Just noticed that the Vintage Power transformer that i harvested from an old Tube PA amp that i want to use for my JCM build, doesn't have a center tap on the B+ windings.
That being said, can I just connect the windings to the middle of the 4 diodes, then ground the ends to make a bridge rectifier? instead of the 2 phase Full wave?
JCM800 With Bridge Rectifier
Moderators: pompeiisneaks, Colossal
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pleasantbullet
- Posts: 65
- Joined: Tue Jun 05, 2012 6:19 pm
- Location: Ontario, Canada
Re: JCM800 With Bridge Rectifier
Yes you can!
But...you may not get the B+ voltage that you originally sought with a full wave, CT approach.
What is the un-loaded AC voltage across the secondary?
Cheers,
Dave O.
But...you may not get the B+ voltage that you originally sought with a full wave, CT approach.
What is the un-loaded AC voltage across the secondary?
Cheers,
Dave O.
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pleasantbullet
- Posts: 65
- Joined: Tue Jun 05, 2012 6:19 pm
- Location: Ontario, Canada
Re: JCM800 With Bridge Rectifier
I measured 400 volts AC.
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pleasantbullet
- Posts: 65
- Joined: Tue Jun 05, 2012 6:19 pm
- Location: Ontario, Canada
Re: JCM800 With Bridge Rectifier
now that i think of this in more detail
400 VAC @ approximately 1.3 times is 520V, should i consider adding a power resistor to knock that down some?
If so, what size should it be and how many watts should it be rated for?
400 VAC @ approximately 1.3 times is 520V, should i consider adding a power resistor to knock that down some?
If so, what size should it be and how many watts should it be rated for?
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Stevem
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Re: JCM800 With Bridge Rectifier
You might change those rectos out for a fast recovery type which will take noise hash out of the power supply which is what you are listening to all along any way!
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
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Stevem
- Posts: 5144
- Joined: Fri Jan 24, 2014 3:01 pm
- Location: 1/3rd the way out one of the arms of the Milkyway.
Re: JCM800 With Bridge Rectifier
]You might change those rectos out for a fast recovery type which will take noise hash out of the power supply which is what you are listening to all along any way, the power supply!
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!