I depend on my tube tester, but sometimes they mislead. I had the mic amp 12AX7 test good for my T-4XC, but was actually weak. A new cheap Chinese tube worked well. The mic amp circuit may be touchy and need a strong performing tube.
73, Bob WW3QB --- On Tue, 6/8/10, Peter & June Harband <[email protected]> wrote: > From: Peter & June Harband <[email protected]> > Subject: [Drakelist] T4-X low mic drive > To: [email protected] > Date: Tuesday, June 8, 2010, 7:48 PM > > When using a 10-DA mic (no preamp) on > the T4-X I have to turn the gain control almost all the way > up and still don't get enough output. The mic drives the > TR-4 fine at about 10 o'clock position. The 12AX7 checks > good and the unit has been re-capped.Is this a known issue? > I get full rated output on cw. > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist > _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
