{"id":1356,"date":"2018-09-26T20:53:32","date_gmt":"2018-09-27T03:53:32","guid":{"rendered":"http:\/\/philcoradio.com\/library\/?page_id=1356"},"modified":"2018-09-26T20:55:51","modified_gmt":"2018-09-27T03:55:51","slug":"how-to-isolate-ac-line-noise-hash-from-your-workbench","status":"publish","type":"page","link":"https:\/\/philcoradio.com\/library\/index.php\/shop-talk\/techniques\/how-to-isolate-ac-line-noise-hash-from-your-workbench\/","title":{"rendered":"How to “isolate” AC line noise (hash) from your workbench"},"content":{"rendered":"

[Contributed by\u00a0Randal (Texasrocker)]<\/strong><\/em><\/p>\n

As all us vintage-tube techs know, AC power transformers on the power-poles providing us AC power our homes & vintage radio repair benches can be “noisy”, especially if the neighbor down the street fires up his AC powered “crackerbox welding machine” working on his hotrod! Heres how you can fix that prob. Use a “dedicated” AC power-strip on your workbench for repairs & restorations of vintage tube radios. “Line Hash” from modern overhead AC lines create “noise & weird hums in vintage tube type receivers”, especially when the whole area in you neighborhood is using lots of electricity powering their appliances! Washing machines motors generate “RF” frequencies also if located nearby as do microwave ovens, TVs, etc!!!! Here is how to “isolate” your workbench. Take (2) .1 \/600 volt orange-drop caps, set them side-by-side. Twist one end of both caps leads together. Solder the connections and with a “single 18 ga wire” attach those “2 separate caps with leads twisted together to a good “earth ground” rod or water-pipes that is buried. Take each “separate lead” from each capacitor and attach a 120 volt plug ( old good salvaged male-end from lamp) via it’s ( 2-separate leads isolated from each other) to the other end of both capacitors. After ground lead is secure to earth ground, and your new “male end” AC plug is installed to each separate capacitor, plug it in to your power-strip on your workbench. ” AC Line Hash GONE”!!<\/p>\n","protected":false},"excerpt":{"rendered":"

[Contributed by\u00a0Randal (Texasrocker)] As all us vintage-tube techs know, AC power transformers on the power-poles providing us AC power our homes & vintage radio repair benches can be “noisy”, especially if the neighbor down the street fires up his AC powered “crackerbox welding machine” working on his hotrod! Heres how you can fix that prob. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1317,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1356","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/philcoradio.com\/library\/index.php\/wp-json\/wp\/v2\/pages\/1356","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/philcoradio.com\/library\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/philcoradio.com\/library\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/philcoradio.com\/library\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/philcoradio.com\/library\/index.php\/wp-json\/wp\/v2\/comments?post=1356"}],"version-history":[{"count":0,"href":"https:\/\/philcoradio.com\/library\/index.php\/wp-json\/wp\/v2\/pages\/1356\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/philcoradio.com\/library\/index.php\/wp-json\/wp\/v2\/pages\/1317"}],"wp:attachment":[{"href":"https:\/\/philcoradio.com\/library\/index.php\/wp-json\/wp\/v2\/media?parent=1356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}