IFR COM-120A Caps

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scotto
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Posts: 5
Joined: Wed Feb 08, 2012 6:05 pm

IFR COM-120A Caps

Post by scotto »

Hello,
I know about the capacitor plague, but which type of replacements do you recommend? There are so many varieties such as ESR, Tolerances, Temp. and so on.
bh7juo
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Posts: 32
Joined: Mon Sep 15, 2014 3:04 am

Re: IFR COM-120A Caps

Post by bh7juo »

Hello Ccotto,
I just replaced all polar capacitors to SMD tantalum capacitor on digital tray,some none-polar capacitors(10uF) I just kept them.

Mark
BH7JUO Mark
HF DX,test set repair,PCB design,MCU coding,DIY......still have not enough time
scotto
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Posts: 5
Joined: Wed Feb 08, 2012 6:05 pm

Re: IFR COM-120A Caps

Post by scotto »

Maybe wowbagger can help
crash
Posts: 29
Joined: Sun Oct 19, 2014 11:21 am
What radios do you own?: R2001C

Re: IFR COM-120A Caps

Post by crash »

I always go for the equal value capacitance, higher voltage rating, lower
tolerance, and better temp rating, if it isn't the highest rating already.

Of course, I use ceramic for ceramic, aluminum for aluminum, etc.,
or I may substitute aluminum for tantalum, and mica for ceramic, if the
value isn't available in the original type cap.

As long as I am improving the capacitor selection, like changing from
paper caps to poly caps, I have no qualms about changing the type of
capacitor.

I don't worry about the ESR or other figures, as those usually are better
today than 15 or 20 years ago. One thing I have noticed, the size of the
caps are getting smaller.
Jeff 'crash' Young N8CMQ
scotto
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Posts: 5
Joined: Wed Feb 08, 2012 6:05 pm

Re: IFR COM-120A Caps

Post by scotto »

Well then, I'm going with tantalums . ESR rating was the head scratcher. Off to replace caps and calibrate. Thanks for the info.
P.S. Does anyone have a good lead on the TDA1904 audio amp?
73's
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