[Milsurplus] Ring a TU bell?

[Todd, KA1KAQ]

On 6/27/05, Unserviceable but Repairable <cosmoline at ba-watch.org> wrote:
> A friend is assembling an estate for sale & in it is this gizmo
> 
> > and a small piece of hardware Signal Corps  US Army Tuning Unit  MC-125-A
> 
> This wudn't be a plug-in for a BC-746 horsey-guidon-pogo cavalry talky, wud
> it (J. McCarty)?

Sounds like part of the RU/GF spline tuning system? Should know since
I've been fiddling with my system at home recently, but my brain isn't
fully engaged yet, so I can't tell you which piece. Should be fully
awake by 11 or so....

~ Todd,  KA1KAQ