¿ªÔÆÌåÓý

  1. BITX20
  2. Messages
Single Messages Topics Expanded Polls

Re: increase frequency coverage

 

hi do you mean ?to reduce turn number in L4 by how much turn? what is the inductance value for the L4 nominal?


On Fri, 3 Feb, 2017 at 12:27, Raj vu2zap
<vu2zap@...> wrote:
Change the varactor to one that has higher capacitance tune ratio or

Alternatively, add an MV209 or 2109 in parallel with the one on the PCB
The tuning range will increase.

You may need to tweak the trimmer and maybe change some turns on
the yellow VFO toroid.

I was able to do that easily!

73 Raj

At 03-02-2017, you wrote:

>Hi,
>
>? ? Kindly help, Is there a way to increase frequency coverage? of BITX40 v3
>
>? ? from 7.100 to 7.500 mhz ( a 400khz bandwidth or more )? By the way? my
>
>? ? BITX40 V3? is non Raduino? and? using the? stock? vfo.
>
>
>? ? Regards,
>
>? ? Ricardo Rivera
Join [email protected] to automatically receive all group messages.