From: Garey Barrell 
Subject: Re: [drakelist] L4B


Garey Barrell  made an utterence to the drakelist gang
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Jack -

With no connection to the VOX connector on the back of the L-4B, the 
Multimeter will read any RF forward or reflected. 

You should read ~1.9 kV in CW and ~2.6 kV in SSB on the Plate Voltage 
position. 

If you push in the AGC/Standby knob and short the two pin VOX connector 
on the rear panel (~30V {at} ~60 mA), you should see (assuming Eimac 3-500Z 
tubes) ~170 mA Plate Current in CW and ~260 mA in SSB with no drive applied.

73, Garey - K4OAH
Atlanta

Jack Wilson wrote:

>"Jack Wilson"  made an utterence to
the drakelist gang
>----------------------------------------------------------------------
>
>Hi all,
>
>I am trying to bring back to life my L4B purchased used in 1971.  I used it
>daily
>up until 1997, then took it off line and have not used it since.
>
>I took it out of the boxes and changed the relays to 120 volts.  Then
>plugged it in on
>CW/Tune.  Every thing lights up and seems to be OK.  I left it running for
>an hour and a half and then switched it over to SSB and the SSB red light
>comes on.
>
>All of this makes me feel better but, I do not have any readings on the
>meters.  I believe
>that it is 100% in standby when it is in this stage and that there should
>not be any readings on the meters, but I can't remember how it was when I
>used it every day.
>
>The next thing I did was to connect the RF in and RF out thru the amp and
>key my Icom
>718.  The watt meters  on the L4B read correctly, but I do not have any
>reading on the
>current or voltage meters.
>
>I think that this is the way it should be, but I am not sure.
>
>I don't have the cable to hook up the VOX from the exciter's Send terminal
>to the L4B, so
>I can't test it this way.
>
>Can anyone let me know what their L4B meters read when the amp is in
>complete standby
>with the exciter running thru the RF in and out but the VOX not connected?
>
>Any help or advice would be greatly appreciated.
>
>Thanks in advance.
>
>Jack
>K1HW
>
>
>  
>
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