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Re: Transverter
Pete - GM4BYF
I have used one for a year and it is the prime mover for my 23cm system - SG labs very helpful when I accidently sent 10W of 144 Mhz into it - I just had to replace a resistor. Yes the self tappers are a slight problem. I bought a bag of replacements. Some evidence of overloading by a local cellphone station as I run the separate RX and TX options- but largely ameliorated by the masthead SSB preamp. Pete GM4BYF
On 11/10/18 19:27, philwill73@...
wrote:
Hello all, --
vry 73 Pete GM4BYF
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Re: Transverter
ian hope (2E0IJH)
I've used one of john's ztr's filters on mine for exactly that reason
Ian
2E0IJH
Sent: Thursday, October 11, 2018 at 7:58 PM
From: "Andy TALBOT" <andy.g4jnt@...> To: UKMicrowaves@groups.io Subject: Re: [UKMicrowaves] Transverter Only snag I found was when Tx and RX ports are separated to use with an external PA. Then you lose the printed BP filter on receive, as it then just becomes a Tx cleaning filter. So the mixer becomes susceptible to 3G base station interference as a third order term, 2.LO - RF. So if you have a 3G base station locally that happens to be on that channel ...
Andy
On Thu, 11 Oct 2018 at 19:51, Mark Horn <mhorn71@...> wrote:
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Re: Transverter
Only snag I found was when Tx and RX ports are separated to use with an external PA. Then you lose the printed BP filter on receive, as it then just becomes a Tx cleaning filter. So the mixer becomes susceptible to 3G base station interference as a third order term, 2.LO - RF. So if you have a 3G base station locally that happens to be on that channel ... Andy
On Thu, 11 Oct 2018 at 19:51, Mark Horn <mhorn71@...> wrote:
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Re: Transverter
Mark - M0WGF
Hi Phil, I've recently bought one of the sg-labs 23cm tvrx and have no complaints my only gripe is with the self tapping screws holding the top and bottom on the unit.
Hristiyan answered all my questions when I ordered and is quiet quick at replying to emails. 73 de Mark M0WGF
On Thu, 11 Oct 2018 at 19:27, <philwill73@...> wrote: Hello all,
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Re: Diplexer design
SAM JEWELL
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On Thursday, October 11, 2018, 6:51 pm, John Worsnop <johnworsnop@...> wrote:
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Transverter
Phil Williams
Hello all,
I'm looking to buy a 1296Mhz SG-Labs transverter. I'm ok to get a new one but I thought I'd ask here first. 73 Phil G3YPQ N.Cornwall
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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Re: Diplexer design
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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Diplexer design
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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DEMI 144-28Mhz Transverter Interface Transverter For Sale via e-bay
Chris Packman <chris_packman@...>
Surplus to requirements so off to a new home….. Intended for use as the previous input stage to a 144Mhz input transverter for the microwave bands…. 73 Chris G6XDI
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