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
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