[The Philpott]

Here's one i dismantled earlier...!
The bobbin with the pink triangle on it should be 8kohm, that will enable the 25v range to be accurate (if all other aspects of the meter are ok)
If you have given it 2k the 25v range will now be a 10v range!

I use 330k and 8.2k in parallel to get 8k, as those are the values that i have plenty of.

Dave