[Amps] SPE-2K power supply issue
hs0zed at gmail.com
Thu Jul 16 09:48:36 EDT 2020
I need to do some tropicalisation. Unfortunately the EU sized vent holes
make no allowance for the general level of critters, bugs, geckos and
other assorted wildlife perfectly able to crawl inside a nice warm
amplifier. Some judiciously cut and applied pieces of mosquito screening
should do the job. Once that's done some suitable amount of testing will
be required before I must rather sadly return it to its proper owner.
I will say I'm impressed, purely on the construction alone it is truly
beautiful and the standard is far more professional than the average bit
of ham kit. It clearly has just about all the options you could want and
does seem almost overbuilt. It's no cheapy for sure but I would say I
think it represents good value in its class.
On 16/7/63 16:37, Alek Petkovic wrote:
> 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
>> 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
>> 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 at gmail.com> wrote:
>>> 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
>>> was no high voltage supply. Having bought the amp to my QTH I have
>>> 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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