[Amps] SPE-2K power supply issue

[Adrian]

I have a 1.5K-FA SPE here. Great amp, however getting any tech info out 
of SPE is like getting blood out of a stone.

There is a tech doc for the 1KFA which seems the only tech info ever 
released from SPE ;

http://vk4tux.duckdns.org/15KFA/Expert_Schematic_diagramsII.pdf

That may be useful as they are all very similar in design.


On 15/7/20 11:10 pm, Martin Sole 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
>
>