[3830] CWopsT OH3BCX(OH1ZAA) Single Op HP

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                    CWops Test (CWT) - 0700Z Nov 24

Call: OH3BCX
Operator(s): OH1ZAA
Station: OH3BCX

Class: Single Op HP
QTH: KP20XW
Operating Time (hrs): 0.3

Summary:
 Band  QSOs
------------
  160:    
   80:    
   40:  15
   20:   5
   15:    
   10:    
------------
Total:  20  Mults = 19  Total Score = 380

Club: Contest Club Finland

Comments:

While there was nothing to repair on the LK-550Z, 
I started to work on the SB-230 used at OH5ZA and 
exhibiting some flash-overs lately. The old 8873 
is still going strong (it was a bit low on 5.6 V
filament voltage, now upped to 6.0 V, spec: 6.3).
Also a series resistor put in the plate DC-line, 
more for the looks than for the actual function. 
These are pretty rugged tubes (650 watts out at 
50 years of age @ 1.8 kV keydown). This should 
easily go for 1 kW out ICAS at 2.2 kV when the 
DC-ripple is smoothed away from the plate line.  
A mighty blower on the back-plate is mandatory. 

Repairs took until 3:30 AM, so I did not set any 
alarms, and started very late on 7 MHz: K3MM 
N3JT NA8V and some Europe. Last few minutes 
on 14 MHz with my own short pile-up till the  
finishing bell. Solar flux is a pretty poor B4. 

Cheers/73, Zaba OH1ZAA #1856 CWops


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