Televideo 970

[Jules Richardson]

On 01/23/2018 09:54 AM, Aaron Jackson wrote:
>
>> 1) The EMI filter had gone open-circuit - it's one of those metal can types
>> which is integrated with the IEC power input connector. Are these still
>> obtainable anywhere? It seems like equipment these days just has the
>> filtering directly on the PSU board, rather than as a separate module. I've
>> just bypassed it for testing, but I don't want to leave it like that.
>
> You can still get these. The hard part is finding one which will fit
> properly unless you are willing to bodge it together a bit. Just search
> for "C14 EMI" on eBay and you'll find hundreds of them. Maybe you've
> seen them already and were just surprised by how small they have become :)

Ha, no... I'd actually not looked into it, I just assumed they were 
long-gone because I'd not seen one used in anything for *years*.

The one in the Televideo is surprisingly compact, given the age - around 1" 
wide, 3/4" high and 2" deep (including the solder points). It looks like I 
should be able to find a replacement easily enough, though (I'm assuming 
that the internal component values aren't particularly critical, and it's 
just a case of finding something with enough max current rating)

> You can also just remove it, and (safely) wire in a fixed power cord.

Yes, right now I just grabbed a panel-mount IEC connector from a junk PC 
PSU and wired that up while I'm testing, I think long-term though I'd 
prefer to do it right; it won't make any difference to the terminal, but it 
might make other gadgets plugged into the same AC feed a little happier. :-)

cheers

Jules