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In Reply to: RE: Need some electrical help. posted by jea48 on November 04, 2016 at 21:22:35
Looking at the transformer, I see this label. Which is not the model number Stereojim mentioned, but is the one the link on the Boozhound site chooses when clicked, so I went with it.That is pretty close to the order you suggested, but different enough that I'm concerned. Let me see if I'm even understanding what's going on here. I get 15v AC from the transformer. Then put into the power supply which then makes the 15v AC into 15 V DC and I can listen to records. Is that correct?
Here is the thing. Let's take it very slow and step by step so I don't blow up stuff. This is the fused IEC plug I plan to use (which was given the OK by Mr. Boozhound himself).
According to the label, how do the wires connect to the plug? What color wire goes to which pin on that plug? In other words, how do I know which is the "hot" pin vs the other one you mentioned? Let's get that answered and then move on to step 2 which will be the board.
Edits: 11/05/16Follow Ups:
Manny,
A couple things in addition to what jea48 and stereojim have instructed:
1) If you connect the transformer leads directly to the IEC filter unit, the power supply will be constantly on whenever it's plugged in. This is your choice, of course, but if it were me I'd put a switch in there.
2) IEC input filters like the one you have are typically intended to have the wiring connections made with a slide-on connector (ie: stake-on terminal) rather than have anything directly soldered to them. Be aware that if you solder the transformer (or switch) wires directly to the IEC, you may melt and dislodge internal connections inside the filter depending on how it's constructed inside.
3) The center lug on the IEC filter should be the earth (or safety) ground tab. I strongly 2nd jea48's suggestion though to continuity check the filter from end to end and make sure the center lug matches up with the center pin on the other end. In any event, this ground should be connected to the chassis or case of the unit. This will prevent the case from being live if something is miswired or there is an internal fault or failure with the unit.
That is pretty close to the order you suggested, but different enough that I'm concerned.
What the picture shows is the primary has two windings. 2 X 115Vac
Winding 1) Blu-Gry leadsWinding 2) Vio-Brn leads
For a 115Vac feed input you parallel the two winding together. THEY MUST be paralleled together in phase with one another or they will buck each other like two Bull Moose butting heads.
Blu and Vio tie, connect, together. The Hot wire from the IEC connector connects here.
(If you are not using an on/off power switch and the Blu and Vio leads are long enough you could connect and solder them directly to the IEC connector Hot Line terminal)Gry and Brn tie, connect, together. The white neutral from the IEC connector connects here.
(If the Gry and Brn leads are long enough you could connect and solder them directly to the neutral terminal on the IEC connector)//
My previous post:
You said in your post.
for input connections 115VAC blue to vio and gry to brn APPLY TO blu and brn.
Primary is a dual winding.
For 115Vac
Tie the blue wire to the vio wire. > Connect the hot fused AC Line to this pair.
Tie the gry wire to the brn wire. > Connect the AC Line white neutral wire to this pair.
There is no difference.
/////
That's a weird looking IEC connector.If you look at the picture you will see where it says LOAD .
Then below LOAD you see P1 ..... PE ..... N1Strange markings. What country was that thing made for?
I think,
P1 = L, the fused Hot wire.
PE = Earth ground, the safety equipment ground.
N1 = N, the neutral white wire.If that thing were mine I would check the continuity of the thing to make sure. Is it a 15 amp IEC connector?
/////
I get 15v AC from the transformer. Then put into the power supply which then makes the 15v AC into 15 V DC and I can listen to records. Is that correct?
Actually the unloaded DC output voltage will be slightly higher 15Vdc. I forget the formula.Follow Stereojim post for the secondary winding configuration hook-up.
Double check, triple check, the winding configuration connections before you plug the transformer into the wall receptacle.
DO NOT connect the transformer to the circuit board/s until you first bench test the output voltage of the transformer. It should measure 15Vac.
Edits: 11/05/16
First, I really appreciate you taking the time to go through this with me. I'm particularly dense when it comes to this stuff. It doesn't help that there seems to be no consistent way of using colors or labels as you can see from the IEC socket. That's not a problem if you're fluent in circuits, but for the electrically illiterate, it's incredibly confusing. Not to mention potentially deadly.
I'm pretty sure I understand it now.
I chose this IEC connector because it's a power switch, fused and filtered "power module" which I thought would make for less fabrication on my part. I also thought the magnetic shielding couldn't hurt.
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