UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Output transformer

barrymagrec · 24th Aug 2019, 9:38 am

It seems unlikely that the speaker is actually 2.2 ohms impedance, DC resistance possibly - more likely 3 ohms nominal and such figures are frequency dependent and far from exact.

Adding series resistance to the speaker will reduce power to the speaker and probably affect frequency response.

24th Aug 2019, 9:38 am	#2
barrymagrec Octode Join Date: Dec 2017 Location: Morden, Surrey, UK. Posts: 1,560	Re: Output transformer - when needs must It seems unlikely that the speaker is actually 2.2 ohms impedance, DC resistance possibly - more likely 3 ohms nominal and such figures are frequency dependent and far from exact. Adding series resistance to the speaker will reduce power to the speaker and probably affect frequency response.