UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Copicat MK2

ronbryan · 15th Mar 2019, 3:03 pm

You say it is still a bit quiet. Have you looked at the attenuation network of resistors on the switch bank? Are they an array of 220k and 100k resistors as shown on the Mk II circuit diagram?

The 25uF electrolytic capacitors on the replay ECC83 cathodes will affect replay amplifier gain. Have you checked or swapped those?

Ron

15th Mar 2019, 3:03 pm	#33
ronbryan Octode Join Date: Jan 2003 Location: Guildford, Surrey, UK. Posts: 1,960	Re: Copicat MK2 - No Echo You say it is still a bit quiet. Have you looked at the attenuation network of resistors on the switch bank? Are they an array of 220k and 100k resistors as shown on the Mk II circuit diagram? The 25uF electrolytic capacitors on the replay ECC83 cathodes will affect replay amplifier gain. Have you checked or swapped those? Ron