[Elecraft] NB option

Thu Jun 5 11:01:02 2003

I would use an ohm meter and check all of your connections first, then
check out your Noise blanker and make sure your transformers are wired
correctly (and that they have the proper amount of turns, etc).

I just built the noise blanker and installed it last weekend and mine
works fine.

Good Luck

--- pfb <[email protected]> wrote:
> Help,
> 
> Installed the noise blanker and the radio went deaf.  I have
> completed it
> according to specs and now to hear the noise floor I have to max out
> the AF
> gain and the signals are just barely audible - I have to put my ear
> near the
> speaker to even make out the conversations.  Yet yesterday before I
> assembled and removed anything this rig was hot and the AF gain was
> always
> set at 2-3-4 level and played nice clear and loud.  Not now!!!!
> 
> So I removed the board and it is still muffled.  Muffled - that seems
> to be
> best way to descibe the signal now.
> 
> I have removed the jumper at W5.  I have removed R88, 89, 90 and I
> have
> installed a jumper between R89 and and a 2.7 k resistor is at R88.
> 
> Any Ideas on what I did wrong?  This thing went from being the
> hottest
> little reciever for 3 days to a deaf mule simply by installing the
> Noise
> Blanker???!!!  Did I maybe damage a pad or trace in removing
> R88,89,90?  I
> do not know what to look for now.
> 
> Any suggestions or help is appreciated.!
> 
> Paul
> K8QT
> 
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=====
--

Harry - AB2PN

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