{"product_id":"1920s-marconiphone-nb1-single-stage-voice-amplifier-wk-1743","title":"1920s Marconiphone NB1 Single Stage Voice Amplifier Wk 1743","description":"\u003ch1\u003e1920s Marconiphone NB1 Single Stage Voice Amplifier Wk 1743\u003c\/h1\u003e\n\u003cp\u003eThis is an early version of the crystal set radio \/ wireless 1920s Marconiphone NB1 Single Stage Voice Amplifier Wk 1743.\u003c\/p\u003e\n\u003cp\u003eThe sockets for the 'phones and battery (not included) are on the rear of the wood case. I think this is a type NB1 amplifier used with a Marconiphone V2 Radio Receiver. \u003c\/p\u003e\n\u003cp\u003eIn good untested and original condition, the voice amplifier comes with two 2-pin sockets and a handset.\u003cspan style=\"text-decoration: underline; color: #ff2a00;\"\u003e It is sold as a collectible for display only. \u003c\/span\u003eThe external wood has a few blemishes and some damage on the rear base. \u003c\/p\u003e\n\u003cp\u003eThe labels give the following information:-\u003c\/p\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003cem\u003eBBC approval by the Post Master General\u003c\/em\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003cem\u003eGPO Registered No. 3285\u003c\/em\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003cem\u003eMarconiphone Co. Ltd London\u003c\/em\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\n\u003cem\u003eMarconiphone \u003c\/em\u003e\u003cem\u003eVoice Amplifier Single Stage\u003c\/em\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003cem\u003eInstrument Number Wk 1743\u003c\/em\u003e\u003c\/div\u003e\n\u003cdiv style=\"padding-left: 30px;\"\u003e\u003cem\u003e\u003c\/em\u003e\u003c\/div\u003e\n\u003cp\u003eThe B.B.C., Marconiphone, and G Marconi transfers are still intact.\u003c\/p\u003e\n\u003cp\u003eIn the early days of radio broadcasting an amplifier was required for magnifying the music or speech received by the detector sufficiently to operate a loud speaker.  This is a rare survivor from that period and perfect for radio history aficionados!\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-domestic-military-amateur-radios-and-radio-equipment\" target=\"_blank\"\u003evintage radio.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThe images have been taken with and without flash hence the differences in colour.\u003c\/p\u003e","brand":"Marconi","offers":[{"title":"Default Title","offer_id":43684626727169,"sku":"","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/1920s_Marconiphone_NB1_Single_Stage_Voice_Amplifier_Wk_1743.jpg?v=1728404125","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/1920s-marconiphone-nb1-single-stage-voice-amplifier-wk-1743","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}