Can my 24V->12V transformer handle a 65W 2m rig?

[codgerdave]

My 24V JDM BJ73 came with a 24V->12V transformer. I'd like to purchase a 2m Yaesu ham rig, but am unsure if the transformer can handle the load.

The writing on the transformer is all in Japanese so I had my brother (who speaks the language) decipher it for me and the salient bit says:

Fixed status (?) input/output:
DC14V continuous average current 2.24A, instantaneous/momentary current 10A

The Yaesu will draw 10A at full transmit (65W output). What I want to know is how "instantaneous/momentary" a typical transmission (e.g. 10-20s) is considered to be. The current draw from the rig when in squelched receive is far less, obviously (<0.3A). Can this transformer handle it?

Cheers
Dave
VE2NET

 

[Capt. Jim]

No. The momentary rating is for the initial surge when you first start something, like a DC motor.

The 2.24 amp rating will not met the needs of your 10 amp draw at key-up.

 

[FJ40_owner]

Not even close. You need at least 10 amps to transmit at high power. I suspect it is even more. Even at low power you would need more than 2 amps.

You could purchase another converter, (Dah?)

Or use a 12 volt Gel cell rated for say 50 amps and rig up a charge controller. Rub Goldberg but I do some of my best work that way.

 

[codgerdave]

Cheers.... As I thought. Wanted to double check.

 

[Capt. Jim]

If you are using two 12 volt batteries in series to get your 24 volts, you can tap into the middle (the wire between the two batteries) and get 12 volts with no transformer needed.

 

[george_tlc]

If you are using two 12 volt batteries in series to get your 24 volts, you can tap into the middle (the wire between the two batteries) and get 12 volts with no transformer needed.

Yeah - BUT that feeds the whole inbalance situation that is the archilles heel of the 24V system.

You are better off getting a high capacity 24-12V converter versus dealing with unbalanced charging of the two 12V batteries.

Been there and done that and got fed up with all the negatives of a 24V system AND finally converted my 24V Nissan to 12V. Had to give up the one plus of a 24V winch - but well worth it not having to deal with the stupid 24V issues and hassle of not having a true dual battery system.

cheers,
george.