500 series Gyraf G9

[peter purpose]

I've heard nothing but good about Jakob's G9, so I thought I'd try to make a 500 series version.
I've dropped the line option and have only one HPF setting.
I haven't fired it up yet, but will let you know if it works as well as it is supposed to.

 

[mich]

Master Squeezer..

 

[gemini86]

aaaaawwwwwww....crap. I've been working on this for like, 3 months...

Goes to show how slow I am. Oh well, at least I can still build for me.

What are you using for boost converter chip? looks like a stripped down version of the 555 or maxim circuit floating the interwebs...

 

[gemini86]

Oh, and I also did the HPF and LINE options using the typical dpdt/spdt mountain/ck switched, but the on-off-on ones. Something to think about, lot's o people use these for bus coloration.

 

[peter purpose]

Rodney,
Don't let this stop you doing your own version.... the more, the merrier I say.
I'm not planning on releasing it as a kit without permission from Jakob, if at all.
This is more of a 'see if I could do it' sort of thing.

MC34063 for the boost.

 

[[silent:arts]]

since I'm working on an (G9 unrelated) tube unit (with only one tube):
power consumption?

while the high voltage is the easier part, how did you manage the heaters?

 

[deuc224]

Trim? Or am i blind?

 

[peter purpose]

Not fired up yet, but anticipate 350mA ish. Way over spec, but who cares.
12V for the heaters from the dc-dc converter (running from both rails), or a slow start regulator pulling just the positive rail.

 

[peter purpose]

Trim? Or am i blind?

Half past three.

 

[deuc224]

Trim? Or am i blind?

Half past three.

wow guess i am blind :-[

 

[peterc]

Looks frikkin spectacular!

I'm sure you have thought about it, but any reason for not running the heaters at 12v in series?

"Only" draws 150mA....

 

[[silent:arts]]

Not fired up yet, but anticipate 350mA ish. Way over spec, but who cares.
12V for the heaters from the dc-dc converter (running from both rails), or a slow start regulator pulling just the positive rail.

cool, thanks.
who cares?
not me.
I remember a discussion about oversized 511 Rack PSU transformers today.
But I remember the discussion for the specs of it here in the forum too ;D

 

[peter purpose]

Looks frikkin spectacular!

I'm sure you have thought about it, but any reason for not running the heaters at 12v in series?

"Only" draws 150mA....

I had no idea Peter... thanks for the tip.

 

[deuc224]

ill be the first to say it then.

Im in for 1 maybe to kits ;D

 

[sahib]

Great stuff Peter.

May I humbly suggest to cut out apertures on the PCB where the valves are.

 

[shabtek]

what is the part# for the valve sockets

 

[peter purpose]

May I humbly suggest to cut out apertures on the PCB where the valves are.

There are quite a few resistors under them, so not really viable.
Besides, they are a few mm off the board and can be more.

 

[peter purpose]

what is the part# for the valve sockets

Common or garden sockets for 1mm pins.

 

[gemini86]

So basically the pcb IS the socket... nice.

Sorry for sounding bitter in my earlier posts... I was on my (crappy 1st gen android) phone. I love your work, Peter. Well done. I'll still build mine, there are quite a few differences. I would have beat you to it if I hadn't had to pay for my wife's dental work lest month

 

[chrispbass]

Very nice Peter, almost as nice and compact as the original I've just finished building!!!
    :'(  :  ;D