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Tuesday, May 14, 2013

1KW 70cm LDMOS Amplifier

June 06,2013: PA Done! 
Tested power-handling @ 1,1Kw CW for 5mn with no prob. 

Parts used:
Kit W6PQL 1 Kilowatt 70cm amplifier
Dual directional coupler IPP, Innovative Power Products
70cm Low Pass filter: insertion loss: 0,15dB
PA controller W6PQL
High Current FT switch W6PQL
Coaxial relays NARDA and Dow-key
Fans ebmpapst 4114H - 2x285 m3/h and 2x90 m3/h on TX mode and 2x100, 2x 40 in RX mode.
Connectors: Anderson powerpoles, XLR, RCA, N, SMA.
Old reconditioned dial meter and shielded.
And small parts (Addison/Active Montreal, eBay)






Fuse holder Protection on Anderson Powerpoles

May 14,2013: On the bench... 1KW 70cm LDMOS Amplifier with parts of Jim,W6PQL.
 Two Freescale MRFE6VP5600H. (Updated on time...)