Search found 3 matches

by VK4DCM
Fri Jan 17, 2020 8:18 am
Forum: 144 & 432 MHz
Topic: MRF9120
Replies: 0
Views: 1275

MRF9120

Hi I got a 100w 2m amp from china this week and built it as per instructions I could set the bias OK without the FET in but now I have the FET in the bias is only 1.5 volts max and it doesen't draw any current. The dc resistance of the gate is 280 ohms and thats whey only 1.5 bias there is 470 ohm s...
by VK4DCM
Thu Jan 16, 2020 11:09 pm
Forum: Ancillary, Test Equipment, Components & Parts
Topic: Cheap eBay 2m Amps
Replies: 42
Views: 24697

Re: Cheap eBay 2m Amps

Hi I bought one of these kit of parts I call it I followed GM4JTJ s description and without that I would have sent it back well got it assembled but the DC resistance of the gate of the FET is 180 ohms so cant set the bias to anymore than 1.5 volts and it wont draw any current I think the FET is cro...
by VK4DCM
Tue Oct 22, 2019 7:23 am
Forum: 144 & 432 MHz
Topic: Mt Mobilin Beacon VK4
Replies: 3
Views: 2922

Mt Mobilin Beacon VK4

Any one heard it lately on 144.44