where can i find variable air capacitors" Australia

[telluric42]

hi all

getting all my parts together for my next project and looking for variable caps to tune the tank circuit. i have scavenged a few TVs but they only have small ones.

looking for 100-400pf or so.......not sure the going prices

i was also thinking of getting a ganged one maybe 2 or 3 and wire them up in series to increase the max voltage........has anyone tried that

even old appliances that i could scavenge them out of would be a great help

I'm in Australia

thanks

[onthecuttingedge2005]

you could always find somebody with a CNC mill and have one made for you.

[gyulasun]

On ebay you can find some:

http://cgi.ebay.co.uk/2-Gang-Variable-Air-Capacitor_W0QQitemZ150393976910QQcmdZViewItemQQptZUK_BOI_Electrical_Components_Supplies_ET?hash=item23042df84e

http://stores.shop.ebay.com.au/KW-TUBES_Variable-capacitors_W0QQ_dmdZ2QQ_fsubZ7QQ_sasiZ1QQ_sidZ17107114QQ_trksidZp4634Q2ec0Q2em322

rgds, Gyula

[the_big_m_in_ok]

hi all

getting all my parts together for my next project and looking for variable caps to tune the tank circuit. i have scavenged a few TVs but they only have small ones.

looking for 100-400pf or so.......not sure the going prices

Unfortunately an American do-it-yourself electronics magazine (Popular Electronics?) had an article many years ago of how to hand-build 365 pF broadcast band radio variable caps from simple and available parts.

Is there a large library near your residence that has back issues of electronics magazines?  Especially English ones?  The English are avid tinkerers.

--Lee

[e2matrix]

Very old car radios also had them - in fact any old radio like 50's or before probably will have them if you can find them.