[Techlunch] Line speaker transformer

techlunch at happy.emu.id.au techlunch at happy.emu.id.au
Wed Aug 26 00:45:56 EST 2015

Hi Bill

I had a look through DSE catalogues from 1979-2001 and was unable to 
find this model number in any of them.
Now there is a M-2840 in pretty much all of them but this is a 240V to 
9V CT 150 mA 1.4VA.

The standard fare for an audio Transformer thru all these catalogues is 
a M-1100 with 2.5 & 5k primary (70 & 100V) Plus tapped secondaries for 
2, 4, 8, 16 Ohms power rating 4W.

Could it have been an Altronics product?

At a pinch put an audio signal generator in one side and measure the 
other side volts.
Should be able to work out the turns ratio at least this way.

Neil VK1NP

On 25/08/2015 9:38 PM, techlunch at happy.emu.id.au wrote:
> Dear gentle folk,
> Does anyone have an old (real old) Dick Smith catalogue? You know, the 
> ones that used to have real information in them!!
> I have a couple of transformers, which I'm pretty sure are 70V/ 100V / 
> 8Ω.  The stock item number is M-2480.
> The 8Ω side is obvious, but there are 3 wires on the HV side, so not 
> sure exactly how its configured!!
> cheers
> Bill
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