I think same problem with RV3 if skewed then lead is cut and connection
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This would lead to sudden jump in current thus fuse blowing.
The ladies at HFSignals are twisting the RV3 to accommodate the heatsink
At 01/12/2019, you wrote:
Hi and regards from the
I have a uBitx V5 which has been working great for the last few months
and I have been loving it. I have incorporated a few mods – Allison’s
power mods, AGC & Dr Ian Lee’s firmware – latest mod was about a
Yesterday it blew the 2A fuse on transmit. I have checked everything I
can think of from the mic to the cables to the power supply, checked
earths, checked for shorts all to no avail. In the meantime, whilst
continuously testing it, I have blown a further 6 fuses. I even turned
RV1 down to practically nothing and still the problem continued. I also
replaced the FET’s just in case, but unsurprisingly, that made no
difference. It receives perfectly, but as soon as I transmit, bang goes a
I am a relative newbie – currently studying for my Full license, so, far
from experienced. My test equipment consists of a DMM.
Any help to point me in the right direction would be enormously
appreciated as frankly, I am at my wits end.