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#bitx40help Probably need new Raduino #bitx40help

 

Yep I think I did it.? I applied reverse polarity to my BITX40 from HFSignals.? The power to the board was connected but no power to the PA.? (The connector I used had the positive connected to the outside and the negative to the central - was for an odd piece of test gear I used years ago).? Anyway, correcting the connector results in no sign of life on the display.? Reading through the posts, it would appear that I may well have bricked the raduino.? Hence I would like to contact Mike Hagen to enquired about his improved raduino.? So could Mike please contact me off list so we can discuss features, costs etc.? And the irony is that components toprotect against reverse polarity are on order but have not yet arrived. vivimus atque discimus.
 

Amici curiae will tell you that probably nothing happened.

You would have had a smoking gun: D7 - in B40 that part dies first, so please check if it has fried and then the rest..

What was the power supply?

Raj

At 12-02-2018, you wrote:
Yep I think I did it. I applied reverse polarity to my BITX40 from HFSignals. The power to the board was connected but no power to the PA. (The connector I used had the positive connected to the outside and the negative to the central - was for an odd piece of test gear I used years ago). Anyway, correcting the connector results in no sign of life on the display. Reading through the posts, it would appear that I may well have bricked the raduino. Hence I would like to contact Mike Hagen to enquired about his improved raduino. So could Mike please contact me off list so we can discuss features, costs etc. And the irony is that components toprotect against reverse polarity are on order but have not yet arrived. vivimus atque discimus.
 

Thanks to Raj for his useful advice.

I have just pulled the raduino out of my BITX40 and plugged it into the USB port on my PC and voila! everything lights up the way it should so neither the raduino nor its display appear damaged from my stupidity.? So now to check D7 and maybe other components on the main board.

73 all
Kevin
VK3DAP / ZL2DAP
 

Hello Raj and all,

Thanks Raj, I did indeed find that D7 was blown.? I unsoldered it from the board and tacked a 1N4148 in its place, paying due heed to the polarity of the diode.

I had taken the raduino and its display unit out of the BITX40 and connected it to my computer USB port.? It lit up and behaved as it should.? When I put it back into the BITX40, it does not light up so I have now to track the voltage path and find where it is getting blocked.

Just another day of fun detective work in this antipodean paradise.

73
Kevin
VK3DAP / ZL2DAP
 

Hello all,

Replaced D7, then found fuse blown. Replaced fuse, applied power, and raduino display lights up.? Rotating the tune pot changes frequency.? Only problem that is evident now is an intermittent connection at the power input.? I can replace that and see where we go from there.? Again thanks to Raj.

73
Kevin
VK3DAP / ZL2DAP

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