https://archivedforum.beoworld.org:443/forums/29.aspxHave a specific BeoGram Record Deck related question? Ask here.enCommunityServer 2008 SP2 (Build: 31104.93)https://archivedforum.beoworld.org:443/forums/thread/353726.aspxWed, 11 Jan 2012 18:12:39 GMT41a2a90c-3a1e-4bd3-b144-3883695a7f38:353726denverbob0https://archivedforum.beoworld.org:443/forums/thread/353726.aspxhttps://archivedforum.beoworld.org:443/forums/commentrss.aspx?SectionID=29&PostID=353726<p>I posted this problem last month but the ansewers that I received (thank you both very much) indicated that I had failed to make myself clear.</p> <p>I have three turntables with moving iron cartridges.a B&amp;O 3404, a Denon 62L and a VPI with EPA tonearm</p> <p>I have two preamps with phono inputs...a very vintage Marantz 7T and a 12 year old Coda Fet01</p> <p>All three tables are dead silent with the Marantz 7T and an equally old Marantz receiver in my bedroom</p> <p>The denon and VPI are dead silent with the Coda</p> <p>The B&amp;O produces a very very very loud hum with the newer Coda when the 3404 is turned on but is dead silent when playing LPs</p> <p>When the recording ends the very very very loud hum comes back and continues as the arm returns to its resting position </p> <p>The hum does not cease until the 3404 is turned off</p> <p>This 3404 does not have a built in phono pre</p> <p>HELP !<br />please</p> <p>Bob</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>It does have a ground wiire that attaches to the preamps</p> <p>&nbsp;</p><div style="clear:both;"></div>