Need help about El84 Powered “Vibrolux “ copy errors.

Forum to discuss amp circuits besides the 18 Watters and their ilk.

Moderators: JMPGuitars, CurtissRobin, colossal, zaphod_phil, Daviedawg, Graydon

Post Reply
kryfcn
Unrated
Posts: 3
Joined: Mon 06/07/21 4:57 pm

Need help about El84 Powered “Vibrolux “ copy errors.

Post 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.
You do not have the required permissions to view the files attached to this post.
Last edited by kryfcn on Thu 06/10/21 10:00 pm, edited 1 time in total.
0 x

User avatar
Bieworm
Verbose Wizard of Oz
Verbose Wizard of Oz
Posts: 1474
Joined: Mon 02/10/20 8:24 am
Location: Belgium

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

Post 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
1 x
"THIS should be played at high volume..preferably in a residential area"

kryfcn
Unrated
Posts: 3
Joined: Mon 06/07/21 4:57 pm

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

Post by kryfcn »

Thank you Bieworm.
0 x

User avatar
Bieworm
Verbose Wizard of Oz
Verbose Wizard of Oz
Posts: 1474
Joined: Mon 02/10/20 8:24 am
Location: Belgium

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

Post 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!!! 😉
0 x
"THIS should be played at high volume..preferably in a residential area"

kryfcn
Unrated
Posts: 3
Joined: Mon 06/07/21 4:57 pm

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

Post 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 .
0 x

User avatar
zaphod_phil
Builder, Admin
Builder, Admin
Posts: 15105
Joined: Wed 03/19/03 2:00 am
Location: YYZ

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

Post 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:
2 x
Nature abhors a clean tube amp

Post Reply