[R-1051] Frequency standard failure

[José Manuel]

Hello to all from a new member:

We are a group of local hams who have some R-1051 rx´s. Most of these sets
have the same problem, located in the frequency standard assembly, caused
for the failure of the temperature sensor R2, a 3.9 kohms PTC thermistor.
Can Cecil, or any other member, tell us where to find such a component?

Thanks in advance
José, EA1PX, Spain