[Yaesu] Yaesu FT 101EE ALC

[certified-electronics at juno.com]

Gary, Thanks for the vote of approval in writing to me directly.
I'm still on the group but I don't contribute as much as I use to.
I'm too busy working on rigs and amplifiers and don't have the time
to write as much as I would like to.

I take it from what you are saying, you have no output on SSB at all.
I'm also assuming you have good power output on all bands.
Did you try and check modulation on AM mode ~output at approx 20 watts. 
See if you can hear your microphone audio in another receiver for
starters and
try to confirm your microphone is working.

Take the advice from Guillermo - LU8EYW and double check your
idle current on SSB without modulation before you do anything else.  Make
sure it's at 60 ma, if not adjust it for 60 ma and leave it alone after
that.
Do not attempt excessive tuning of your PA, take it easy on your finals
as
they are getting costly.
 
Sounds to me like you might have ALC problems if you have no
output in SSB.  If the transmitter power output is zero in SSB mode,
and NORMAL IN THE TUNE MODE, it is possible that the transceiver has
ALC problems.  With the transmitter loaded in the tune position, switch
to the SSB
mode and ground the anode of D2 ALC rectifier.  Whistle into the mike and
see if transmitter power output is back to normal.  D2 can be found by
looking into
the bottom of the PA stage with all shielding removed.
You will see two diodes, D3 going to ground and D2 is
connected to D3 anode.  Both of these diodes sit very near the base of
the two final amplifier tube sockets of a small terminal strip and are
easy to find.
Be careful when probing around in the bottom of the
transceiver and be aware there is high voltages under the chassis, just
had to 
throw that in as a disclaimer!  Just be careful and use common sense.
Let me know if you any luck with this.  Ground D2 and talk into the
microphone
see if you get your full power back on the watt meter.  I assume you have
a place where you can turn the rig on it's side and gain access to the
bottom
of the rig and by all means use a dummy load and be careful when under
that chassis.

Regards
CL. Maher
W4CLM   
Certified Electronics



On Mon, 9 Feb 2004 00:46:37 EST bigtpranch at aol.com writes:
Carol,
I have done a bunch of reading on the Yaesu mailing list and you seem to
know more about the FT 101EE than anyone . I posted a question there, but
wasnt sure if you still are involved with the group, so I thought I would
send you the same question with the hopes that you might have an answer.
I  just purchased a Yaesu FT 101EE after getting my General license ,
twenty 
years after getting my novice ticket so I am learning alot of new things
that 
werent required when operating my little Heath HW 8. I carefully studied
the 
manual, and tuned the transmitter into a dummy load prior to my first
attempt at 
a phone contact. After switching to LSB (on 40 m band)  I attempted to
set 
the mic gain, per the manual, but there was no change in the ALC meter 
regardless of the gain setting (it jumped to near full deflection and
stayed there with 
the mic keyed). No output into the dummy load was seen. ( It did load up
the 
dummy load when in tune mode).  Would anyone have an idea where to look
for a 
problem? I've checked the mic with an ohmmeter, I have about 40 ohms at
the 
element and around 1200 ohms at the plug. Thanks for the help.

                                                                         
    
       Gary (KC0RMI)