OT:What going to happen if I match 200ohm amp to 16ohm speak

**gvasale** · May 18th, 2012, 02:43 PM

Well, someone educate me... The schematic shows 3k to 3.5k impedance? for the primary side of the output transformer. Should the transformer we're looking for be in the same range? It seems to me if your going to use one with a 200 ohm impedance, its looking like way too much of a load. Correct of not? Unless the output transformer is IN the circuit and it just needs a matching transformer.... but when, then, did the 600 ohm become standard?

**tomt** · May 21st, 2012, 06:07 PM

schematic here -

Ela V304/1 Amplifier Telefunken Deutschland TFK, build 1938&

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Originally Posted by gvasale

but when, then, did the 600 ohm become standard?

the original line impedance at the phone company. (in the usa)

**RonSSS** · May 21st, 2012, 06:18 PM

That helps, thanks.

Transformer coupled, push pull EL34 output.

If these are phone company amps, bandwidth was likely not hi fi.

Being push pull finding a correct output transformer to match to 8/16 ohm speakers just got real easy.

Ron

**sanhanul** · May 22nd, 2012, 08:55 PM

I got the UTC transformers. I think I am ready for the amplifier now. Thank you everybody especially AltecBest who found the UTC for me.

I learned a lot from this thread and I am encouraged to learn more about the specification of the amplifier and transformer.

I will post the amplifier pictures with the transformers later.

UTC LS-33 Audio High Level Line Matching Transformer | eBay
UTC LS-33 Audio High Level Line Matching Transformer | eBay