5. Batteries and the DEAC ni-cad

With portable radio restorations I like to undertake the construction of an authentic set of reproduction batteries to demonstrate the radio operating with the specified battery types.

The HT battery is a Pertrix No.78 - the reproduction version housing a chain of 10 x 9 volt PP3 batteries connected in series to provide the required 90 volts.

The reproduction DEAC D6 contains a modern 1.2 volt ni-cad D-cell in a holder.

Two diodes limit the LT and ensure that it cannot rise high enough to cause damage to the valve filaments whilst the set is operating from mains power - the components are hidden inside the card case in a small cavity above the holder for the rechargeable D-cell.

The other two D-cells have been furnished with Pertrix No.231 covers of the period.

I managed to obtain original battery holders and straps from a related German AM/FM valve portable of the period that had a case damaged beyond repair.