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27th Nov 2006, 3:45 pm
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#1 |
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Pentode
Join Date: Oct 2003
Location: Alton, Hampshire, UK.
Posts: 137
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Ultimate DAC 90a dial lamps?
I just bought a couple of unrestored DAC90as at our local auction for £18. One had a cracked cabinet, so I am making one good one from the two. I hoped the cracked one would give me the now unobtainable dial lamps, but no, a separate 12 Volt transformer had been fitted to run two 6.5v bulbs! Cor!!
Nigel |
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27th Nov 2006, 9:11 pm
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#2 |
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Octode
Join Date: Jan 2003
Location: Ashby-de-la-Zouch (it's not by the sea)
Posts: 1,255
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Re: Ultimate DAC 90a dial lamps?
Now that's just plain cheating!
By the way, what was done to complete the old circuit then Nigel? Andy
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Now where on earth did I remove that from? |
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28th Nov 2006, 12:41 am
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#3 |
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Dekatron
Join Date: Jan 2003
Location: Bradford on Avon, Wiltshire, UK.
Posts: 3,310
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Re: Ultimate DAC 90a dial lamps?
I guess the lamp shunt resistor was simply left in place.
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"Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly." |
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28th Nov 2006, 5:22 pm
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#4 |
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Pentode
Join Date: Oct 2003
Location: Alton, Hampshire, UK.
Posts: 137
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Re: Ultimate DAC 90a dial lamps?
Yes, the old shunt resistor was left in place. This will have reduced the heater current somewhat, but it is a small proportion of the total series dropper resistance.
Nigel |
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