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Old 25th August 2005, 01:47 AM   #1
diyAudio Member
 
Join Date: Jul 2005
Location: southern us
Default 5687 filament heater question

What is the proper pin 4,5,9, connections to run a 5687 at 6.2 volts?

My PT has a 6.2 Vac center tapped filament supply and plenty amps.

Is it, pin 4 & 5 shorted on one leg and pin 9 on the other?.etc

I just want to power up this experiment, I don't need regulation, or 12 V DC recitified now.

thanks,
dr._sleep

P.S. I should know this...so shoot me.
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Old 25th August 2005, 03:02 AM   #2
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Join Date: Jun 2004
Location: New York City
Default Re: 5687 filament heater question

Quote:
Originally posted by dr._sleep

Is it, pin 4 & 5 shorted on one leg and pin 9 on the other?.etc

almost... 5687 has a different pinout than 12A_7 types; the heater CT is on pin 8 (and section 1 plate is 9 and cathode is 6). but otherwise, yes, just connect 4 & 5 together and put the 6.3V between them and 8.
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Old 25th August 2005, 04:45 AM   #3
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Join Date: Jul 2005
Location: southern us
Just shoot me,

Thanks very much,

problem solved,

dr._sleep
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