Funny you say HP as I have seen some very similar looking hp units, will hang on to it till I find a few new ones
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Anybody use switching power supplies?
- Thread starter guitar_199
- Start date
Funny you say HP as I have seen some very similar looking hp units, will hang on to it till I find a few new ones
Found replacements, they are HP DPS-1200fb 1200w units 75amps each, ordered 2 and will be replacing them.
Well replacements were dropped in front of my door when I arrived home from work, so I hope to get them in on the weekend.
I have an MFJ 4125 which I have had many years.It's just used for a dual band mobile & some small accessories no heavy duty stuff.
SIX-SHOOTER
I have some DPS600PB and have seen many mods with people using potentiomters to get to 13.7V, or completely disable OVP. Can you share a link to step by step instrucitons on how to adjust OVP properly for stable use? It would be MOST appreciated!
Thanks
Frank
I have used switching power supplies for about 10 years. The earlier ones I got were noisy but didn’t realize it right away so I just used them to run other stuff. Just recently I bought 100 switching power supply so I could run everything I have on one amp and it works fantastic. If you buy them from the same manufacturer, you could piggyback them also like if you have 2 50’s and together in parallel, you can get 100 A or close to it. I have a Texas Star 500 in the house on a 50 and 35 amp, switching power supplies hooked together, by the same manufacture. It drives the amplifier very very well and nothing gets hot. It’s warm but not hot.
For the past couple of years I’ve been using a Samlex SEC-1235.
30 amps, no noise. Not adjustable, but it still produces a constant 13.85 volts just as it has since day one.
https://samlexamerica.com/products/30-amp-switching-power-supply-sec-1235/
30 amps, no noise. Not adjustable, but it still produces a constant 13.85 volts just as it has since day one.
https://samlexamerica.com/products/30-amp-switching-power-supply-sec-1235/
For the past couple of years I’ve been using a Samlex SEC-1235.
30 amps, no noise. Not adjustable, but it still produces a constant 13.85 volts just as it has since day one.
https://samlexamerica.com/products/30-amp-switching-power-supply-sec-1235/
Something I did wanna share I forgot about my last comment, try to keep the voltage around 13 or so I was running mine at like 14.5 trying to get the most out of the amplifier and all it did was fry the finals. I talk on sideband 99% of the time and it’s still fried the finals. My Radio Guy was telling me it’s cause I’m over driving them.
I use MEGA-WATT S-700-12 supplies to power my TX600 amp. Four in parallel @13.9vdc. provides 200 amps. Amplifier does 800W peak and the supply doesn't drop a tenth of a volt under load. Also use a 1 Farad capacitor as a current sink.
Absolutely no hash or other supply noise. Fans are quiet too.
- J.J.399
Absolutely no hash or other supply noise. Fans are quiet too.
- J.J.399
Greg T
WDX-945 (Jazz Singer) Upper Peninsula of Michigan
This is what I use. Megawatt 700 x 2 @14.2v for my DX-500. I use a separate one @14.5v for my Stryker 955
Greg T
WDX-945 (Jazz Singer) Upper Peninsula of Michigan
That's not true. Mobile amps are meant to run in an automotive environment. A vehicle runs between 14.4v and 15v when the battery is at full charge and the vehicle running. These voltages will not blow your finals.