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Garage sale find: pics - what is current and secondary voltage???
Garage sale find: pics - what is current and secondary voltage???
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Old 5th November 2017, 09:39 PM   #11
HollowState is offline HollowState  United States
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Quote:
Originally Posted by elguapo511 View Post
What is the current and secondary voltage based on the details in the “everything I need to know section”
It's listed right there in the rating column of the Sam's photofact parts list.
(740V @ 150mA, 5V @3A, 6.3V @ 4A & 6.3V @ 1A)
The part numbers of the recommended replacement power transformers are long out of production. The Chicago was a potted unit, the Stancore is not. You'll most likely need one from Hammon or Edcor. Or you might find one on eBay as well.

Quote:
Originally Posted by elguapo511 View Post
I read him that info and it did not seem to help.
If you read him those numbers and they didn't understand, then your "tech" is no good. Time to find a new one.

Important! Do not spend a nickel on this amplifier until you verify the output transformer is good. Check for continuity and shorts to the core and secondary, This is best done by hypot testing with at least 500 volts DC. Lacking that, a multimeter is better then nothing. However it will not detect any leakage like a hypot will.
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Old 6th November 2017, 03:05 AM   #12
elguapo511 is offline elguapo511  United States
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Howdy folks.... do me a solid and just spell it out for me,

I didnít know much about Pizza and now I do.

What is the current ?

What is the secondary voltage?
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Old 6th November 2017, 05:30 AM   #13
pelayostyle is offline pelayostyle  United States
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Garage sale find: pics - what is current and secondary voltage???
Quote:
Originally Posted by elguapo511 View Post
Howdy folks.... do me a solid and just spell it out for me,

I didn’t know much about Pizza and now I do.

What is the current ?

What is the secondary voltage?
C'mon man, this is the third or fourth time....

740V @ 150mA, 5V @3A, 6.3V @ 4A & 6.3V @ 1A

Blue is the Secondary Voltage(s), Red is Current. That's all you need to know.
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Old 6th November 2017, 08:51 AM   #14
Ketje is offline Ketje  Belgium
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Don't forget the "CT" center tap !
Mona
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Old 6th November 2017, 10:41 AM   #15
martyh is offline martyh  United States
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PCC 150 or PSC 150 chicago come up on ebay. Either one will bolt right up.

By "bolt right up" I mean fit, look and work the same but it is not something you should try on your own. As others have pointed out, the voltages involved here can kill you.

Last edited by martyh; 6th November 2017 at 11:07 AM.
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Old 6th November 2017, 04:41 PM   #16
Alllensoncanon is offline Alllensoncanon  United States
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Garage sale find: pics - what is current and secondary voltage???
One important thing you need to know is "How did the power transformer died in the first place". You likely will see the same firework if you did not correct it before applying full AC power to the amp. The 2nd thing you should know from the pictures is that the power tube has been changed to a more powerful KT66 from the specified 6L6GA. They are somewhat interchangeable. The KT66 drawn more filament current than the 6L6GA. Looking at the power transformer spec, it should handle the KT66 filament current. The KT66 also can handle more high voltage current, but should things go wrong can do more damages to things that are in its path.
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Old 6th November 2017, 11:46 PM   #17
Refugee1 is offline Refugee1  United Kingdom
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Does the transformer look burned?
If not the engineer may well have just not wanted to look at it so gave a fault that would make you take it away.
Get a an ohms meter and measure all the windings and report the readings back ti us.
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Old 8th November 2017, 03:41 PM   #18
elguapo511 is offline elguapo511  United States
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It did not look burned, but seemed to have more paint worn than the other.
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Old 8th November 2017, 03:43 PM   #19
elguapo511 is offline elguapo511  United States
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here are the full higher res details...

womp.... pdf too large.

Last edited by elguapo511; 8th November 2017 at 03:52 PM.
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Old 8th November 2017, 04:28 PM   #20
kevinkr is offline kevinkr  United States
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Garage sale find: pics - what is current and secondary voltage???
Quote:
Originally Posted by elguapo511 View Post
I read him that info and it did not seem to help.
Absolutely everything he needs to know is there, if that's insufficient then you absolutely need to find someone else to work on it.
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