I've got the TF1245A with both the TF1246 & TF1247. The TF1247 also comes with an 'adapter' (TM5727) to 50 ohms. Presumably this could be used in reverse to match 50 ohms to the low impedance of the Q meter (although I haven't tried it)
Michael
NV3Z / VK2BEA / G4NYV
vk2bea