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Old Hammond 1640SE OPT

Hi guys,

I have a pair of old 1640SE sitting on my work bench for years and I'd love to make use of it, but I lost the connection data. There are Red, Blue/yellow and Blue on one side and Yellow, Green, Green/yellow and 2 Blacks on the other. Any help would be much appreciated.

Albert
 
Yellow to Blk/Yel should be about 1.2 Ohms (after subtracting out the meter leads Ohms)

Blk/Yel to Grn/Yel should be about .9 Ohm (" " ")

And Blk to Grn should be about .9 Ohm (" " ")

No continuity from Grn or Blk to the other set: Yel, Grn/Yel, Blk/Yel.

Make sure to rotate the bananna/lead connectors on the DVM first before doing such low Ohm measurements, or the contact resistances will overwhelm the readings. Then short the meter lead ends together to get the lead resistance, to subtract out from the winding readings.
 
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Yellow to Blk/Yel should be about 1.2 Ohms (after subtracting out the meter leads Ohms)

Blk/Yel to Grn/Yel should be about .9 Ohm (" " ")

And Blk to Grn should be about .9 Ohm (" " ")

No continuity from Grn or Blk to the other set: Yel, Grn/Yel, Blk/Yel.

Make sure to rotate the bananna/lead connectors on the DVM first before doing such low Ohm measurements, or the contact resistances will overwhelm the readings. Then short the meter lead ends together to get the lead resistance, to subtract out from the winding readings.

You're great. I have the numbers almost exactly the same as said.
The first set of three on top, yellow/Blk-yellow 1.2 ohm, Green-yellow/ Blk-yellow 0.9 ohm. The bottom set of two, green/Blk 0.9 ohm.
I put the green-yellow and green together and Blk-yellow/Blk together ( as said on hook-up data provided ), I now have 0.8 ohm with yellow and black. It supposes to be 8 ohm hook-up as of data.
On primary, Red with Black I have 82 ohm. Does it mean I can go ahead with this ??? Thanks

Albert
 
home brew 807pse

guys,

I lately check over the 807 data sheet and come up with the following schematics. Please do take a look and all comments are welcome.
BR

Albert
 

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