Atlantic1952:
All these wax capacitors needed replacement
Atlantic1952:
Electrical leakage has caused overheating of the wax
Atlantic1952:
Wax leakage due to excessive heat within capacitors
Atlantic1952:
A bit of a mess!
Atlantic1952:
SANY0834
Atlantic1952:
Speaks for itself
Atlantic1952:
The four valves are all 1940's technology
Atlantic1952:
The large metal box in the bottom left is the inverter transformer
Atlantic1952:
Valves were made in England though they were originally designed in the USA
Atlantic1952:
Speaks for itself. Unusual to have both voltage and polarity adjustments easily carried out.
Atlantic1952:
Another view
Atlantic1952:
Now cleaned up and all wax capacitors replaced
Atlantic1952:
The 12SR5 had been got at as its contacts were burnt out
Atlantic1952:
Going back together after contact attention
Atlantic1952:
The internals of the Plessey 12SR5 vibrator
Atlantic1952:
Work in progress
Atlantic1952:
The set working at last. The 7C6 HT decoupling capacitor of 300pF was short circuit killing supply to the valve.
Atlantic1952:
The top vibrator is a NOS 12SR7 I hope to make use of.
Atlantic1952:
The newly hatched 12SR7
Atlantic1952:
That black gunge is like thick varnish. The contact areas had a very hard varnish like coating and failed to clean up.
Atlantic1952:
Bad contacts
Atlantic1952:
DRH car radio ad from June 1953.
Atlantic1952:
New mounting made for HT feed resistor top left
Atlantic1952:
New tag mounting made for HT feed resistor of 470 ohms on the left
Atlantic1952:
The re-canned Plessey 12SR5 vibrator unit.
Atlantic1952:
The HT smoothing chokes are above the HT capacitors
Atlantic1952:
SANY2516
Atlantic1952:
Taking it apart, a tricky operation!
Atlantic1952:
The Plessey 12SR7 in front of the 12SR5
Atlantic1952:
Running under test, working well once more!
