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F 100 Iron

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socooooo23

Post subject: F 100 Iron

Posted: Thu Nov 26, 2009 1:25 pm

Joined: Thu Nov 26, 2009 1:13 pm
Posts: 1
Location: Dana Point ca

Built a Lightning with AO 35 Iron and i love it ! But my new project useing Hammond F 100 iron with 300- 300 taps . I get a low volume Overdrive sound and the Master isnt working . I.m not useing the 22\22K from pin 9 of the power Tubes . I,ve noticed that all Lightnig power trannys are 285 or 290 is 300 to high?

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disconnector

Post subject:

Posted: Tue Dec 01, 2009 9:31 pm

Novice

Joined: Thu Nov 26, 2009 11:51 pm
Posts: 50
Location: Richmond, Va

I built a Lightning circuit into a gutted Carvin Vintage 30 for a friend. The PT put out about 310V after SS rectification and a minimal RC network.. It sounded super harsh to me, but not overly gainy. A little zener string knocked the B+ down to a nice 285V and it warmed right up - or at least as warm as Carvin's crappy OT would let it get.

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coco

Post subject:

Posted: Thu Dec 03, 2009 8:02 am

Holy Ghost

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada

300 is a bit high. As suggested, use a 5W zener on the B+ to drop it 20V or so. You should use the schematic as drawn including all the 22K resistors.

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