Pye445 u

[Yorkie]

Very helpful info Lawrence.

We don't know yet which - if any - sections of the two wire-wound droppers are open circuit, but if the 450 Ohm one, dissipating 18 Watts is duff, personally, I'd be inclined to replace it with a 25 Watt or even 50 Watt metal-clad resistor as they have the merit of being relatively small and easily obtainable. They're only capable of dissipating their full Wattage if mounted on a heat sink and need to be de-rated by at least 50% if in free air - fitted to two existing tags of the dropper for example to bridge the faulty section. In that case, to have a margin of safety I'd be inclined to use a 50 Watt one, which is only 2" long. EG:

http://www.esr.co.uk/components/products...istors.htm

When Robin has had a good poke around with his Ohmmeter he might find the picture is rosier than it may seem at first sight.

On a set like that, with nine wavebands, I'd be more worried about the switchery in the front end.

But first things first - get the power supply working, then the AF and RF stages and keep my fingers crossed as to the front end behaving itself!