neazoi
Advanced Member level 6
Hi,
I am building a small AM TX attached.
I would like to replace the diodes with tube rectifiers (semiconductor-free), whereas I need to keep the power transformer simple (no center tap).
There as three options without a center tap, I am aware of:
1. A half wave rectifier (too much ripple)
2. A full wave bridge rectifier (it must use 4 tubes)
3. A full wave voltage doubler (it uses just two tubes)
I like thw 3rd option, but there are no dual diode rectifier tubes, with separate cathodes, that can provide around 27mA or so for both sections of the 6cq8. So I have to use two separate tubes.
Now, I am thinking if a dual triode tube, can be used for the purpose, like the ecc83 etc. If so, how should the grids be connected (just left them floating?)
If this can work, how about use their grids for regulating the HV as well, this will double their use.
Please let me know if my thoughts are correct. Any available information on the topic?
I am building a small AM TX attached.
I would like to replace the diodes with tube rectifiers (semiconductor-free), whereas I need to keep the power transformer simple (no center tap).
There as three options without a center tap, I am aware of:
1. A half wave rectifier (too much ripple)
2. A full wave bridge rectifier (it must use 4 tubes)
3. A full wave voltage doubler (it uses just two tubes)
I like thw 3rd option, but there are no dual diode rectifier tubes, with separate cathodes, that can provide around 27mA or so for both sections of the 6cq8. So I have to use two separate tubes.
Now, I am thinking if a dual triode tube, can be used for the purpose, like the ecc83 etc. If so, how should the grids be connected (just left them floating?)
If this can work, how about use their grids for regulating the HV as well, this will double their use.
Please let me know if my thoughts are correct. Any available information on the topic?