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Hi to all on the list.
I am sure the topics has been covered in previous threads but I could =
not find an answer on the archives.
What I would like to know is what steps should be performed when =
bringing an older amp back to service.
The reason I ask is that I am about to get a second hand Yaesu FL-2100z. =
The unit is 18 years old with original tubes (I believe they are 572 - =
haven't seen the unit yet). The gent has owned it since knew, and it has =
never been used over 200W output as he only has a 200W tuner. It was =
mainly so he could use it for AMTOR and let the exciter idle for his =
200W output. It was last used 2 or so months ago to see if it still =
worked. Very low hours overall (guess-timation of less than 100)
My questions are:
Should I heat up the tubes up for a longer period (not the getter =
theory again)?
Do you run the amp at increasing power levels, what time periods =
(i.e.. 50W for 5 mins, then increase to 100W etc etc)?
My worry is the HV caps for a vintage machine, should they be =
swapped out, or wait until they die (but that will usually kill =
something else too)?
Any other things to consider?
As I said this will have been dealt with before, but for use "young =
pups" humour me.
I will be looking for to some comments from Rich and Tom
Cheers to all
Noel VK4KNW
PS> The FL-2100z is "rated" at 1500W pep INPUT for SSB what is a rule of =
thumb for output (I mean real out the coax output), also for 1000W CW =
INPUT what does that translate into. I know it is a legacy of the days =
when we had INPUT power limits (I have had my call for 18 years now)
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<DIV><FONT face=3DArial size=3D2>Hi to all on the list.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I am sure the topics has been covered =
in previous=20
threads but I could not find an answer on the archives.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>What I would like to know is what steps =
should be=20
performed when bringing an older amp back to service.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>The reason I ask is that I am about to =
get a second=20
hand Yaesu FL-2100z. The unit is 18 years old with original tubes (I =
believe=20
they are 572 - haven't seen the unit yet). The gent has owned it since =
knew, and=20
it has never been used over 200W output as he only has a 200W tuner. It =
was=20
mainly so he could use it for AMTOR and let the exciter idle for his =
200W=20
output. It was last used 2 or so months ago to see if it still worked. =
Very low=20
hours overall (guess-timation of less than 100)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>My questions are:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> Should I heat up the =
tubes up=20
for a longer period (not the getter theory again)?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> Do you run the amp =
at increasing=20
power levels, what time periods (i.e.. 50W for 5 mins, then increase to =
100W etc=20
etc)?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> My worry is the HV =
caps for a=20
vintage machine, should they be swapped out, or wait until they die (but =
that=20
will usually kill something else too)?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> Any other things to=20
consider?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>As I said this will have been dealt =
with before,=20
but for use "young pups" humour me.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I will be looking for to some comments =
from Rich=20
and Tom</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Cheers to all</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Noel VK4KNW</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>PS> The FL-2100z is "rated" at 1500W =
pep INPUT=20
for SSB what is a rule of thumb for output (I mean real out the coax =
output),=20
also for 1000W CW INPUT what does that translate into. I know it is a =
legacy of=20
the days when we had INPUT power limits (I have had my call for 18 years =
now)</FONT></DIV></BODY></HTML>
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