[Boatanchors] WTB: Small Tube Output Transformer

[Jim Wiley]

This has been mentioned many times, but once more won't hurt, because it 
is a continuing need.   A paging system "70-volt" speaker matching 
transformer will do this job just fine.  Pick among the taps for the 
best match / max sound output.  These transformers are often available 
for free as "pulls" from companies that install sound systems in hotels 
and such.  These transformers are not rated for much DC in the primary 
(Hi-Z) winding, but unless you are connecting it to something like a 6L6 
output stage, it will probably work OK.  There is a chart somewhere (do 
an Internet search) that equates transformer ratings in watts to actual 
primary and secondary impedance.


- Jim, KL7CC


On 11/23/2012 10:42 AM, J. Forster wrote:
> Hi,
>
> I'm looking for a small tube output transformer to match low-Z headphones
> to a BC-221.
>
> Rough specs:
>
> Pri 4k - 10k Ohms, single ended or push-pull
> Sec 4, 8, or 16 Ohms.
> Pwr <5 Watts
>
> Can be new or used pull. Minimum lead length 1". Something from an All
> American Five would do fine.
>
>