Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: DummyLoad on May 01, 2026, 06:39:51 pm
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Nifty little DC-DC converter - 9V > 250V + 6.3V - Rated at 250V 15mA / 6.3V @ 1.5A. Works really well. Have a 12mA R load on the HT (22KΩ 6.5W R), and about 1A on the 6.3V output. Pics in link. Performs well, about 100-150mV ripple on the HT output. link to part on Amazon. Beware, that the power source (5.5mm x 2.5mm jack) the tip is (+), and not tip (-) like for pedals. May build a guitar pre with it. Use a polarity inverting cable to use pedal wall-wart.
Link to pics. (https://www.dropbox.com/scl/fo/rmzflfupnypsvlfmkf356/ANgwawUZY7OHdEIC3GTzUxg?rlkey=fi3fbxzzcrhqxjile31oqh2cl&st=o101c142&dl=0)
Link to SMPS on Amazon. (https://www.amazon.com/dp/B09ZV31X69?ref=ppx_yo2ov_dt_b_fed_asin_title)
--Pete