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Rockola Jukebox
Rockola Jukebox
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Old 14th September 2021, 08:21 AM   #1
Radioworld is offline Radioworld  United Kingdom
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Default Rockola Jukebox

Hi All as a hobby i restore Valve sets mainly from the 30s I have used blue tooth receivers which work well to give them a new lease of life using the gram input

A friend recently asked us to take a look at his Rockola Jukbox sufferings from distortion. Itís been restored in the past the fault was found just to be dirty pre amp valve base. I used a my bluetooth receiver into the amp and the sound was was very good. But switching inputs has been a problem. I tried audio relays and using a 4066 audio chip but the sound quality wasnít great so not sure if itís possible. Also the amplification from the bluetooth device has reduced yet itís ok from the phono input any advice would be appreciated
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Old 14th September 2021, 08:44 PM   #2
egellings is offline egellings  United States
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Can't help you with your problem. Rockola was actually the name of the company's founder!
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Old 15th September 2021, 01:03 AM   #3
jhstewart9 is offline jhstewart9  Canada
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Default Rockolab Amp

PP 6B5's
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Old 15th September 2021, 03:56 AM   #4
jhstewart9 is offline jhstewart9  Canada
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Here is a better image.
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File Type: jpg PP 6B5 amp rockolab.JPG (227.1 KB, 116 views)
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Old 16th September 2021, 09:49 PM   #5
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
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The 4066 needs that inputs and outputs float over VDD/2 for proper biasing. Did you do such a job?
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Osvaldo F. Zappacosta. Electronic Engineer UTN FRA from 2001.
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Old 16th September 2021, 11:03 PM   #6
jhstewart9 is offline jhstewart9  Canada
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Default Link to Rockola Schematics

Index of /2-SCHEMATICS/Music-amps/Rock-Ola
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