Bc-1000

Radio Telephone and Telegraph Transmitting and Receiving Equipment
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stinson
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Bc-1000

Post by stinson » Tue Jan 16, 2018 9:23 pm

Have a bc-1000 radio that was in working condition. I believe we blew a or some tubes due to incorrect polarity. My son crossed positive and negative while hooking up the power unit. I live in WA state does anyone know someone that works on these?


Radtech
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Re: Bc-1000

Post by Radtech » Wed Jan 17, 2018 3:06 pm

The only way you could have damaged it is if you put the high voltage to the filaments burning out all of the tube filaments.Just reversing the polarity of the correct voltages will not damage the set.What power unit?If it is one of the commercial transistor units you may have fried the power supply.If you were using the PP-114 power supply reversing the polarity of the supply voltage would not damage anything the unit would just not operate.

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Re: Bc-1000

Post by W. Winget » Thu Jan 18, 2018 9:08 am

Basic power check, if you reversed it, a fuse may have blown, pull the cover and check where the power enters the unit. Typically these will be glass for older units, if it is blown, 1st replace that before going on with additional work.
There may be schematics in the manual, contacting someone on Radio Nerds would possibly yield a board where a local person lives that can work on radios.
Any old TV repair shops in your area? they may be able to do the basic functions checks as well.
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Re: Bc-1000

Post by Radtech » Thu Jan 18, 2018 4:25 pm

If he was using one of the commercially available transistorized power supplies reversing the current more than likely damaged the power supply with no affect on the radio.There is really not enough information in his post.Antique radio and TV guys normally will not touch a military receiver transmitter as they are for the most part illegal to operate even with a ham license.

stinson
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Re: Bc-1000

Post by stinson » Thu Jan 18, 2018 10:14 pm

We opened and looked for a fuse that might be blown but everything inside seems to be solid, no glass fuses or anything that looks like it's suppose to be removable:(

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Re: Bc-1000

Post by Radtech » Fri Jan 19, 2018 7:13 am

What are you using for a power supply?

stinson
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Re: Bc-1000

Post by stinson » Fri Jan 19, 2018 10:21 am

6 volt rayovac battery with a 6 volt inverter we got from a guy in italy

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Re: Bc-1000

Post by Radtech » Fri Jan 19, 2018 12:09 pm

OK if you reversed the polarity on that power supply you more than likely damaged it and not the radio.I always recommend people first build a power supply with 17ea 9v and 3 D cell batteries before buying an electronic power supply.The batteries are cheap as are the battery connectors which can be wired in series for the 150v and tapped at +90v plate voltage and 3 D cells for the 4.5v filiment voltage.US made sets seldom work without repair as the last one was manufactured in 1945 while the French made sets from 1956-1963 usually work.


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