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Re: construction


 

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Hi Evan

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Thanks for your reply.? I have checked the voltage form the power supply and it is 12.3 v.? I bypassed the diode in case there was a problem there but still came up with the same result of 3.5ma rather than the 90ma.

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73

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Ray

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From: [email protected] <[email protected]> On Behalf Of Evan Hand
Sent: Thursday, 9 July 2020 4:01 PM
To: [email protected]
Subject: Re: [BITX20] construction

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Ray,

There are 7 2n3904 transistors that should be on in a linear bias plus the LM386 audio amp when in receive.? If you have wired the power correctly (the RED wire is the +12volts to everything EXCEPT the PA)? it should read 90+ma.? I would check your power wiring as a start.? I would also check the power supply to verify that it is providing 12volts.

The readings are without the Raduino connected, per the original wireup instructions.? The PA bias adjustments come later and will add another 200ma + the Raduino current requirements?to the readings.?

My v5 is buried in a case with a 3.5" Nextion screen, AGC, and an outboard audio amp, so it is not easy for me to get to the readings from that board for comparison. As stated in the first paragraph above, you most likely have a power supply/wiring issue.

73
Evan
AC9TU

73
Evan
AC9TU

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