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Need help about El84 Powered “Vibrolux “ copy errors.

Posted: Wed 06/09/21 4:56 am
by kryfcn
Hi there amp experts , masters. Im working on my Vibrolux copy powered by El84’s. It is an amp 80’s local made. No scheme unfortunately, so i tried to drew as it is .I dont know how to draw by a software eighter. Sorry about my painting skills 🙂 Hope it work for me to get your precious tips.
My questions :
1) Filter caps swapped with newer versions by bad workmanship. Incorrect values too. I ripped them off. At least , old can caps stayed on the amp so i can see the original values . One 50+50 uf can cap and two pair of 20+20.

2) The right lug of the intensity pot was on Filter cap i found. Is that right place to be ? Or ground? I drew as it is going to ground here.

3) Is there any right place to be for that Blue cable which is going to speaker socket lug ?

4) Is there any similar amp design to follow?

5) Please tell me if you see any error there.

Thank you everybody for your precious time.

Re: Need helps about El84 Powered “Vibrolux “ copy errors.

Posted: Wed 06/09/21 6:27 am
by Bieworm
Are there issues?
Better start comparing your build to a vibrolux schematic and write down the differences in component values and try to analyze why they're different

Re: Need helps about El84 Powered “Vibrolux “ copy errors.

Posted: Wed 06/09/21 11:16 am
by kryfcn
Thank you Bieworm.

Re: Need helps about El84 Powered “Vibrolux “ copy errors.

Posted: Wed 06/09/21 11:23 am
by Bieworm
kryfcn wrote:
Wed 06/09/21 11:16 am
Thank you Bieworm.
EL84 on a vibrolux... very curious about some kind of Vibrobrit!!! 😉

Re: Need help about El84 Powered “Vibrolux “ copy errors.

Posted: Thu 06/10/21 10:09 pm
by kryfcn
I will try to draw it by a software so i can share with the people here. Filter caps are butchered on the amp . There is original Caps stayed on the amp.So I know the values but i need to find a design that would match with this Amp .

Re: Need helps about El84 Powered “Vibrolux “ copy errors.

Posted: Mon 06/21/21 7:08 pm
by zaphod_phil
Bieworm wrote:
Wed 06/09/21 11:23 am

EL84 on a vibrolux... very curious about some kind of Vibrobrit!!! 😉
Then just call them 6BQ5s, to keep it all looking American :lol: