Some change in Settings

[Jack Cantrell]

Dave,

I have let the units warm up now for a couple of hours
and these are my current (no pun intended) readings:

Driver = Full, 3:00 O'Clock
Level = High Noon
Final = 40 meters
Func = Trcvr
Band = 7.0
Tune ON
    Grid = 0
    Plate = 220 (note the change)
    Rel Pwr = 4.0 (again note change)
Tune OFF

Please excuse me for some XYL time / XMAS shopping.  I
will come back your way later today.  I have a key,
but have only a digital multimeter, which I understand
is not the right tool.  I do not have the plastic
tuning sticks.

I will disconnect all and swap the antenna over to the
HW-16 before writing again.

Best to you,

Jack
--- KD2E <ham at cybercomm.net> wrote:
> I set my SB401 up on a chair next to my computer. It
> is working fine. I will
> let you know where the all the controls are...
> Final                  in the 10 15 20 meter area
> Loading            50ohm
> Mic/CW level   2o'clock
> Freq control      unlocked
> Driver                4th line from the left
> meter                 rel pwr
> Function             tran
> band                  14
> dial                     set to 14.100
> mode                  anywhere but tune
>
> The only thing plugged in to the transmitter is a
> 110 volt line chord, and a
> piece of coax going to my dummy load.
>
> Now, when I put the mode in 'tune' I hear a carrier
> on my TS850 which is
> connected to the beam on the tower. The SB401 meter
> goes to about a 5 on the
> top scale. If meter is switched to plate, it reads
> about 250 ma.
> Jack... I would suggest unhooking the SB303
> receiver, and setting the
> transmitter up the way I have it. The receiver only
> adds confusion.
>
> I will assume that after doing this, you still get
> no signs of life. Either
> on the meter or the receiver. By the way....you have
> to tune the receiver
> around a bit. You may not be exactly on the
> frequency you are tuned to.
> So, the next step will be to have a look in the
> manual on page 96.
> The heading at the bottom, "Alignment with SBA-401-1
> etc. etc.
> Make sure you have those crystals installed.
> On the top of page 97 starts the alignment. The
> equipment required mentions
> having a key, so we won't do the alignment until you
> get a key. But, what
> you can quickly check is the heterodyne oscillator
> at the bottom of the
> page. You don't have to adjust anything or do
> anything. Just set up the
> switches the way they say, and stick a voltmeter
> lead in to the test jack.
> The test jack is just to the right of all the
> crystals which are to the
> right of that tube you were questioning earlier. The
> other lead goes to
> ground (clip it to the ground lug on the back, or
> any metal part of the
> transmitter chassis). It will be a negative voltage,
> so set your meter up
> accordingly, or swap the leads so you can measure
> it.
> Now just rotate the bandswitch to make sure you see
> a reading on each band.
> You can adjust it later when you are ready to do the
> whole thing. You just
> want to make sure for now that something is there.
> The book says it should
> be about -3 volts. It should be around there (-1 to
> -5 or so).
> If that is ok, than stop 'till you are ready to do
> the whole alignment. You
> will need those little plastic hexagonal 'diddle'
> sticks to adjust things
> with.
> Now you are about where I am at with my KWM2A.
> (Do nothing until you are ready for complete
> alignment)
> ....Dave
>
> PS.... I also listened with the MIC CW level fully
> counterclockwise.....reading only the 50ma. resting
> plate current. On
> transmit, I still hear my signal on the Kenwood
> TS850
> ----- Original Message -----
> From: "Jack Cantrell" <jack_cantrell at yahoo.com>
> To: "KD2E" <ham at cybercomm.net>
> Sent: Saturday, December 02, 2000 11:02 AM
> Subject: Re: SB-401 won't tune up (2)
>
>
> > Dave,
> >
> > I get no signal to the HW-16 on either
> > Locked/Transceive, or UnLocked/Transmit.  But I do
> get
> > 50 mA of Plate.
> >
> > What's next?
> >
> > Jack


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