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Mullard 6L6 Heathkit IP-17

1/18/2005 7:48 PM
Mullard 6L6 Heathkit IP-17
Hey there. I just started a job in a college physics lab. This place hasn't changed in 30 years....My first duty was to test the output voltage of these old Heathkit power supply units..They have 30 of them...Imagine my surprise when I opened it up and saw a pair IEC, made in Great Britain, Mullard 6l6GC's?  
Is anyone else familiar with these things? Are they Amplifiers? 'cause I hate the thought of 19yr olds "playing" with them....I think I will make it my duty to supervise and protect them.....I will pay extra carefull "supervision" to any of the young ladies using these units........Tough job huh?????
1/18/2005 9:15 PM

Time to change out the tubes! put some sovtek 6l6's in there and save the Brits!  
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1/18/2005 9:16 PM

yeah i have a power supply similar. it goes to DC 400v @ 150ma and 6A at 6.3v AC? rip them tubes out of there!! put in some 5881 or sumtin. cant let nimrod students even breathe on those tubes....  
1/19/2005 1:08 PM
Dr. Photon

Those are regulated high voltage power supplies. The 6l6's are used as a series-pass device. They also have a -100 volt adjustable B- supply at diddly squat current and 6.3 v at a few amps. I went to a "Physics day" thing and they used one to power up a CRT-demonstation thing. Then I proceeded to boast that I had a more powerful 150ma (300 surge) 0-450 volt transistorized unit (w/ built in variac, and regulated bias, and 0-40 volt current limited transistor supply, also "featuring" 70's "styling").
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