# \#4710 safety valve **URL:** \ **Category:** KOSMO MODULES\ **Created:** [January 26, 2021, 11:52am UTC](https://lookmumnocomputer.discourse.group/t/4710-safety-valve/2789 "2021-01-26T11:52:21Z")\ **Posts on this page:** 1\ **Showing post:** 50
**Author:** ![lookmumnocomputer](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/lookmumnocomputer/32/23_2.png) [@lookmumnocomputer](https://lookmumnocomputer.discourse.group/u/lookmumnocomputer)\ **Post date:** [March 28, 2021, 3:51pm UTC](https://lookmumnocomputer.discourse.group/t/4710-safety-valve/2789/50 "2021-03-28T15:51:30Z")
to be honest with this module, and this valve the heater filament is actually 6.3VAC which isn’t available in just a modular power connection. so 12v DC seemed quite fitting bearing in mind its a full wave. -12v generally has less current consumption so figured to pop the heater on that side of the power supply. however I found when I built this module the first time without a resistor is generated a bit of hum in other modules, a try 27r resistor eradicated the issue. I was going too improve this to get more glow out of the tube itself in this iteration but after fiddling with the circuit in January I wasn’t happy how it was turning out with the mods I was doing to it, so I made the decision to basically make it exactly the same as the one I had in my modular I was looking to replace. its not the right way of doing it but it works, and I can show for a module that was used nearly daily for about 2 and a half 3 years and still works fine doing its thing I figured its fine. --- _[View the full topic](https://lookmumnocomputer.discourse.group/t/4710-safety-valve/2789)._