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substitute tub 7A4 vs XXL
John R
runawaytruck
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Posts: 94
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Joined: May 2010
City: Albuquerque, NM
#2

06-12-2011, 11:45 AM
Hi,
The 7A4 is a direct substitute for the XXL and should work fine. If you look up the XXL on tube suppliers websites they usually show XXL/7A4. Have several 7A4's in radios that work fine in place of the original XXL Philco tubes. John
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Messages In This Thread
substitute tub 7A4 vs XXL - by gennet2 - 06-12-2011, 06:45 AM
Re: substitute tub 7A4 vs XXL - by John R - 06-12-2011, 11:45 AM
Re: substitute tub 7A4 vs XXL - by Carl Travis - 06-12-2011, 12:38 PM
Re: substitute tub 7A4 vs XXL - by codefox1 - 06-12-2011, 01:17 PM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration