Jack b

Definitely a bit late to the party.... if there ever was one Your SAB module is incredibly simple. It looks like it's got a very simple charging circuit in the form of a diode traced in series with a resistor used to limit the current in order to charge the nickel cadmium battery correctly. If i remember, that nicad has a 280mA capacity so youd need roughly around 10% of the capacity of the battery in current to charge it. So you'd need to calculate a resistor that can limit the current to 28mA. This will provide a trickle charge That relay is simply just switching the battery to the bell when de energised, and it's N/O contacts is energising the charging circuit. The tamper switch contacts are simply wired from the negative hold off to the tamper return terminal. Then the N/C side is bridging between the negative hold off and the negative of the bell. I'm assuming this is for a 24hr tamper In the form of locally sounding the bell.

Any recollection on the SCB module inside the maxim alarm box's? I was told ages ago that it was a small transistor module fitted underneath the alarm bell?

These detectors will be probably from the 1960s, the circuit board is made out of phenolic which was obsolete by the late 1960s with most circuit boards being made from a fiberglass material. not to mention the strowger 600 type relay being used. Also those bakelite terminals.

Hi, bit of a long shot as these panels are very old and most are probably skipped; but does anyone still have a modern automatic alarms traffic light panel? And are willing to sell it? It's a hammered silver panel with a sidleen barrel key switch and its distinctive red, yellow and green lamps fitted to the top of the unit.

They are pretty modern looking, brocks seemed to always be ahead of the game. Look at two of the most well known companies in the industry, AFA and rely a bell; they were still hard wiring telephone relays whereas Brocks had circuit boards with transistorised circuits with built in bandit circuits and such. I've seen the diagram for the PC panels that came out around 1965/66, very very fancy technology wise for the time.

Here's one

Yes. The original brocks alarm bell cover from 1962 to around 71 were gold coloured.

Old that is. 1972 I think these came out after they stopped using the gold brocks.

That looks like an old AFA panel. Usually they had those bell relays and the sigma low relay in a blue AFA drum fitted inside the premises. Are there any more photos of this system?

Nah, do it for enjoyment