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Blue Hawaii BJT Build thread

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sorry,  30Volt

Edit : I´m using 6CA7 :wub:

Edited by jose

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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 by Blueman2

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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.

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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

P1030838.JPG

P1030815.JPG

P1030826.JPG

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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

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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)!


Sent from my iPhone using Tapatalk

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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!

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

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

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

 

TVV_9560-1800_logo-MK.jpg

Edited by jose

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

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BTW, are those EL34s Tung Sols?  

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

Edited by Blueman2

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Beaut build   :wub:

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

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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?

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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)!


Sent from my iPhone using Tapatalk

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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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?

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