{"product_id":"airline-model-8500-vintage-2x12-tube-amplifier-used","title":"Airline Model 8500 Vintage 2x12 Tube Amplifier - USED","description":"\u003cp\u003eUsed vintage amp in good condition.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eFrom Bob THE Amp Tech:\u003c\/span\u003e \u003cem\u003e\u003cstrong\u003eReally cool old tube combo sold by Wards (when that was a thing). The power supply caps were replaced with modern devices not too long ago. This is prolly why the amp sounds so nice. I swapped the copper rectifier for a true tube 5y3gt and found that the sound of the amp was cleaner, less dirt. On review, the coppoer recitifier intentionally 'browns' out the amp a bit.  I will leave the copper rectifier in place as it sounds pretty nice. \u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eDuring initial bench test, the tremolo was not working at all.  Just a bit of extra noise when turning up the 'intensity' knob. The tremolo circuit has an old tube and the original caps. I replaced the caps and updated the tube since I have one in stock. The tremolo started up with new caps, but was pretty weak. After tracing the circuit and checking I determined that one of the Bias resistors (330k R17) had gone bad. Replaced w a new 330k resistor and the tremolo sprang to life. \u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003e Amp is very cool and ready for return to playing. \u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eOriginally designed and created by Danelectro for Montgomery Ward.\u003c\/p\u003e\n\u003cp\u003eCollar City Guitars is a Preferred Reverb Seller, buy with confidence!\u003cbr\u003e-------------------------------------------------------------\u003cbr\u003eSold on Consignment\u003c\/p\u003e","brand":"Airline","offers":[{"title":"Default Title","offer_id":45088276709576,"sku":"2600566","price":789.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/4677\/9336\/files\/IMG_1588.jpg?v=1780681408","url":"https:\/\/collarcityguitars.com\/products\/airline-model-8500-vintage-2x12-tube-amplifier-used","provider":"Collar City Guitars","version":"1.0","type":"link"}