Re: G3WDG Filters for 2 mtr to 10GHz receiver


Paul G8AQA
 

Brass would need to be silver plated in view of the poor conductivity of brass.
15 mm copper pipe caps adjusted to the required length should be quite adequate.  Pipe cap filters can be tuned over quite a range.

If you have a pipe expander you could increase the internal diameter to 16mm. I doubt whether this would be necessary.

If you use a BA screw rather than an ISO Metric you will get a slightly finer adjustment and better thread contact. The contact angle is 47.5 degrees rather than 60 degrees.

73
Paul G8AQA

On 17/01/2022 09:45, Chris G8BKE wrote:
The dimensions are in the Microwave Handbook Vol 3 ...see attached

73


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