[Boatanchors] D 104 microphone Question

[k8wbl@wb8nut.com]

You might also check to see if a 47K resistor was added to the hot side of
the microphone, that was done alot with these as it tended to flatten out
the response somewhat on the Drake transmitters.  73  Tim  K8WBL>

 Hi:
>
> I have a question concerning the D 104 microphone line.
>
> I have an unamplified  D 104 and base.  It has plenty of audio going into
> my SB 401 or Marauder (I like Heathkits).  I get good audio reports with
> this set up.
>
> I took the mic head off of an amplified base and tried it on my
> unamplified base.
> This arrangement hardly moves the meter in the transmitter and I have to
> run the audio control all the way to end but still come up short level
> wise.
>  One thing I did notice is that the old unamplified head has the standard
> Astatic black label on it.  The head from the amplified base has no
> label.
> What's going on here?  I thought I could switch heads between any base and
> head but apparently not.  Can someone give me some background information.
> I sure would appreciate it.
> Bill: This might explain what happened on the D 104 head you loaned me
> recently.
> 73's
> Greg
> WA7LYO
> in sunny Feenix
>
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