First question is - why are you using 4.045 MHz - that is outside the
ham band. Use 3.750 MHz instead. Similarly, 10.00 MHz should be in the
range of 10.100 to 10.150 MHz. Also 25.012 is not a good frequency
either, use 24.90 That is not likely to change your results with the
HI-Cur display, but just a comment.
Your receive current draw is about normal - no problem there.
Set CAL CUR to 3.50 amps and try again with the power set to 5 watts.
If the power goes up to a high value (much above 5 watts), there is a
problem with the power control circuits.
The lack of decent power output on 17 meters and up may be an entirely
different problem. Normally Hi-Cur combined with low power output
indicates a problem in the Low Pass Filter or T4.
Please measure the voltage at the base of Q7 and Q8 during a TUNE. It
should be 0.6 to 0.63 volts.
73,
Don W3FPR
richard gilley wrote:
I am embarrassed to say but I have a high current indication on
nearly all bands during Tx. (new build and I thought I was being so
so careful).
The Rec. draws 240 ma. at 12.4 volts. Does change slightly with
option changes.
Attempted transmitter Tune up Test Part Three page 77 has the
following results:
4.045 Mhz - Hi Cur LCD to P19
7.099 Mhz - Hi Cur LCD to P19
10.00 Mhz - Hi Cur LCD to P18
14.060 Mhz Hi Cur LCD to P16
18.090 Mhz NO Hi Cur LCD to P.3
21.054 MHZ No Hi Cur LCD to P.8
25.012 MhzNO Hi Cur LCD to P.1
Power set to 2W and 1 W with same indication.
Current limit set to 2.5A.
Voltage on C of Q8 and Q7 at 12.4 Vdc.
Res, measurements page 74 all within limits.
Changed power supply, when I noticed voltage drop and high current
reading of 5 A. No change with known good supply.
Hints requested before I tear something.
Best regards
Dick AD1G
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