hf tx tube stage outputs

22oct15

Intro
Setup
Comparing the tube stage outputs.



Intro

    Each transmitter has output ports where you can monitor the output of the various tubes:

    We've recorded the output of these jacks as a  future reference

Setup


plots/images:


tx
date
save
file
scrn
Image

power
settings




KW
rfCplr
dbm
Bias voltages
PA cathode
 I (amps)
rfDrv
dbf
dmy
Ld

notes
ipa
driver
PA
5
151021
.ps
.pdf
tx5.png
90
16.8


-300
18.4
-3.6
yes
  • ipa,drv bias were within spec
  • hf/tubestages/tx5_151021
5
151029
.ps
.pdf
tx5.png
71
16.0
-280
-280
-305
14.5
-2
no
  • all 6 tx on ant.
  • scope bb had 1Mohm term.
  • compared to 151021:
    • ipa 8db more output
    • drv 1db less output.
  • so drive has 9db less gain.
  • used  1e6 length scope buffer













1
151102
. ps
.pdf
tx1.png 79
16.26
-255
-250
-300 12
-6.5
sky
after adjusting phase for
lcp




2
. ps
.pdf
tx2.png 86
16.64
-260
-280
-320
13
-6.5
sky
3
ps
.pdf
tx3.png 81
16.37
-260
-250
-320
11
-3.7
sky
4
ps
.pdf
missed
71
15.81
-290
-270
-360
13.5
-5.5
sky
5
ps
.pdf
tx5.png 75
16.07
-280
-270
-320
12.8
-2.3
sky
6
ps
.pdf
tx6.png 83
16.51
-270
-280
-340
12
-5
sky
















processing: x101/hf/tubestages/doit.pro


Comparing the  tube stage monitor ports.

    The table below shows the tube stage monitor ports taken at different epochs. The data includes:

Date
Freq
pol
plot tx separate: voltage, spc
overplot tx
relative gain
Notes
tx1
tx2
tx3
tx4
tx5
tx6
02nov15
5.125
lcp
.ps .pdf
.ps .pdf
.ps .pdf .ps .pdf
.ps .pdf
.ps .pdf
.ps  .pdf
150211
07feb17
5.125
rcp
.ps .pdf
.ps .pdf

.ps .pdf
.ps .pdf
.ps .pdf
.ps  .pdf
170207
23feb17
8.175
rcp
.ps .pdf
.ps .pdf
.ps .pdf
.ps .pdf
.ps .pdf
.ps .pdf
.ps  .pdf
170223

Summary


Notes:




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