Blue Hawaii BJT Build thread

[jose]

sorry,  30Volt

Edit : I´m using 6CA7 

Edited February 1, 2018 by jose

[Blueman2]

I have been hearing nothing but good things about true (beam tetrode) 6CA7s.  Might have to give them a try sometime.  I like the Tung Sol EL34Bs (pentode I think) I am using, however.  

Edited February 1, 2018 by Blueman2

[JoaMat]

Of course offset servo is not needed with the Blue Hawaii. Blue Hawaii has been around for a long time. Manufactured and sold by HeadAmp Audio Electronics to many satisfied customers. Been given highest possible remarks by professional tester.

 

As DIYer I do feel entitled to do any modifications to any amplifier I like. Doing so with a Blue Hawaii feels like a privilege. I’m very grateful for the Blue Hawaii and can’t thank you the designer enough.

[headinclouds]

I finally built my Blue Hawaii - a single box KG 2015 which uses the mosfets, (but I will build the BJT boards too).  All GR supplies.  I was inspired by a Triumph Rocket motorcycle for the chrome trim and I wanted volume indication in the dark so it has a circle of leds and a delayed pointer off the heater warm up.

While I was working all this out Kevin published the Grounded Grid so I am building one of those in a similar case.

Looking forward to some extended listening now.  Thanks Kevin for a great design

[Laowei]

A jaw dropper. Stunning build, Geoff! 

[Kerry]

Really nice!  Congrats 

[Kung]

nicely done ！

[kevin gilmore]

absolutely stunning, but I think the triumph would be a lot more fun, too bad i'm way past my prime to ride something like that. more than 20 years since the K100RT

[Pars]

Very nice. I had a similar thought to the circle of LEDs for the case I’m laying out for the DynaFet. Nice on the pointer LED (as well as the rest of it)!


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[JoaMat]

Very nice indeed! Like them Blue (Hawaii) lights.

[headinclouds]

Yes they had to be blue, didn't they.  Thank you for your comments. Kevin came up with a brilliant name for the Blue Hawaii -it has a certain glamorous connotation - well especially for those of us living in dull rainy places!

[Blueman2]

That is a work of art.  Congratulations!!!!  So many great ideas and touches, I want to steal them all! 

[jose]

very nice!!!! I like leds around the volume. 

Edit: ... but I prefer K100RT café race too. 

 

Edited April 10, 2018 by jose

[SeaWolf]

Looks really good. The chrome things over the tubes and the transformer make it look like something out of 1950s sci-fi !

[Blueman2]

BTW, are those EL34s Tung Sols?  

Edit: I see in the reflection they are  Svetlana's.  Great picture!

Edited April 10, 2018 by Blueman2

[Whitigir]

Nice, congratulation! I am drooling over that chassis ! Woooohhh

[wink]

Beaut build  

The only criticism I can offer is that the volume control doesn't go to 11........ 

[jose]

How do you put the led on the volume knob?

[penmarker]

6 minutes ago, jose said:

How do you put the led on the volume knob?

[headinclouds]

Haha,  How did you get my photo?

It’s not a led. I am thinking of other ways to do it.  

 

[jose]

37 minutes ago, headinclouds said:

Haha,  How did you get my photo?

It’s not a led. I am thinking of other ways to do it.  

 

Is the knob already assembled?

[Pars]

Very nice. I had a similar thought to the circle of LEDs for the case I’m laying out for the DynaFet. Nice on the pointer LED (as well as the rest of it)!


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My actual thought on this was to try to make the LEDs track the volume knob, much like a Pass Aleph P. The problem is I am using a TKD pot and not a relay based volume control in this, so barring an extra pot deck I can’t think of any way to do this. Maybe I’m missing something?

And the green pointer on yours isn’t an LED?


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[headinclouds]

Yes I pondered on various ways of doing this.  And if you want any electronics in the knob you have to get the supply in to it. I could do it but it’s not good.  This uses a fixed light source. How would you do it?

[JimL]

Wow, way cool!

[purk]

So pretty!