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Reviews Categories | Power Supplies | Yaesu FP-757HD (Heathkit SBA-1400-4) Help


Reviews Summary for Yaesu FP-757HD (Heathkit SBA-1400-4)
Reviews: 2 Average rating: 5.0/5 MSRP: $(missing—add MSRP)
Description: Heavy Duty Design
Product is not in production.
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You can write your own review of the Yaesu FP-757HD (Heathkit SBA-1400-4).

N5XJT Rating: 5/5 Mar 6, 2016 14:43 Send this review to a friend
Excellent Power Supply  Time owned: more than 12 months
Bought mine used about 3 years ago, the unit is at least 15-17 years old. It never overloads, no hash or noise of any type, I have drawn in excess of the 20 amp rating a number of times with no loss of regulation or issues. Speaker is front facing and provides good audio. Rear terminals provide 8 amps and are very useful for smaller DC powered items or a UHF/VHF rig. Cannot think of any negatives. It's a great unit, highly recommend it.
 
N8FVJ Rating: 5/5 Jun 9, 2015 09:28 Send this review to a friend
Heavy Duty  Time owned: 0 to 3 months
Used Astron was the standard when shopping for the best prices. Now-a-days vintage ICOM, Kenwood & Yaesu power supplies can be found in the same price range.

Enter the compact linear type Yaesu FP-757HD. The Heathkit SBA-1400-4 is the same power supply.

The FP-757HD is a fairly compact 13.8 volt @ 20 amp power supply measuring 9.5" wide x 10.75" deep x 4" high (including the feet). An oval internal speaker is included. The speaker has a good response for communications and provides hours of non-fatiguing use.

Being so compact at 4" high I was curious of the power transformer. The Astron RS-20 power transformer is 4.5" high. Yaesu used a Hypersil design. Older hams know of the compact, yet very powerful Peter Dahl Hypersil transformers.

The main power supply filter uses three 33.000uF @ 25 volt capacitors. The capacitors ripple current is approximately 20 amps continuous or more healthy vs the Astron RS-20. Yaesu uses four pass transistors vs two pass transistors on the Astron RS-20.

The FP-757HD conservative design is more like an Astron RS-35A and boosts a 30 minute full load rating. Likely the HD after the model number stands for heavy duty. A cooling fan will cycle on after a period of time then cycle off. The fan is reasonable noise wise. I have drawn above 20 amps from the P-757HD without any loss of regulation.

The power supply includes a cord & cinch type connector for direct connection to Yaesu transceivers of the period plus has two way DC binding posts on the rear panel. A front panel power switch (unlike ICOM power supplies) is included. The power supply has a 120 volt AC fuse on the rear panel and an internal fuse on the DC side to protect external equipment.

I recommend this quality power supply.
 


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