[Kenwood] ts 520

[G. Doughty]

Hello to all,

 

Well, here I am again with a great old kenwood rig (which by the way I
have wanted for a long time.)   This is, however, not my first.  The
first was an 820 that was DOA.  Inspected by Kenwood East (two blocks
from QTH) and they said it hasn't worked in awhile.  Sent it back to
owner.  Now I have a 520 ( I am a sucker for tubes and knobs HI HI!!)
and it appears to have some problems.  No real output is the first
problem.  What I mean by real is that there is some after tuning plate
and drive but only when I key down the mic in cw mode.  Then SWR is off
the charts.  I have a couple of questions regarding theory of operation
for this rig and then I will post a question I proposed to the
boatanchor newsgroup.

 

When tuning plate and Drive, or is it load, baby is sleeping in radio
room so I can't check right now.  Anyways, does the knob need to be
close to the band I am using?  i. e. 7,14, 28 etc.  
 

Does the receiver always need to be tuned? And why? 
 

I have done all the normal things, checked screen plate switch in the
back, standby switch, CAR knob, mic gain, etc.  I also have an issue
with antenna tuning:

 

I notice that when I tune the rig, if I key down my mic when in cw mode,
I get some output (neglegible, but pwr nonetheless) but my swr is off
the scale.  I have a loaded alpha-delta 40m dipole in the attic fed with
coax as well as a standard 20m dipole in the attic.  How do I tune the
rig then tune the antenna?  I do not have a dummy load yet but with my
last rig, tuning output was but 3 watts. (A very low power lid I guess,
sorry)  Now that I have 100 watts, I may need to purchase a roller
inductance tuner i.e. mfj-969.  Any suggestions welcome.

 

Thanks

 

G. Doughty

Ki4bbl
G. Doughty