<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div><div class="ydpc07784e2msg-body ydpc07784e2P_wpofO ydpc07784e2iy_A" data-test-id="message-view-body-content"><div class="ydpc07784e2jb_0 ydpc07784e2X_6MGW ydpc07784e2N_6Fd5"><div><div id="ydpc07784e2yiv2954669291"><div><div style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;"><div>Folks, I have a question. My SB 220 amp has filaments and HV. BUT, when amp is turned on, the plate meter goes negative slightly and softly. In addition, grounding the relay jack does not key up the amp. No relay pull in or click and no resting current on finals.</div><div><br></div><div>I replaced the diode that provides relay voltage thinking the relay supply might not be providing voltage.</div><div><br></div><div>I am puzzled because the relay keying circuit is simple but given the negative movement of the plate meter makes me wonder if something is wrong on the rectifier/metering board.</div><div><br></div><div>73, John, K5PGW</div></div></div></div></div></div></div><div class="ydpc07784e2jb_0 ydpc07784e2X_6MGW ydpc07784e2N_6Fd5"></div><!-- react-empty: 7700 --><br></div></div></body></html>