[AMRadio] 4H4 Ballast

Grant Youngman nq5t at comcast.net
Mon Feb 20 00:06:50 EST 2006

You don't really need the 4H4 -- unless you live in the boonies and have
really poor regulation on your line voltage.  Just plug a 6V6 into the


> drawers(bands) were the same.  After much poking and prodding 
> and tube testing, come to find out the 4H4 has a broken 
> filament wire, which means that the HF oscillator and the 
> mixer aren't getting any filament volts.  Now I need a 
> replacement 4H4.  

More information about the AMRadio mailing list

This page last updated 18 Dec 2017.