SB-401 ALC problem

[rayfri]

I have the same kind of ALC indication on my SB 102.   In transmit, the 
ALC goes negative....
Am interested in comments on this....
Ray  wa7itz

Warren Dean wrote:

>Hello to all. I am the proud new Heathkit SB line owner with some SB-401
>problems. I have had a major "SB Jones" for a long time and finally did it.
>In setting up the twins and aligning, I have run across a couple of issues
>with the 401. The 301 aligned perfectly and impresses me with it's
>sensitivity. I did a 3 way head-to-head comparison against my Drake R4-B and
>Swan 600-R/C and the SB-301 heard every weak signal that the other 2 did.
>Now, if I can just get the 401 to operate properly..  :-)
>
> 
>
>1)       I get a negative meter deflection on transmit when in the ALC
>position. I am curious if someone else on the list has had a similar problem
>and found the cause. 
>
>2)       If I decided to not use the cables for XCV operation (station
>layout), could the tone that is heard when in TRAN mode can be eliminated?
>
>3)       I get no drive from the amplified D-104 mic I am going to use with
>it. It is a known functioning mic and I am guessing that this is related to
>item 1.
>
> 
>
>Any help would be appreciated. I am not much of an electronics tech, but I
>can read a schematic and run a DVOM and soldering iron, so I am convinced
>the 401 is fairly easily repaired.
>
> 
>
> Thanks in advance,
>
> 
>
>Warren Dean
>
>NI5L
>
> 
>
> 
>
>
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