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They sell them in the local Home Depot, appliance bulbs and halogens bulbs.


On 4/13/2024 6:23 PM, Michael Yellin wrote:
> I can't believe how difficult it is to find an incandescent bulb.? Gotta wait
> to get one from Ebay.
>
> On Mon, Apr 8, 2024, 9:27?PM Michael Yellin via <>
> <michaelhq54=[email protected]> wrote:
>
>? ? ?Will do.? Thanks for the offer, I plan to take you up on it.
>
>? ? ?On Mon, Apr 8, 2024 at 4:43?PM Peter Gottlieb <hpnpilot@...> wrote:
>
>? ? ? ? ?Try starting with a 60 Watt incandescent.
>
>? ? ? ? ?If you need help troubleshooting the supply I would be happy to assist.
>
>? ? ? ? ?Peter
>
>>? ? ? ? ?On Apr 8, 2024, at 7:33?PM, Michael Yellin <michaelhq54@...> wrote:
>>
>>? ? ? ? ??
>>? ? ? ? ?Peter,
>>
>>? ? ? ? ?This idea "You could wire an incandescent bulb in place of the fuse
>>? ? ? ? ?so you don't keep blowing them.? Find a wattage that will allow the
>>? ? ? ? ?supply to boot, but then light
>>? ? ? ? ?up when the short occurs" is very interesting. How can I choose the
>>? ? ? ? ?appropriate wattage of light?
>>
>>? ? ? ? ?Thanks,
>>? ? ? ? ?Michael
>>
>>? ? ? ? ?On Sat, Apr 6, 2024 at 7:05?PM Peter Gottlieb <hpnpilot@...> wrote:
>>
>>? ? ? ? ? ? ?Could be a lot of things.? The manual is available on the web.?
>>? ? ? ? ? ? ?At quick glance
>>? ? ? ? ? ? ?it seems when the supply is "on" before being enabled, the main
>>? ? ? ? ? ? ?transformer and
>>? ? ? ? ? ? ?rectifiers are live.? You can verify by measuring at the main
>>? ? ? ? ? ? ?electrolytics.
>>
>>? ? ? ? ? ? ?My guess is something is wrong with the pass elements and the
>>? ? ? ? ? ? ?supply crowbars
>>? ? ? ? ? ? ?but doesn't limit current and the fuse takes over.? You may be
>>? ? ? ? ? ? ?able to max out
>>? ? ? ? ? ? ?the crowbar OVP limit and not blow the fuse but that won't solve
>>? ? ? ? ? ? ?the problem.
>>
>>? ? ? ? ? ? ?You could wire an incandescent bulb in place of the fuse so you
>>? ? ? ? ? ? ?don't keep
>>? ? ? ? ? ? ?blowing them.? Find a wattage that will allow the supply to boot,
>>? ? ? ? ? ? ?but then light
>>? ? ? ? ? ? ?up when the short occurs.
>>
>>? ? ? ? ? ? ?Peter
>>
>>
>>
>>? ? ? ? ? ? ?On 4/6/2024 9:48 PM, Harvey White wrote:
>>? ? ? ? ? ? ?> if the fuse blows when activated, then something downstream of
>>? ? ? ? ? ? ?the fuse, (once
>>? ? ? ? ? ? ?> activated) is likely a short.? Assuming that the high amperage
>>? ? ? ? ? ? ?fuse blows
>>? ? ? ? ? ? ?> roughly as fast as the low amperage fuse (don't try to measure
>>? ? ? ? ? ? ?it......) then
>>? ? ? ? ? ? ?> you're likely looking at a dead short downstream of the fuse.
>>? ? ? ? ? ? ?>
>>? ? ? ? ? ? ?> Harvey
>>? ? ? ? ? ? ?>
>>? ? ? ? ? ? ?> On 4/6/2024 7:18 PM, Michael Yellin wrote:
>>? ? ? ? ? ? ?>> Mates,
>>? ? ? ? ? ? ?>>
>>? ? ? ? ? ? ?>> Recently acquired an HP 6643A.? When the unit is plugged in
>>? ? ? ? ? ? ?and turned on, it
>>? ? ? ? ? ? ?>> boots, and seems fine.? However, as soon as the unit is
>>? ? ? ? ? ? ?"activated" to
>>? ? ? ? ? ? ?>> generate voltage and amperage, the glass fuse blows.? I don't
>>? ? ? ? ? ? ?have an endless
>>? ? ? ? ? ? ?>> supply of fuses, but I have tried some very low and very high
>>? ? ? ? ? ? ?voltage and
>>? ? ? ? ? ? ?>> amperage settings, but that made no difference (I didn't think
>>? ? ? ? ? ? ?it would, but
>>? ? ? ? ? ? ?>> well, it made me feel better to try) Opened her up, looked
>>? ? ? ? ? ? ?around, and
>>? ? ? ? ? ? ?>> everything appears fine, no burnt parts, no bulging caps, no
>>? ? ? ? ? ? ?melted wires,
>>? ? ? ? ? ? ?>> and nothing obviously shorted. Anyone have any ideas what
>>? ? ? ? ? ? ?could be wrong, or
>>? ? ? ? ? ? ?>> can send me down a path to try and resurrect the thing.
>>? ? ? ? ? ? ?>>
>>? ? ? ? ? ? ?>> TIA
>>? ? ? ? ? ? ?>> Michael
>>? ? ? ? ? ? ?>>
>>? ? ? ? ? ? ?>
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