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 An AM tuner with a magic eye and wax caps
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 Return to top of page · Post #: 1 · Written at 10:50:07 AM on 16 January 2016.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 1313

Here is a AM radio tuner I made using octal valves, wax capacitors, carbon resistors and a Magic eye indicator. I housed it in a "weird" looking cabinet.

AM Valve Tuner with Magic Eye


 
 Return to top of page · Post #: 2 · Written at 3:16:34 PM on 23 January 2016.
Art's Gravatar
 Art
 Location: Somewhere, USA
 Member since 22 October 2013
 Member #: 1437
 Postcount: 896

Hi Fred, that’s something else!
Why would you go for old discreet components for a new project? That boggles me a little Grin


 
 Return to top of page · Post #: 3 · Written at 6:36:08 PM on 25 January 2016.
Fred Lever's Gravatar
 Location: Toongabbie, NSW
 Member since 19 November 2015
 Member #: 1828
 Postcount: 1313

Hi Art, the wax caps were part of the challenge!
You will notice that I tried to use parts as old as the valves.
I wanted to understand how these old components react in circuits and work together.
If I used new resistors and capacitors I might as well use transistors or build a SC kit from Jaycar!
So long as you understand the effect of series and parallel resistance inside the caps you find the old caps work fine.
Go for it, take the challenge build something with old parts and experience the thrill of smoking leaky old caps and crackly carbon resistors!

Cheers!


 
 Return to top of page · Post #: 4 · Written at 7:06:43 PM on 27 January 2016.
Art's Gravatar
 Art
 Location: Somewhere, USA
 Member since 22 October 2013
 Member #: 1437
 Postcount: 896

I take up that challenge often (look around in this area a bit) Grin
Just that the old parts aren’t caps or resistors.
I don’t think there would be any functional difference other than accuracy,
but can understand why you might consider the new parts look out of place.

Nice job in any case Smile


 
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