[Central-Electronics] 200V transmit bandwidth

[JAMES D COMSTOCK]

I have generally found the bandwidth of my 100v's to be very close to the specified 3.3Khz as long as the filter capacitors are in spec, the filter is not being overdriven by the limiter and the correct dynamic mic is in use.

 I believe the 200v uses the same filter.

 The only mod I have done was to increase the value of the input coupling capacitor [and the low frequency response] on the 100v that I use for AM. Jim

> On 02/28/2021 10:15 PM Kihwal Lee via Central-Electronics <central-electronics at mailman.qth.net> wrote:
> 
>  
> Hi,
> I finally managed to restore and align my 200V.  The unwanted sideband suppression is better than 40dB consistently, but I noticed that the transmit bandwidth is at least 4kc.  Is it normal?  The manual says 200-3500kc. Has anyone tweaked the filter module to make it narrower?  Although it is wide, I see the response is rather steep. I just want the cut-off frequency to be bit lower, like 3kHz.
> 73Kihwal, K9SUL
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