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REPLACEMENT IRF510 ON uBITX V4

Rubens Kamimura
 

ALL

I have uBITX v4 and use it only for FT8 in 40m, but the IRF510 outputs are burned, I am changing them, how do I check if the bias and power settings are correct?
a) I check the tension in the GATE or,
b) the current in the DRAIN?
c) the output power on FT8 at 40m (7,074 MHz), adjusted on VR1?

If I choose to use two IRF520 in place of the IRF510, should I make any changes? any recommendations?
73 from py2pvb
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Rubens Kamimura
Tel. (18) 3746-8680 ramal 116
Cel. (18) 9-9819-2225 WhatsApp ou (18) 9-9819-2255 

Evan Hand
 

I use the HF Signals direction:
https://www.hfsignals.com/index.php/ubitx-tuneup/

Requires an amp meter in the power to the finals, or just look for a difference of 100 ma for each setting.

73
Evan
AC9TU

Rubens Kamimura
 

Tks
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Saudações fraternais, 73/51 PY2PVB

Rubens Kamimura
Tel. (18) 3746-8680 ramal 116
Cel. (18) 9-9819-2225 WhatsApp ou (18) 9-9819-2255 


Em ter., 7 de abr. de 2020 às 14:19, Evan Hand <elhandjr@...> escreveu:

I use the HF Signals direction:
https://www.hfsignals.com/index.php/ubitx-tuneup/

Requires an amp meter in the power to the finals, or just look for a difference of 100 ma for each setting.

73
Evan
AC9TU