Old radio parts-page 3

1920s Radio Components

A job lot bought recently

 

 

A pair of early T.C.C. bakelite-housed capacitors

 These are 2uF and 1uF, 200vw probably designed for battery operated sets having an HT supply of around no more than 150 volts

The manufacturer was the Telegraph Condenser Company

but "TCC" sufficed as they were so well known

Early valve rectifiers

 

Philips 1561

An early rectifier in what is known as a balloon-shaped glass envelope

The anodes are matt black to assist in cooling

Rating: 4 volt 2Amp filament, 120 mA HT current and rated at 500-0-500V RMS

 

Mazda UU60/250

Another early rectifier both of a variety used in early mains powered radios. This has bright metal anodes containing a lot of metal and pre-date the blackening process of the other type shown above

Rating: 4 volt 1.25Amp filament, 60mA HT current and rated at 250-0-250V RMS

 Other manufacturers made similarly coded valves and improved their ratings to get an edge on sales


 

A set of 3 very old resistors

 These resistors are sealed in glass tubes presumably to give stability to the early resistive material


 

A set of 3 coils

 These are Wearite types, carefully matched for three stages of a TRF or "straight" receiver

The cans are solid copper and the coils plug into standard B4 valve sockets

Below (left) is a view of one of the coils showing the matching copper baseplate

It was vital for a stable receiver that there was no unwanted coupling between the amplifying stages, hence the copper screening cans.

 

This coil is unscreened and could have been used in the RF stage of a small valve receiver.

 

The coil would have been mounted horizontally, as shown, on its two posts

John Gibson dropped me a line to say it's the LW/MW tuning coil from a 1932 Ultra Blue Fox radio which is a 2 valve plus rectifier set with a AC2/HL grid leak triode detector utilising reaction, transformer coupled to a AC/Pen output pentode.


Three old solid-dielectric capacitors

This type were used for reaction controls, the name given to the application of positive feedback to improve the gain of a receiver

 

 

 


An old electrolytic capacitor

 

 

 Manufactured by TCC this is rated at 500uF, 50 Volt working. The case measures130 mm x 51mm x 51mm

The label is on the rear and will give a clue to the age. Any experts on electrolytic condensers out there?

 

 

A pair of post-war TCC adverts


Yet more old components! Return to Entrance