<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Use a noise-gate. That is more or less the only thing able to handle this. You can do tons of service and adjustments and improvements, but in the end you will still fell that it is noisy, because:<div>a. the acceptable noisefloor was way different in the 1970s</div><div>b. more or less all the components have drifted since the 1970s, and you really do not want to swap them all out</div><div>c. a chorus is usually noisy because of the technique involved</div><div><br></div><div>So, yes: it is noisy with the chorus. I have one, and mine is noisy too. Still sounds great.</div><div><br><div><blockquote type="cite"><div><blockquote type="cite"><blockquote type="cite">I recently picked up a 70's Arp Solina String Ensemble. It has the button on the right cheek block to turn the chorus on/off and it is not the later version with LEDs.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">It's in pretty good condition, every function works and it sounds great, but there is, in my opinion, excessive noise and 'swooshing' when the chorus/modulation circuit is engaged. It is dead silent with the chorus turned off. Not a big deal when you are playing notes or chords, but enough to be annoying when it's idling.<br></blockquote></blockquote></div></blockquote><div><br></div></div><br><div apple-content-edited="true"> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Terje Winther</div><div><a href="mailto:terje.winther@wintherstormer.no">terje.winther@wintherstormer.no</a></div><div><a href="http://wintherstormer.no/">http://wintherstormer.no/</a></div><div><br></div><div><br></div></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"> </div><br></div></body></html>