Most push into a socket. Tell me the tube number and I can tell you for sure. What does the '403' refer to? Dick Benjamin ----- Original Message ----- From: "Dave & Tracy" <dave-tracy.sherratt@xxxxxxxxxxxx> To: <L-ForwardLook@xxxxxxxxxxxxx>; <mailing-list@xxxxxxxxxxxxxxxx> Sent: Tuesday, November 25, 2003 11:44 AM Subject: IML: 403 radio valve Hi is a radio valve a push in fit or is it soldered, direct to the mother board. Thanks Dave.