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| Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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20th Dec 2017, 2:29 am
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Dekatron
Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 4,935
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Ge DC Amp working at 1.5V
Many years ago, Heathkit produced a GDO using a tunnel diode oscillator and I want to build a copy. This used a three-transistor meter-amplifier, using TI363 and 2N407 Ge transistors, with a supply voltage of only 1.5V; circuit attached. Needless to say, those devices are pretty rare now, so I'm wondering what I could use as alternatives. My limited stock of Ge transistors is mainly OC71's, OC81's and a few GETxxx's. Could anyone advise as to the using 71's for Tr1, 2 and 81 for Tr3, or good alternatives?
I might might use an alternative meter amp (op-amp with 9V supply?) later on, but think it will be interesting to start with an all-original config to begin with. Thanks B
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Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch. |
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20th Dec 2017, 8:53 am
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Guest
Posts: n/a
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Re: Ge DC Amp working at 1.5V
That will work.
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20th Dec 2017, 3:32 pm
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#3 |
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Dekatron
Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 4,935
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Re: Ge DC Amp working at 1.5V
Thanks Merlin.
__________________
Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch. |
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