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Diplexer design
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John Fell
Has anyone got a 50 Ohm Diplexer design suitable for combining 144MHZ @ 3dBm with 2256MHZ @ 10dBm .Need to use single feeder run to masthead from shack (will carry 12V DC @ 300mA on same coaxial cable run)for personal Beacon use. 73 John G0API
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Simple enough. Estimate 3 small Ls and a handful of ceramic Cs But you'll have to wait until after the Convention for a design from here ... Andy
On Thu, 11 Oct 2018 at 15:50, John Fell <john.g0api@...> wrote:
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John Fell
FB OM. Its wet here today so Monday is fine .... John
On Thu, 11 Oct 2018 at 15:56, Andy TALBOT <andy.g4jnt@...> wrote:
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SAM JEWELL
Tonna free software ‘diplexer’. Together with Elsie filter design.
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Sam, G4DDK
On Thursday, October 11, 2018, 3:56 pm, Andy TALBOT <andy.g4jnt@...> wrote:
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John Quarmby
Try here John: Scroll down to a program called Diplexer 73 John G3XDY On 11/10/2018 14:50, John Fell wrote:
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Off the top of my head, without using any design tools : 2GHz path 10pF from common port to LO input. 1/4 wave of wire close wound on say 3mm dialmeter from there to deck 144MHz path, bit trickier, but if match isn't important, try 4 turns 6mm diameter common port to 144MHz port. Then 10pF to groud. That gives you a basic high-pass low pass diplexer Separate out DC at 144 - say 1nF and 200nH and another 1nF to decouple DC line ... that turns it into a triplexer Andy
On Thu, 11 Oct 2018 at 16:01, John Fell <john.g0api@...> wrote:
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SAM JEWELL
That should be Tonne software, of course.
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On Thursday, October 11, 2018, 4:09 pm, SAM JEWELL via Groups.Io <jewell@...> wrote:
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Richard <richard@...>
On Thu, 2018-10-11 at 15:50 +0100, John Fell wrote:
Has anyone got a 50 Ohm Diplexer design suitable for combiningHi John Depending on what type of mixer you are using at masthead, you may not need to separate the two frequencies, then that just leaves getting the DC off the feeder which is much easier . Unless the diplexer is very efficient you will end up with 144 and 2256 on either port with just the levels changed, then when you recombine at the mixer the will probably be a phase difference between the original components _._,_._,_-- Best wishes /73 Richard Bown Email : richard@... HTTP : http://www.g8jvm.com ###################################################################### Ham Call: G8JVM . QRV: 50-432 MHz + Microwave Maidenhead QRA: IO82SP38, LAT. 52 39.720' N LONG. 2 28.171 W QRV 6mtrs 200W, 4mtrs 150W, 2mtrs 300W, 70cms 200W, Microwave 1296MHz 140W, 2320MHz 100W & 10368MHz 5W OS: Linux Mint 19 x86_64 Tara, on a Dell Inspiron N5030 laptop ######################################################################
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John Fell
Thanks for ideas folks .The combined feed will go to a 1992 built G3WDG TX mixer , 2556MHZ for the 1/4 LO and 144MHZ to wobble the output with a few milli Watts to feed to small PA module . Will let you know if and when it works. At least in the shack the reduced height slotted WG antenna pattern looks better than before the hacksaw was applied yesterday and the large soldering iron today. Such Fun. 73 John G0API PS IO80 worked IO90 one way via 10GHZ EME last Monday -G4RFR TX , M0EYT RX - is this a First ?
On Thu, 11 Oct 2018 at 17:01, Richard <richard@...> wrote: On Thu, 2018-10-11 at 15:50 +0100, John Fell wrote:
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John Worsnop
TonnE Not Tonna.......
On Thu, 11 Oct 2018, 16:09 SAM JEWELL via Groups.Io, <jewell=btinternet.com@groups.io> wrote:
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SAM JEWELL
Know all!
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Sam
On Thursday, October 11, 2018, 5:51 pm, John Worsnop <johnworsnop@...> wrote:
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John Worsnop
Bugger you then. Only trying to help!
On Thu, 11 Oct 2018, 18:11 SAM JEWELL via Groups.Io, <jewell=btinternet.com@groups.io> wrote:
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Language , Timothy
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From the senior moderator :-)
On Thursday, 11 October 2018, John Worsnop <johnworsnop@...> wrote:
-- Andy 'JNT (out walking)
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SAM JEWELL
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On Thursday, October 11, 2018, 6:51 pm, John Worsnop <johnworsnop@...> wrote:
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