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| Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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11th Oct 2017, 5:39 pm
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#21 |
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Dekatron
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 5,997
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Re: Rogers HG88 III Hum
The pot is for balancing the DC anode current. The gain will be down to the individual valve characteristics. A matched pair would be matched for both quiescent current and gm.
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11th Oct 2017, 6:31 pm
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#22 |
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Banned
Join Date: Dec 2013
Location: Middlewich, Cheshire, UK. & Winter in the Philippines.
Posts: 3,897
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Re: Rogers HG88 III Hum
The resistance of the two halves of the output primary will be different due to the different wire lengths used. But the impedance should be similar.
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11th Oct 2017, 6:53 pm
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#23 |
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Dekatron
Join Date: Oct 2003
Location: Southport Lancashire, UK.
Posts: 3,233
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Re: Rogers HG88 III Hum
It just sounds a bit "thin" to me but it could be my imagination.
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Paul |
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