Magnetic Components 40-18078 PT wiring question

[olgoat]

I am replacing the PT in my working 5E3 build with this "more complex" power transformer.  I am baffled by the comment on the spec sheet for secondary wiring.

"Use RED-RED/Yel-RED for 355-0-355, Use ORN-RED/Yel_ORN for 330-0-330"   

I have 2 red and 2 orange wires.  There are no Yel-Red or Yel-ORN wires.  Any idea what they are talking about?  I have an email into them but they are a bit slow in responding.


Also on page 2 for the primary wiring.  For 120V.  I assume I need to connect the brn and blk to the power switch and the blk/wht and brn/wht to the power cord hot lead?

The transformer I am replacing was a straight forward 120V  single secondary voltage which is was much simpler compared to this beast.

Thanks

[olgoat]

[olgoat]

Attaching jpg incase pdf is not viewable

[olgoat]

Call off the dogs.  Just heard back from Magnetic Components.   Pasting the reply.

"You are correct for the primary connections.

For the HV secondary, use the RED, RED/YEL, and RED leads for the 5E3 Deluxe. Use the ORN, RED/YEL, and ORN leads for later Deluxe amps. The 5E3 had higher plate voltages than the newer amps.

If you want plate voltages like the P-TF22772, then use the ORN, RED/YEL, and ORN leads."

The comments about the other colors must be for another variation of the transformer I guess. 

TWC

[archaos]

There are no Yel-Red or Yel-ORN wires.

Come on ! Does that mean you don't have the center tap on that PT ?
I've used a 40-18078 PT in my 5E3 (240 VAC ; 660 VCT) & everything was OK.
There's something I can't figure out yet : why Magnetic Components don't say a word about the lack of the center tap in their answer ? What did you ask them actually ?

[olgoat]

He mentioned the center tap.  That was pretty clear from the spec.  "For the HV secondary, use the RED, RED/YEL, and RED leads for the 5E3 Deluxe. Use the ORN, RED/YEL, and ORN "    CT is the Red/Yel and I was clear about that early on.   What I did not see was a Yel-Red or a Yel-Org which they reference in the spec.  That's what was confusing me.

There are no Yel-Red or Yel-ORN wires.

Come on ! Does that mean you don't have the center tap on that PT ?
I've used a 40-18078 PT in my 5E3 (240 VAC ; 660 VCT) & everything was OK.
There's something I can't figure out yet : why Magnetic Components don't say a word about the lack of the center tap in their answer ? What did you ask them actually ?

[sluckey]

What I did not see was a Yel-Red or a Yel-Org which they reference in the spec.

Look at the spec sheet again. There's no mention of a "Yel-Red" or "Yel-Orn" wire.

What they say is Red-Red/Yel-Red. The dash is the separator between the three wires, ie, you have a Red wire, then a Red/Yel wire, then another Red wire. Red/Yel is the red wire with yellow stripe.

Red  -  Red/Yel   -  Red

[olgoat]

I was about to say yer wacked!  but went back and looked again.  In the software business we would call that "precedence of operators"  :)  I was seeing the / as the separator not the dash.   Thanks

What I did not see was a Yel-Red or a Yel-Org which they reference in the spec.

Look at the spec sheet again. There's no mention of a "Yel-Red" or "Yel-Orn" wire.

What they say is Red-Red/Yel-Red. The dash is the separator between the three wires, ie, you have a Red wire, then a Red/Yel wire, then another Red wire. Red/Yel is the red wire with yellow stripe.

Red  -  Red/Yel   -  Red

[mresistor]

I'm curious, why not go with Magnetic Compenents 14-18021 and no extra wires or hookup matrix - and $20 less?

[olgoat]

Honestly I am concerned about how the circuit is going to react to a 710V secondary.  It is running with a 650V secondary right now.  If I don't like it, this PT gives me the option of easily change it to a 660V secondary.

It sounds pretty good now. Just seeing if I can get it to sound a bit better.   

I did not intend on changing the PT at all. I originally was going with the multitap OT but then saw the dual secondary and thought I'd give it a try while I was tearing the chassis apart.  The PT change is taking a lot more effort than the OT change.  Probably a bad idea over all.

I am so far beyond "Saving $20" with this chassis it is ridiculous.. 

[John]

I am so far beyond "Saving $20" with this chassis it is ridiculous..

 

For sure, we don't do this to save money!

[mresistor]

I surely know what you guys mean. But, it's not as bad as a boat is it?    lol

thanks , I was just wondering what you were up to with all the wires on that beast..   I saw they do have one with lower voltage too.