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WE 302 Field Trial Sets

Metal or Bakelite??

©2002-10 paulf.  All rights reserved.
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ON THIS PAGE:     D-95647    D-97464 Bakelite    D-97464 Metal    D-97730 Handset


D-95647
Photos taken of Roy Basci's displays at the 2001 and 2002 TCI Labor Day Shows
WE 302 metal prototype
Dated 1932 ( IV 32).

This early model is a lot longer and somewhat narrower than the production model.

The vents for the ringer are way at the back.

Both handset and line cords exit on the left side, about 3/4 of the way back.

The handset contains the early "bullet" transmitter, as the capsule F1 transmitter wasn't developed until 1934.
WE 302 metal prototype - inside The capacitor (D95648) is toward the front of the phone (left in photo), then a 101A inductor and the ringer, with gongs at the back edge.

The ringer is an A1A.

The switchhook is a simple DPST design (double pole, single throw).

Note the wide fabric hinge used to protect the wiring between the base and housing.
D-97464 Bakelite
Photos taken of Paul Vaverchak's display at the November 2002 Enfield Phone Show

The set was later owned by John Fehl, who wrote an interesting article with detailed photos
published in TCI's Singing Wires in the December 2015 issue.
WE bakelite prototype 302
At first glance, it looks like any other early 302 with E1 handset.
WE bakelite 302 prototype bottom plate
The bottom plate is metal, and obviously different from the later production sets.

The feet are of similar shape, but thinner than the production feet and are riveted in place.
D97464 bakelite inside


Inside, the coil and capacitor are obviously different than the production model.  On this set, both are stamped in red "4579."  The inside of the housing is also stamped 4579.


The footprint was reduced by turning the ringer 90 degrees,  designing a smaller capacitor and tightning up the component placement.  Moving the ringer to the front of the set allows one gong to overlap the 101A induction coil.

Notice that there are several interesting tabs along the edges of the bottom plate.  They fit into matching slots in the housing to assure proper alignment.

WE bakelite prototype 302 inside top
The apparatus blank in this manual model is also bakelite -- no insulated terminal strip needed, as on the later metal blank shown below.
WE bakelite prototype 302 schematic

D-97464 Metal

Most found D-97464s have a cast metal housing.  The base plate and internal components appear identical to the bakelite set above.  Metal sets were made in both the first and second quarters of 1936 - marked I 36 and II 36.

A handset that looked a lot like the F1 production handset was used on some of the later sets.  The transmitter cap was made in 2 pieces, with a screen similar to that on the E handsets held in place with a bakelite ring.
D-97464 Metal - E Handset
(Photos from Frank Ruffino and past auctions)
D-97464, E handset
D-97464

I 36
D97464 bottom
Bottom View.


Note that both cords come out the back thru one cutout.

Both cords came out the left side on the D-95647, above.

The production 302's handset cord exited out the left while the line cord went out the back.

                   (Add your own joke punch line here.)
Field Trial ID
Field Trial Station Number and Instructions.
D-97464 Metal - F-style Handset
(Photos from Bob Loeser and past auctions)
D-97464 with F-style handset
D-97464

II 36
Handset details

Transmitter Cap
D-97730 Handset

Has metal threads for the handset caps, similar to the E handset.

The handle is seamless.

The 2-piece transmitter cap uses the same fiber screen used in the E handset.

Note that the Northern Electric NF handset also uses a similar 2-piece transmitter cap.

   http://www.paul-f.com/neUNI.html  (scroll down)
Set internals - top

Set internals - bottom
Sets with bakelite and metal housings use the same  model number.

The internal components are the same, as expected.
Apparatus blank in metal set
Here is the back of an apparatus blank in a manual (non-dial) metal set, showing the need for a terminal strip, as used in the production model.
Continue to the Rotary Set Development Timelines.

 


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©2002-10 paulf.  All rights reserved.