[Andy - G8MNM]

Having read this thread with interest , I dragged out my Ferguson 3645 14" transportable from its 7-8 year resting place, still wrapped up in bubble wrap from when we moved to France 7 years ago!

I had previously replaced quite a few out of spec resistors, a large brown Hunts capacitor and a decoupling cap C53 4uF - which had been causing a horizontal ripple on the display.

I have now replaced the 330K resistor with a 680 K (I had previously just replaced it with another 330K. I will have to find a replacement width pot though.

At the time I didn't know about the dreaded Callins caps and so didn't replace them on sight.

Fortunately alerted by this post I have just replaced all 3? Callins caps. The most important one being C81. I tested it on my ESR meter and it read 18 Ohm!

Had I powered up the set then bang and smoke!

I also noticed that the mains fuse had been replaced by a mains 3 Amp! Swapped it out for the correct 1.5 Amp.

Just wondering about the 'Blue & White' capacitors? Are they suspect too?

Thanks again for the info on the Callins!

Andy