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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: DK7FC, DF6NM nr Moscow |
| From: | Stefan Schäfer <[email protected]> |
| Date: | Tue, 13 Sep 2011 13:03:05 +0200 |
| In-reply-to: | <000501cc71fa$d842c940$0401a8c0@xphd97xgq27nyf> |
| References: | <[email protected]> <[email protected]> <[email protected]> <000501cc71fa$d842c940$0401a8c0@xphd97xgq27nyf> |
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Mal,I can forget about my SMPS now. Secondary rectifier diodes were shortcutted and as a result the primary switching FET got damaged. There is a shortcut to the gate now so i assume the FET driver is damaged too. To much effort now to repair that since special PFC ICs are used which are not easy available. I'll take a new one and prepare that for 13.8 V again. Apart from that i will use the acual supply now which is a SMPS too, adjustable from 0...320 VDC. Will be on air soon again.. 73, Stefan/DK7FC Am 13.09.2011 11:52, schrieb mal hamilton: Stefan I use a Linear PSU which I find convenient because on the Primary side I use a variac and I can control my voltage output from 0 to 65 Voltss I know some SMPSU'S allow voltage variations but most do not. The advantage of the smpsu is Size compared to a Linear psu. I suppose there are better ways if the mains PSU, is incorporated with the amplifier design. Portable stations many variations de g3kev ----- Original Message ----- From: "Stefan Schäfer"<[email protected]> To:<[email protected]> Sent: Monday, September 12, 2011 6:55 PM Subject: Re: LF: DK7FC, DF6NM nr Moscow Am 12.09.2011 19:42, schrieb Stefan Schäfer:PS: Will try again TXing to the far west later at 18:30 UTC.The SMPS has a fault again :-/ I am to close to the power limit and a SMPS as a load of a SMPS always keeps the supplying SMPS on its current limiting, which fails after some time... 73, Stefan |
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