Museum Hours:

Saturday 10-6

Sunday 12-5

Early Electronic Television

RCA TRK-9 Restoration

This set is a 9 inch direct view model with a radio. Here is technical information.

Cabinet. (pictures). The cabinet is in fair condition, with many scratches on the top and peeling veneer. It will need to be refinished.

The refinishing is now complete and the set has been re-assembled. Restoration is now complete. Here is the completed set.

Chassis. There are four chassis: TV power supply, TV receiver, radio power supply, and AM/SW Radio. Each will be cleaned with water and a mild detergent using soft brushes to get into small places. Then, all paper capacitors will be replaced with modern ones (see the procedure for this). Each electrolytic capacitor will be tested for leakage and capacity. If bad, new electrolytics will be installed inside the old ones. The high voltage (EHT) capacitor also had to be rebuilt.

TV Power Supply Chassis:  This chassis is in good condition with a small amount of rust. It contains the low voltage supplies for the TV chassis and the high voltage supply for the CRT. All of the electrolytic capacitors and high voltage capacitors have been tested, and, amazingly, they are all good. This chassis now works.

TV Receiver Chassis:  This chassis is in good condition with a small amount of rust. It contains the RF, IF, video, audio and sweep circuits. After replacing all of the paper capacitors, the set worked with no further servicing.

Radio Power Supply Chassis: This chassis is in good condition with some rust. It contains the power transformer and rectifier for the AM/SW radio. The electrolytic capacitor had been replaced with a modern one, which I replaced with a pre-1945 one with a new capacitor inside.

AM/SW Radio: This chassis is in good condition with some rust. It contains a high quality AM/Short Wave radio. Most of the wires leading to connectors, and to the eye tube, had disintegrated and had to be replaced. After replacing all the paper capacitors, two power resistors were found to be bad. The radio now works properly.