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bobhowe 29th Jul 2021 6:56 pm

BEC Capacitors
Moderators if in the wrong section please move it Hi i see Bush used 32/16 MFD BEC Capacitor in there DAC90 Radios how long would it have been after the capacitor had the date written on it for it been installed to a radio

Radio Wrangler 29th Jul 2021 7:25 pm

Re: BEC Capacitors
There is no way of knowing. It depends on whether they operated a careful stores policy of keeping batches together and using oldest first. If they just tipped new arrivals loose into a bin, old ones could hide in bottom corners for some appreciable time.

Not all capacitors will have been bought from the same makers, not all will be date-stamped.


thermionic 29th Jul 2021 7:41 pm

Re: BEC Capacitors
Hi Bob.

With the huge amount of DAC90A’s produced, I would imagine that those components would have been manufactured, delivered and on the radios production line in a very short space of time.

It seems that a large proportion of DAC90 production used these BEC (British Electrolytic Capacitors) in this position.

......And they’ve proved to be a good quality, long lived item, too!



bobhowe 29th Jul 2021 8:14 pm

Re: BEC Capacitors
Hi David all the DAC90A that i have seen have had BEC capacitors apart from my 1950 DAC90A chassis it has a Radio Spares Capacitor with no date on it must have been replaced in the 70s as the wiring to it had been changed as well . Hi Simon Bush must of had a supply contract with BEC for smoothing Capacitor as well as TOC for the waxies you are right about BEC been good Quality and long lived kind regards Bob

stitch1 30th Jul 2021 8:00 am

Re: BEC Capacitors
As shown here my DAC90A has a date of 1955.
In the forces I thought I'd been told the date was the 'best before' on the shelf but maybe that was a date on a label not the component its self.


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