Home » Audio » Group Build » 5V CT rectifier hookup - help
5V CT rectifier hookup - help [message #30679] Fri, 25 February 2005 11:58 Go to next message
colinhester is currently offline  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

Re: 5V CT rectifier hookup - help [message #30681 is a reply to message #30679] Fri, 25 February 2005 12:56 Go to previous messageGo to next message
Manualblock is currently offline  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?

Re: 5V CT rectifier hookup - help [message #30682 is a reply to message #30681] Fri, 25 February 2005 13:18 Go to previous messageGo to next message
cheetah is currently offline  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

Re: 5V CT rectifier hookup - help [message #30683 is a reply to message #30682] Fri, 25 February 2005 13:44 Go to previous messageGo to next message
colinhester is currently offline  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

Re: 5V CT rectifier hookup - help [message #30684 is a reply to message #30679] Fri, 25 February 2005 13:47 Go to previous messageGo to next message
Forty2wo is currently offline  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

Re: 5V CT rectifier hookup - help [message #30685 is a reply to message #30683] Fri, 25 February 2005 14:14 Go to previous messageGo to next message
cheetah is currently offline  cheetah
Messages: 70
Registered: May 2009
Viscount
Heater center tap tp cap (+), HV center tap to cap (-).

Joe

Re: 5V CT rectifier hookup - help [message #30687 is a reply to message #30683] Fri, 25 February 2005 14:28 Go to previous messageGo to next message
cheetah is currently offline  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

Re: 5V CT rectifier hookup - help [message #30688 is a reply to message #30685] Fri, 25 February 2005 15:38 Go to previous messageGo to next message
Manualblock is currently offline  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.

Re: 5V CT rectifier hookup - help [message #30689 is a reply to message #30684] Fri, 25 February 2005 17:10 Go to previous messageGo to next message
PakProtector is currently offline  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


2.5-0-2.5... [message #30690 is a reply to message #30679] Fri, 25 February 2005 17:11 Go to previous messageGo to previous message
PakProtector is currently offline  PakProtector
Messages: 935
Registered: May 2009
Illuminati (2nd Degree)
This is how the 5 V winding is CT. The 6.3 goes 3.15-0-3.15. Tap in the center.
regards,
Dogulas

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