Thanks to all for the 6V6 substitution info. In the back of my brain I kind
of remembered that. I also found a pair of 6C4's on eBay and the price was
good.
Bob W6TR
----- Original Message -----
From: "Edward B Richards" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, February 20, 2006 1:36 AM
Subject: Re: [AMRadio] 4H4 Ballast
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
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