[Kenwood] TS-520SE receiver brain teaser

[Garey Barrell]

Tim -

I don't have a schematic for the TS-520SE, but many 
transmitters  _DO_  show a DC short across the antenna 
connector.    For quite some time, an RF choke has been 
connected from the antenna output lead to ground.  It can 
serve several purposes, one is to bleed off static charged 
accumulated on ungrounded antennas.  Another is to short the 
power supply, (or at least send up a smoke signal,) if the 
plate blocking capacitor should short.

So before you turn yourself inside out getting in there, you 
might want to look at a schematic to see if this choke is 
present.  For example, the TS-830 DOES have such a choke, 
(470 uHy) and would show only a very few ohms to ground.

73, Garey - K4OAH
Atlanta



Tim Billingsley wrote:
> Therein lies the delima ...
> Now I must acquire sufficient Light, Magnification, and intestinal 
> fortitude to attempt removing the power supply to gain access to the 
> SO-239. I already pulled the covers off last weekend in an attempt to 
> see what the problem may be ... then resorted to the schematic ... must 
> have misread it as well  .... *sigh*
> 
> Darrell Drake wrote:
> 
>> Tim...
>>    There should NOT be a dead short between the centre conductor and 
>> ground
>> of the chassis mounted SO-239, make and model of radio 
>> notwithstanding. It
>> appears that there is a short inside the radio (or a bad SO-239 jack)
>> Cheers and Good Luck...
>> Darrell,
>> VA3DG/VE3DDG
>>
>>
>> Tim wrote....
>>
>>  
>>
>>> I tested the connection on the radio and it shows for
>>> lack of a better VOM a dead short,
>>>   
>>
>>