26-01-2020, 08:08 PM
Hi All,
I've had an opportunity this weekend to return to another project I had on the go. I bought this old 1963 (or there abouts) old instrument amplifier some while ago. Since these pics were taken I've removed and replaced all the Hunts caps, the plessey red/black electrolytics and the resistors that were well and truly out of spec. I'm now stuck as the output volume is very low indeed and heavily distorted but its not a pleasant musical distortion by any means. Being just a person that can follow instructions to build electrical equipment or to replace parts, my electronic technical knowledge is very much lacking with regard to problem solving. I have checked valve pin voltages on the ECC83, EL84 & EZ80 and all appears ok. I have reformed the smoothing cap too.
I am stuck what to do next?
Kindest Regards
Rob
I've had an opportunity this weekend to return to another project I had on the go. I bought this old 1963 (or there abouts) old instrument amplifier some while ago. Since these pics were taken I've removed and replaced all the Hunts caps, the plessey red/black electrolytics and the resistors that were well and truly out of spec. I'm now stuck as the output volume is very low indeed and heavily distorted but its not a pleasant musical distortion by any means. Being just a person that can follow instructions to build electrical equipment or to replace parts, my electronic technical knowledge is very much lacking with regard to problem solving. I have checked valve pin voltages on the ECC83, EL84 & EZ80 and all appears ok. I have reformed the smoothing cap too.
I am stuck what to do next?
Kindest Regards
Rob
if all else fails...read the instructions!