According to the Tune-up instructions, the uB idles in SSB at 700ma. The B40 drew an amp in SSB with a loud HALLOW. It's not inconceivable that the uB would draw 2A or maybe more in CW.
Vince.
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On 12/28/2017 11:05 AM, N6QWHAM@... wrote:
Hi Arvo,
Actually I hate to post to these reflectors as you will get a variety of
responses that say well that never happened to me!
I can only share that the fuse went up in smoke and that my assessment
was high current draw. So a fuse and fuse holder despite what the radio
illuminati will tell you is cheap insurance when ¡°bullet proof¡± is not
good enough. But it was something that I used accidently and the
current draw did exceed 2 amps and my conclusion was high SWR. I am
keeping that power cord and fuse in my installation.
So you decide.
Pete N6QW
*From:* Arvo KD9HLC via Groups.Io <mailto:arvopl@...>
*Sent:* Thursday, December 28, 2017 7:52 AM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [BITX20] uBITX - Sensible mods #ubitx
Holy smokes!
I'm a bit too new at this to "know that sinking feeling of just having
smoked the rig."
Also, there was a thread about the BITX40 that suggested it was pretty
much bulletproof to high SWRs.
/g/BITX20/topic/6065942
So I was not thinking about excessive SWR potential for damaging the ?BITX.
I am now.
Thanks for the explanation!
--
Michigan VHF Corp.
