Definitely do the bleeders too. I would also consider laying a slow turning
fan on the top to assist in drawing out the hot air. I just place four
little rubber bumpers on a 4 fan (so it doesn't scoot) and run it at about
half voltage. Heat buildup is your enemy.
Dennis AE6C
On Thu, Oct 1,
I picked up a L7 from ebay. The amp itself looks to be in excellent condition
but the power supply is a different story. It looks like someone started to
take it apart to rebuild the boards but they only got as far as removing one of
the boards. Before I try to rebuild the existing boards (I
Hi Brian,
As far as I know, Heath and Harbach boards are the same. Be careful with
hardware and make sure that there is enough space between surrounding
components to prevent arc over. Be sure and change the resistor in the bias
circuit. Can't lay my hands on my instructions right now,
Brian,
I've done Mike's (The Heathkit Shop) rebuild. 1st rate, clear
instructions, pretty simple. Replaces most everything but the 50K
bleeders and the bias resistor. Jeff at Harbach has those
available. I'd do those also.
Rick
W9WS
On Oct 1, 2009, at 8:41 PM,
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