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And Farnell for ?28.03

Transistor MRFE6S9060NR1 are still available through Mouser for ?29,69 and Digi-Key for ?30.54 so if you blow one up you can still get good ones.

*LDMOS transistors are expensive and can be easily blown up! * *Best practice methods to avoid costly failures. * *Most of this is learned from bitter experience of building 100’s of

*Transistors that will work with the G4BAO PCB* *Plastic transistors that will fit with no modifications;* *MRF6S9070(NR1,MR1)* *MRF5S9070(N, NR1,MR1)* *M59070N* *MRF9045(NR1,MR1,LR1)* *CERAMIC

The PCB manufacturer is saying dispatch by end of next week - 17th July It's getting closer!

I found this Polish site on Ebay https://www.ebay.co.uk/itm/23cm-1296MHz-Power-Amplifier-Transistor-60Watts-M9060M-MRF6S9060NR1-used-test-OK/283003101490?hash=item41e44ca132:g:TKQAAOSwRgJXh~JF this

*Try not to blow the device as I only managed to buy enough transistors for the kits* *. I will not be carrying any spares. They are available but good ones can be expensive and some of the Chinese

Bias current for this transistor is 600mA

Note that the PTT voltage can be in the range 8 - 28 volts and can be tied to the main supply for DATV

The power transistor os an LDMOS so the gate is static sensitive so use proper handling precautions when handling it. Once it is fitted to the populated PCB it is pretty safe - that is why I prefer to

I have just come across a case where PA's were being blown when driven by a Lime Mini on a Portsdown transmitter at 23 cms This one was the latest software and gave out a spike of signal a few MHz

I prefer to use a 10k? 10 turn pot for this and a suitable type is Bourns 3224x sold by RS components as 743-2306 for values of the preset lower than 10k then R4 should be reduced in value or even

This project would not be possible in its present form if it were not for all the hard work of designing the matching that was done by John Worsnop G4BAO. He mentions this in a few modest words in his

*I am afraid the first batch of PCB/transistor/ATC partial kits is now sold out for the 70 watt version.* *There may be one or two people drop out of the pre orders – if so the next on the new list