**THE-RFI-EMI-GUY** wrote:
There is also the: JPS ANC-4 Noise Canceller
http://www.jps.com/downloads/support/anc4man.pdf
gwatts wrote:
....
I have a Timewave ANC-4,
http://www.timewave.com/support/ANC-4/anc4.html

They're the same, from
http://www.universal-radio.com/catal...amps/0094.html
'The ANC-4 was originally developed by JPS, but is now being
manufactured exclusively by Timewave.'

I got mine on eBay.