Old Plastic Tube Emerson Radios

Except for the AM/FM set, all these below Emerson tube radios use the same circuit board. This board has the IF tube input biased to ground instead of the AVC line. Thus there is no point in using a remote cutoff pentode (12BA6) for the IF stage as its gain is not varied. So I replaced the 12BA6s with some 12AU6s (sharp cutoff pentode) I had many of. This reduces "modulation rise" distortion products in the amplified signal.
See the sub-miniature tube AM radio modification page for this radio on the right.

model G1705

Original tubes in this set datecoded 65-17