What really amazed me about the R|Z568m tubes is that even though at 50mm tall, they are only 10mm taller than an IN-18, their size is enormous by comparison. They are "fatter" than an IN-18 so they have better overall proportions, whereas the IN-18 is more tall-and-skinny.
On Sunday, July 25, 2021 at 4:59:37 PM UTC-7 MichaelB wrote: > i could not agree with you more! > > On Sunday, July 25, 2021 at 4:55:13 PM UTC-7 nickja...@gmail.com wrote: > >> But they are beautiful! >> >> On Sun, Jul 25, 2021, 11:48 AM gregebert <greg...@hotmail.com> wrote: >> >>> Just to be safe, I suggest you measure the voltage drop across the anode >>> resistor, and use Ohm's law to compute the current. For an 8.2K anode >>> resistor, and a current of 6mA, the voltage-drop should be around 50V. If >>> the voltage is below 40 volts, your anode current is too low because it's >>> less than the datasheet minimum-current spec of 5mA and you run the risk of >>> cathode poisoning. >>> >>> I use an actual current-regulator in my designs, rather than just a >>> resistor, so that variations in tube characteristics and supply voltage >>> dont affect the current. >>> >>> On Saturday, July 24, 2021 at 3:30:00 PM UTC-7 MichaelB wrote: >>> >>>> Still have to build the taller colon towers, but I was pleased to see >>>> that these work as possible replacements for the real thing. I used 8.2K >>>> Anode resistors vs. the 10K's Thomas used to recommend for the Z568's. And >>>> since they're taller they require a taller top, as an aside. >>>> >>>> [image: 8E6AD098-89D0-4C9C-A2CE-2204AFC1AACB_1_105_c.jpeg] >>>> >>>> >>>> >>>> >>>> >>>> -- >>> 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+...@googlegroups.com. >>> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/603ee847-05a6-4541-a50b-90e0e0b097dan%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/neonixie-l/603ee847-05a6-4541-a50b-90e0e0b097dan%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- 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 on the web, visit https://groups.google.com/d/msgid/neonixie-l/9a8ca493-58e1-49bb-b0a7-70be04adf129n%40googlegroups.com.
