freed-eise: Freed-Eisemann NR-5

I have two of these radios and here are some observations. There must be earlier and later models.

As noted on this forum, one model does not match the published schematic. This model has studs for the wiring on the back of the radio, with no hook-up for a C battery. I have one of those and the re-drawn schematic matches fine. This radio says "Broadcast Receiver" on the front panel and has the original, gold painted Freed-Eisemann transformers, although they are open in the secondaries.

The second version I have (later version?) has the wiring for the batteries already attached, along with the wiring for the C battery. This radio matches exactly the original schematic. There are no studs on the back for wiring hook-up. The back of the radio shows where a cover was put over the holes, with modified labels for the antenna hook-up.

I have noticed 3 different instruction labels:

1. All black print, with no comments about the detector tube found on other versions.

2. Black print with an underlined comment to use only a 201A in the detector, no matter what anyone else says. Also text in red print warning ablut how to hook up the batteries. (this is on the first version I mentioned above).

3. All black pring, with the comment to use only a 201A in the detector, but without the red print about battery hook-up. The cable is already attached and I am guessing that the wires had labels for the battery.

 

To thank the Author because you find the post helpful or well done.

See Tuning the NR5

To thank the Author because you find the post helpful or well done.

I have just discovered that original alignment and tuning instructions for this type of "neutrodyne" receiver are given here.

To thank the Author because you find the post helpful or well done.