- Joined Mar 19, 2019
Working on an old shortwave radio which mice had made a meal out of the 4" speaker and its mounted audio XFMR. Parts list gives no specs. The operating spec say 1.7W and the 50C5 is rated for 5W max. What would be the correct parts to put on the output? I don't see anyone selling the combo speaker with audio XFMR except for some old pulls from popular radios. I did some measurements on the XFMR. Primary 186.4Ω, Secondary 0.748Ω and put a 1kHZ @1Vrms signal on the secondary and Primary was .204VAC. So looks like a 5.4:1 XFMR? I might be able to patch and salvage the XFMR but have no idea what the ouput impedance is although I want to say I saw 3.2Ω impedance somewhere. I don't see anything even close for an audio XFMR on Mouser or DigiKey... So open to new ideas.