|
Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
|
Thread Tools |
26th Jul 2021, 6:50 pm | #1 |
Nonode
Join Date: Mar 2005
Location: Nuneaton, Warwickshire, UK.
Posts: 2,034
|
Low Pass Filter Circuit ?
Hello all,
I've been trying to find a circuit diagram and other details for a Low Pass Filter for Amateur Radio use below 30mhz. The sort of thing often found in RSGB communications handbook, or maybe ARRL equivalent, back in the 50s and 60s. No torroids, but airwound coils and capacitors in T / Pi sections, with up to 100 watts of carrier power handling. Many thanks Aub
__________________
Life's a long song, but the tune ends too soon for us all. |
29th Jul 2021, 5:41 pm | #2 |
Hexode
Join Date: Nov 2011
Location: Chippenham, Wiltshire, UK.
Posts: 319
|
Re: Low Pass Filter Circuit ?
Have a look at
https://pa0fri.home.xs4all.nl/Divers...s%20filter.htm half-way down the page for air core inductors. Peter G3PIJ |
29th Jul 2021, 5:53 pm | #3 |
Nonode
Join Date: Mar 2005
Location: Nuneaton, Warwickshire, UK.
Posts: 2,034
|
Re: Low Pass Filter Circuit ?
Hi Peter
Many thanks for that. It looks like just the sort of thing I'm after. 73 Aub
__________________
Life's a long song, but the tune ends too soon for us all. |