[Radioroslyn]

< Is there an easy way to tell the capacitance of those capacitor blocks?
There's two ways, you can read the diagram or some where on the phorum there is a list with the part # of each condenser with the value or values of the condenser inside. Some have two inside.

<I assume a generic yellow capacitor will replace them with no problem.
Yes as long as the voltage rating is high enough. Most new ones are 630v which are fine. If you are speaking of the little yellow mylars if you touch the yellow part with the solder iron chuck it you just shorted it out.

< What will we do if the antenna coil is open?
The same thing you'll do with the tickler winding on the oscillator coil if it is open rewind it. We can discuss when you have  sorted out the condensers. Like I said no worries there's a few steps to do in but it's not rocket science.
Terry
Diagram here: http://www.nostalgiaair.org/PagesByModel...013875.pdf