[Drakelist] TR4 SSB query

I am new to the list.  Have a TR4 with a weird problem.  It seems to tune up fine, good power out in the tune position, but when I switch to SSB and key the PTT, I get full RF carrier out.  It seems as though the suppressed carrier part of SSB isn't.  I know the mic is OK, PTT works and when 

[Drakelist] AC4 query

I have two AC4s that I have modified with the upgrade kit from:  http://www.sunlightenergysystems.com/theheathkitshop/page4/index.html One supply has the old 2 prong AC plug (#1), the other a modern 3 prong plug(#2).  Both work FB with a TR4, but neither work with a T-4XC.  I was under the