Can anyone tell me what these trafos might be good for?

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allbaldo
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Can anyone tell me what these trafos might be good for?

Post by allbaldo » Fri May 25, 2012 8:07 am

I have 8 Hammond 842 transformers that came from a McCurdy broadcast console.

Hammond's website says this...

Application: ** P.P. Plates to Line
Primary: 5K/20K (6K/24K)
Secondary: 125/500 (150/600)

Can anyone tell me what a trafo with these specs might be used for?

To say I'm a novice in my understanding of electronics would be an understatement, but I have a Sound Workshop 1280B with unbalanced direct outs, and I thought maybe these could be of use in balancing the outputs, and adding some color. Or, maybe they have different uses? I have an old Altec mixer that I could add direct outs to?

Any info would be greatly appreciated! Thanks!

Stephen

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Post by Jim Williams » Fri May 25, 2012 8:37 am

There's quite a step down in those, you would lose a lot of level using them as an output transformer.

Now as an input transformer, a different story. Wire up the 150 ohm taps as the mic input and then you may have a nice step up mic input transformer there.
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allbaldo
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Post by allbaldo » Fri May 25, 2012 12:51 pm

Thanks Jim! So would these likely hold their own against the little Beyer trafos in a 1280B? Or another application? I have a bunch of McCurdy mic pre's that also use the little Beyer transformers, and a bunch of channels from a Sound Workshop Series 30. Any uses with these?

Much appreciated!

Stephen

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Post by Scodiddly » Sat May 26, 2012 5:48 am

You could try using them for instrument direct boxes - it's a big step, but that might end up showing the guitar or bass a nice high input impedance.

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Post by scrotescape » Sat May 26, 2012 9:20 am

they are stepdown output transformers likely from tube circuit--to line level, but may work well reversed as a mic input step-up, or as a step-down input to a passive eq with a make-up gain stage
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Post by emrr » Sat May 26, 2012 7:19 pm

They may lack the shielding an input would have. I'd use them as intended, build some PP tube preamps.
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