Re: [neonixie-l] Radar CRT anode voltage booster, 100 Vac 800 Hz

['bogdan paduraru' via neonixie-l]

Paolo For an ad hoc solution  I recomand to use my setup for the EL displays A Chinese TDA2030 power amplifier, its output conected to a secondary of power transformer ( primary 220VAC / 4 to 8 /10VAC secondary)  Input of tda amplifier conected to a signal generator  If need more details, contact me privately  Bogdan  On 3 Mar 2026, at 11:46, Paolo Cravero <paolo.crav...@gmail.com> wrote:  Hello. I am trying to revive a radar display unit from early 1970's that mounts a 7ABP7A CRT. The filament tests good. I've sorted out all voltages and I need to provide 100VAC to generate the required 7kV on the anode (5kV minimum). Thing is ... it's 100 VAC at 800 Hz, because boats back then used 800 Hz. I think they settled to 400 Hz afterwards and I have no idea what they run off now. I attach the diagram of the voltage booster inside the display. Considering the totem of voltages I need to feed to the unit, I will have -150, +10, +20, +80-100, +350 VDC readily available as a source for 100 VAC 800 Hz. I am looking for a simple circuit arrangment to produce the required AC (or alike) and I hope neonixie wizards can help. Thank you! Paolo PS: if everything works, the next challenge will be 80Vac at 30Hz for the deflection coil motor assembly. <immagine.png> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/CABj2Vab6c1pxDJCycpXdnqS9r9UPYW24bAumzy8%2BvRxWh9sSPQ%40mail.gmail.com. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/B22CCAEC-0E98-4C81-9532-254D98011D59%40yahoo.com.