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Author Topic: SS Rectifier sub for my GBC-610-E?  (Read 2887 times)
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N6YW
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« on: September 08, 2014, 01:08:08 PM »
Greetings

I was given several boxes of goodies and amid all of this, I have a pair of International Rectifier ST-7A solid state replacements for the 866A. Should I consider using them for my BC-610E?
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w1vtp
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« Reply #1 on: September 08, 2014, 01:25:45 PM »
Quote from: N6YW on September 08, 2014, 01:08:08 PM
Greetings

I was given several boxes of goodies and amid all of this, I have a pair of International Rectifier ST-7A solid state replacements for the 866A. Should I consider using them for my BC-601E?


If they are appropriately rated, they'll work fine.  Just be advised that you will see a voltage increase.  Not as much as SS'ing a vacuum tube rectifier.  I think the voltage drop across mercury vapor rectifiers is ~ 15 volts.

Al
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N6YW
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« Reply #2 on: September 08, 2014, 01:37:27 PM »
Al
Thanks. I am cautious about SS'ing the BC-610-E because it is original. There has always been talk about updating the plate power supply on these rigs, but is there much to gain from this? It's my understanding that doing so should also involve updating the entire design of the plate supply. Currently, I am running 3B28's and they seem to work just fine.
73 de Billy N6YW
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Pete, WA2CWA
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« Reply #3 on: September 08, 2014, 04:18:21 PM »
You gain less heat from the power supply and less drain on the filament supply. If you're happy with the 3B28's leave them in place and save the ST-7A's for a rainy day.
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Jim, W5JO
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« Reply #4 on: September 08, 2014, 05:58:50 PM »
I think that rectifier is good for 7 KV at about 500 ma.  For my money it is marginal at best.  You can determine the voltage drop with a voltmeter and a 9 volt battery.  Or if you prefer series two batteries and measure the drop.  Usually a 10 KV SS plug in will have about the same drop as an 866 and you would have more of a safety margin.
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N6YW
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« Reply #5 on: September 09, 2014, 12:01:40 PM »
Quote from: Jim, W5JO on September 08, 2014, 05:58:50 PM
I think that rectifier is good for 7 KV at about 500 ma.  For my money it is marginal at best.  You can determine the voltage drop with a voltmeter and a 9 volt battery.  Or if you prefer series two batteries and measure the drop.  Usually a 10 KV SS plug in will have about the same drop as an 866 and you would have more of a safety margin.

Thanks
I think 7KV is safe for a BC-610. For now, I'll keep them as spares.
73 de Billy N6YW
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