DEMO Tube build - BlackVibe!!!

[Dan0h]

Nice build, I like it.
I've build JCM800 pre in a pedal form, powered by SMPS (555 based. I can dial up to 320-340V).

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Is it just changing values on the HV board to get higher V out of it? Did you use Kingsley for reference on this build? It looks awesome. Nice touch on the gold sockets too!

Edit* I think I found the answer. If you feed higher dc in higher comes out. I use 9v and get up to 250v so 12-18v should bump that up I’ll try it out.

 

[temol]

Edit* I think I found the answer. If you feed higher dc in higher comes out. I use 9v and get up to 250v so 12-18v should bump that up I’ll try it out.

Yeah, it's Kingsley inspired. But 1:1 JCM800 pre copy. I power it with 12V. Check voltage ratings of the capacitors first . The voltage may increase by 10 % at startup.

 

[Vurguuz]

Hi @Dan0h , the demo sounds awesome. What kind of amp are you running into?

 

[Dan0h]

Hi @Dan0h , the demo sounds awesome. What kind of amp are you running into?

Thanks. It’s a Fender Super Champ x2 that I built a walnut cab for with a 12” Jensen. The demo was just setting my iPhone on the floor in front of the amp. This amp has solid state pre and tube power section but takes pedals really well.

 

[Snicksound]

Thanks to @PedalPCB for gifting me one of the ProtoBoards and the HV board.

Wait... PedalPCB has a HV board? Where does one procure that? I need that!

 

[coltonius]

Wait... PedalPCB has a HV board? Where does one procure that? I need that!

Same! Is this going to be a regular offering, @Robert ? And if not, can it please be?

 

[Dan0h]

@Snicksound & @coltonius if you dig through old posts you will find that the HV board idea sprouted a few years ago. I’m not sure why it never took off, might be too niche and you have to consider the safety issues around it. I for one am a huge fan of being able to power tubes in a pedal.

Should have this second build wrapped up soon. Just a dry fit in the photo.

 

[coltonius]

@Snicksound & @coltonius if you dig through old posts you will find that the HV board idea sprouted a few years ago. I’m not sure why it never took off, might be too niche and you have to consider the safety issues around it. I for one am a huge fan of being able to power tubes in a pedal.

Should have this second build wrapped up soon. Just a dry fit in the photo.
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Yes, I can see how that could be a liability if someone used to working with 9-18v got zapped while using one! I know Frog Pedals sells some boards.. I saw that Sushi does too.

I built a 5C3 Deluxe for a friend, and he was asking me the other day whether it's possible to recreate the preamp in a pedal format. Octals would be a tight/impossible squeeze (at least on the inside of an enclosure), but tube preamps in general seem like a fun idea to pursue!

ps. Love your builds! A JCM800 in a pedal would be awesome!

 

[Vurguuz]

@Dan0h so how does your blackvibe take pedals in front of it? Any peculiarities that you may have noticed?

 

[Dan0h]

@Dan0h so how does your blackvibe take pedals in front of it? Any peculiarities that you may have noticed?

It reacts the same way my old amp does. The high input sounds like garbage when other pedals are in front of it but the low input sounds perfectly fine. The low has an extra 1Meg dropping resistor on it. The high is straight into the 68k grid resistor.
I like using the high input so I have it as the first pedal on my board and couldn’t be happier with it.