Now that you've fixed it, I think it best that you post it to the left
coast downunder for further testing.
73, Alek, VK6APK
On 16/07/2020 5:07 pm, Martin Sole wrote:
Well definitely a case of RTFM it seems. The 34.9 volts is pretty much to
spec for this amplifier, when it's in the MID position! Changes to about
30v in the LOW position and 48v only in the HIGH position. Switching modes
and measuring at the terminals as well as the built in display confirms
this which would seem to indicate all is well with the supply.
Amp now does an easy 2kw out with about 35 watts drive. It must just have
been the dead geckos and associated gunk that prevented the supply from
starting I guess.
Martin, HS0ZED
On Wed, 15 Jul 2020 at 20:10, Martin Sole <hs0zed@gmail.com> wrote:
Hi,
I am looking at an SPE-2K for a friend. When checked last week the amp
appeared to function mostly okay but would not amplify. Metering indication
was no high voltage supply. Having bought the amp to my QTH I have examined
it in more detail. On opening the high voltage supply, a MeanWell RSP
3000-48, 48 volt 62.5 amp, I found 3 dead and decaying geckos, native to
these parts and quite prolific.Having removed them and any remaining
detritus I switched on the amplifier and find the supply gives the green OK
when the amp is selected however the supply voltage measures 34.9 volts
instead of 48, confirmed with front panel and fluke across the terminals. A
small heat-sink in the power supply that has four FET's and one TO200 diode
mounted on it is rapidly heating.
Any thoughts on a possible cause?
I have not been successful in sourcing much information on this supply
other than a general data-sheet, certainly no schematics, though its a
switch mode power supply so...
Any more info out there?
Martin, HS0ZED
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