[Boatanchors] HRO Coil Padder adjustment.

[Olaf Madsen]

Hello all you National fans and experts,

I am struggling to get better alignment and tracking on some of the coilsets 
for an HRO-5,which otherwise turned out well in the restoration.---

The coilsets have been thru many  hands and the ''factory alignment'' has 
long been scxrewed up .The series padders in the individual coilboxes are 
multi turn mica compression trimmers which are accessed thru holes in the 
back of the coilbox .--- there is no way  to get at them,unless you pull the 
whole coilset out of the receiver

How,the h...l,can you do this unless you trust your luck and good ears by 
adjusting those padders a 1/4 turn at a time,shove  the coilset back into 
the radio and hope for the best.

National,I am sure, had a testfixture set up to just to do the coil and 
tracking alignment,but what does ''Joe Ham '' do now.????

I have an HRO-7 where the coilset alignment and tracking are pretty much 
''on the money'', they came with the radio and  the padders appearently have 
not been tempered with.----Those coils also work in the HRO-5 and the 
improvement is substantial..

The manual is of little help --It does not tell you HOW to do it,except for 
using a screwdriver,hi---

I hope there is some advice out there for a less painful solution ????

TNX in advance---73 de Olaf,KF4TP.--