UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Capacitor Selection Pi-Section Smoother.

Takapuna · 3rd Mar 2021, 9:49 pm

Thanks to everyone for continuing to take an interest and for all the new ideas.
I'll take some time out to reconsider the design and look at the information in the various links.

However, a couple of years ago I bought 2x 20H/460R/75mA chokes of the "affordable" variety (hence the high resistance?) and recently have acquired 47uF/500V capacitors. I'm tempted to go with these as I've spent the money already. The CRCRC arrangement would be cheaper I agree.

Craig's first post had me a little worried, but the design was not going to be a true choke-input filter. After my discussion regarding making the reservoir small to reduce the strain on the rectifier it's tempting to use 47uF as the EZ80 is happy with this value and be done with it.

Let's see. Whilst a split box design that can easily be carried anywhere by two persons might appeal to me, it does not score so highly with my Wife regardless of how good it may or may not sound!

Regards,

Phil
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3rd Mar 2021, 9:49 pm	#17
Takapuna Tetrode Join Date: Jul 2009 Location: Derby, Derbyshire, UK. Posts: 57	Re: Capacitor Selection Pi-Section Smoother. Thanks to everyone for continuing to take an interest and for all the new ideas. I'll take some time out to reconsider the design and look at the information in the various links. However, a couple of years ago I bought 2x 20H/460R/75mA chokes of the "affordable" variety (hence the high resistance?) and recently have acquired 47uF/500V capacitors. I'm tempted to go with these as I've spent the money already. The CRCRC arrangement would be cheaper I agree. Craig's first post had me a little worried, but the design was not going to be a true choke-input filter. After my discussion regarding making the reservoir small to reduce the strain on the rectifier it's tempting to use 47uF as the EZ80 is happy with this value and be done with it. Let's see. Whilst a split box design that can easily be carried anywhere by two persons might appeal to me, it does not score so highly with my Wife regardless of how good it may or may not sound! Regards, Phil ----