[AMRadio] Question about HQ-180

WA5VGO hbrnut at suddenlink.net
Mon Sep 11 09:55:28 EDT 2017

Hammarlund originally placed a plastic dust cover over the capacitors. 
They discovered that removing it improved stability so stopped using it. 
They also recommended that it be removed from receivers that had it.


On 9/10/2017 8:16 PM, Steve Wender wrote:
> Hi All,
> I am about done bringing an HQ-180 back to life.  Because there seemed 
> to be several versions on the alignment procedure, it took a while to 
> figure it out.
> The question I have is about whether the two variable caps for the 
> main tuning and bandspread are shielded.  I have seen some pictures 
> showing what looks like an aluminum box over them.  In fact there is a 
> bolt sticking up from the caps that can be used to hold down the 
> shield covers.  Do you think these are necessary? My HQ-180 doesn't 
> have them. Any opinions?
> Thanks,
> Steve
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