19-07-2020, 08:29 PM
(This post was last modified: 19-07-2020, 08:33 PM by Mike Watterson.)
Some photos:
The mysteriously snapped SM cap lead. But not AT the connection!
You can see the odd value 220pF cap between DAF96 anode and DL96 grid. Got to be a manufacturing error, like the never soldered 0V wire at the corner of transformer, which is an odd place to join 3 x wires and a 100 Ohm resistor.
The awkward to access switches and 4 x LO coils:
The coil/switch unit is riveted to the hardboard panel that screws on inside front half of case.
The two mounts for the ferrite rod are separately riveted to the hardboard panel.
The main chassis is riveted to the hardboard panel.
The speaker is bolted on!
The B7G power socket is riveted to the hardboard panel.
The audio output transformer is curiously mounted on the hardboard.
Chassis views
The HT+ is connected from the B7G power socket direct to 1st IFT. This then feeds pin 5 DK96 screen grid where the main HT electrolytic (replaced) is on pin 5 to chassis. Earth tags are generally not used, just a very powerful iron and a pool of solder on the chassis, so when replacing parts it's best to leave enough old lead to solder on.
The mysteriously snapped SM cap lead. But not AT the connection!
You can see the odd value 220pF cap between DAF96 anode and DL96 grid. Got to be a manufacturing error, like the never soldered 0V wire at the corner of transformer, which is an odd place to join 3 x wires and a 100 Ohm resistor.
The awkward to access switches and 4 x LO coils:
The coil/switch unit is riveted to the hardboard panel that screws on inside front half of case.
The two mounts for the ferrite rod are separately riveted to the hardboard panel.
The main chassis is riveted to the hardboard panel.
The speaker is bolted on!
The B7G power socket is riveted to the hardboard panel.
The audio output transformer is curiously mounted on the hardboard.
Chassis views
The HT+ is connected from the B7G power socket direct to 1st IFT. This then feeds pin 5 DK96 screen grid where the main HT electrolytic (replaced) is on pin 5 to chassis. Earth tags are generally not used, just a very powerful iron and a pool of solder on the chassis, so when replacing parts it's best to leave enough old lead to solder on.
