Wireless Set No. 52 Canadian - Project

[David Dunlop]

These small CLIPS are one of the simplest designed parts of the receiver so far, but potentially one of the more interesting to sort out when it comes to the assembly work process.

They are used with the eight ARP-3 Valves in the receiver, the V1-Series of valves. All of these grid cap leads are single lead items feeding directly to a contact point on a socket, coil base or Tag Panel.

These two CLIP Leads came from the V1G and V1H ARP-3’s (the only two vertical ones in the receiver) mounted on the lower front left chassis floor, and went straight to a Tag Panel. They feed through a 0.199-inch diameter hole in the chassis floor that is lined with a metal eyelet, to prevent cutting of the lead insulation. As you can see, these holes are located just to the left of the rear socket rivets. A third, similar CLIP lead is located on the upper left back chassis panel next to the socket for the V1F ARP-3.

With each of these three CLIP assemblies, the clip has been soldered to one end of the led, a small yellow sleeve slid up over the soldered end of the clip and the sleeve carefully tied in place with one round of cotton cord. The end of the sleeve over the soldered connection was then lacquered. The sleeves are there to protect the lead insulation from chafing against the slots cut into the valve shield caps through which these CLIP leads pass.

It would make sense, with limited space to work in the chassis itself, that these CLIPS leads were preassembled and delivered to a station on the line for addition to the chassis at an appropriate time.

Similar CLIPS are used for ARP-3’s V1A, B and C across the upper front right rear of the chassis. These three are the shortest Clip leads in the receiver and they were added to the circuits as complete assemblies because the upper shield plate protecting the RF Coil Assemblies has three oversized holes in it to allow the Clips to easily pass through the plate when it is screwed in place, or removed. These three Clip leads, however, have black sleeves fitted to them. Reason unknown at this point in time.

The last two CLIPS are used with ARP-3’s V1D and E and these two leads feed out from inside the respective Coil Shields directly below each valve. The holes these two leads pass through are also 0.199-inch diameter, lined with metal eyelets.

It will be a little while yet before I am ready to remove these coils and shields to be able to have a look inside at the assembly work.

David