>
>
>
>On Sat, 20 Feb 1999 05:43:15 -0800 Rich Measures <measures@vc.net>
>writes:
>>
>>> Last time I did this I used a piece of an old
>>>fiberglass fishing rod (the large end) and ran
>>>it through the resistors leaving about 3/4" extending
>>>on each end and then clamped the ends onto standoffs.
>>> On just about every alpha 77 I've worked on I've found
>>>some arc damage from the bleeders to the mounting bolts,
>>>don't like that method.
>>>
>>>Mark WB8JKR
>>>
>>Ä Good point. Through-bolt mtg. also blocks cooling air.
>
>
>Not if done by the mfgs book.
>
? Through-bolts require some sort of shouldered insulating washer at
each end. this tends to block air from moving through the inside.
>
>
>>100k wirewound resistors are known to have a high failure rate.
>
>Details please.
>
? Virtually all of the open failures I have seen or heard about have
been in high-values. Perhaps because the wire used is extremely fine.
>
>
>>If I wanted a Reliable bleeder for a 4kV C-filter supply, I would series up
8 to 10
>>Matsushita/Panasonic 100k-ohm, 3w MOF resistors on a piece of
>>perfboard and be done with it.
>>
>
>
>Absolute YUK ! 800K to 1M bleders..no way Jose.
>
? What is to be gained by using a 200k-ohm bleeder on a C-filter, Carl?
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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