FT-101B "Kap Pack"

[N8ETQ]

FT-101B "Kap Pack"


    I have a FT101 on the bench now with a cust supplied  "bag o parts"
to install. Does anybody Know off hand if I change the cap C-125 from 100pf
to 10 pf "To allow for nuetrilization of American Brand 6JS6's" if I would
still be able to nuetralize the NEC 6JS6's that are in it now?  It seems fine
and makes plenty of power, My old Hickock 532 has no socket for 12 pin tubes
so I cant test them but resting current is OK. The 12BY7 tests as new.

Thanks

/Dan

[ke7trp]

No. Do not install the cap for the american tubes if the radio has the correct japanese tubes in it.  I do suggest you replace the cap though. All of them are likely bad those old micas have a tendency to Drift during temp changes of idle to AM key down.  To avoid and issues of tuning change, just fork lift them all out. 

Good luck with it!


C

[N8ETQ]

Thank You,
 

 I didnt do it, it seemed to me that the total Cn would have been
to small.  I did change the other 2 caps, one was an 82pf
from the 12by7 to the 6JS6 grids, I didnt notice any diff. in
idle current on the PA, and the other one was 1000pf for 160
m.   The cust also had a 3n201 that was to replace the 3SK40
RF amp but that didn't seem to work correctly either. I measured
the amount of signal to hit S9 from 20M and up with the orig.
zitter then rechecked it with the 3N201 and it was a few db
worse, Also tried "Kickin' the other end of the dog" with the
MDS thing and it was still worse! The RX was nice and quite
though!

    I did add a FT 6kc AM filter to it and that works nice. It now
has 3 filters SSB,CW and AM.  I had forgotten how nice those rigs
were. 

Thanks again

73

/Dan

No. Do not install the cap for the american tubes if the radio has the correct japanese tubes in it.  I do suggest you replace the cap though. All of them are likely bad those old micas have a tendency to Drift during temp changes of idle to AM key down.  To avoid and issues of tuning change, just fork lift them all out. 

Good luck with it!


C

[ke7trp]

Dan, Something went wrong with the 201. Those normaly make a big difference in the RXer. I have installed them many times and always had a real nice jump in performance. The last one I did made a solid 10DB increase.  What band did you test it on?    Did you align the rig?

You an also use the NTE222 by the way.


The 160 cap shorts out.  When you select 160, the rig will blow the fuse.  So its good to get that changed. The Driver cap will change value with temp.  So in an AM QSO, Power goes lower and lower and lower and the IC goes higher and higher as time goes on. That is the main reason to change it.  Also change the Electroylitic on the bottom of the radio. Its easy to get to.  The others on the PS card will be bulged if bad. If not buldged, You can leave em, they will be good.  I have never had the big filters go.  Some change them.

This is a real fast way to set the RX/TX and the Clarifier.

http://w3jxq.snycomp.com/ft101/clarifier.html

I have mine setup on 10 meter AM and 2 meter AM with the FTV250 transverter right now.  Lots of fun.  Sound great on AM.

C

[N8ETQ]

Thanks Clark,

   Yeah, I don't get it. I recall doing it back in the 90's
on a bunch of 101's and they never needed anything more
than a touchup on on the alignment but the improvement
was immediatly noticable. I checked it at 14.2, 21.2 and
28.2 with results the same across the board. I just repeated
the test and did touch up the alignment on 28.2 still
no joy. I can't believe I don't have a replacement here
but have been GaaSFETs here for so long now I guess I'm out.
I just replaced the PA tube in my HP608D too!  Those other
2 caps went in without issue. I 'll just send the cust an
e-mail maybe he plans to slide in some new jugs.

   Anyway thanks again. C ya

/Dan

Dan, Something went wrong with the 201. Those normaly make a big difference in the RXer. I have installed them many times and always had a real nice jump in performance. The last one I did made a solid 10DB increase.  What band did you test it on?    Did you align the rig?

You an also use the NTE222 by the way.
<SNIP>
C

[ke7trp]

I am thinking this might be because its an old "B" model.  I have to think about that for a bit.

C