[Techman]

No, those four in the large silver cans are the ‘electrolytic’ types that I mentioned and are unlikely to need replacing, unless there’s either a problem with ‘hum’ regardless of volume setting, or they start to feel warm to the touch after a short while.

The ‘critical’ capacitors will be under the chassis, but I can see in the second picture a couple of ‘Mullard mustard’ type capacitors. These are very reliable and unlikely to cause any problems, but worth doing some voltage checks on the grids of the output valves just to be sure. I don’t know where those two capacitors I can see are in the circuit, but if the rest are the same type, then you probably won’t have any work to do other than a few voltage checks, which myself or other members can explain to you.

Pictures showing the complete underside of the chassis would be a good idea. A list of the valve types of the amplifier and also the valve type numbers of those in the tuner while you’re at it, would be very useful.