconic for the encouragement.
I would like to consult you about your Magnum TH PCB. In the photo you posted I see that you placed a tantalum on C45, the SENSITIVITY cable is lost through the PCB or I can't see it well; you added a capacitor on pin 4 of U8 with the emitter of Q4.
I only ask about the capacitor that you added, it helps in something because in the schematic it is not appreciated.
Later I will ask about the construction of the coils.

[ivconic]

Thank you very much teacher Ivconic for the encouragement.
I would like to consult you about your Magnum TH PCB. In the photo you posted I see that you placed a tantalum on C45, the SENSITIVITY cable is lost through the PCB or I can't see it well; you added a capacitor on pin 4 of U8 with the emitter of Q4.
I only ask about the capacitor that you added, it helps in something because in the schematic it is not appreciated.
Later I will ask about the construction of the coils.

It's been a while since then and I am not able to remember each little tiny detail, since I haven't done anything similar for long time.
I guess I put tantalum capacitor there because I had it at that moment in front of me on the bench.
To the right side there is finished and ready pcb, to the left is unfinished one, many things are missing.
About coils, I think i posted coil specs. It is important to try to replicate the coil specs as closest as possible.

[Ruben2000]

Hello friends!!!
I would like to know if I can configure my homemade coil in this way.

[Ruben2000]

Sorry I had to make a correction.
According to this.

[Carl-NC]

What is the purpose of TX(2-3)? [I think you mean TX(2-5)]

[Ruben2000]

Yes, I am referring to that section of the TX coil or maybe I just use TX(3-5).
But anyway I'm going to try; the important thing is to take into account the inductance of the coils.
I have only gotten one model for the 10x12 inch elliptical coil. If someone wants to share another model, especially double D, I would appreciate it.
Here I share the form of the 10x12-inch elliptical coil for those who wish, only that at the time of printing they do it in real size; is a contribution from Nikko10.

[Ruben2000]

Hello friends here I share the photos of my PCB, I'm not that good at soldering but I defend myself there; I have used most of the second components but I had to make sure they were good.
Any query or help let me know, it would help me too.

[Ruben2000]

Here are the others.

[Carl-NC]

Next time, before soldering take some ultra-fine steel wool and polish the copper bright. It will make soldering much easier. If soldering will be done over several days then spray a light coat of clear paint to keep the copper from oxidizing. The soldering iron will burn right through the clear coat. A light coat of furniture wax might also do the trick.

[Ruben2000]

Next time, before soldering take some ultra-fine steel wool and polish the copper bright. It will make soldering much easier. If soldering will be done over several days then spray a light coat of clear paint to keep the copper from oxidizing. The soldering iron will burn right through the clear coat. A light coat of furniture wax might also do the trick.

Thank you very much Carl-NC for good advice, I'll keep it in mind for the next one.

[Wiltran]

How are you going to wire the spdt switch in order to switch between 8 and 18 khz? One version Ive seen uses a dpdt switch, and completely switches both 470 and 100 capacitors in and out. The other leaves both capacitors grounded -5v and just swaps the hot tx lead between the two..