Hi,

Collins sold the accessory model 55G-1 low frequency tuner
in order for the 55S-1 receiver to be used below 2mc.

The 55G-1 uses a single FET, and works on two bands,
200 to 600kc and 600kc to 2mc.
It came in a cabinet which matches
the style of the 55S-1. A small speaker is included.
The 55G-1 is pretty rare, and may cost almost as much
as the receiver, depending on condition.

If your receiver is totally dead below 2 mc
(i.e., you can't even hear the 100 kc calibrator),
V10A or V16A may be bad. (Both are 6EA8 tube sections).

If the previous owner used the 51S-1 receiver
with a 55G-1 tuner, he would have cut the internal
link between J13 and J14 (RCA connectors on the back panel
of the 51S-1). Try plugging in a patch cord
between J13 and J14 and see if that helps.

73,
Ed Knobloch



wrote:
Help: Collins 51S-1 No rx on 1 band
Hi
I just received a MINT Collins 51S-1
and I tried all bands on receive and all work great
except the AM broadcast band 77 ABC etc.
All other bands are fine?