Hi Bob; Use a 6V6 in place of the 4H4 ballast tube. I have a used but good 6V6GT and a NOS 6C4 you can have for $5 plus $2 shipping. Good luck.
73, Ed Richards K6UUZ Simi Valley, Ca 93065 Home of the Air Force 1 pavilion On Sun, 19 Feb 2006 22:52:04 -0500 "Bob Maser" <[EMAIL PROTECTED]> writes: > It appears that I have found the problem in my HRO60. I turned it on > one > day last week and all I could hear was floor noise. I couldn't even > hear > the xtal calibrator and all 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. Anyone > have a > spare they would be willing to part with? I have a 7H4B but when I > plugged > it in I get 12VAC out to the mixer and HF osc filaments. My HF > Oscillator > tube 6C4 is really weak so I need one of them too. > > Help would be appreciated. > > Bob W6TR Florida > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > >
