DAC90A Audio Problems - Help! - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

electrogram · 22nd Mar 2017, 5:44 pm

A 600 ohm secondary on the output transformer is fine, these were fitted on very late models, which ties up with the date on your smoothing can

Silicon · 22nd Mar 2017, 11:23 pm

The most important characteristic of the output transformer is the turns ratio.

The same number of turns on the primary winding but with a different thickness of wire will give a different winding resistance. The transformer will still work correctly.

The 'ground' terminal of the volume control does not connect directly to chassis.
It is connected to the cathode of V2 and V3.

22nd Mar 2017, 5:44 pm	#21
electrogram Heptode Join Date: Jul 2008 Location: Hereford, UK. Posts: 719	Re: DAC90A Audio Problems - Help! A 600 ohm secondary on the output transformer is fine, these were fitted on very late models, which ties up with the date on your smoothing can

22nd Mar 2017, 11:23 pm	#22
Silicon Nonode Join Date: Jun 2007 Location: Coulsdon, London, UK. Posts: 2,169	Re: DAC90A Audio Problems - Help! The most important characteristic of the output transformer is the turns ratio. The same number of turns on the primary winding but with a different thickness of wire will give a different winding resistance. The transformer will still work correctly. The 'ground' terminal of the volume control does not connect directly to chassis. It is connected to the cathode of V2 and V3.