Since your are looking in E-bay look there, should find some of then .
wrote in message
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I am considering bidding on this gear, are 572B tubes hard to find
and are they expensive?


http://cgi.ebay.com/ws/eBayISAPI.dll...ategory=46 71

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Build your own amp.
http://electronickits.com/kit/plans/cbradio/cbradio.htm