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I think the blades are one sided edge style connections made of PCBoard material. I could not find a photo showing the other side of those blades. That would...
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The tear down article referenced in post #24 seems to indicate that there are 2 contacts on each of the + and the - blade contacts. Therefore, it's likely...
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Agreed. The presence of a thermal fuse would be a likely possibility but the schematic depiction is goofy. If it is a thermal fuse then maybe this is a case...
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I've also got enough stuff. We have been establishing "no gift" agreements with relatives for decades now. The company of good friends and their...
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I got a new blanket and a really good pair of socks.
That would have been a bad Christmas when I was a kid but it was just what I needed this year....
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Transformer Schematic Symbol
The transformer primary winding, as shown on the referenced schematic, includes what looks like a resistor symbol...
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One of those would work . You will need to mount it in a suitable enclosure that will allow for convection cooling. You can check if the supplier offers mounting...
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I remember that Heathkit used to sell a dummy load built into a 1 gallon paint can filled with oil. IIRC it was an RF load meant to take the place of an antenna....
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I guess I remembered the definitins incorrectly. I can follow the link to the 6V6 data sheet but I can not find the "school me" thread. Can you...Last edited by Reader; 12-26-2018, 03:05 PM. Reason: Fiexed unintelegable typos made while falling asleep on the couch after Christmas dinner.
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OK 18.25÷488=37ma current. The plate to cathode voltage is 332-18.25=313.75. Therefore the tube dissiation is 313.75×.037=11.6W
This is 97%...Last edited by Reader; 12-26-2018, 01:03 AM.
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I don't know about that bias calculator and to really calculate the dissipation we need some more information. Did you end up with the 680 Ohm cathode resistor...Last edited by Reader; 12-25-2018, 10:42 PM.
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Yes. But see the resistor data sheet and note that the 100W rating only applies when the resistor is properly mounted on a suitable heat sink. Without the...
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I see a lot of the past bad workmanship. I'm thinking that you may be able to clean that up and then continue to use the existing fuse holders.
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I have some initial observations and questions
I'm not sure what you mean. Can you explain the "short" you see. Your first photo shows...
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And each of the two pins is hot just as would be the case for USA equipment running on 240VAC. In these cases, there is no "neutral" and DPST mains...
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I agree that best practice is to use DPST power switches. My point in starting this thread though was to discuss the best wiring practice for amps in the...
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The USA color code does cause confusion here too when "electronic" types try to be "electricians" and work on their house wiring. It takes...
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I think we have different perspectives regarding the USA wiring code and that which you use. In the USA the black line lead is "Hot" and the white...
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