[R-390] Corcom 3ED1 filter

[Barry]

... or you could make an adapter plate with no cutting on the back required.

Thanks,
Barry - N4BUQ

----- Original Message -----
> From: "Perry Sandeen via R-390" <r-390 at mailman.qth.net>
> To: r-390 at mailman.qth.net
> Sent: Tuesday, April 18, 2017 6:45:54 PM
> Subject: [R-390] Corcom 3ED1 filter
> 
> Good news my fellow Heretics!
> The Corcom filter screw mounting holes are an an exact match for the OEM
> filter.
> Now it's true (close your eyes purists) that you will have to cut the OEM
> round hole to a rectangle to inset the filter. but the filter covers the top
> and bottom of the hole so it's hardly noticeable.
> Now you have the chance to repair on OEM wiring configuration that does not
> meet current (pun intended) standards.
> The "Hot" wire should be attached to the on-off switch.through the fuse.
>  AFAIK both the "A" and our sister receiver, the SP 600 originally had the
> fuse on one side of the input and the switch on the other.
> There are several benefits to do this upgrade.  First if you lose your
> dedicated green ground, you won't get nasty tingle, or worse, if you'd
> touched the chassis and a true ground.  Next the filter allows you to use a
> standard computer cable instead of the usually found funky power cord
> connections.
> One gains space to be able to replace that bathtub electrolytic used on the
> RF gain control.  It most likely has high leakage being around 50 years old.
>  Additionally there is now space to install a CL 90 thermistor for a slow
> warm-up and will have open space so it does't cook anything when it heats
> up.
> Now if it does't bother your conscience, you can sell it on ebay for more
> than you paid for the Corcom, (Not recommended)
> Regards,
> Perrier
> 
> 
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html