Hi Gary, I don't have anything to measure the actual load on the FT-920, unfortunately no dummy load available either. Bought the radio used and without a power chord. I ordered a Yaesu power chord thru MFJ and it came with two inline fuses one on the positive side one on the negative side, both rated at 20A and look good. Question If I might ask still is MFJ-4225MV@25A ..... too under powered or acceptable barely but could be better. Thank you for your input I appreciate it!
73 Gayle Dotts KF5LVZ On Sat, Apr 8, 2017 at 2:29 PM, Gary Sitton via BVARC <[email protected]> wrote: > Gayle: > > Measure the actual under load (100 W. CW) voltage > at the back of the FT-920. Faulty inline fuse holders > or connectors, and wiring losses can cost you 1/2 v. or > more. You need a full 13.5 to 13.8 VDC at the back. > Since power to a R Ohm load is V*V/R, a relative power > line voltage drop will result in ~twice a relative power > loss for a fixed R. > > 73s, > Gary Sitton, K5AMH > [email protected] > > On 4/8/2017 14:17, Gayle Dotts via BVARC wrote: > > Got a question on power supply for my Yaesu FT-920. > > The FT-920 manual says: 13.5V DC….Rx(w/signal) @2.5A, Tx (100W) > @22.0A. My current power supply is a MFJ-4225MV 25A switching power. Is > this MFJ will power the Yaesu but I don’t really see the 100W on output Tx, > although the amp meter on the MFJ shows 6-12A while transmitting running > low to high on the RF PWR knob on the FT-920. Do I need to increase the > power supply?? Please advise. > > > Thanl you, > > Gayle Dotts > > KF5LVZ > > > _______________________________________________ > BVARC mailing > [email protected]http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Message delivered to [email protected] > > > > > _______________________________________________ > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Message delivered to [email protected] > >
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