I made a booboo

[MarieK]

I found an old icom vhf lying in a locker so I decided to wire it up in an old dory I have, to cut a long story short I connected positive to negative and fired her up, heard something go poof and obviously that was the end of that!

School boy error I know but what would have went in it? Any chance I can replace the component that would have blown?

 

[Firefly625]

I found an old icom vhf lying in a locker so I decided to wire it up in an old dory I have, to cut a long story short I connected positive to negative and fired her up, heard something go poof and obviously that was the end of that!

School boy error I know but what would have went in it? Any chance I can replace the component that would have blown?

yup, easy done. I had a marine battery charger that didn't like getting damp (good huh!) and it did the same "poof" noise when I plugged it in one day, opened it up and there was a master fuse wired into the circuit board. 10 minutes later with my gas soldering iron & all fixed. You may find similar inside your VHF...?

 

[MarieK]

I dont see anything that resembles a fuse, something defo fried though as I can smell it!!

 

[mlines]

Sometimes they have "sacrificial" diodes design to conduct when reverse polarity is applied and to take out the main fuse in the connecting lead (you did use a fused lead didn't you). These diodes are usually located on the circuit board just where the main power lead is soldered in.

Martin

 

[iangrant]

oops

I always check polarity it's so easy to get it wrong. if you got that demon smell then it's probably fried the power supply. as mentioned diodes etc..

A very clever electronics engineer always used to say before we fired anything up........


"Right then, turn on for maximum smoke"



Ian

 

[PaulGooch]

Email Icom with the model number and tell them you have a mate who's just reversed the polarity on his VHF.