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-   -   Garage sale find: pics - what is current and secondary voltage??? (http://www.diyaudio.com/forums/tubes-valves/314432-garage-sale-pics-current-secondary-voltage.html)

elguapo511 5th November 2017 07:39 PM

Garage sale find: pics - what is current and secondary voltage???
 
Hey all, cool forum.

I Found what I believe is a mono tube amp.

I took it to get fixed and the very smart repairman said the power transformer is dead.

He could not try to fix or replace it without knowing the “ current and secondary voltage” of the power transformer.

So.... how do I figure out the missing info...

The company is called waveforms. And there is little information out there.

I have attached the schematics . Is that info on there?

It also came with some seriously large tubes.

Please help me get smart if you can.

Thanks!

planet10 5th November 2017 07:58 PM

Schematic?

dave

elguapo511 5th November 2017 08:26 PM

5 Attachment(s)
It came with some great tubes too, I think.

This thing also came with a pre amp that I am looking for...

kodabmx 5th November 2017 08:36 PM

In the second pic under the heading "TRANSFORMER (POWER)" it shows you everything you need to know.
740VCT@150ma, 5V@3A, 6.3V@4A, 6.3V@1A

cowboy99 5th November 2017 08:38 PM

I just pleaded with new member 'Woops' about lacking of knowledge with tube circuit.
OK Dave, How do you convey the best 'get smart' advice to a someone lacking knowledge of unknown tube circuit ?

Hope your feeling better each day
Charles

HollowState 5th November 2017 08:42 PM

Quote:

Originally Posted by elguapo511 (http://www.diyaudio.com/forums/tubes-valves/314432-garage-sale-pics-current-secondary-voltage-post5235066.html#post5235066)
I have attached the schematics . Is that info on there?

All the information is on the Sam's parts list. Did your tech not see it? Second picture (transformer power)
Ok, just got beat by kodabmx.

elguapo511 5th November 2017 08:42 PM

I thought so...and thanks

But

What is the current and secondary voltage based on the details in the “everything I need to know section”

Every moment can be a brain building moment... is what my infant tells me.

elguapo511 5th November 2017 08:43 PM

I read him that info and it did not seem to help.

planet10 5th November 2017 08:43 PM

Quote:

OK Dave, How do you convey the best 'get smart' advice to a someone lacking knowledge of unknown tube circuit ?
I’m not sure. 700+ Volts on the transformer is into really scary territory, a place where only those well versed in working with high voltage should venture, it is certainly enuff to kill you.

Thanx for asking… i continue to improve. Am now hobbling about with just a cane, 2nd round of physio is over in a month, but i’ll still have a ways to go.

dave

Ketje 5th November 2017 08:58 PM

Quote:

Originally Posted by planet10 (http://www.diyaudio.com/forums/tubes-valves/314432-garage-sale-pics-current-secondary-voltage-post5235150.html#post5235150)
Iím not sure. 700+ Volts on the transformer is into really scary territory, a place where only those well versed in working with high voltage should venture, it is certainly enuff to kill you.

Well, call it two times 370V @ 150mA sounds less scary but the same thing :D
Mona


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