Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Planobilly on September 26, 2016, 10:36:15 am

Title: Recommendations for a EL84 based amp build
Post by: Planobilly on September 26, 2016, 10:36:15 am

Hi guys,

The Hoffman AB763 amp I have finished went well. I now would like to build a EL84 based amp.

What I really wanted was to build a turret board style amp like a Zinky Blue Velvet. I have never been able to find a schematic of that amp. I guess I could call Bruce Zinky to see if one exist. I am not sure what he would have to say. I use to have one but I never took it apart.

Has anyone here ever played a Blue Velvet and if so can you recommend something similar?

Thanks,

Billy

Title: Re: Recommendations for a EL84 based amp build
Post by: shooter on September 26, 2016, 01:59:41 pm

fwiw, not a Zinky;
find your favorite '84 pa, and well, adjust as needed :dontknow:

Title: Re: Recommendations for a EL84 based amp build
Post by: NEjoe on September 27, 2016, 12:41:18 pm

Never played a blue velvet amp.


Are they single ended or push-pull?

Title: Re: Recommendations for a EL84 based amp build
Post by: PRR on September 27, 2016, 02:16:39 pm

> not a Zinky

I really suspect that is a Hi-Fi line amp, not a geetar amp fragment.

"Blue Velvet" can mean different things to different people.

Title: Re: Recommendations for a EL84 based amp build
Post by: labb on September 27, 2016, 02:48:28 pm

https://www.youtube.com/watch?v=JSQKGUb_mKc (https://www.youtube.com/watch?v=JSQKGUb_mKc)

Title: Re: Recommendations for a EL84 based amp build
Post by: shooter on September 27, 2016, 02:51:07 pm

Quote

suspect that is a Hi-Fi line amp

You might/are correct, like K I hoard novel schematics, knew I had velvet, and looking a second time I did file it under hifi, my out

Quote

adjust as needed

:icon_biggrin:
2amps back, I did use similar architecture 6SN7, it made it to the public domain 4guitar

Title: Re: Recommendations for a EL84 based amp build
Post by: Planobilly on October 01, 2016, 12:37:30 am

Hi,

Bruce Zinky was a designer working for Fender who designed the Prosonic as a custom shop project. He is now the owner or part owner of the Supro line of amps.

I have read that the  new Supro Dual Tone is the same as a Blue Velvet but I am sure that is not true. A Blue Velvet has tube reverb and the new Supro does not. The Blue Velvet uses two EL84 tubes and the Supro uses 6973 tubes.

I have ask a lot of people about a schematic and done a good bit of searching with no results. I also have not seen any of the new Supro schematics.

I may not find a schematic but I can buy the amp used for around $800....pretty pricey way to get a schematic....lol

Cheers,

Billy

Title: Re: Recommendations for a EL84 based amp build
Post by: VMS on October 01, 2016, 02:17:59 am

Quote from: Planobilly on October 01, 2016, 12:37:30 am

I have read that the  new Supro Dual Tone is the same as a Blue Velvet but I am sure that is not true. A Blue Velvet has tube reverb and the new Supro does not. The Blue Velvet uses two EL84 tubes and the Supro uses 6973 tubes.

It's not the new 1624T dual-tone which I think is a reissue of an old supro. But I believe those Blue velvets were made under supro name for a while:

https://reverb.com/item/405990-zinky-blue-velvet-supro-dualtone-2011-black (https://reverb.com/item/405990-zinky-blue-velvet-supro-dualtone-2011-black)

https://reverb.com/fi/item/2859424-supro-1624t-dual-tone-1x12-combo (https://reverb.com/fi/item/2859424-supro-1624t-dual-tone-1x12-combo)