Project Carvin V-16: Morphing from PCB to Point To Point Turret Board

ivan H said:
Ok Sysco, I've just received notification that the order has been delivered so I'll take an early lunch break to fly home & then get to the post office & send to you. That way it'll be on its way this afternoon rather than sit there overnight. I'll PM you details when sent. Cheers
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You are very generous with your time. Instead of mailing the parts to me, why don't you hop on a jet and personally deliver them to me. I'll buy you some lunch and all the beer you can drink... :cheers:

Seriously though... I really appreciate you and ChasFred for going over and beyond in helping me to get thru this project.

Also a big thanks to everybody else that has contributed to this thread. There's a long way to go... :victoire:

The parts order from Mouser and Tube Depot came in yesterday. Parts from AES and Valvestorm are scheduled to arrive later today. And the chassis should arrive in four more days, next Monday.
 
67plexi said:
This is a rare bird Dumble Manzamp GZ34 EL34 4 x 10" Redwood plywood cabinet Sprague 6PS capacitors and Draloric resistors
Redwood has a great mid-range resonance

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I'm not surprised that this sounds really good. I was hoping to see some nice closeups of the circuitry... :osnap:
 
Question on filtering the power supply, or the B+:
The first stage filtering cap's original value is 82uF. Nine years ago, when I recapped all the filter caps, I changed this cap to 100uF. Is there a point where "more is too much"?
 
syscokid said:
Is there a point where "more is too much"?
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The filter places a load on the power transformer, & especially so at power up where the filter appears to the power transformer almost as a dead short for a split second. Going from the design value of 82uf to the 100uf that you have there now isn't going to present any problem, but as Chas said, yes, going "too" large definitely can damage the power transformer/rectifier by drawing too much current.
A 100uf filter/reservior supplying two EL84's makes for a pretty stiff power supply, you're not going to need any more.
Thanks for the offer of lunch & beers. If I didn't have commitments here I'd take you up on that. Cheers
 
ChasFred said:
without getting into the theory of it all, short answer is YES. You are good with the 100uF I would say.
Once you have your turret board layout, please make a template of it. I may do the same thing to my son's amp.
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I wanted to use (Doug) Hoffman's Custom Board service at: https://hoffmanamps.com/MyStore/perlshop.cgi?ACTION=enter&thispage=CustomBoard.htm&ORDER_ID=!ORDERID!
Here's what I was going to attempt originally to fit the original Carvin chassis:

V16 Board Template Layout_Page_1.jpg

From zero to 49 is 12 1/4"

More than likely, from #30 to #49 will be revamped a little differently and on a separate board... maybe... :hmmm:
 
syscokid said:
I wanted to use (Doug) Hoffman's Custom Board service at: https://hoffmanamps.com/MyStore/perlshop.cgi?ACTION=enter&thispage=CustomBoard.htm&ORDER_ID=!ORDERID!
Here's what I was going to attempt originally to fit the original Carvin chassis:

View attachment 33154

From zero to 49 is 12 1/4"

More than likely, from #30 to #49 will be revamped a little differently and on a separate board... maybe... :hmmm:
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Cool layout. Try to space that 350r/10W resistor from other components as much as possible, just to avoid heat soak. Cheers
 
syscokid said:
The Seeds have been planted...

View attachment 33193


Nothing has been soldered. Turrets are not set into the board. Cardboard represents chassis. Pennies are the same size of the 9-pin sockets, 3/4"!

Two more days for the chassis to arrive... :popcorn:
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1571605009892.png
Wrapping my head around this.... Basically I need to see it closer up. I tried to zoom in 200% but it is still not super clear to me.
 
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Got it. Will be back home tomorrow and will be able to give it a proper look over then. Hard to see it good on my phone.
 
syscokid said:
Chassis came in today... :woohoo:

Looks and feels like a very nice aluminum chassis:
View attachment 33247

View attachment 33248


The four big orange .1uF caps were sitting less than 1/16" above the chassis' top surface level. So I came up with the "Low Rider" adjustment:
View attachment 33249
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Excellent, I see some fancy lead bending work on a few of those caps also. Very slick looking.
only one problem now.

You have me rethinking my project. I am thinking of pulling out my eyelet board and installing a turret board also.
 
ChasFred said:
Excellent, I see some fancy lead bending work on a few of those caps also. Very slick looking.
only one problem now.

You have me rethinking my project. I am thinking of pulling out my eyelet board and installing a turret board also.
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Eyelet boards are cool too. Why do you want to switch to a turret style board?
 
syscokid said:
Eyelet boards are cool too. Why do you want to switch to a turret style board?
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The eyelet board is made of Black compressed paper basicly, where the turret board will be a fiberglass G-10 board.
They are a lot more stable. And because I can and they look better I think. I will add extra turrets as test points also.
 
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