Thanks will do. On Sat, Apr 8, 2017 at 7:27 PM, Gary Sitton via BVARC <[email protected]> wrote:
> You need to measure the voltage as I indicated with the rig in CW mode > into an antenna or whatever you used before when you measured the power > output. Now a cheap but accurate digital volt-ohm meter will cost as > little as $10. A small investment in your hobby I think. > > Gary, K5AMH > > Sent with AquaMail for Android > http://www.aqua-mail.com > > On April 8, 2017 5:27:52 PM Gayle Dotts via BVARC <[email protected]> wrote: > >> 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] >>> >>> >> _______________________________________________ >> BVARC mailing list >> [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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