[Boatanchors] Johnson Ranger

[Richard Knoppow]

    Is the transmitter working? If not what is not working? If there was 
an arc over it may have left a mark, look very carefully and have 
someone else also look since its easy to miss the same thing many times.
    Usually this kind of thing is due to either an arc-over or an 
exploded resistor, sometimes an electrolytic capacitor blows up. That 
should be easy to spot, it will have blown goo all over.
    Use a strong lamp and inspect very carefully. Power off and 
disconnected of course.

On 5/17/2024 12:52 PM, Lawrence Godek wrote:
> I was going to get on the air this morning with the locals on 40M AM, 
> 7160.  When i turned the switch on the ranger from off to tune, 1st 
> step, thee was a flash and loud bang.  From there after the filaments 
> were lit, when you went into Phone or CW position the red transmit light 
> on the front panel came on but there are no meter reading at all.  no 
> voltages, nothing except the filaments are lit.
> 
> that indicates the fuses are good.  I see no burn marks anywhere.  The 
> flash was on top of the chassis in mid air so where it originated i have 
> no idea.  The secondary of the transformer is permanently grounded.  I 
> just don't see on the schematic what could have happened.  Sure hope it 
> didn't do something to the power tran. as that would be disaster.  The 
> transmitter looks brand new underneath.  I replace the filter cap for 
> the HV with a 1 Kv type so that shouldn't have anything to do with it.
> 
> Any thoughts or experiences similar with your ranger.  This is one sweet 
> clean unit.  I have been using it prior to this date and there were no 
> indications of any kind, it just went along and talked running about 50W 
> out.  Everyone said it sounded super good and to not change anything. 
> Just out of the air this happened.
> 
> Larry W0OGH

-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998