im a mechanical engineer not a wire man or circuit builder and my undersanding of semi conductors is very limitef, so i would be greatfull for some help. i hope to fit a simple one led peak level indicator on a tube amp. i have the standard 6.3ac, a 280dc and an unused 6.3 winding (about 7ac unloaded) i want to install the level indicator after the first stage. could any of the members here please surgest a simple cicuit that would fit the bill. if it could run a bicolour led that wuld be really neat. again folks thanks for any info.
simple stuff but not for me
- Thread starter KIDVOX
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rock soderstrom
Tour de France
Hi, check this thread with some useful info.
https://groupdiy.com/threads/mixer-internal-level-indicator.75739/#post-961181
For PSU I would use the unused 6.3V winding with a voltage doubler and a cheap regulator. If needed, generate bipolar voltages with a virtual ground.
https://groupdiy.com/threads/mixer-internal-level-indicator.75739/#post-961181
For PSU I would use the unused 6.3V winding with a voltage doubler and a cheap regulator. If needed, generate bipolar voltages with a virtual ground.
Last edited:
NoisyIndividual
Well-known member
So buy one, and let us know what turns up.
i want to keep this simple. ive just ordered a 5 led vu from china. i have a few 3 colour leds in the parts bins. so going to use the pcb connected to just the multi colour led. i did seriosly think about the floro tubes but but i want a simple solution . ill post again when its been tested
rock soderstrom
Tour de France
Do you have a link for this LED VU meter? Please briefly describe your experiences with the part after installation, I might need something like that in the future.
im not too good at pasting links on a moby but item number is 134611797731 ive used them in the past and never had a problem the handy thing is the operating voltage is amost any thing DC, so its a voltage doubler on the 6.3 . i did a search for "led vu" and these popped up £3 uk about $4 us
ive got a 100w tube sereo slave to build in a couple of months so ill get one of these kits for that job. as thats for a hifi job raher than a guitar rack i think the flouro ubes will look sexy in that.
funny how the price inceased when i had aded to cart. then there was tax to add. ive seen similar on fleabay so ill check them there but they still look nice
There's many sellers for these at AEX, just find the decent-priced one. And make sure what you order, many of these are with or without step-up HT power converters and such..
