[SignalOne] Capacitor Replacement

[Peter Sundberg]

Hello John,

I just changed one of the big caps in my CX7 (for the screen supply) 
as the original was beyond it's life span. The cap itself is a 
Sprague 150 mfd 450 VDC in a metal case. However, it sits inside a 
paper roll from which it can easily be taken out. So I just placed 
the replacement capacitor with similar mfd/VDC inside the paper roll. 
The new cap was of slightly different size so I glued it in place 
inside the paper roll using hot melt glue.

When put back in place you can not see that the original cap has been 
replaced. Maybe this suggestion will make it easier for you to find 
replacement high voltage caps for your CX7a.

As for the low voltage caps, mine are still ok, the audio is not 
hummy... yet.. :-)

73
Peter SM2CEW



At 08:37 2017-12-10, John Seboldt K0JD wrote:
>.
>It's been a while since I've used my resurrected CX7a, and it's 
>sounding a little "hummy" so it might be past time to replace electrolytics.
>
>I did do the power supply upgrade using modern 1 amp 3-terminal 
>regulators, so that was done years ago - forget whose it was, will 
>have to look at the pile of mod dcouments I got from various people. 
>Of course now I imagine some of the actual caps are no longer 
>available or hard to get - and of course the high voltage ones even harder.
>
>Any current online sources for a compendium of mod articles, upgrades, etc?
>
>John Seboldt K0JD
>Milwaukee, WI