AudioRoundTable.com: Group Build » 5V CT rectifier hookup

Home » Audio » Group Build » 5V CT rectifier hookup - help

Show: Today's Messages :: Navigator :: Polls
E-mail to friend

5V CT rectifier hookup - help [message #30679]

Fri, 25 February 2005 11:58

colinhester
Messages: 1349
Registered: May 2009
Location: NE Arkansas

Illuminati (3rd Degree)

The Heyboer Tx we have has a 5V CT for the rectifier's heater. When hooking this up, is it one leg of the 5V and the CT (ie 5-0 of the 5-0-5 winding)? The second leg is not used, correct?......Colin

Report message to a moderator

Re: 5V CT rectifier hookup - help [message #30681 is a reply to message #30679]

Fri, 25 February 2005 12:56

Manualblock
Messages: 4973
Registered: May 2009

Illuminati (13th Degree)

Good thing you asked because I thought the CT goes to ground and each leg goes to one side of the filament for the 6CA4. Maybe we can conference call Douglas; losing Damir was a blow, it was good to have two people to ask in case one was busy.
My question is how did you wire up the AC primary of the seperate RS filament transformer? Did you take two seperate lines from the IEC? One for the power trans and one for the RS trans?

Report message to a moderator

Re: 5V CT rectifier hookup - help [message #30682 is a reply to message #30681]

Fri, 25 February 2005 13:18

cheetah
Messages: 70
Registered: May 2009

Viscount

For rectifier heaters, the center tap is connected to the LC power supply filter. The ends of the transformer connect to the filament pins.

Joe

Report message to a moderator

Re: 5V CT rectifier hookup - help [message #30683 is a reply to message #30682]

Fri, 25 February 2005 13:44

colinhester
Messages: 1349
Registered: May 2009
Location: NE Arkansas

Illuminati (3rd Degree)

So, both center taps, one from the HV and one from the 5V, are both connected to the (-) of the capacitor. Correct?.....Colin

Report message to a moderator

Re: 5V CT rectifier hookup - help [message #30684 is a reply to message #30679]

Fri, 25 February 2005 13:47

Forty2wo
Messages: 163
Registered: May 2009

Master

The 2 yellow are for the rectfier heater. for now don't hook the CT( Y/W) to anything. for a normal full wave rectfier you do not need to ct the heater. Let me know what rectifer you are useing as as to what pin to take power from.
I am working day and night at the mines. I am sure Douglas will answer if I can't get back to you...John

PS. I did get the CCS wired up will try to post a pic when I can

Report message to a moderator

Re: 5V CT rectifier hookup - help [message #30685 is a reply to message #30683]

Fri, 25 February 2005 14:14

cheetah
Messages: 70
Registered: May 2009

Viscount

Heater center tap tp cap (+), HV center tap to cap (-).

Joe

Report message to a moderator

Re: 5V CT rectifier hookup - help [message #30687 is a reply to message #30683]

Fri, 25 February 2005 14:28

cheetah
Messages: 70
Registered: May 2009

Viscount

Looked at several schematics.

If using a indirectly heated rectifier (5AR4), you can either tie the heater center tap to the cathode which is connected to the (+) side of the filter. OR, you can omit the center tap connection all together. I've seen both in some highly respected designs.

If using a rectifier like GZ34 where the cathode is tied to the heater internally, or a indirectly heated retifier, then the (+) side of the power supply filter is fed from the heater center tap.

Joe

Report message to a moderator

Re: 5V CT rectifier hookup - help [message #30688 is a reply to message #30685]

Fri, 25 February 2005 15:38

Manualblock
Messages: 4973
Registered: May 2009

Illuminati (13th Degree)

Thats confusing since it doesn't match the schematic. Acording to Douglas, the full wave rec has the ct grounded.

Report message to a moderator

Re: 5V CT rectifier hookup - help [message #30689 is a reply to message #30684]

Fri, 25 February 2005 17:10

PakProtector
Messages: 935
Registered: May 2009

Illuminati (2nd Degree)

Hey-Hey!!!,
Been out salvaging some old broadcast stuff. Heavy and bulky...

On to your question. You can either hook the choke input leg up to the CT or you can leave it be( disconnected, but insulated and secured ) and hook the choke up directly to the cathodes of the rectifier.

See Damir's drawing for the 5V ( 5V4, 5AR4, 5R4...)and 6CA4 9-pin connections. If you stillhave questions, I'll be about.
regards,
Douglas

Report message to a moderator