The r-4b is 13516C and the t-4xb is 18199b
On Mon, 2011-08-22 at 10:54 -0400, Garey Barrell wrote: > Brian - > > S/N ?? > > 73, Garey - K4OAH > Glen Allen, VA > > Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line > and TR-4/C Service Supplement CDs > <www.k4oah.com> > > > BRIAN WINGARD wrote: > > Hi, I am new to the list and Drake equipment. Just picked up a B line minus > > the power supply for > > the TX-4B. The R-4B was dead in the water. The first mixer osc was > > intermintant. That seems to > > be fixed. Now I have low sensitiviy but working . The AVC voltages seem ok > > and the tubes all > > checked good. All the AVC voltages around -1.1 any varying with signals > > to the 2 volt range. > > Anyway my question is where can I purchase a good quality schematic ? > > Thanks > > Brian > > N4DKD > >
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