On Feb 17, 2022, at 18:43, Meir Ben-Dror WF2U <[email protected]> wrote:
I have 2 PP-8474G's. One is running my GRC-19 and the other replaced the original power supply (which has a problem I haven't addressed yet) in the GRC-142 shelter, for the GRC-106.I bought 2 24-28 VDC@130 amps switching supplies - 240 vac input - on eBay some time ago ($60 each), that came out of a data center (probably for battery charging), which produce no RFI, so I use one for running the DY-17A for the ART-13, the other is a spare for now.I didn't notice that the 100 amp switcher on eBay I gave the link for, is cobbled up from 2 supplies...73, Meir WF2ULandrum, SCOn Feb 17, 2022, at 8:47 PM, J Mcvey <[email protected]> wrote:______________________________________________________________Raw SMPS are usually not suitable for radio power supplies. Espaecailly those cheap ones, which probably don't have any FCC compliance at all.
There are some decent military SMPS radio supplies out there like PP-8474G or the GEI24-RPA-T.I have both . The latter is more modern and has better regulation . I had pigtail onnectors that are supposed to power radios in a rack, but I just use the charger output.
On Thursday, February 17, 2022, 07:58:47 PM EST, Charles via ARC5 <[email protected]> wrote:
Thanks Meir, I saw that while searching... it's very obviously two 12 volt supplies wired in series without any diodes to avoid potential back-biasing during startup. Really professional job on the "24" sticker too (sarcasm).
There's a perfect transformer if I decide to go linear, and the weight doesn't matter... but they just want too much!
https://www.ebay.com/itm/165244216125
-Charles
On 2/17/22 18:54, Meir Ben-Dror WF2U wrote:
This one should do it...
73, Meir WF2U
Landrum, SC
On Feb 17, 2022, at 6:54 PM, Charles via ARC5 < [email protected]> wrote:Looking for ideas on 24-28 volt supplies that won't break the bank. Shipping on big iron is REALLY expensive these days even if a suitably sized transformer can be found... Switching supplies from China aren't too bad. Two big batteries and a smaller charger to keep them up when not operating seems to be about the best compromise. I'd like to be able to make 100 amps DC (which needs a 240 volt outlet, of course). Any thoughts? thanks -Charles WB3JOK/0 since 1976
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