Thread: DC power supply
View Single Post
Old 01-14-2011, 08:03 PM
DaveInDenver's Avatar
DaveInDenver DaveInDenver is offline
Hard Core 4+
Join Date: Jun 2006
Location: Larimer County
Posts: 7,093

The Yaesu 1023 would be more than sufficient for a FT-2900.

Look for 13.8V nominal output and match the supply's capacity to what the radio draws maximum.

For example, for the FT-2900.

Supply Voltage: DC 13.8V 10%, Negative Ground
Current Consumption (typical):
RX: Less than 0.7A (max. audio)
Less than 0.3A (Squelched)
TX: 15A (75W) / 9A (30W) / 5A (10W) / 4A (5W)

So you need a maximum of 15A.

"The Yaesu FP-1023 power supply provides 13.8 VDC at 23 amps. Input is 120 VAC 60 Hz."

So PS capacity > radio max, you are good to go. However, while this is a nice supply, it's more than you need (and need to spend, about $175). If you don't see yourself adding a 100W HF and/or VHF rig, then you might consider something like the Astron RS-20. This is about $100 typically and a very solid supply. Does 16A sustained, 20A transient.

BTW, I don't think Radio Shack sells anything useful like this anymore. Also consider eBay or Craigslist. And old Heathkit or really any old linear power supply could be a nice option because they are so very simple that if they don't work we can rebuild or fix it.
'91 Pickup - Imelda
'08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29

"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein
Reply With Quote