simple stuff but not for me

[user 137017]

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.

 

[rock soderstrom]

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.

 

[user 137017]

thanks for the input. using a voltage doubler on the unused winding is a good idea.

 

[gyraf]

Perhaps a tube based meter: https://www.aliexpress.com/item/4001295557179.html

/Jakob E.

 

[user 137017]

thats a hell of a good price for a lot of sexy tubes

 

[NoisyIndividual]

So buy one, and let us know what turns up.

 

[user 137017]

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]

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

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.

 

[user 137017]

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

 

[user 137017]

So buy one, and let us know what turns up.

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.

 

[user 137017]

Perhaps a tube based meter: https://www.aliexpress.com/item/4001295557179.html

/Jakob E.

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

 

[gyraf]

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..