F600 v1.0 LPF Kit full assembly instructions

4 Comments

1. 

   Andy Beales on 13th December 2020 at 5:39 am

   I purchased the full kit recently, it arrived safely and I am impressed with the quality.
   I have only just been able to start assembly. The silver wire supplied with the filter kit is too short to make L13 and L14 as per the instructions. One piece is 15.5cm and the other is 18.5cm. Have you changed the number of turns needed or perhaps the coil diameter? Please advise.
   Thank you,
   Andy Beales VK4KCS

   Reply
   • 

     Razvan on 13th December 2020 at 5:55 am

     Hi Andy,

     I originally included a slightly longer length of wire than needed, to make it easier to wind; this is the value mentioned in the instructions. However, that proved to be a bit confusing so now kits come with the wires cut to the exact length. If you wind them as per the assembly instructions, inductors should end up with the correct value and the filter curve should have a resonably good shape. To get minimal insertion loss at 70MHz and the best attenuation slope, you can tune the filter with a VNA/spectrum analyzer w. tracking generator or similar; even a nanoVNA will do just fine.

2. 

   ROBSON GERALDO SILVEIRA E SILVA on 15th March 2022 at 11:46 am

   Hello Razvan, my name is Robson (PY4HI) you sell this Kit (assembled) because here in Brazil it is very difficult to get the project items, if so, let me know the value. visit my home page at QRZ.com

   Reply
3. 

   ROBSON GERALDO SILVEIRA E SILVA on 15th March 2022 at 12:50 pm

   Razvan, what is the price of the kit and how do I buy it?
   Grateful,

   Robson PY4HI

   Reply