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| Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
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20th Sep 2011, 2:42 pm
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#1 |
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Pentode
Join Date: Sep 2011
Location: Skegness, Lincolnshire, UK.
Posts: 103
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Bell & Howell 636 16mm Projector
Can anyone help with a circuit diagram of the amplifier.
This is a 240 volt ac/dc projector using 1 x EF86, 1 X ECC83 and 4 x UL84 valves. Very interesting circuit as 2 of the UL84's are a switch mode power supply supplying the exiter lamp supply and the 6.3 volt heater voltage for the first 2 valves. Any help with a circuit much appeciated. Eric |
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20th Sep 2011, 5:27 pm
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#2 |
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Dekatron
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,088
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Re: Bell & Howell 636 16mm Projector
Can't help - but thanks for this info! It rather beats the 601 amplifier which used a single 6V6 as a HF oscillator to drive the exciter lamp only.
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20th Sep 2011, 6:56 pm
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#3 |
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Rest in Peace
Join Date: Apr 2008
Location: London, UK.
Posts: 2,508
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Re: Bell & Howell 636 16mm Projector
I'm fairly sure I have a schematic if not a manual, will report back...
Lucien |
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20th Sep 2011, 8:11 pm
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#4 |
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Pentode
Join Date: Sep 2011
Location: Skegness, Lincolnshire, UK.
Posts: 103
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Re: Bell & Howell 636 16mm Projector
Thanks Lucien.
Last edited by Station X; 20th Sep 2011 at 10:22 pm. Reason: Earlier post corrected. |
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