[R-390] HRO-50TI Question

[hcjoel]

Forgive this off the subject query. But there is so much collective knowledge displayed here that I hope someone will know.

I run a National HRO-50TI here while applying some TLC to my R-392 magic box.

How does one set the tuning on the lower end of each band on the plug-in coils. There are instructions in the official National operators manual. But there is no access to the holes at the rear of the individual stage coils/capacitors. Could it be that National used a test jig that allowed access?

Thanks for any input

Harry 
R-392:HRO-50TI:Icom PCR-1000:Sony IFC-2010


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