Hammond Primary Lead color is wrong?

athos56 · 16th October 2008, 06:15 AM

Ok I'm wiring up my buffer and my Hammond 269ex and the primary lead color is wrong. On the site and the label it says that the black leads are the primary leads and the green are for the filaments. However the black leads are coming out of the side with the secondaries and the green are coming out all by themselves on the other side, ie the primary... Needless to say I'm a bit worried

. The resistance on the 6.3v side should be less then the resistance on the primary correct? Just to check...

athos56 · 16th October 2008, 06:26 AM

Red secondary 190-0-190 measured a few hundred ohms
Black Secondary 6.3?? measured in the teens
Green Primary?? measured .5 ohms

I'm thinking that the black and green are mixed up and that the green IS the primary...

Yvesm · 16th October 2008, 06:34 AM

Hi,

The location of the wires is meaningless, the manufacturer may even have choosen to have the input of a winding on a side and its output on the other.
There is no reason to "group" the primaries nor the secondaries together, or, differently said, there is no specialized side.

Trust the colors of the wires, not the physical position.

According to the measured values, green is definitly a lo voltage secondary ! !
Use fuses to void frying your PT !

Yves.
You should be sleeping at this time

athos56 · 16th October 2008, 06:53 AM

Ok, trust the colors... It just made sense to me to group the secondaries together... Yeah, I should be sleeping

, with Grad school, reading, grading papers, writing papers, reading, reading, this is the only time I have for fun

thedrous · 30th January 2011, 03:45 PM

Yeah It seems I have run into this issue also. I'm Starting my first firefly build, and ordered a 269ex from Angela parts. There are 2 green on one side of the transformer. Also 1 black, 2 red, 1 gray, 1 white, and 1 orange and yellow on the other side. The chassis layout on the diyguitarist.com site calls for 2 black wire to run to the Power DPST switch. Seems like I only have one...Any suggestions on how to wire it up?

VictoriaGuy · 30th January 2011, 07:43 PM

Quote:

Originally Posted by thedrous

Yeah It seems I have run into this issue also. I'm Starting my first firefly build, and ordered a 269ex from Angela parts. There are 2 green on one side of the transformer. Also 1 black, 2 red, 1 gray, 1 white, and 1 orange and yellow on the other side. The chassis layout on the diyguitarist.com site calls for 2 black wire to run to the Power DPST switch. Seems like I only have one...Any suggestions on how to wire it up?

Ten seconds with internet search got me:
Hammond Mfg. - "Classic" Power Transformer - (263-282 Series)
There, I read that the Hammond transformers in this series now have primary windings that can be wired for 115 or 125 volts (depending on your local supply voltage).
For 115 volts - white and grey are the primary connections
For 125 volts - white and black are the primary connections

John

thedrous · 31st January 2011, 12:20 PM

Thank You John

16th October 2008, 06:15 AM	#1
athos56 diyAudio Member Join Date: May 2006 Location: Yakima, Washington	Hammond Primary Lead color is wrong? Ok I'm wiring up my buffer and my Hammond 269ex and the primary lead color is wrong. On the site and the label it says that the black leads are the primary leads and the green are for the filaments. However the black leads are coming out of the side with the secondaries and the green are coming out all by themselves on the other side, ie the primary... Needless to say I'm a bit worried . The resistance on the 6.3v side should be less then the resistance on the primary correct? Just to check...

16th October 2008, 06:26 AM	#2
athos56 diyAudio Member Join Date: May 2006 Location: Yakima, Washington	Ok... Red secondary 190-0-190 measured a few hundred ohms Black Secondary 6.3?? measured in the teens Green Primary?? measured .5 ohms I'm thinking that the black and green are mixed up and that the green IS the primary...

16th October 2008, 06:53 AM	#4
athos56 diyAudio Member Join Date: May 2006 Location: Yakima, Washington	Thanks! Ok, trust the colors... It just made sense to me to group the secondaries together... Yeah, I should be sleeping , with Grad school, reading, grading papers, writing papers, reading, reading, this is the only time I have for fun

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16th October 2008, 06:34 AM	#3
Yvesm diyAudio Member Join Date: Jul 2004 Location: Ardeche	Hi, The location of the wires is meaningless, the manufacturer may even have choosen to have the input of a winding on a side and its output on the other. There is no reason to "group" the primaries nor the secondaries together, or, differently said, there is no specialized side. Trust the colors of the wires, not the physical position. According to the measured values, green is definitly a lo voltage secondary ! ! Use fuses to void frying your PT ! Yves. You should be sleeping at this time

30th January 2011, 03:45 PM	#5
thedrous diyAudio Member Join Date: Jan 2011	Yeah It seems I have run into this issue also. I'm Starting my first firefly build, and ordered a 269ex from Angela parts. There are 2 green on one side of the transformer. Also 1 black, 2 red, 1 gray, 1 white, and 1 orange and yellow on the other side. The chassis layout on the diyguitarist.com site calls for 2 black wire to run to the Power DPST switch. Seems like I only have one...Any suggestions on how to wire it up?

31st January 2011, 12:20 PM	#7
thedrous diyAudio Member Join Date: Jan 2011	Thank You John

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